干旱区生态环境知识资源中心(Arid): SPARTICUS: Small Particles in Cirrus Science and Operations Plan

Arid

DOI	10.2172/971206
报告编号	DOE/SC-ARM-10-003
来源ID	OSTI_ID: 971206
	SPARTICUS: Small Particles in Cirrus Science and Operations Plan
	Mace, J.; Jensen, E.; McFarquhar, G.; Comstock, J.; Ackerman, T.; Mitchell, D.; Liu, X.; Garrett, T.
英文摘要	From a mass-weighted perspective, cirrus clouds exert an enormous influence on the radiative energy budget of the earth鈥檚 climate system. Owing to their location in the cold upper troposphere, cirrus can significantly reduce the outgoing longwave radiation while, at the same time, remaining relatively transmissive to solar energy. Thus, cirrus clouds are the only cloud genre that can exert a direct radiative warming influence on the climate system (Ackerman et al. 1988). It is not surprising, therefore, that general circulation models (GCMs) are especially sensitive to the presence of cirrus in the model atmosphere. Lohmann and Roeckner (1995), for instance, show that the climate sensitivity can vary by as much as 40% due to the properties of cirrus varying between transparent and opaque limits. Lohmann and Roeckner (1995) also identify a key feedback by cirrus that is often overlooked; on longer time scales cloud heating in the upper troposphere can act to maintain and modulate the general circulation of the atmosphere through accelerating the subtropical and polar jet streams. Understanding these mechanisms and representing them in models is complicated by the fact that cirrus properties vary over an enormous dynamic range compared to most other clouds.
出版年	2009
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	14 SOLAR ENERGY ; CLIMATES ; CLOUDS ; ECOSYSTEMS ; ENERGY BALANCE ; FEEDBACK ; GENERAL CIRCULATION MODELS ; HEATING ; RADIATIONS ; SENSITIVITY ; SOLAR ENERGY ; TROPOSPHERE
URL	http://www.osti.gov/scitech/servlets/purl/971206
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/269929
推荐引用方式 GB/T 7714	Mace, J.,Jensen, E.,McFarquhar, G.,et al. SPARTICUS: Small Particles in Cirrus Science and Operations Plan,2009.