气候变化领域集成服务门户(CCPortal): Observational and model evidence for positive low-level cloud feedback

CCPortal

DOI	10.1126/science.1171255
	Observational and model evidence for positive low-level cloud feedback
	Clement A.C.; Burgman R.; Norris J.R.
发表日期	2009
ISSN	0036-8075
起始页码	460
结束页码	464
卷号	325 期号:5939
英文摘要	Feedbacks involving low-level clouds remain a primary cause of uncertainty in global climate model projections. This issue was addressed by examining changes in low-level clouds over the Northeast Pacific in observations and climate models. Decadal fluctuations were identified in multiple, independent cloud data sets, and changes in cloud cover appeared to be linked to changes in both local temperature structure and large-scale circulation. This observational analysis further indicated that clouds act as a positive feedback in this region on decadal time scales. The observed relationships between cloud cover and regional meteorological conditions provide a more complete way of testing the realism of the cloud simulation in current-generation climate models. The only model that passed this test simulated a reduction in cloud cover over much of the Pacific when greenhouse gases were increased, providing modeling evidence for a positive low-level cloud feedback.
英文关键词	atmospheric general circulation model; climate modeling; cloud cover; data set; decadal variation; global climate; greenhouse gas; article; climate; climate change; cloud; environmental temperature; feedback system; geographic information system; greenhouse gas; humidity; meteorology; observational study; Pacific islands; priority journal; sea surface temperature; simulation; Pacific Ocean; Pacific Ocean (Northeast)
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243346
作者单位	Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Division of Meteorology and Physical Oceanography, 4600 Rickenbacker Causeway, Miami, FL 33149, United States; Scripps Institution of Oceanography, University of California-San Diego, San Diego, CA 92093-0224, United States
推荐引用方式 GB/T 7714	Clement A.C.,Burgman R.,Norris J.R.. Observational and model evidence for positive low-level cloud feedback[J],2009,325(5939).
APA	Clement A.C.,Burgman R.,&Norris J.R..(2009).Observational and model evidence for positive low-level cloud feedback.Science,325(5939).
MLA	Clement A.C.,et al."Observational and model evidence for positive low-level cloud feedback".Science 325.5939(2009).