332 results
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2. Skilful Forecasts of Summer Rainfall in the Yangtze River Basin from November.
- Author
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Bett, Philip E., Dunstone, Nick, Golding, Nicola, Smith, Doug, and Li, Chaofan
- Subjects
WATERSHEDS ,WATER management ,EL Nino ,SPRING ,FORECASTING ,RAINFALL - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
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3. A Deep Learning Approach for Forecasting Thunderstorm Gusts in the Beijing-Tianjin-Hebei Region.
- Author
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Liu, Yunqing, Yang, Lu, Chen, Mingxuan, Song, Linye, Han, Lei, and Xu, Jingfeng
- Subjects
- *
THUNDERSTORMS , *THUNDERSTORM forecasting , *DEEP learning , *RADAR meteorology , *AUTOMATIC meteorological stations , *CONVOLUTIONAL neural networks - Abstract
Thunderstorm gusts are a common form of severe convective weather in the warm season in North China, and it is of great importance to correctly forecast them. At present, the forecasting of thunderstorm gusts is mainly based on traditional subjective methods, which fails to achieve high-resolution and high-frequency gridded forecasts based on multiple observation sources. In this paper, we propose a deep learning method called Thunderstorm Gusts TransU-net (TG-TransUnet) to forecast thunderstorm gusts in North China based on multi-source gridded product data from the Institute of Urban Meteorology (IUM) with a lead time of 1 to 6 h. To determine the specific range of thunderstorm gusts, we combine three meteorological variables: radar reflectivity factor, lightning location, and 1-h maximum instantaneous wind speed from automatic weather stations (AWSs), and obtain a reasonable ground truth of thunderstorm gusts. Then, we transform the forecasting problem into an image-to-image problem in deep learning under the TG-TransUnet architecture, which is based on convolutional neural networks and a transformer. The analysis and forecast data of the enriched multi-source gridded comprehensive forecasting system for the period 2021–23 are then used as training, validation, and testing datasets. Finally, the performance of TG-TransUnet is compared with other methods. The results show that TG-TransUnet has the best prediction results at 1–6 h. The IUM is currently using this model to support the forecasting of thunderstorm gusts in North China. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. A Concise Overview on Solar Resource Assessment and Forecasting.
- Author
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Yang, Dazhi, Wang, Wenting, and Xia, Xiang'ao
- Subjects
CARBON offsetting ,ATMOSPHERIC radiation ,ATMOSPHERIC sciences ,FORECASTING ,SOLAR radiation ,PENETRATION mechanics - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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5. Seamless Prediction in China: A Review.
- Author
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Ren, Hong-Li, Bao, Qing, Zhou, Chenguang, Wu, Jie, Gao, Li, Wang, Lin, Ma, Jieru, Tang, Yao, Liu, Yangke, Wang, Yujun, and Zhao, Zuosen
- Subjects
LONG-range weather forecasting ,CLIMATE change ,FORECASTING ,SOCIAL development ,WEATHER - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
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6. Recent Progress in Studies on the Influences of Human Activity on Regional Climate over China.
- Author
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Duan, Jianping, Zhu, Hongzhou, Dan, Li, and Tang, Qiuhong
- Subjects
CLIMATE extremes ,CLIMATE change mitigation ,CLIMATE change ,ATMOSPHERIC temperature ,WIND speed ,DROUGHTS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
7. A Review of Atmospheric Electricity Research in China from 2019 to 2022.
- Author
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Lyu, Weitao, Zheng, Dong, Zhang, Yang, Yao, Wen, Jiang, Rubin, Yuan, Shanfeng, Liu, Dongxia, Lyu, Fanchao, Zhu, Baoyou, Lu, Gaopeng, Zhang, Qilin, Tan, Yongbo, Wang, Xuejuan, Liu, Yakun, Chen, Shaodong, Chen, Lyuwen, Li, Qingyong, and Zhang, Yijun
- Subjects
ATMOSPHERIC electricity ,THUNDERSTORMS ,UPPER atmosphere ,LIGHTNING - Abstract
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- Published
- 2023
- Full Text
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8. Homogenised Monthly and Daily Temperature and Precipitation Time Series in China and Greece since 1960.
- Author
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Argiriou, Athanassios A., Li, Zhen, Armaos, Vasileios, Mamara, Anna, Shi, Yingling, and Yan, Zhongwei
- Subjects
TIME series analysis ,DATA libraries ,SPRING ,AUTUMN ,TEMPERATURE - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
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9. Seasonal Cumulative Effect of Ural Blocking Episodes on the Frequent Cold events in China during the Early Winter of 2020/21.
- Author
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Yao, Yao, Zhang, Wenqi, Luo, Dehai, Zhong, Linhao, and Pei, Lin
- Subjects
NORTH Atlantic oscillation ,SEASONS ,SEA ice ,WINTER ,LA Nina ,POLAR vortex - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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10. One-Dimensional Variational Retrieval of Temperature and Humidity Profiles from the FY4A GIIRS.
- Author
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Xue, Qiumeng, Guan, Li, and Shi, Xiaoning
- Subjects
ATMOSPHERIC temperature ,STANDARD deviations ,METEOROLOGICAL satellites ,HUMIDITY ,ATMOSPHERIC layers ,TEMPERATURE - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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11. Precipitation Microphysical Characteristics of Typhoon Ewiniar (2018) before and after Its Final Landfall over Southern China.
