IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2014  > Vol11 No.5
Evaluation of ERA-Interim Monthly Temperature Data over the Tibetan Plateau
GAO Lu; HAO Lu; CHEN Xing-wei
Corresponding AuthorGAO Lu
Source PublicationJournal of Mountain Science
AbstractIn this study, surface air temperature from 75 meteorological stations above 3000 m on the Tibetan Plateau are applied for evaluation of the European Centre for Medium-Range Weather Forecasts (ECMWF) third-generation reanalysis product ERA-Interim in the period of 1979-2010. High correlations ranging from 0.973 to 0.999 indicate that ERA-Interim could capture the annual cycle very well. However, an average root-mean-square error (rmse) of 3.7°C for all stations reveals that ERA-Interim could not be applied directly for the individual sites. The biases can be mainly attributed to the altitude differences between ERA-Interim grid points and stations. An elevation correction method based on monthly lapse rates is limited to reduce the bias for all stations. Generally, ERA-Interim captured the Plateau-Wide annual and seasonal climatologies very well. The spatial variance is highly related to the topographic features of the TP. The temperature increases significantly (10°C - 15°C) from the western to the eastern Tibetan Plateau for all seasons, in particular during winter and summer. A significant warming trend (0.49°C/decade) is found over the entire Tibetan Plateau using station time series from 1979-2010. ERA-Interim captures the annual warming trend with an increase rate of 0.33°C /decade very well. The observation data and ERA-Interim data both showed the largest warming trends in winter with values of 0.67°C/decade and 0.41°C/decade, respectively. We conclude that in general ERA-Interim captures the temperature trends very well and ERA-Interim is reliable for climate change investigation over the Tibetan Plateau under the premise of cautious interpretation.
KeywordReanalysis Air Temperature Warming Trend Tibetan Plateau
Indexed BySCI
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.5
Corresponding AuthorGAO Lu
Recommended Citation
GB/T 7714
GAO Lu,HAO Lu,CHEN Xing-wei. Evaluation of ERA-Interim Monthly Temperature Data over the Tibetan Plateau[J]. Journal of Mountain Science,2014,11(5):1154-1168.
APA GAO Lu,HAO Lu,&CHEN Xing-wei.(2014).Evaluation of ERA-Interim Monthly Temperature Data over the Tibetan Plateau.Journal of Mountain Science,11(5),1154-1168.
MLA GAO Lu,et al."Evaluation of ERA-Interim Monthly Temperature Data over the Tibetan Plateau".Journal of Mountain Science 11.5(2014):1154-1168.
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