气候变化领域集成服务门户(CCPortal): The Unseen Effects of Deforestation: Biophysical Effects on Climate

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DOI	10.3389/ffgc.2022.756115
	The Unseen Effects of Deforestation: Biophysical Effects on Climate
	Lawrence, Deborah; Coe, Michael; Walker, Wayne; Verchot, Louis; Vandecar, Karen
发表日期	2022
EISSN	2624-893X
卷号	5
英文摘要	Climate policy has thus far focused solely on carbon stocks and sequestration to evaluate the potential of forests to mitigate global warming. These factors are used to assess the impacts of different drivers of deforestation and forest degradation as well as alternative forest management. However, when forest cover, structure and composition change, shifts in biophysical processes (the water and energy balances) may enhance or diminish the climate effects of carbon released from forest aboveground biomass. The net climate impact of carbon effects and biophysical effects determines outcomes for forest and agricultural species as well as the humans who depend on them. Evaluating the net impact is complicated by the disparate spatio-temporal scales at which they operate. Here we review the biophysical mechanisms by which forests influence climate and synthesize recent work on the biophysical climate forcing of forests across latitudes. We then combine published data on the biophysical effects of deforestation on climate by latitude with a new analysis of the climate impact of the CO2 in forest aboveground biomass by latitude to quantitatively assess how these processes combine to shape local and global climate. We find that tropical deforestation leads to strong net global warming as a result of both CO2 and biophysical effects. From the tropics to a point between 30 degrees N and 40 degrees N, biophysical cooling by standing forests is both local and global, adding to the global cooling effect of CO2 sequestered by forests. In the mid-latitudes up to 50 degrees N, deforestation leads to modest net global warming as warming from released forest carbon outweighs a small opposing biophysical cooling. Beyond 50 degrees N large scale deforestation leads to a net global cooling due to the dominance of biophysical processes (particularly increased albedo) over warming from CO2 released. Locally at all latitudes, forest biophysical impacts far outweigh CO2 effects, promoting local climate stability by reducing extreme temperatures in all seasons and times of day. The importance of forests for both global climate change mitigation and local adaptation by human and non-human species is not adequately captured by current carbon-centric metrics, particularly in the context of future climate warming.
英文关键词	forest; biophysical effects; temperature; climate policy; deforestation; afforestation
语种	英语
WOS研究方向	Ecology ; Forestry
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000782095400001
来源期刊	FRONTIERS IN FORESTS AND GLOBAL CHANGE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280440
作者单位	University of Virginia; Alliance; International Center for Tropical Agriculture - CIAT
推荐引用方式 GB/T 7714	Lawrence, Deborah,Coe, Michael,Walker, Wayne,et al. The Unseen Effects of Deforestation: Biophysical Effects on Climate[J],2022,5.
APA	Lawrence, Deborah,Coe, Michael,Walker, Wayne,Verchot, Louis,&Vandecar, Karen.(2022).The Unseen Effects of Deforestation: Biophysical Effects on Climate.FRONTIERS IN FORESTS AND GLOBAL CHANGE,5.
MLA	Lawrence, Deborah,et al."The Unseen Effects of Deforestation: Biophysical Effects on Climate".FRONTIERS IN FORESTS AND GLOBAL CHANGE 5(2022).