- Author
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Feng, Lu, Xiao, Hui, Liu, Xiantong, Hu, Sheng, Li, Huiqi, Xiao, Liusi, and Hao, Xiao
- Subjects
LANDFALL ,TYPHOONS ,TROPICAL cyclones ,HAIL ,RAINFALL ,RAINDROP size ,RAINDROPS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
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12. On the Key Dynamical Processes Supporting the 21.7 Zhengzhou Record-breaking Hourly Rainfall in China.
- Author
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Wei, Peng, Xu, Xin, Xue, Ming, Zhang, Chenyue, Wang, Yuan, Zhao, Kun, Zhou, Ang, Zhang, Shushi, and Zhu, Kefeng
- Subjects
RAINFALL ,THUNDERSTORMS ,AIR travel ,MADDEN-Julian oscillation ,CONVECTION (Meteorology) - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
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13. Aircraft Observation and Simulation of the Supercooled Liquid Water Layer in a Warm Conveyor Belt over North China.
- Author
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Yang, Jiefan, Yan, Fei, Lei, Hengchi, Jia, Shuo, Dong, Xiaobo, and Hu, Xiangfeng
- Subjects
- *
SUPERCOOLED liquids , *CONVEYOR belts , *BELT conveyors , *MICROPHYSICS , *SUPERCOOLING , *PHYSICS - Abstract
This paper studied a snow event over North China on 21 February 2017, using aircraft in-situ data, a Lagrangian analysis tool, and WRF simulations with different microphysical schemes to investigate the supercooled layer of warm conveyor belts (WCBs). Based on the aircraft data, we found a fine vertical structure within clouds in the WCB and highlighted a 1–2 km thin supercooled liquid water layer with a maximum Liquid Water Content (LWC) exceeding 0.5 g kg−1 during the vertical aircraft observation. Although the main features of thermodynamic profiles were essentially captured by both modeling schemes, the microphysical quantities exhibited large diversity with different microphysics schemes. The conventional Morrison two-moment scheme showed remarkable agreement with in-situ observations, both in terms of the thermodynamic structure and the supercooled liquid water layer. However, the microphysical structure of the WCB clouds, in terms of LWC and IWC, was not apparent in HUJI fast bin scheme. To reduce such uncertainty, future work may focus on improving the representation of microphysics in bin schemes with in-situ data and using similar assumptions for all schemes to isolate the impact of physics. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
14. Atmospheric Disturbance Characteristics in the Lower-middle Stratosphere Inferred from Observations by the Round-Trip Intelligent Sounding System (RTISS) in China.
- Author
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He, Yang, Zhu, Xiaoqian, Sheng, Zheng, Ge, Wei, Zhao, Xiaoran, and He, Mingyuan
- Subjects
GRAVITY waves ,SOUND systems ,STRATOSPHERE ,ATMOSPHERIC waves ,TURBULENCE - Abstract
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- Published
- 2022
- Full Text
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15. CLDASSD: Reconstructing Fine Textures of the Temperature Field Using Super-Resolution Technology.
- Author
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Tie, Ruian, Shi, Chunxiang, Wan, Gang, Hu, Xingjie, Kang, Lihua, and Ge, Lingling
- Subjects
DOWNSCALING (Climatology) ,STANDARD deviations ,DEEP learning ,TEXTURES ,MACHINE learning - Abstract
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- Published
- 2022
- Full Text
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16. Response of Growing Season Gross Primary Production to El Niño in Different Phases of the Pacific Decadal Oscillation over Eastern China Based on Bayesian Model Averaging.
- Author
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Li, Yueyue, Dan, Li, Peng, Jing, Wang, Junbang, Yang, Fuqiang, Gao, Dongdong, Yang, Xiujing, and Yu, Qiang
- Subjects
GROWING season ,OSCILLATIONS ,MULTISCALE modeling ,CARBON cycle - Abstract
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- Published
- 2021
- Full Text
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17. Spatial and Temporal Distributions and Sources of Anthropogenic NMVOCs in the Atmosphere of China: A Review.
- Author
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Wang, Fanglin, Du, Wei, Lv, Shaojun, Ding, Zhijian, and Wang, Gehui
- Subjects
FORMALDEHYDE ,VOLATILE organic compounds ,EMISSION inventories ,MATRIX decomposition ,SPATIO-temporal variation ,ATMOSPHERE ,TREND analysis - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
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18. The Interannual Variation of Transboundary Contributions from Chinese Emissions of PM2.5 to South Korea.
