气候变化领域集成服务门户(CCPortal): Drought stress and hurricane defoliation influence mountain clouds and moisture recycling in a tropical forest

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DOI	10.1073/pnas.2021646118
	Drought stress and hurricane defoliation influence mountain clouds and moisture recycling in a tropical forest
	Scholl M.A.; Bassiouni M.; Torres-Sánchez A.J.
发表日期	2021
ISSN	00278424
卷号	118 期号:7
英文摘要	Mountain ranges generate clouds, precipitation, and perennial streamflow for water supplies, but the role of forest cover in mountain hydrometeorology and cloud formation is not well understood. In the Luquillo Experimental Forest of Puerto Rico, mountains are immersed in clouds nightly, providing a steady precipitation source to support the tropical forest ecosystems and human uses. A severe drought in 2015 and the removal of forest canopy (defoliation) by Hurricane Maria in 2017 created natural experiments to examine interactions between the living forest and hydroclimatic processes. These unprecedented land-based observations over 4.5 y revealed that the orographic cloud system was highly responsive to local land-surface moisture and energy balances moderated by the forest. Cloud layer thickness and immersion frequency on the mountain slope correlated with antecedent rainfall, linking recycled terrestrial moisture to the formation of mountain clouds; and cloud-base altitude rose during drought stress and posthurricane defoliation. Changes in diurnal cycles of temperature and vapor-pressure deficit and an increase in sensible versus latent heat flux quantified local meteorological response to forest disturbances. Temperature and water vapor anomalies along the mountain slope persisted for at least 12 mo posthurricane, showing that understory recovery did not replace intact forest canopy function. In many similar settings around the world, prolonged drought, increasing temperatures, and deforestation could affect orographic cloud precipitation and the humans and ecosystems that depend on it. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Ecohydrology \| orographic precipitation \| moisture recycling \| disturbance hydrology \| climate
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180610
作者单位	US Geological Survey Water Resources, Reston, VA 20192, United States; Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, 750 07, Sweden; US Geological Survey Caribbean-Florida Water Science Center, Guaynabo, PR 00965, Puerto Rico
推荐引用方式 GB/T 7714	Scholl M.A.,Bassiouni M.,Torres-Sánchez A.J.. Drought stress and hurricane defoliation influence mountain clouds and moisture recycling in a tropical forest[J],2021,118(7).
APA	Scholl M.A.,Bassiouni M.,&Torres-Sánchez A.J..(2021).Drought stress and hurricane defoliation influence mountain clouds and moisture recycling in a tropical forest.Proceedings of the National Academy of Sciences of the United States of America,118(7).
MLA	Scholl M.A.,et al."Drought stress and hurricane defoliation influence mountain clouds and moisture recycling in a tropical forest".Proceedings of the National Academy of Sciences of the United States of America 118.7(2021).