气候变化领域集成服务门户(CCPortal): Leaf Trait Acclimation Amplifies Simulated Climate Warming in Response to Elevated Carbon Dioxide

CCPortal

DOI	10.1029/2018GB005883
	Leaf Trait Acclimation Amplifies Simulated Climate Warming in Response to Elevated Carbon Dioxide
	Kovenock M.; Swann A.L.S.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1437
结束页码	1448
卷号	32 期号:10
英文摘要	Vegetation modifies Earth's climate by controlling the fluxes of energy, carbon, and water. Of critical importance is a better understanding of how vegetation responses to climate change will feedback on climate. Observations show that plant traits respond to elevated carbon dioxide concentrations. These plant trait acclimations can alter leaf area and, thus, productivity and surface energy fluxes. Yet the climate impacts of plant structural trait acclimations remain to be tested and quantified. Here we show that one leaf trait acclimation in response to elevated carbon dioxide—a one-third increase in leaf mass per area—significantly impacts climate and carbon cycling in Earth system model experiments. Global net primary productivity decreases (−5.8 PgC/year, 95% confidence interval [CI95%] −5.5 to −6.0), representing a decreased carbon dioxide sink of similar magnitude to current annual fossil fuel emissions (8 PgC/year). Additional anomalous terrestrial warming (+0.3 °C globally, CI95% 0.2 to 0.4), especially of the northern extratropics (+0.4 °C, CI95% 0.2 to 0.5), results from reduced evapotranspiration and enhanced absorption of solar radiation at the surface. Leaf trait acclimation drives declines in productivity and evapotranspiration by reducing leaf area growth in response to elevated carbon dioxide, as a one-third increase in leaf mass per area raises the cost of building leaf area and productivity fails to fully compensate. Our results suggest that plant trait acclimations, such as changing leaf mass per area, should be considered in climate projections and provide additional motivation for ecological and physiological experiments that determine plant responses to environment. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	carbon cycle; climate impact; global warming; plant traits; vegetation feedbacks
语种	英语
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129791
作者单位	Department of Biology, University of Washington, Seattle, WA, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Kovenock M.,Swann A.L.S.. Leaf Trait Acclimation Amplifies Simulated Climate Warming in Response to Elevated Carbon Dioxide[J],2018,32(10).
APA	Kovenock M.,&Swann A.L.S..(2018).Leaf Trait Acclimation Amplifies Simulated Climate Warming in Response to Elevated Carbon Dioxide.Global Biogeochemical Cycles,32(10).
MLA	Kovenock M.,et al."Leaf Trait Acclimation Amplifies Simulated Climate Warming in Response to Elevated Carbon Dioxide".Global Biogeochemical Cycles 32.10(2018).