- Author
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Han, Xiao and Zhang, Meigen
- Subjects
AIR quality ,EMISSION inventories ,ENVIRONMENTAL monitoring ,POLLUTION ,ATMOSPHERIC sciences ,POLLUTANTS - Abstract
In recent years, several studies pointed out that anthropogenic emission sources in China which significantly contribute to the PM
2.5 mass burden was an important cause of particulate pollution in South Korea. However, most studies generally focused upon a single pollution event. It is rare to see comprehensive research that captures those features prone to interannual variations concerning the transboundary pollutant contribution in South Korea using a unified method. In this paper, we establish the emission inventories covering East Asia in 2010, 2015, and 2017, and then conduct the source apportionment by applying a coupled regional air quality model called the Integrated Source Apportionment Module (ISAM). Comparison of simulated and observed PM2.5 mass concentration at 165 CNEMC (China National Environmental Monitoring Center) sites suggests that the PM2.5 concentrations are well represented by the modeling system. The model is used to quantitatively investigate the contribution from emission sources in China to PM2.5 concentrations over South Korea and those features found to be prone to interannual variations are then discussed. The results show that the average annual contribution of PM2.5 has dropped significantly from 28.0% in 2010 to 15.7% in 2017, which strongly suggests that China has achieved remarkable results in the treatment of atmospheric particulates. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
- View/download PDF
19. On the Mechanism of a Terrain-Influenced Snow Burst Event during Midwinter in Northeast China.
- Author
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Li, Na, Jiao, Baofeng, Ran, Lingkun, Shen, Xinyong, and Qi, Yanbin
- Subjects
GRAVITY waves ,GAMMA ray bursts ,TOPOGRAPHY ,WEATHER - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
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20. Phase Two of the Integrative Monsoon Frontal Rainfall Experiment (IMFRE-II) over the Middle and Lower Reaches of the Yangtze River in 2020.
- Author
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Cui, Chunguang, Dong, Xiquan, Wang, Bin, and Yang, Hao
- Subjects
RAINFALL ,MONSOONS ,ICE clouds ,CLOUD droplets ,RIVERS ,RAINDROPS - Abstract
Phase Two of the Integrative Monsoon Frontal Rainfall Experiment (IMFRE-II) was conducted over the middle and lower reaches of the Yangtze River during the period 16 June to 19 July 2020. This paper provides a brief overview of the IMFRE-II field campaign, including the multiple ground-based remote sensors, aircraft probes, and their corresponding measurements during the 2020 mei-yu period, as well as how to use these numerous datasets to answer scientific questions. The highlights of IMFRE-II are: (1) to the best of our knowledge, IMFRE-II is the first field campaign in China to use ground-based, airborne, and spaceborne platforms to conduct comprehensive observations over the middle and lower reaches of the Yangtze River; and (2) seven aircraft flights were successfully carried out, and the spectra of ice particles, cloud droplets, and raindrops at different altitudes were obtained. These in-situ measurements will provide a "cloud truth" to validate the ground-based and satellite-retrieved cloud and precipitation properties and quantitatively estimate their retrieval uncertainties. They are also crucial for the development of a warm (and/or cold) rain conceptual model in order to better understand the cloud-to-rain conversion and accretion processes in mei-yu precipitation events. Through an integrative analysis of ground-based, aircraft, and satellite observations and model simulations, we can significantly improve our cloud and precipitation retrieval algorithms, investigate the microphysical properties of cloud and precipitation, understand in-depth the formation and dissipation mechanisms of mei-yu frontal systems, and improve cloud microphysics parameterization schemes and model simulations. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
21. Contribution of Global Warming and Atmospheric Circulation to the Hottest Spring in Eastern China in 2018.
- Author
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Lu, Chunhui, Sun, Ying, Christidis, Nikolaos, and Stott, Peter A.
- Subjects
ATMOSPHERIC circulation ,HOT springs ,GLOBAL warming ,ATMOSPHERIC temperature ,ELECTRIC power transmission - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
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22. Influence of October Eurasian snow on winter temperature over Northeast China.
- Author
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Li, Huanlian, Wang, Huijun, and Jiang, Dabang
- Subjects
ATMOSPHERIC temperature ,SNOW & the environment ,ATMOSPHERIC circulation ,ATMOSPHERIC pressure ,ECOLOGY - Abstract
This paper addresses the interannual variation of winter air temperature over Northeast China and its connection to preceding Eurasian snow cover. The results show that there is a significant negative correlation between October Eurasian snow cover and following-winter air temperature over Northeast China. The snow cover located in eastern Siberia and to the northeast of Lake Baikal plays an important role in the winter air temperature anomaly. More (less) eastern Siberia snow in October can cause an atmospheric circulation anomaly pattern in which the atmospheric pressure is higher (lower) than normal in the polar region and lower (higher) in the northern mid-high latitudes. Due to the persistence of the eastern Siberia snow from October to the following winter, the winter atmospheric anomaly is favorable (unfavorable) to the widespread movement of cold air masses from the polar region toward the northern mid-high latitudes and, hence, lower (higher) temperature over Northeast China. Simultaneously, when the October snow cover is more (less), the SST in the northwestern Pacific is continuously lower (higher) as a whole; then, the Aleutian low and the East Asia trough are reinforced (weakened), favoring the lower (higher) temperature over Northeast China. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
23. A Review of Research on Warm-Sector Heavy Rainfall in China.
- Author
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Sun, Jianhua, Zhang, Yuanchun, Liu, Ruixin, Fu, Shenming, and Tian, Fuyou
- Subjects
LITERATURE reviews ,MESOSCALE convective complexes ,RAINFALL ,WEATHER ,NUMERICAL weather forecasting ,VALLEYS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
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24. Recent Progress of Aerosol Light-scattering Enhancement Factor Studies in China.
