gchange  > 过去全球变化的重建
DOI: doi:10.1038/nclimate3226
Title:
Regional dry-season climate changes due to three decades of Amazonian deforestation
Author: Jaya Khanna; David Medvigy; Stephan Fueglistaler; Robert Walko
Source Publication: Nature Climate Change
ISSN: 1758-679X
EISSN: 1758-6799
Indexed By: SCI
Publishing Year: 2017-02-20
Volume: 2017
Language: 英语
Keyword: Atmospheric dynamics, Attribution, Hydrology
Subject in Chinese: ; 热通量 ; 降水 ; 滥伐森林 ; 高温 ; 可持续发展 ; 土地利用/土地覆盖 ; 表面粗糙度
Subject: CARBON ; HEAT FLUX ; PRECIPITATION ; DEFORESTATION ; HEAT ; SUSTAINABLE DEVELOPMENT ; LAND USE/LAND COVER ; SURFACE ROUGHNESS
English Abstract:

More than 20% of the Amazon rainforest has been cleared in the past three decades1, triggering important hydroclimatic changes1, 2, 3, 4, 5, 6. Small-scale (a few kilometres) deforestation in the 1980s has caused thermally triggered atmospheric circulations7 that increase regional cloudiness8, 9, 10 and precipitation frequency8. However, these circulations are predicted to diminish as deforestation increases11, 12, 13. Here we use multi-decadal satellite records14, 15 and numerical model simulations to show a regime shift in the regional hydroclimate accompanying increasing deforestation in Rondônia, Brazil. Compared with the 1980s, present-day deforested areas in downwind western Rondônia are found to be wetter than upwind eastern deforested areas during the local dry season. The resultant precipitation change in the two regions is approximately ±25% of the deforested area mean. Meso-resolution simulations robustly reproduce this transition when forced with increasing deforestation alone, showing that large-scale climate variability plays a negligible role16. Furthermore, deforestation-induced surface roughness reduction is found to play an essential role in the present-day dry-season hydroclimate. Our study illustrates the strong scale sensitivity of the climatic response to Amazonian deforestation and suggests that deforestation is sufficiently advanced to have caused a shift from a thermally to a dynamically driven hydroclimatic regime.

Related Link: http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate3226.html
Citation statistics:
Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/402
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
气候减缓与适应
气候变化事实与影响
全球变化的国际研究计划

Files in This Item:
File Name/ File Size Content Type Version Access License
nclimate3226.pdf(2207KB)期刊论文作者接受稿开放获取View 联系获取全文

Recommended Citation:
Jaya Khanna,David Medvigy,Stephan Fueglistaler,et al. Regional dry-season climate changes due to three decades of Amazonian deforestation[J]. Nature Climate Change,2017-02-20,2017.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Jaya Khanna]'s Articles
[David Medvigy]'s Articles
[Stephan Fueglistaler]'s Articles
百度学术
Similar articles in Baidu Scholar
[Jaya Khanna]'s Articles
[David Medvigy]'s Articles
[Stephan Fueglistaler]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Jaya Khanna]‘s Articles
[David Medvigy]‘s Articles
[Stephan Fueglistaler]‘s Articles
Related Copyright Policies
Null
收藏/分享
文件名: nclimate3226.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.