DOI: 10.1002/2015GL063826
论文题名: Northeast Indian stalagmite records Pacific decadal climate change: Implications for moisture transport and drought in India
作者: Myers C.G. ; Oster J.L. ; Sharp W.D. ; Bennartz R. ; Kelley N.P. ; Covey A.K. ; Breitenbach S.F.M.
刊名: Geophysical Research Letters
ISSN: 0094-9395
EISSN: 1944-9126
出版年: 2015
卷: 42, 期: 10 起始页码: 4124
结束页码: 4132
语种: 英语
英文关键词: El Niño
; Indian monsoon
; NPGO
; oxygen isotopes
; PDO
; speleothem
Scopus关键词: Atmospheric movements
; Atmospheric temperature
; Atmospheric thermodynamics
; Isotopes
; Moisture
; Moisture control
; Nickel
; Oceanography
; Surface waters
; Indian monsoon
; NPGO
; Oxygen isotopes
; PDO
; Speleothem
; Climate change
; climate variation
; decadal variation
; drought stress
; El Nino
; moisture transfer
; oxygen isotope
; sea surface temperature
; speleothem
; stalagmite
; India
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: Two types of El Niño events are distinguished by sea surface temperature (SST) anomalies centered in the central or eastern equatorial Pacific. The Central Pacific El Niño events (CP-El Niño) are more highly correlated with weakening of the central Indian Summer Monsoon and linked to decadal Pacific climate variability. We present a 50 year, subannually resolved speleothem δ18O record from northeast India that exhibits a significant correlation with northern Pacific decadal variability and central equatorial Pacific SSTs. Accordingly, we suggest that δ18O time series in similar northeast Indian speleothems are effective tools for investigating preinstrumental changes in Pacific climate, including changes in El Niño dynamics. In contrast to central India, rainfall amounts in northeast India are relatively unaffected by El Niño. However, back trajectory analysis indicates that during CP-El Niño events moisture transport distance to northeast India is reduced, suggesting that variations in moisture transport primarily control δ18O in the region. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931560130&doi=10.1002%2f2015GL063826&partnerID=40&md5=40c4ccfc291a5a9025d8a48b3a039bfc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9010
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: Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN, United States
Recommended Citation:
Myers C.G.,Oster J.L.,Sharp W.D.,et al. Northeast Indian stalagmite records Pacific decadal climate change: Implications for moisture transport and drought in India[J]. Geophysical Research Letters,2015-01-01,42(10).