- Author
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Zhao, Chunsheng, Yu, Yingli, Kuang, Ye, Tao, Jiangchuan, and Zhao, Gang
- Subjects
CLOUD condensation nuclei ,AEROSOLS ,RADIATIVE forcing ,LIGHT scattering - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
25. Recent Progress in Numerical Atmospheric Modeling in China.
- Author
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Yu, Rucong, Zhang, Yi, Wang, Jianjie, Li, Jian, Chen, Haoming, Gong, Jiandong, and Chen, Jing
- Subjects
ATMOSPHERIC models ,MULTISCALE modeling ,PARALLEL computers ,TECHNOLOGICAL progress ,KEY performance indicators (Management) ,PROGRESS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
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26. A Review of Atmospheric Electricity Research in China from 2011 to 2018.
- Author
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Qie, Xiushu and Zhang, Yijun
- Subjects
ATMOSPHERIC electricity ,UPPER atmosphere ,LIGHTNING ,THUNDERSTORMS - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
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27. Contributions of Fuqing ZHANG to Predictability, Data Assimilation, and Dynamics of High Impact Weather: A Tribute.
- Author
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Meng, Zhiyong and Clothiaux, Eugene E.
- Subjects
SCIENTIFIC knowledge ,GRAVITY waves ,ATMOSPHERIC sciences ,WEATHER ,GRADUATE education ,TROPICAL cyclones - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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28. From climate to global change: Following the footprint of Prof. Duzheng YE's research.
- Author
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Fu, Congbin
- Subjects
CLIMATE change ,GLOBAL environmental change ,METEOROLOGY ,ATMOSPHERIC models - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
- Full Text
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29. A New Method of Significance Testing for Correlation-Coefficient Fields and Its Application.
- Author
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Sun, Xiaojuan, Li, Siyan, Wang, Julian X. L., Wang, Panxing, and Guo, Dong
- Subjects
STATISTICAL hypothesis testing ,MONTE Carlo method ,CLIMATE research ,PHYSICAL constants - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
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30. Optimal Gridding Process for GMI Brightness Temperature Using the Backus-Gilbert Method.
- Author
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Chen, Guangcan and Fu, Yunfei
- Subjects
MEASUREMENT errors ,GRID cells ,EARTH sciences ,BRIGHTNESS temperature ,MICROWAVES ,RADIANCE - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
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31. Changes in mean and extreme temperature and precipitation over the arid region of northwestern China: Observation and projection.
- Author
-
Wang, Yujie, Zhou, Botao, Qin, Dahe, Wu, Jia, Gao, Rong, and Song, Lianchun
- Subjects
ARID regions ,RADIATION ,MINIMUM temperature forecasting ,SPATIOTEMPORAL processes ,SIMULATION methods & models - Abstract
This paper reports a comprehensive study on the observed and projected spatiotemporal changes in mean and extreme climate over the arid region of northwestern China, based on gridded observation data and CMIP5 simulations under the RCP4.5 and RCP8.5 scenarios. The observational results reveal an increase in annual mean temperature since 1961, largely attributable to the increase in minimum temperature. The annual mean precipitation also exhibits a significant increasing tendency. The precipitation amount in the most recent decade was greater than in any preceding decade since 1961. Seasonally, the greatest increase in temperature and precipitation appears in winter and in summer, respectively. Widespread significant changes in temperature-related extremes are consistent with warming, with decreases in cold extremes and increases in warm extremes. The warming of the coldest night is greater than that of the warmest day, and changes in cold and warm nights are more evident than for cold and warm days. Extreme precipitation and wet days exhibit an increasing trend, and the maximum number of consecutive dry days shows a tendency toward shorter duration. Multi-model ensemble mean projections indicate an overall continual increase in temperature and precipitation during the 21st century. Decreases in cold extremes, increases in warm extremes, intensification of extreme precipitation, increases in wet days, and decreases in consecutive dry days, are expected under both emissions scenarios, with larger changes corresponding to stronger radiative forcing. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
32. Chen-Chao Koo and the Early Numerical Weather Prediction Experiments in China.
- Author
-
Lu, Jianhua
- Subjects
NUMERICAL weather forecasting ,ATMOSPHERIC physics ,ATMOSPHERIC circulation ,METEOROLOGY - Abstract
Although the first successful numerical weather prediction (NWP) project led by Charney and von Neumann is widely known, little is known by the international community about the development of NWP during the 1950s in China. Here, a detailed historical perspective on the early NWP experiments in China is provided. The leadership in NWP of the late Professor Chen-Chao Koo, a protégé of C. G. Rossby at the University of Stockholm during the late 1940s and a key leader of modern meteorology (particularly of atmospheric dynamics and physics) in China during the 1950s–70s, is highlighted. The unique contributions to NWP by Koo and his students, such as the ideas of formulating NWP as an "evolution" problem, in which the past data over multiple time steps are utilized, rather than an initial-value problem, and on the cybernetic aspects of atmospheric processes, i.e., regarding the motion of the atmosphere at various time scales as an optimal control system, are also emphasized. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
