气候变化领域集成服务门户(CCPortal): Increased Likelihood of Appreciable Afternoon Rainfall Over Wetter or Drier Soils Dependent Upon Atmospheric Dynamic Influence

CCPortal

DOI	10.1029/2020GL087779
	Increased Likelihood of Appreciable Afternoon Rainfall Over Wetter or Drier Soils Dependent Upon Atmospheric Dynamic Influence
	Welty J.; Stillman S.; Zeng X.; Santanello J.; Jr.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	The relationship between morning soil moisture and afternoon rainfall persists as an important yet unresolved challenge in land-atmosphere interaction study, complicated in part by atmospheric influence. Here, we address this relationship by utilizing NASA's satellite soil moisture and precipitation data for the warm season (June–September) of 2015–2019 over Northern Hemisphere land (0–60°N). Raining days are partitioned into low, medium, and high regimes of atmospheric water vapor convergence. Under the low convergence regime, afternoon rainfall is more likely to occur over wetter soils or higher relative humidity; for days with high moisture convergence, occurrence favors drier soils or lower relative humidity. For each regime, afternoon rainfall occurrence favors warmer morning soil or air temperature. These conclusions are not affected by the threshold magnitude utilized to identify afternoon rainfall events by accumulation, but the threshold value does affect the soil moisture (or relative humidity)-precipitation relationship when convergence regimes are not considered. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	NASA; Rain; Soil moisture; Atmospheric dynamics; Atmospheric water vapor; Higher relative humidity; Land atmosphere interaction; Northern Hemispheres; Precipitation data; Precipitation relationships; Satellite soil moisture; Atmospheric humidity; air temperature; atmospheric moisture; convergence; land-atmosphere interaction; moisture content; Northern Hemisphere; rainfall; relative humidity; satellite data; soil moisture; water vapor
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170286
作者单位	Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Desert Research Institute, Las Vegas, NV, United States; Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Welty J.,Stillman S.,Zeng X.,et al. Increased Likelihood of Appreciable Afternoon Rainfall Over Wetter or Drier Soils Dependent Upon Atmospheric Dynamic Influence[J],2020,47(11).
APA	Welty J.,Stillman S.,Zeng X.,Santanello J.,&Jr..(2020).Increased Likelihood of Appreciable Afternoon Rainfall Over Wetter or Drier Soils Dependent Upon Atmospheric Dynamic Influence.Geophysical Research Letters,47(11).
MLA	Welty J.,et al."Increased Likelihood of Appreciable Afternoon Rainfall Over Wetter or Drier Soils Dependent Upon Atmospheric Dynamic Influence".Geophysical Research Letters 47.11(2020).