Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China

Abstract ERA5 is the latest fifth-generation reanalysis global atmosphere dataset from the European Centre for Medium-Range Weather Forecasts, replacing ERA-Interim as the next generation of representative satellite-observational data on the global scale. ERA5 data have been evaluated and applied in...

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Autores principales:	Donglai Jiao, Nannan Xu, Fan Yang, Ke Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2fb9cd630950412db7d9de47ce25c2e5
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id	oai:doaj.org-article:2fb9cd630950412db7d9de47ce25c2e5
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spelling	oai:doaj.org-article:2fb9cd630950412db7d9de47ce25c2e52021-12-02T17:41:18ZEvaluation of spatial-temporal variation performance of ERA5 precipitation data in China10.1038/s41598-021-97432-y2045-2322https://doaj.org/article/2fb9cd630950412db7d9de47ce25c2e52021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97432-yhttps://doaj.org/toc/2045-2322Abstract ERA5 is the latest fifth-generation reanalysis global atmosphere dataset from the European Centre for Medium-Range Weather Forecasts, replacing ERA-Interim as the next generation of representative satellite-observational data on the global scale. ERA5 data have been evaluated and applied in different regions, but the performances are inconsistent. Meanwhile, there are few precise evaluations of ERA5 precipitation data over long time series have been performed in Chinese mainland. This study evaluates the temporal-spatial performance of ERA5 precipitation data from 1979 to 2018 based on gridded-ground meteorological station observational data across China. The results showed that ERA5 data could capture the annual and seasonal patterns of observed precipitation in China well, with correlation coefficient values ranging from 0.796 to 0.945, but ERA5 slightly overestimated precipitation in the summer. Nonetheless, the results also showed that the accuracy of the precipitation products was strongly correlated with topographic distribution and climatic divisions. The performance of ERA5 shows spatial inherently across China that the highest correlation coefficient values locate in eastern, Northwestern and North China and the lowest biases locate in Southeast China. This study provides a reliable data assessment of the ERA5 data and precipitation trend analyses in China. The results provide accuracy references for the further use of precipitation satellite data for hydrological calculations and climate numerical simulations.Donglai JiaoNannan XuFan YangKe XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Donglai Jiao Nannan Xu Fan Yang Ke Xu Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China
description	Abstract ERA5 is the latest fifth-generation reanalysis global atmosphere dataset from the European Centre for Medium-Range Weather Forecasts, replacing ERA-Interim as the next generation of representative satellite-observational data on the global scale. ERA5 data have been evaluated and applied in different regions, but the performances are inconsistent. Meanwhile, there are few precise evaluations of ERA5 precipitation data over long time series have been performed in Chinese mainland. This study evaluates the temporal-spatial performance of ERA5 precipitation data from 1979 to 2018 based on gridded-ground meteorological station observational data across China. The results showed that ERA5 data could capture the annual and seasonal patterns of observed precipitation in China well, with correlation coefficient values ranging from 0.796 to 0.945, but ERA5 slightly overestimated precipitation in the summer. Nonetheless, the results also showed that the accuracy of the precipitation products was strongly correlated with topographic distribution and climatic divisions. The performance of ERA5 shows spatial inherently across China that the highest correlation coefficient values locate in eastern, Northwestern and North China and the lowest biases locate in Southeast China. This study provides a reliable data assessment of the ERA5 data and precipitation trend analyses in China. The results provide accuracy references for the further use of precipitation satellite data for hydrological calculations and climate numerical simulations.
format	article
author	Donglai Jiao Nannan Xu Fan Yang Ke Xu
author_facet	Donglai Jiao Nannan Xu Fan Yang Ke Xu
author_sort	Donglai Jiao
title	Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China
title_short	Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China
title_full	Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China
title_fullStr	Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China
title_full_unstemmed	Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China
title_sort	evaluation of spatial-temporal variation performance of era5 precipitation data in china
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2fb9cd630950412db7d9de47ce25c2e5
work_keys_str_mv	AT donglaijiao evaluationofspatialtemporalvariationperformanceofera5precipitationdatainchina AT nannanxu evaluationofspatialtemporalvariationperformanceofera5precipitationdatainchina AT fanyang evaluationofspatialtemporalvariationperformanceofera5precipitationdatainchina AT kexu evaluationofspatialtemporalvariationperformanceofera5precipitationdatainchina
_version_	1718379695927459840

Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China

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