33. Asymmetric Drying and Wetting Trends in Eastern and Western China.
- Author
-
Wu, Wen, Ji, Fei, Hu, Shujuan, and He, Yongli
- Subjects
HILBERT-Huang transform ,DRYING ,NONPROFIT sector ,WETTING ,AGRICULTURAL productivity - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
34. Projected shifts in Köppen climate zones over China and their temporal evolution in CMIP5 multi-model simulations.
- Author
-
Chan, Duo, Wu, Qigang, Jiang, Guixiang, and Dai, Xianglin
- Subjects
CLIMATOLOGY ,FORESTS & forestry ,NATURAL resources - Abstract
Previous studies have examined the projected climate types in China by 2100. This study identified the emergence time of climate shifts at a 1◦ scale over China from 1990 to 2100 and investigated the temporal evolution of Köppen-Geiger climate classifications computed from CMIP5 multi-model outputs. Climate shifts were detected in transition regions (7%-8% of China's land area) by 2010, including rapid replacement of mixed forest (Dwb) by deciduous forest (Dwa) over Northeast China, strong shrinkage of alpine climate type (ET) on the Tibetan Plateau, weak northward expansion of subtropical winterdry climate (Cwa) over Southeast China, and contraction of oceanic climate (Cwb) in Southwest China. Under all future RCP (Representative Concentration Pathway) scenarios, the reduction of Dwb in Northeast China and ET on the Tibetan Plateau was projected to accelerate substantially during 2010-30, and half of the total area occupied by ET in 1990 was projected to be redistributed by 2040. Under the most severe scenario (RCP8.5), sub-polar continental winter dry climate over Northeast China would disappear by 2040-50, ET on the Tibetan Plateau would disappear by 2070, and the climate types in 35.9% and 50.8% of China's land area would change by 2050 and 2100, respectively. The results presented in this paper indicate imperative impacts of anthropogenic climate change on China's ecoregions in future decades. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
35. Optical, Radiative and Chemical Characteristics of Aerosol in Changsha City, Central China.
- Author
-
Wu, Xiaoyan, Xin, Jinyuan, Zhang, Wenyu, Gong, Chongshui, Ma, Yining, Ma, Yongjing, Wen, Tianxue, Liu, Zirui, Tian, Shili, Wang, Yuesi, and Wu, Fangkun
- Subjects
CARBONACEOUS aerosols ,AEROSOLS ,RADIATIVE forcing ,COAL combustion ,INDUSTRIAL pollution ,POLLUTION - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
36. Assessment of indices of temperature extremes simulated by multiple CMIP5 models over China.
- Author
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Dong, Siyan, Xu, Ying, Zhou, Botao, and Shi, Ying
- Subjects
CLIMATE change models ,ATMOSPHERIC temperature ,GLOBAL warming ,WEATHER - Abstract
Given that climate extremes in China might have serious regional and global consequences, an increasing number of studies are examining temperature extremes in China using the Coupled Model Intercomparison Project Phase 5 (CMIP5) models. This paper investigates recent changes in temperature extremes in China using 25 state-of-the-art global climate models participating in CMIP5. Thirteen indices that represent extreme temperature events were chosen and derived by daily maximum and minimum temperatures, including those representing the intensity (absolute indices and threshold indices), duration (duration indices), and frequency (percentile indices) of extreme temperature. The overall performance of each model is summarized by a 'portrait' diagram based on relative root-mean-square error, which is the RMSE relative to the median RMSE of all models, revealing the multi-model ensemble simulation to be better than individual model for most indices. Compared with observations, the models are able to capture the main features of the spatial distribution of extreme temperature during 1986-2005. Overall, the CMIP5 models are able to depict the observed indices well, and the spatial structure of the ensemble result is better for threshold indices than frequency indices. The spread amongst the CMIP5 models in different subregions for intensity indices is small and the median CMIP5 is close to observations; however, for the duration and frequency indices there can be wide disagreement regarding the change between models and observations in some regions. The model ensemble also performs well in reproducing the observational trend of temperature extremes. All absolute indices increase over China during 1961-2005. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
37. Potential impact of future climate change on crop yield in northeastern China.
- Author
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Zhou, Mengzi and Wang, Huijun
- Subjects
CLIMATE change ,CORN yields ,ATMOSPHERIC temperature ,ATMOSPHERIC models ,GLOBAL warming - Abstract
We evaluated the potential impact of future climate change on spring maize and single-crop rice in northeastern China (NEC) by employing climate and crop models. Based on historical data, diurnal temperature change exhibited a distinct negative relationship with maize yield, whereas minimum temperature correlated positively to rice yield. Corresponding to the evaluated climate change derived from coupled climate models included in the Coupled Model Intercomparison Project Phase 5 (CMIP5) under the Representative Concentration Pathway 4.5 scenario (RCP4.5), the projected maize yield changes for three future periods [2010-39 (period 1), 2040-69 (period 2), and 2070-99 (period 3)] relative to the mean yield in the baseline period (1976-2005) were 2.92%, 3.11% and 2.63%, respectively. By contrast, the evaluated rice yields showed slightly larger increases of 7.19%, 12.39%, and 14.83%, respectively. The uncertainties in the crop response are discussed by considering the uncertainties obtained from both the climate and the crop models. The range of impact of the uncertainty became markedly wider when integrating these two sources of uncertainty. The probabilistic assessments of the evaluated change showed maize yield to be relatively stable from period 1 to period 3, while the rice yield showed an increasing trend over time. The results presented in this paper suggest a tendency of the yields of maize and rice in NEC to increase (but with great uncertainty) against the background of global warming, which may offer some valuable guidance to government policymakers. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
