气候变化领域集成服务门户(CCPortal): Changes in soil moisture persistence in China over the Past 40 years under a warming climate

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DOI	10.1175/JCLI-D-19-0900.1
	Changes in soil moisture persistence in China over the Past 40 years under a warming climate
	Li M.; Wu P.; Ma Z.; Lv M.; Yang Q.
发表日期	2020
ISSN	0894-8755
起始页码	9531
结束页码	9550
卷号	33 期号:22
英文摘要	Variability in soil moisture has implications for regional terrestrial environments under a warming climate. This paper focuses on the spatiotemporal variability in the intra-annual persistence of soil moisture in China using the fifthgeneration reanalysis dataset by the European Centre for Medium-Range Weather Forecasts for the period 1979-2018. The results show that in China, the mean intra-annual persistence in the humid to arid zones increased from 60 to 115 days in the lower layer but decreased from 19 to 13 days and from 25 to 14 days in the upper and root layers, respectively. However, these changes were strongly attenuated in extremely dry and wet regions due to the scarcity of soil moisture anomalies. Large changes in persistence occurred in the lower soil layer in dryland areas, with a mean difference of up to 40 days between the 2010s and the 1980s. Overall increasing trends dominated the large-scale spatial features, despite regional decreases in the eastern arid zone and the North and Northeast China plains. In the root layer, the two plains experienced an expanded decrease while on the Tibetan Plateau it was dominated by decadal variability. These contrasting changes between the lower and root layers along the periphery of the transition zone was a reflection of the enhanced soil hydrological cycle in the root layer. The enhanced persistence in drylands lower layer is an indication of the intensified impacts of soil moisture anomalies (e.g., droughts) on terrestrial water cycle. These findings may help the understanding of climate change impacts on terrestrial environments. © 2020 American Meteorological Society.
英文关键词	Arid regions; Soil moisture; Weather forecasting; Climate change impact; Decadal variability; European centre for medium-range weather forecasts; Soil hydrological; Spatial features; Spatiotemporal variability; Terrestrial environments; Transition zones; Climate change; climate change; climate variation; data assimilation; decadal variation; global warming; hydrological cycle; hydrological modeling; land surface; soil moisture; weather forecasting; China
语种	英语
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/171007
作者单位	Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Met Office Hadley Centre, Exeter, United Kingdom; University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Li M.,Wu P.,Ma Z.,et al. Changes in soil moisture persistence in China over the Past 40 years under a warming climate[J],2020,33(22).
APA	Li M.,Wu P.,Ma Z.,Lv M.,&Yang Q..(2020).Changes in soil moisture persistence in China over the Past 40 years under a warming climate.Journal of Climate,33(22).
MLA	Li M.,et al."Changes in soil moisture persistence in China over the Past 40 years under a warming climate".Journal of Climate 33.22(2020).