Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China
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 captur...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2020/7353482 |
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| author | Peng Zhao Lu Gao Jianhui Wei Miaomiao Ma Haijun Deng Jianyun Gao Xingwei Chen |
| author_facet | Peng Zhao Lu Gao Jianhui Wei Miaomiao Ma Haijun Deng Jianyun Gao Xingwei Chen |
| author_sort | Peng Zhao |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-74effa9d397642df93b154d419ff3f50 |
| institution | OA Journals |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-74effa9d397642df93b154d419ff3f502025-08-20T02:07:27ZengWileyAdvances in Meteorology1687-93091687-93172020-01-01202010.1155/2020/73534827353482Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of ChinaPeng Zhao0Lu Gao1Jianhui Wei2Miaomiao Ma3Haijun Deng4Jianyun Gao5Xingwei Chen6College of Geographical Science, Fujian Normal University, Fuzhou 350007, ChinaCollege of Geographical Science, Fujian Normal University, Fuzhou 350007, ChinaInstitute of Meteorological and Climate Research, Karlsruhe Institute of Technology, Campus Alpine, Garmisch-Partenkirchen 82467, GermanyChina Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaCollege of Geographical Science, Fujian Normal University, Fuzhou 350007, ChinaFujian Key Laboratory of Severe Weather, Fuzhou 350001, ChinaCollege of Geographical Science, Fujian Normal University, Fuzhou 350007, ChinaIn 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.http://dx.doi.org/10.1155/2020/7353482 |
| spellingShingle | Peng Zhao Lu Gao Jianhui Wei Miaomiao Ma Haijun Deng Jianyun Gao Xingwei Chen Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China Advances in Meteorology |
| title | Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China |
| title_full | Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China |
| title_fullStr | Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China |
| title_full_unstemmed | Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China |
| title_short | Evaluation of ERA-Interim Air Temperature Data over the Qilian Mountains of China |
| title_sort | evaluation of era interim air temperature data over the qilian mountains of china |
| url | http://dx.doi.org/10.1155/2020/7353482 |
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