干旱区生态环境知识资源中心(Arid): Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere

Arid

	Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere
	Li Jiandong; Wang Tianhe; Habib Ammara
来源期刊	Journal of Meteorological Research
ISSN	2095-6037
出版年	2017
卷号	31 期号:4 页码:654-664
英文摘要	Cloud-radiation processes play an important role in regional energy budgets and surface temperature changes over arid regions. Cloud radiative effects (CREs) are used to quantitatively measure the aforementioned climatic role. This study investigates the characteristics of CREs and their temporal variations over three arid regions in central Asia (CA), East Asia (EA), and North America (NA), based on recent satellite datasets. Our results show that the annual mean shortwave (SW) and net CREs (SWCRE and NCRE) over the three arid regions are weaker than those in the same latitudinal zone of the Northern Hemisphere. In most cold months (November-March), the longwave (LW) CRE is stronger than the SWCRE over the three arid regions, leading to a positive NCRE and radiative warming in the regional atmosphere-land surface system. The cold-season mean NCRE at the top of the atmosphere (TOA) averaged over EA is 4.1 W m~(-2), with a positive NCRE from November to March, and the intensity and duration of the positive NCRE is larger than that over CA and NA. The CREs over the arid regions of EA exhibit remarkable annual cycles due to the influence of the monsoon in the south. The TOA LWCRE over arid regions is closely related to the high-cloud fraction, and the SWCRE relates well to the total cloud fraction. In addition, the relationship between the SWCRE and the low-cloud fraction is good over NA because of the considerable occurrence of low cloud. Further results show that the interannual variation of TOA CREs is small over the arid regions of CA and EA, but their surface LWCREs show certain decreasing trends that correspond well to their decreasing total cloud fraction. It is suggested that combined studies of more observational cloud properties and meteorological elements are needed for indepth understanding of cloud-radiation processes over arid regions of the Northern Hemisphere.
英文关键词	arid region cloud fraction cloud radiative effects
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	CSCD
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6057589
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335848
作者单位	Li Jiandong, Institute of Atmospheric Physics, Chinese Academy of Sciences, State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics;;Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, Beijing 100029, China.; Wang Tianhe, College of Atmospheric Sciences, Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.; Habib Ammara, Institute of Atmospheric Physics, Chinese Academy of Sciences, State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Beijing 100029, China.
推荐引用方式 GB/T 7714	Li Jiandong,Wang Tianhe,Habib Ammara. Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere[J],2017,31(4):654-664.
APA	Li Jiandong,Wang Tianhe,&Habib Ammara.(2017).Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere.Journal of Meteorological Research,31(4),654-664.
MLA	Li Jiandong,et al."Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere".Journal of Meteorological Research 31.4(2017):654-664.