38. Causes of mid-Pliocene strengthened summer and weakened winter monsoons over East Asia.
- Author
-
Zhang, Ran, Jiang, Dabang, and Zhang, Zhongshi
- Subjects
PLIOCENE Epoch ,SUMMER ,GLOBAL warming ,MONSOONS ,CLIMATE change - Abstract
The mid-Pliocene warm period was the most recent geological period in Earth's history that featured long-term warming. Both geological evidence and model results indicate that East Asian summer winds (EASWs) strengthened in monsoonal China, and that East Asian winter winds (EAWWs) weakened in northern monsoonal China during this period, as compared to the pre-industrial period. However, the corresponding mechanisms are still unclear. In this paper, the results of a set of numerical simulations are reported to analyze the effects of changed boundary conditions on the mid-Pliocene East Asian monsoon climate, based on PRISM3 (Pliocene Research Interpretation and Synoptic Mapping) palaeoenvironmental reconstruction. The model results showed that the combined changes of sea surface temperatures, atmospheric CO concentration, and ice sheet extent were necessary to generate an overall warm climate on a large scale, and that these factors exerted the greatest effects on the strengthening of EASWs in monsoonal China. The orographic change produced significant local warming and had the greatest effect on the weakening of EAWWs in northern monsoonal China in the mid-Pliocene. Thus, these two factors both had important but different effects on the monsoon change. In comparison, the effects of vegetational change on the strengthened EASWs and weakened EAWWs were relatively weak. The changed monsoon winds can be explained by a reorganization of the meridional temperature gradient and zonal thermal contrast. Moreover, the effect of orbital parameters cannot be ignored. Results showed that changes in orbital parameters could have markedly affected the EASWs and EAWWs, and caused significant short-term oscillations in the mid-Pliocene monsoon climate in East Asia. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
39. A review of seasonal climate prediction research in China.
- Author
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Wang, Huijun, Fan, Ke, Sun, Jianqi, Li, Shuanglin, Lin, Zhaohui, Zhou, Guangqing, Chen, Lijuan, Lang, Xianmei, Li, Fang, Zhu, Yali, Chen, Hong, and Zheng, Fei
- Subjects
WEATHER forecasting ,CLIMATE change ,ATMOSPHERIC temperature ,ATMOSPHERIC circulation ,DISASTERS - Abstract
The ultimate goal of climate research is to produce climate predictions on various time scales. In China, efforts to predict the climate started in the 1930s. Experimental operational climate forecasts have been performed since the late 1950s, based on historical analog circulation patterns. However, due to the inherent complexity of climate variability, the forecasts produced at that time were fairly inaccurate. Only from the late 1980s has seasonal climate prediction experienced substantial progress, when the Tropical Ocean and Global Atmosphere project of the World Climate Research program (WCRP) was launched. This paper, following a brief description of the history of seasonal climate prediction research, provides an overview of these studies in China. Processes and factors associated with the climate variability and predictability are discussed based on the literature published by Chinese scientists. These studies in China mirror aspects of the climate research effort made in other parts of the world over the past several decades, and are particularly associated with monsoon research in East Asia. As the climate warms, climate extremes, their frequency, and intensity are projected to change, with a large possibility that they will increase. Thus, seasonal climate prediction is even more important for China in order to effectively mitigate disasters produced by climate extremes, such as frequent floods, droughts, and the heavy frozen rain events of South China. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
40. A review of atmospheric electricity research in China.
- Author
-
Qie, Xiushu, Zhang, Yijun, Yuan, Tie, Zhang, Qilin, Zhang, Tinglong, Zhu, Baoyou, Lu, Weitao, Ma, Ming, Yang, Jing, Zhou, Yunjun, and Feng, Guili
- Subjects
ATMOSPHERIC electricity ,LIGHTNING ,THUNDERSTORMS ,COMPUTER simulation ,CLIMATE change ,ELECTRIFICATION - Abstract
The importance of atmospheric electricity research has been increasingly recognized in recent decades. Research on atmospheric electricity has been actively conducted since the 1980s in China. Lightning physics and its effects, as important branches of atmospheric electricity, have received more attention because of their significance both in scientific research and lightning protection applications. This paper reviews atmospheric electricity research based primarily on ground-based field experiments at different regions in China in the last decade. The results described in this review include physics and effects of lightning, rocket-triggered lightning and its physical processes of discharge, thunderstorm electricity on the Tibetan Plateau and its surrounding areas, lightning activity associated with severe convective storms, the effect and response of lightning to climate change, numerical simulation of thunderstorm electrification and lightning discharge, lightning detection and location techniques, and transient luminous events above thunderstorms. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
