DOI: 10.1002/2015GL063983
论文题名: Synoptic scale controls on the δ18O in precipitation across Beringia
作者: Bailey H.L. ; Kaufman D.S. ; Henderson A.C.G. ; Leng M.J.
刊名: Geophysical Research Letters
ISSN: 0094-9212
EISSN: 1944-8943
出版年: 2015
卷: 42, 期: 11 起始页码: 4608
结束页码: 4616
语种: 英语
英文关键词: Alaska
; Aleutian Low
; North Pacific Index
; oxygen isotopes
; precipitation
Scopus关键词: Earth sciences
; Geophysics
; Precipitation (chemical)
; Alaska
; Aleutian low
; Back-trajectory models
; Coherent frameworks
; North Pacific
; Oxygen isotope records
; Oxygen isotopes
; Synoptic scale circulation
; Isotopes
英文摘要: Oxygen isotope records of precipitation (δ18Oprecip ) from Beringia are thought to reflect synoptic-scale circulation changes associated with the Aleutian Low. To delineate the spatial pattern of δ18Oprecip associated with the two dominant modes of Aleutian Low circulation, we combine modern δ18Oprecip and deuterium excess data with climate reanalysis and back trajectory modeling. Aleutian Low strength and position are revealed to systematically affect regional moisture source and δ18Oprecip ; whereby a strengthened Aleutian Low causes lower (higher) δ18Oprecip in western (eastern) Beringia. We compare a new 100 year long δ18O record from the Aleutian Islands with the North Pacific Index, the primary indicator of Aleutian Low strength, and find a significant positive relationship (r = 0.43, P < 0.02, n = 28) that tracks late twentieth century change. This study demonstrates synoptic-scale circulation controls on our isotope record and provides a coherent framework for interpreting existing and emerging paleoisotope data from the region. ©2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934441069&doi=10.1002%2f2015GL063983&partnerID=40&md5=148fe1b86f51ae5e51c678050620a11e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8828
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Geography, Politics and Sociology, Newcastle University, Newcastle-upon-Tyne, United Kingdom
Recommended Citation:
Bailey H.L.,Kaufman D.S.,Henderson A.C.G.,et al. Synoptic scale controls on the δ18O in precipitation across Beringia[J]. Geophysical Research Letters,2015-01-01,42(11).