气候变化领域集成服务门户(CCPortal): Assessing global and regional effects of reconstructed land-use and land-cover change on climate since 1950 using a coupled land-atmosphere-ocean model

CCPortal

DOI	10.1175/JCLI-D-20-0108.1
	Assessing global and regional effects of reconstructed land-use and land-cover change on climate since 1950 using a coupled land-atmosphere-ocean model
	Huang H.; Xue Y.; Chilukoti N.; Liu Y.; Chen G.; Diallo I.
发表日期	2020
ISSN	0894-8755
起始页码	8997
结束页码	9013
卷号	33 期号:10
英文摘要	Land-use and land-cover change (LULCC) is one of the most important forcings affecting climate in the past century. This study evaluates the global and regional LULCC impacts in 1950-2015 by employing an annually updated LULCC map in a coupled land-atmosphere-ocean model. The difference between LULCC and control experiments shows an overall land surface temperature (LST) increase by 0.48K in the LULCC regions and a widespread LST decrease by 0.18K outside the LULCC regions. A decomposed temperature metric (DTM) is applied to quantify the relative contribution of surface processes to temperature changes. Furthermore, while precipitation in the LULCC areas is reduced in agreement with declined evaporation, LULCC causes a southward displacement of the intertropical convergence zone (ITCZ) with a narrowing by 0.5°, leading to a tripole anomalous precipitation pattern over the warm pool. The DTM shows that the temperature response in LULCC regions results from the competing effect between increased albedo (cooling) and reduced evaporation (warming). The reduced evaporation indicates less atmospheric latent heat release in convective processes and thus a drier and cooler troposphere, resulting in a reduction in surface cooling outside the LULCC regions. The southward shift of the ITCZ implies a northward cross-equatorial energy transport anomaly in response to reduced latent/sensible heat of the atmosphere in the Northern Hemisphere, where LULCC is more intensive. Tropospheric cooling results in the equatorward shift of the upper-tropospheric westerly jet in both hemispheres, which, in turn, leads to an equatorward narrowing of the Hadley circulation and ITCZ. © 2020 American Meteorological Society.
英文关键词	Atmospheric thermodynamics; Climate change; Climate models; Evaporation; Land use; Troposphere; Atmosphere-ocean modeling; Intertropical convergence zone; Land use and land cover change; Latent heat release; Northern Hemispheres; Precipitation patterns; Relative contribution; Temperature response; Land surface temperature; air-sea interaction; climate change; climate modeling; general circulation model; Hadley cell; intertropical convergence zone; land cover; land use change; Northern Hemisphere; regional climate
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171533
作者单位	Department of Geography, University of California, Los Angeles, Los Angeles, CA, United States; Department of Geography, Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Huang H.,Xue Y.,Chilukoti N.,et al. Assessing global and regional effects of reconstructed land-use and land-cover change on climate since 1950 using a coupled land-atmosphere-ocean model[J],2020,33(10).
APA	Huang H.,Xue Y.,Chilukoti N.,Liu Y.,Chen G.,&Diallo I..(2020).Assessing global and regional effects of reconstructed land-use and land-cover change on climate since 1950 using a coupled land-atmosphere-ocean model.Journal of Climate,33(10).
MLA	Huang H.,et al."Assessing global and regional effects of reconstructed land-use and land-cover change on climate since 1950 using a coupled land-atmosphere-ocean model".Journal of Climate 33.10(2020).