数字农科院2.0

Evaluation Of Cldas And Gldas Datasets For Near-Surface Air Temperature Over Major Land Areas Of China

文献类型： 外文期刊

作者： 韩帅;;刘布春;;师春香;;刘园;;邱美娟;;孙帅

作者机构：

关键词： Near-Surface Air Temperature; Land Data Assimilation; Cldas; Gldas; Evaluation

期刊名称： SUSTAINABILITY

ISSN：

年卷期： 2020 年 12 卷 10 期

页码：

收录情况： JCR（2021版）

摘要： As one of the most principal meteorological factors to affect global climate change and human sustainable development, temperature plays an important role in biogeochemical and hydrosphere cycle. To date, there are a wide range of temperature data sources and only a detailed understanding of the reliability of these datasets can help us carry out related research. In this study, the hourly and daily near-surface air temperature observations collected at national automatic weather stations (NAWS) in China were used to compare with the China Meteorological Administration (CMA) Land Data Assimilation System (CLDAS) and the Global Land Data Assimilation System (GLDAS), both of which were developed by using the advanced multi-source data fusion technology. Results are as follows. (1) The spatial and temporal variations of the near-surface air temperature agree well between CLDAS and GLDAS over major land of China, except that spatial details in high mountainous areas were not sufficiently displayed in GLDAS; (2) The near-surface air temperature of CLDAS were more significantly correlated with observations than that of GLDAS, but more caution is necessary when using the data in mountain areas as the accuracy of the datasets gradually decreases with increasing altitude; (3) CLDAS can better illustrate the distribution of areas of daily maximum above 35 degrees C and help to monitor high temperature weather. The main conclusion of this study is that CLDAS near-surface air temperature has a higher reliability in China, which is very important for the study of climate change and sustainable development in East Asia.

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