气候变化领域集成服务门户(CCPortal): A 290-a record of atmospheric circulation over the North Pacific from a Mt. Logan ice core, Yukon Territory

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	A 290-a record of atmospheric circulation over the North Pacific from a Mt. Logan ice core, Yukon Territory
	Kang, SC; Mayewski, PA; Yan, YP
通讯作者	Kang, SC (通讯作者)
发表日期	2005
ISSN	0253-505X
起始页码	81
结束页码	90
卷号	24 期号:4
英文摘要	Calibrations between sodium (Na(+)) concentrations from a Mt. Logan ice core and sea level pressure (SLP) series show that Na(+) concentrations are closely correlated with the autumn-time (September-October-November) Aleutian low (AleuLow). A deepening of the AleuLow strengthens the transport of sea-salt aerosols from the North Pacific to the Mt. Logan region. The Mt. Logan Na(+) record is used to develop a 292 a (16881979) reconstruction of the AleuLow revealing a dramatic intensification of atmospheric circulation over the North Pacific region since the 20th century. Mean SLP of the AleuLow was about 1 hPa lower during the 20th century than during prior periods. The strongest deepening of the AleuLow appeared in the 1950s. Significant correlations are also found between the Mt. Logan AleuLow proxy series and the Pacific decadal oscillation (PDO) and Pacific circulation (PC) index during the 20th century. Evolutionary spectral analysis of the proxy record shows significant periodicities from 15 to 30 a consistent with PDO fluctuations and the bidecadal oscillation of North Pacific atmosphere-ocean circulation. A period of 11 a in the AleuLow record may be associated with the Schwabe 11-a cycle of sunspot activity. Additional longer ice core records from this region will aid in the efforts to further understand the climatic change over the North Pacific region.
关键词	DECADAL CLIMATE VARIABILITY HEMISPHERE OSCILLATION ATLANTIC OCEAN GLACIOCHEMISTRY PRECIPITATION CENTURIES PATTERNS AMERICA
英文关键词	atmospheric circulation; ice core records; North Pacific
语种	英语
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000231165800009
来源期刊	ACTA OCEANOLOGICA SINICA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257386
推荐引用方式 GB/T 7714	Kang, SC,Mayewski, PA,Yan, YP. A 290-a record of atmospheric circulation over the North Pacific from a Mt. Logan ice core, Yukon Territory[J]. 中国科学院青藏高原研究所,2005,24(4).
APA	Kang, SC,Mayewski, PA,&Yan, YP.(2005).A 290-a record of atmospheric circulation over the North Pacific from a Mt. Logan ice core, Yukon Territory.ACTA OCEANOLOGICA SINICA,24(4).
MLA	Kang, SC,et al."A 290-a record of atmospheric circulation over the North Pacific from a Mt. Logan ice core, Yukon Territory".ACTA OCEANOLOGICA SINICA 24.4(2005).