干旱区生态环境知识资源中心(Arid): Comparison of Dryland Climate Change in Observations and CMIP5 Simulations

Arid

	Comparison of Dryland Climate Change in Observations and CMIP5 Simulations
	Ji Mingxia; Huang Jianping; Xie Yongkun; Liu Jun
来源期刊	Advances in Atmospheric Sciences
ISSN	0256-1530
出版年	2015
卷号	32 期号:11 页码:1565-1574
英文摘要	A comparison of observations with 20 climate model simulations from the Coupled Model Intercomparison Project, Phase 5 (CMIP5) revealed that observed dryland expansion amounted to 2.61 * 10~6 km~2 during the 58 years from 1948 to 2005, which was four times higher than that in the simulations (0.55 * 10~6 km~2). Dryland expansion was accompanied by a decline in aridity index (AI) (drying trend) as a result of decreased precipitation and increased potential evapotranspiration across all dryland subtype areas in the observations, especially in the semi-arid and dry subhumid regions. However, the CMIP5 multi-model ensemble (MME) average performed poorly with regard to the decreasing trends of AI and precipitation. By analyzing the factors controlling AI, we found that the overall bias of AI in the simulations, compared with observations, was largely due to limitations in the simulation of precipitation. The simulated precipitation over global drylands was substantially overestimated compared with observations across all subtype areas, and the spatial distribution of precipitation in the MME was largely inconsistent in the African Sahel, East Asia, and eastern Australia, where the semi-arid and dry subhumid regions were mainly located.
英文关键词	aridity index dryland expansion climate change CMIP5
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Physics
CSCD记录号	CSCD:5506965
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335540
作者单位	Ji Mingxia, College of Atmospheric Sciences, Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.; Huang Jianping, College of Atmospheric Sciences, Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.; Xie Yongkun, College of Atmospheric Sciences, Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.; Liu Jun, College of Atmospheric Sciences, Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Ji Mingxia,Huang Jianping,Xie Yongkun,et al. Comparison of Dryland Climate Change in Observations and CMIP5 Simulations[J],2015,32(11):1565-1574.
APA	Ji Mingxia,Huang Jianping,Xie Yongkun,&Liu Jun.(2015).Comparison of Dryland Climate Change in Observations and CMIP5 Simulations.Advances in Atmospheric Sciences,32(11),1565-1574.
MLA	Ji Mingxia,et al."Comparison of Dryland Climate Change in Observations and CMIP5 Simulations".Advances in Atmospheric Sciences 32.11(2015):1565-1574.