41. Mesoscale dynamics and its application in torrential rainfall systems in China.
- Author
-
Gao, Shouting, Tan, Zhemin, Zhao, Sixiong, Luo, Zhexian, Lu, Hancheng, Wang, Donghai, Cui, Chunguang, Cui, Xiaopeng, and Sun, Jianhua
- Subjects
ATMOSPHERIC circulation ,MESOCLIMATOLOGY ,RAINFALL ,RAINSTORMS ,HUMIDITY ,TOPOGRAPHY - Abstract
Progress over the past decade in understanding moisture-driven dynamics and torrential rain storms in China is reviewed in this paper. First, advances in incorporating moisture effects more realistically into theory are described, including the development of a new parameter, generalized moist potential vorticity (GMPV) and an improved moist ageostrophic Q vector ( Q). Advances in vorticity dynamics are also described, including the adoption of a 'parcel dynamic' approach to investigate the development of the vertical vorticity of an air parcel; a novel theory of slantwise vorticity development, proposed because vorticity develops easily near steep isentropic surfaces; and the development of the convective vorticity vector (CVV) as an effective new tool. The significant progress in both frontal dynamics and wave dynamics is also summarized, including the geostrophic adjustment of initial unbalanced flow and the dual role of boundary layer friction in frontogenesis, as well as the interaction between topography and fronts, which indicate that topographic perturbations alter both frontogenesis and frontal structure. For atmospheric vortices, mixed wave/vortex dynamics has been extended to explain the propagation of spiral rainbands and the development of dynamical instability in tropical cyclones. Finally, we review wave and basic flow interaction in torrential rainfall, for which it was necessary to extend existing theory from large-scale flows to mesoscale fields, enriching our knowledge of mesoscale atmospheric dynamics. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
42. Paleoclimate modeling in China: A review.
- Author
-
Jiang, Dabang, Yu, Ge, Zhao, Ping, Chen, Xing, Liu, Jian, Liu, Xiaodong, Wang, Shaowu, Zhang, Zhongshi, Yu, Yongqiang, Li, Yuefeng, Jin, Liya, Xu, Ying, Ju, Lixia, Zhou, Tianjun, and Yan, Xiaodong
- Subjects
PALEOCLIMATOLOGY ,ATMOSPHERIC models ,ATMOSPHERIC temperature ,CLIMATE change ,SOLAR radiation ,COMPUTER simulation - Abstract
This paper provides a review of paleoclimate modeling activities in China. Rather than attempt to cover all topics, we have chosen a few climatic intervals and events judged to be particularly informative to the international community. In historical climate simulations, changes in solar radiation and volcanic activity explain most parts of reconstructions over the last millennium prior to the industrial era, while atmospheric greenhouse gas concentrations play the most important role in the 20th century warming over China. There is a considerable model-data mismatch in the annual and boreal winter temperature change over China during the mid-Holocene [6000 years before present (ka BP)], while coupled models with an interactive ocean generally perform better than atmospheric models. For the Last Glacial Maximum (21 ka BP), climate models successfully reproduce the surface cooling trend over China but fail to reproduce its magnitude, with a better performance for coupled models. At that time, reconstructed vegetation and western Pacific sea surface temperatures could have significantly affected the East Asian climate, and environmental conditions on the Qinghai-Tibetan Plateau were most likely very different to the present day. During the late Marine Isotope Stage 3 (30-40 ka BP), orbital forcing and Northern Hemisphere glaciation, as well as vegetation change in China, were likely responsible for East Asian climate change. On the tectonic scale, the Qinghai-Tibetan Plateau uplift, the Tethys Sea retreat, and the South China Sea expansion played important roles in the formation of the East Asian monsoon-dominant environment pattern during the late Cenozoic. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
43. An Extreme Gale Event in East China under the Arctic Potential Vorticity Anomaly through the Northeast China Cold Vortex.
- Author
-
Tao, Wei, Zheng, Linlin, Hao, Ying, and Liu, Gaoping
- Subjects
VERTICAL wind shear ,WINDSTORMS ,CLIMATE change forecasts ,VORTEX motion ,WEATHER forecasting - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
44. A Statistical Linkage between Extreme Cold Wave Events in Southern China and Sea Ice Extent in the Barents-Kara Seas from 1289 to 2017.
- Author
-
Xiao, Cunde, Zhang, Qi, Yang, Jiao, Du, Zhiheng, Ding, Minghu, Dou, Tingfeng, and Luo, Binhe
- Subjects
SEA ice ,ROGUE waves ,NORTH Atlantic oscillation ,WEATHER & climate change ,GLOBAL warming ,AUTUMN - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
45. The Relationship between Model Biases in East Asian Summer Monsoon Rainfall and Land Evaporation.
- Author
-
Geen, Ruth, Pietschnig, Marianne, Agrawal, Shubhi, Dey, Dipanjan, Lambert, F. Hugo, and Vallis, Geoffrey K.
- Subjects
OCEAN temperature ,HYDROLOGIC cycle ,ATMOSPHERIC models ,MONSOONS ,RAINFALL ,EVAPOTRANSPIRATION - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
46. Evaluation of the Predicted Particle Properties (P3) Microphysics Scheme in Simulations of Stratiform Clouds with Embedded Convection.
