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31 results on '"Zhu, Qiu'an"'

5. Methane emissions respond to soil temperature in convergent patterns but divergent sensitivities across wetlands along altitude

Author

Zhu, Dan, primary, Wu, Ning, additional, Bhattarai, Nabin, additional, Oli, Krishna Prasad, additional, Chen, Huai, additional, Rawat, Gopal Singh, additional, Rashid, Irfan, additional, Dhakal, Maheshwar, additional, Joshi, Srijana, additional, Tian, Jianqing, additional, Zhu, Qiu’an, additional, Chaudhary, Sunita, additional, and Tshering, Kuenzang, additional

Published
2020
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8. Methane emissions respond to soil temperature in convergent patterns but divergent sensitivities across wetlands along altitude.

Author

Zhu, Dan, Wu, Ning, Bhattarai, Nabin, Oli, Krishna Prasad, Chen, Huai, Rawat, Gopal Singh, Rashid, Irfan, Dhakal, Maheshwar, Joshi, Srijana, Tian, Jianqing, Zhu, Qiu'an, Chaudhary, Sunita, and Tshering, Kuenzang

Subjects
SOIL temperature, WETLAND soils, WETLANDS, METHANE, CLIMATIC zones, ALTITUDES
Abstract

Among the global coordinated patterns in soil temperature and methane emission from wetlands, a declining trend of optimal soil temperature for methane emissions from low to high latitudes has been witnessed, while the corresponding trend along the altitudinal gradient has not yet been investigated. We therefore selected two natural wetlands located at contrasting climatic zones from foothill and mountainside of Nepal Himalayas, to test: (1) whether the optimal temperature for methane emissions decreases from low to high altitude, and (2) whether there is a difference in temperature sensitivity of methane emissions from those wetlands. We found significant spatial and temporal variation of methane emissions between the two wetlands and seasons. Soil temperature was the dominant driver for seasonal variation in methane emissions from both wetlands, though its effect was perplexed by the level of standing water, aquatic plants, and dissolved organic carbon, particularly in the deep water area. When integrative comparison was conducted by adding the existing data from wetlands of diverse altitudes, and the latitude‐for‐altitude effect was taken into account, we found the baseline soil temperatures decrease whilst the altitude rises with respect to a rapid increase in methane emission from all wetlands, however, remarkably higher sensitivity of methane emissions to soil temperature (apparent Q10) was found in mid‐altitude wetland. We provide the first evidence of an apparent decline in optimal temperature for methane emissions with increasing elevation. These findings suggest a convergent pattern of methane emissions with respect to seasonal temperature shifts from wetlands along altitudinal gradient, while a divergent pattern in temperature sensitivities exhibits a single peak in mid‐altitude. [ABSTRACT FROM AUTHOR]

Published
2021
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13. The analysis of snow information from 1979 to 2007 in Qinghai-Tibetan Plateau

Author

张尧 Zhang Yao, 彭长辉 Peng Changhui, 田立军 Tian Lijun, 田柳茜 Tian Liuxi, 李卫忠 Li Weizhong, 朱求安 Zhu Qiu'an, and 陈槐 Chen Huai

Subjects
Qinghai tibetan plateau, Ecology, Snow field, Physical geography, Snow, Ecology, Evolution, Behavior and Systematics, Geology
Published
2014

14. The 5000-year climate change of northeastern Qinghai-Tibetan Plateau and historical ecology of Zoige wetlands

Author

杨刚 Yang Gang, 陈槐 Chen Huai, 彭长辉 Peng Changhui, 赵川 Zhao Chuan, 何奕忻 He Yixin, 朱单 Zhu Dan, 高永恒 Gao Yongheng, 吴宁 Wu Ning, and 朱求安 Zhu Qiu'an

Subjects
Qinghai tibetan plateau, geography, geography.geographical_feature_category, Ecology, Climate change, Wetland, Physical geography, Historical ecology, Ecology, Evolution, Behavior and Systematics
Published
2014

