干旱区生态环境知识资源中心(Arid): Does ERA5-land capture the changes in the terrestrial hydrological cycle across the globe?

Arid

DOI	10.1088/1748-9326/ad1d3a
	Does ERA5-land capture the changes in the terrestrial hydrological cycle across the globe?
	Dutta, Riya; Markonis, Yannis
通讯作者	Dutta, R
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2024
卷号	19 期号:2
英文摘要	Changes in the terrestrial hydrological cycle determine the future water availability across the globe with profound impacts in different facets of society. Precise estimation of such changes is vital for the effective implementation of water management policies. Among the numerous data products that describe the hydrological cycle components, ERA5-Land is one of the most increasingly used dataset. Still, there has been no assessment of its ability capacity to represent the water cycle shifts variability over land. This study endeavors to bridge this gap by comparing the magnitude and direction of change in precipitation minus evaporation (P-E) and runoff, as estimated globally by the ERA5-Land data product. Our findings reveal significant inconsistencies in the changes identified, with the climatological mean of P-E decreasing more substantially than runoff for numerous regions. Consequently, ERA5 presents a declining water availability for most of the regions, but the magnitude of change is incompatible to the change between P-E and runoff. To further validate, the estimates provided by the ERA5-Land product, two different hydrologic models (TerraClimate and Global Land Data Assimilation System, GLDAS-Noah) are also utilized. TerraClimate demonstrates a more reasonable alignment between changes in P-E and runoff, followed by GLDAS-Noah, particularly for the arid regions lying in the parts of Northern Africa and Southern Asia, the European continent, and the northern parts of Asia. Inconsistencies remain high for the tropical regions for both data products. Still, the estimates of change in water availability are better represented by the hydrologic model-based data sources for most parts of the globe, especially for the regions with low precipitation, such as the regions with arid and continental climates. Our results imply that ERA5-Land should be used with extreme caution when assessing the long-term changes in the terrestrial water cycle. Additionally, pinpointing the regions of the highest bias can help to improve the hydrological coupling of ERA5-Land in future versions of the reanalysis.
英文关键词	water availability water cycle fluxes ERA5-Land TerraClimate GLDAS-Noah hydroclimatic change
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001157445900001
WOS关键词	WATER AVAILABILITY ; CLIMATE ; ERA5 ; REANALYSIS ; COSMO-REA6
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403639
推荐引用方式 GB/T 7714	Dutta, Riya,Markonis, Yannis. Does ERA5-land capture the changes in the terrestrial hydrological cycle across the globe?[J],2024,19(2).
APA	Dutta, Riya,&Markonis, Yannis.(2024).Does ERA5-land capture the changes in the terrestrial hydrological cycle across the globe?.ENVIRONMENTAL RESEARCH LETTERS,19(2).
MLA	Dutta, Riya,et al."Does ERA5-land capture the changes in the terrestrial hydrological cycle across the globe?".ENVIRONMENTAL RESEARCH LETTERS 19.2(2024).