气候变化领域集成服务门户(CCPortal): Early 20th-century Arctic warming intensified by Pacific and Atlantic multidecadal variability

CCPortal

DOI	10.1073/pnas.1615880114
	Early 20th-century Arctic warming intensified by Pacific and Atlantic multidecadal variability
	Tokinaga H.; Xie S.-P.; Mukougawa H.
发表日期	2017
ISSN	0027-8424
起始页码	6227
结束页码	6232
卷号	114 期号:24
英文摘要	With amplified warming and record sea ice loss, the Arctic is the canary of global warming. The historical Arctic warming is poorly understood, limiting our confidence in model projections. Specifically, Arctic surface air temperature increased rapidly over the early 20th century, at rates comparable to those of recent decades despite much weaker greenhouse gas forcing. Here, we show that the concurrent phase shift of Pacific and Atlantic interdecadal variability modes is the major driver for the rapid early 20thcentury Arctic warming. Atmospheric model simulations successfully reproduce the early Arctic warming when the interdecadal variability of sea surface temperature (SST) is properly prescribed. The early 20th-century Arctic warming is associated with positive SST anomalies over the tropical and North Atlantic and a Pacific SST pattern reminiscent of the positive phase of the Pacific decadal oscillation. Atmospheric circulation changes are important for the early 20th-century Arctic warming. The equatorial Pacific warming deepens the Aleutian low, advecting warm air into the North American Arctic. The extratropical North Atlantic and North Pacific SST warming strengthens surface westerly winds over northern Eurasia, intensifying the warming there. Coupled ocean-Atmosphere simulations support the constructive intensification of Arctic warming by a concurrent, negative-To-positive phase shift of the Pacific and Atlantic interdecadal modes. Our results aid attributing the historical Arctic warming and thereby constrain the amplified warming projected for this important region.
英文关键词	Atlantic multidecadal variability; Climate variability; Early 20th-century arctic warming; Ocean-Atmosphere interaction; Pacific decadal variability
语种	英语
scopus关键词	air temperature; Arctic; Article; Atlantic multidecadal variability; Atlantic Ocean; atmosphere; climate change; correlation analysis; greenhouse effect; history; North America; North Atlantic oscillation; Pacific decadal variability; Pacific Ocean; priority journal; sea surface temperature; article; atmosphere; gene amplification; oscillation; sea surface temperature; simulation; warming
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/158894
作者单位	Tokinaga, H., Hakubi Center for Advanced Research, Kyoto University, Kyoto, 606-8501, Japan, Disaster Prevention Research Institute, Kyoto University, Uji, 611-0011, Japan; Xie, S.-P., Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0206, United States; Mukougawa, H., Disaster Prevention Research Institute, Kyoto University, Uji, 611-0011, Japan
推荐引用方式 GB/T 7714	Tokinaga H.,Xie S.-P.,Mukougawa H.. Early 20th-century Arctic warming intensified by Pacific and Atlantic multidecadal variability[J],2017,114(24).
APA	Tokinaga H.,Xie S.-P.,&Mukougawa H..(2017).Early 20th-century Arctic warming intensified by Pacific and Atlantic multidecadal variability.Proceedings of the National Academy of Sciences of the United States of America,114(24).
MLA	Tokinaga H.,et al."Early 20th-century Arctic warming intensified by Pacific and Atlantic multidecadal variability".Proceedings of the National Academy of Sciences of the United States of America 114.24(2017).