30. Methane emissions from rice paddies natural wetlands, lakes in China: synthesis new estimate.

Author

Chen, Huai, Zhu, Qiu'an, Peng, Changhui, Wu, Ning, Wang, Yanfen, Fang, Xiuqin, Jiang, Hong, Xiang, Wenhua, Chang, Jie, Deng, Xiangwen, and Yu, Guirui

Subjects
*METHANE, *EMISSIONS (Air pollution), *WETLANDS, *GLOBAL environmental change, *BIOLOGY
Abstract

Sources of methane ( CH4) become highly variable for countries undergoing a heightened period of development due to both human activity and climate change. An urgent need therefore exists to budget key sources of CH4, such as wetlands (rice paddies and natural wetlands) and lakes (including reservoirs and ponds), which are sensitive to these changes. For this study, references in relation to CH4 emissions from rice paddies, natural wetlands, and lakes in China were first reviewed and then reestimated based on the review itself. Total emissions from the three CH4 sources were 11.25 Tg CH4 yr−1 (ranging from 7.98 to 15.16 Tg CH4 yr−1). Among the emissions, 8.11 Tg CH4 yr−1 (ranging from 5.20 to 11.36 Tg CH4 yr−1) derived from rice paddies, 2.69 Tg CH4 yr−1 (ranging from 2.46 to 3.20 Tg CH4 yr−1) from natural wetlands, and 0.46 Tg CH4 yr−1 (ranging from 0.33 to 0.59 Tg CH4 yr−1) from lakes (including reservoirs and ponds). Plentiful water and warm conditions, as well as its large rice paddy area make rice paddies in southeastern China the greatest overall source of CH4, accounting for approximately 55% of total paddy emissions. Natural wetland estimates were slightly higher than the other estimates owing to the higher CH4 emissions recorded within Qinghai- Tibetan Plateau peatlands. Total CH4 emissions from lakes were estimated for the first time by this study, with three quarters from the littoral zone and one quarter from lake surfaces. Rice paddies, natural wetlands, and lakes are not constant sources of CH4, but decreasing ones influenced by anthropogenic activity and climate change. A new progress-based model used in conjunction with more observations through model-data fusion approach could help obtain better estimates and insights with regard to CH4 emissions deriving from wetlands and lakes in China. [ABSTRACT FROM AUTHOR]

Published
2013
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31. Methane emissions respond to soil temperature in convergent patterns but divergent sensitivities across wetlands along altitude

Author

<p>The Second Tibetan Plateau Scientific Expedition. National Natural Science Foundation of China International Centre for Integrated Mountain Development Sichuan Science and Technology Program</p>, Zhu, Dan, Wu, Ning, Bhattarai, Nabin, Oli, Krishna Prasad, Chen, Huai, Rawat, Gopal Singh, Rashid, Irfan, Dhakal, Maheshwar, Joshi, Srijana, Tian, Jianqing, Zhu, Qiu’an, Chaudhary, Sunita, Tshering, Kuenzang, <p>The Second Tibetan Plateau Scientific Expedition. National Natural Science Foundation of China International Centre for Integrated Mountain Development Sichuan Science and Technology Program</p>, Zhu, Dan, Wu, Ning, Bhattarai, Nabin, Oli, Krishna Prasad, Chen, Huai, Rawat, Gopal Singh, Rashid, Irfan, Dhakal, Maheshwar, Joshi, Srijana, Tian, Jianqing, Zhu, Qiu’an, Chaudhary, Sunita, and Tshering, Kuenzang

Abstract

Zhu, D., Wu, N., Bhattarai, N., Oli, K. P., Chen, H., Rawat, G. S., ... Tshering, K. (2021). Methane emissions respond to soil temperature in convergent patterns but divergent sensitivities across wetlands along altitude. Global Change Biology, 27(4), 941-955. https://doi.org/10.1111/gcb.15454

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