- Author
-
Hou, Tuanjie, Chen, Baojun, Lei, Hengchi, Wei, Lei, He, Youjiang, and Feng, Qiujuan
- Subjects
STRATUS clouds ,METEOROLOGICAL research ,ICE clouds ,WEATHER forecasting ,MICROPHYSICS ,CLOUD droplets - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
47. Near Homogeneous Microphysics of the Record-Breaking 2020 Summer Monsoon Rainfall during the Northward Migration over East China.
- Author
-
Wen, Long, Zhang, Wei, Yang, Cha, Chen, Gang, Hu, Yajun, and Zhang, Hao
- Subjects
RAINDROP size ,MICROPHYSICS ,MONSOONS ,EMERGENCY management ,RAINFALL ,HAZARD mitigation - Abstract
Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
48. Preface to the Special Issue on the 'Observation, Prediction and Analysis of severe Convection of China' (OPACC) National '973' Projec.
- Author
-
Xue, Ming
- Subjects
CONVECTIVE clouds ,THUNDERSTORMS ,TORNADOES ,MICROBURSTS ,HAIL ,MESOCLIMATOLOGY - Abstract
The article focuses on the severe convective weather of China, which refers to intense local heavy precipitation, thunderstorm-induced gale-force winds including those from tornadoes and downbursts, and hail and lightning. The article mentions that the severe convective weather occurs at the smaller meso-γ scale and within organised meso-β scale convective systems. It also discusses a project named "Observation, Prediction and Analysis of severe Convection of China" (OPACC).
- Published
- 2016
- Full Text
- View/download PDF
49. Development and preliminary evaluation of a double-cell ozonesonde.
- Author
-
Zhang, Jinqiang, Xuan, Yuejian, Yan, Xiaolu, Liu, Mingyuan, Tian, Hongmin, Xia, Xiang'ao, Pang, Li, and Zheng, Xiangdong
- Subjects
OZONESONDES ,UPPER atmosphere ,GLOBAL Positioning System ,ELECTROCHEMISTRY ,ATMOSPHERIC ozone - Abstract
Ozonesondes are widely used to obtain ozone concentration profiles from the surface to the upper atmosphere. A kind of double-cell ozonesonde has been developed at the Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (named the 'IAP ozonesonde') based on previous experience over the past 20 years of developing the singlecell GPSO3 ozonesonde. The IAP ozonesonde is of the Electrochemical Concentration Cell (ECC) type. A detailed description of the IAP ozonesonde is firstly provided in the present paper, followed by a presentation of results from a series of launches carried out to evaluate its performance. The analysis involved comparing its observations with measurements from the GPSO3 and ECC ozonesondes (Model type ENSCI-Z) as well as a Brewer spectrophotometer. The results showed that the IAP ozonesonde is a vast improvement over the GPSO3 ozonesonde, able to capture vertical ozone structures very well and in good agreement with ECC ozonesonde measurements. The average difference in the ozone partial pressure between the IAP and ECC ozonesondes was 0.3 mPa from the surface to 2.5 km, close to zero from 2.5 to 9 km and generally less than 1 mPa for layers higher than 9 km. The apparent deviation is likely caused by a decreasing pump flow rate in the IAP ozonesonde which needs further improvement. The total ozone amounts measured by the IAP ozonesonde profiles were highly comparable with the Brewer data with a relative difference of 6%. The development of the IAP ozonesonde and its strong performance will surely accelerate the process of conventional observations of ozone profiles over China in the near future as well as provide more data for ozone research in general. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
50. Improvement of the semi-Lagrangian advection scheme in the GRAPES model: Theoretical analysis and idealized tests.
- Author
-
Huang, Bo, Chen, Dehui, Li, Xingliang, and Li, Chao
- Subjects
NUMERICAL weather forecasting ,ADVECTION-diffusion equations ,LAGRANGIAN functions ,INTERPOLATION ,METEOROLOGY - Abstract
The Global/Regional Assimilation and PrEdiction System (GRAPES) is the new-generation numerical weather prediction (NWP) system developed by the China Meteorological Administration. It is a fully compressible non-hydrostatical global/regional unified model that uses a traditional semi-Lagrangian advection scheme with cubic Lagrangian interpolation (referred to as the SL_CL scheme). The SL_CL scheme has been used in many operational NWP models, but there are still some deficiencies, such as the damping effects due to the interpolation and the relatively low accuracy. Based on Reich's semi-Lagrangian advection scheme (referred to as the R2007 scheme), the Re_R2007 scheme that uses the low- and high-order B-spline function for interpolation at the departure point, is developed in this paper. One- and two-dimensional idealized tests in the rectangular coordinate system with uniform grid cells were conducted to compare the Re_R2007 scheme and the SL_CL scheme. The numerical results showed that: (1) the damping effects were remarkably reduced with the Re_R2007 scheme; and (2) the normalized errors of the Re_R2007 scheme were about 7.5 and 3 times smaller than those of the SL_CL scheme in one- and two-dimensional tests, respectively, indicating the higher accuracy of the Re_R2007 scheme. Furthermore, two solid-body rotation tests were conducted in the latitude-longitude spherical coordinate system with nonuniform grid cells, which also verified the Re_R2007 scheme's advantages. Finally, in comparison with other global advection schemes, the Re_R2007 scheme was competitive in terms of accuracy and flow independence. An encouraging possibility for the application of the Re_R2007 scheme to the GRAPES model is provided. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
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