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Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China.
- Source :
- Advances in Meteorology; 4/10/2020, p1-11, 11p
- Publication Year :
- 2020
-
Abstract
- In this study, 2 m air temperature data from 24 meteorological stations in the Qilian Mountains (QLM) are examined to evaluate ERA-Interim reanalysis temperature data derived from the European Centre for Medium-Range Weather Forecasts (ECMWF) for the period of 1979–2017. ERA-Interim generally captures the monthly, seasonal, and annual variation very well. High daily correlations ranging from 0.956 to 0.996 indicate that ERA-Interim captures the daily temperature observations very well. However, an average root-mean-square error (RMSE) of ±2.7°C of all stations reveals that ERA-Interim should not be directly applied at individual sites. The biases are mainly attributed to the altitude differences between ERA-Interim grid points and stations. The positive trend (0.457°C/decade) is significant over the Qilian Mountains based on the 1979–2017 observations. ERA-Interim captures the warming trend very well with an increase rate of 0.384°C/decade. The observations and ERA-Interim both show the largest positive trends in summer with the values of 0.552°C/decade and 0.481°C/decade, respectively. We conclude that in general ERA-Interim captures the trend very well for observed 2 m air temperatures and ERA-Interim is generally reliable for climate change research over the Qilian Mountains. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16879309
- Database :
- Complementary Index
- Journal :
- Advances in Meteorology
- Publication Type :
- Academic Journal
- Accession number :
- 142666816
- Full Text :
- https://doi.org/10.1155/2020/7353482