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DOI	10.1088/1748-9326/ab018a
	The asymmetric impact of abundant preceding rainfall on heat stress in low latitudes
	Liu X.; Tang Q.; Liu W.; Yang H.; Groisman P.; Leng G.; Ciais P.; Zhang X.; Sun S.
发表日期	2019
ISSN	17489318
卷号	14 期号:4
英文摘要	In addition to high temperature, high humidity can have significant consequences on thermal comfort of human beings. The co-occurrence of high temperature and high humidity (so-called 'oppressive hot days') often results in heat stress events, but the extent to which it is affected by preceding surface moisture has not been fully understood to date. In this study, we examine the relations between preceding 3-month standardized precipitation index (SPI) and the number of hot days indicated by the surface air temperature (NHD-Tx) and the wet-bulb globe temperature (NHD-Wx) that combines both temperature and humidity in the hottest month in low latitudes. Results show that, in contrast with the negative correlations between SPI and NHD-Tx, which are associated with the previously reported precipitation deficit-temperature feedback, significant positive correlations between SPI and NHD-Wx are found in some low latitude areas. The probability of above-average NHD-Wx could be ∼30% higher after wet conditions than that after dry conditions in areas like southern South America, some parts of Africa, and West Asia. Hotspot analyses further show that abundant preceding rainfall has an asymmetric impact on oppressive hot days by favoring more above-average NHD-Wx. Our analyses imply that a local feedback may exist between surface moisture and oppressive hot extremes, via which the unbearable heat stress over some parts of the tropics is modulated, controlled, and/or caused by changes in the preceding near-surface humidity/soil moisture. The spatially heterogeneous patterns of the relations between preceding rainfall and heat stress confirm the precipitation deficit-temperature feedback in many areas and reveal the coexistence of surface moisture-oppressive heat stress in several low latitude areas. We emphasize the necessity of considering both feedbacks for a better understanding of the distinct roles of preceding rainfall in the consequent development of heat stress in low latitudes. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	heat extremes; humidity; land-atmosphere coupling; preceding rainfall; surface moisture
语种	英语
scopus关键词	Atmospheric humidity; Feedback; Humidity control; Rain; Land-atmosphere couplings; Precipitation deficits; Southern south america; Standardized precipitation index; Surface air temperatures; Surface moistures; Temperature and humidities; Wet-bulb globe temperatures; Thermal stress; air temperature; asymmetry; environmental stress; extreme event; high temperature; humidity; land-atmosphere interaction; latitude; moisture; rainfall; Africa; South America; West Asia
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154650
作者单位	Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, Duebendorf, CH-8600, Switzerland; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, F-91191, France; Department of Environmental Sciences, MGU, University of Basel, Petersplatz 1, Basel, CH-4003, Switzerland; North Carolina State University, NOAA National Centers for Environmental Information, 151 Patton Avenue, Asheville, NC 28801, United States; P P Shirshov Institute for Oceanology, Russian Academy of Sciences, Moscow, Russian Federation; Hydrology Science and Services Corp., 920 Rockhold Drive, Asheville, NC 28804, United States; Environmental Change Insti...
推荐引用方式 GB/T 7714	Liu X.,Tang Q.,Liu W.,et al. The asymmetric impact of abundant preceding rainfall on heat stress in low latitudes[J],2019,14(4).
APA	Liu X..,Tang Q..,Liu W..,Yang H..,Groisman P..,...&Sun S..(2019).The asymmetric impact of abundant preceding rainfall on heat stress in low latitudes.Environmental Research Letters,14(4).
MLA	Liu X.,et al."The asymmetric impact of abundant preceding rainfall on heat stress in low latitudes".Environmental Research Letters 14.4(2019).