气候变化领域集成服务门户(CCPortal): Observational determination of albedo decrease caused by vanishing Arctic sea ice

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DOI	10.1073/pnas.1318201111
	Observational determination of albedo decrease caused by vanishing Arctic sea ice
	Pistone K.; Eisenman I.; Ramanathan V.
发表日期	2014
ISSN	0027-8424
起始页码	3322
结束页码	3326
卷号	111 期号:9
英文摘要	The decline of Arctic sea ice has been documented in over 30 y of satellite passive microwave observations. The resulting darkening of the Arctic and its amplification of global warming was hypothesized almost 50 y ago but has yet to be verified with direct observations. This study uses satellite radiation budget measurements along with satellite microwave sea ice data to document the Arctic-wide decrease in planetary albedo and its amplifying effect on the warming. The analysis reveals a striking relationship between planetary albedo and sea ice cover, quantities inferred from two independent satellite instruments. We find that the Arctic planetary albedo has decreased from 0.52 to 0.48 between 1979 and 2011, corresponding to an additional 6.4 ± 0.9 W/m2 of solar energy input into the Arctic Ocean region since 1979. Averaged over the globe, this albedo decrease corresponds to a forcing that is 25% as large as that due to the change in CO2 during this period, considerably larger than expectations from models and other less direct recent estimates. Changes in cloudiness appear to play a negligible role in observed Arctic darkening, thus reducing the possibility of Arctic cloud albedo feedbacks mitigating future Arctic warming.
语种	英语
scopus关键词	albedo; Arctic; article; greenhouse effect; microwave radiation; observational study; priority journal; radiation measurement; sea; sea ice; Arctic Regions; Climate Change; Ice Cover; Satellite Imagery; Seasons; Sunlight
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158921
作者单位	Pistone, K., Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0221, United States; Eisenman, I., Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0221, United States; Ramanathan, V., Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0221, United States
推荐引用方式 GB/T 7714	Pistone K.,Eisenman I.,Ramanathan V.. Observational determination of albedo decrease caused by vanishing Arctic sea ice[J],2014,111(9).
APA	Pistone K.,Eisenman I.,&Ramanathan V..(2014).Observational determination of albedo decrease caused by vanishing Arctic sea ice.Proceedings of the National Academy of Sciences of the United States of America,111(9).
MLA	Pistone K.,et al."Observational determination of albedo decrease caused by vanishing Arctic sea ice".Proceedings of the National Academy of Sciences of the United States of America 111.9(2014).