气候变化领域集成服务门户(CCPortal): Temporal changes in land surface coupling strength: An example in a semi-arid region of Australia

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DOI	10.1175/JCLI-D-20-0250.1
	Temporal changes in land surface coupling strength: An example in a semi-arid region of Australia
	Lo M.-H.; Wu W.-Y.; Tang L.I.; Ryu D.; Rashid M.; Wu R.-J.
发表日期	2021
ISSN	08948755
起始页码	1503
结束页码	1513
卷号	34 期号:4
英文摘要	One of the critical components in understanding the climate system is the interaction between the land and the atmosphere. Whereas previous studies on land–atmosphere coupling mostly focus on its spatial hotspots, we explore the temporal evolution of land surface coupling strength (LCS) during a large-scale flood event in a semiarid region in northern Australia. The LCS indicates the relationship between soil moisture and latent heat flux, and the spatiotemporal variability in precipitation and soil water strongly affects the variability of LCS. The LCS is usually positive in the semiarid climate, where evapotranspiration (ET) occurs under the soil moisture–limited regime and thus increases with soil moisture. However, our analyses of combined land surface modeling and observational datasets show high temporal variability of LCS in the course of the extreme flood event followed by a drying period. The wet regions transferred the ET regime from the soil moisture–limited to the transition section, weakening the linear growth of ET with soil moisture, which resulted in the decline of LCS. The LCS remained weak until the flood retreated and the soil water approached the prestorm average state. Such temporal variation of the LCS has important implications for realistic parameterization of the land–atmosphere coupling and consequently improving subseasonal to seasonal climate forecast. Ó 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Atmosphere-land interaction; Australia; Evapotranspiration; Flood events
语种	英语
scopus关键词	Arid regions; Floods; Heat flux; Surface measurement; American meteorological societies; Copyright informations; Extreme flood events; Land surface modeling; Seasonal climate forecast; Spatiotemporal variability; Temporal variability; Transition sections; Soil moisture; coupling; evapotranspiration; latent heat flux; parameterization; semiarid region; soil moisture; temporal analysis; Australia
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178627
作者单位	Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan; Melbourne School of Engineering, University of MelbourneVIC, Australia
推荐引用方式 GB/T 7714	Lo M.-H.,Wu W.-Y.,Tang L.I.,et al. Temporal changes in land surface coupling strength: An example in a semi-arid region of Australia[J],2021,34(4).
APA	Lo M.-H.,Wu W.-Y.,Tang L.I.,Ryu D.,Rashid M.,&Wu R.-J..(2021).Temporal changes in land surface coupling strength: An example in a semi-arid region of Australia.Journal of Climate,34(4).
MLA	Lo M.-H.,et al."Temporal changes in land surface coupling strength: An example in a semi-arid region of Australia".Journal of Climate 34.4(2021).