DOI: 10.5194/cp-13-61-2017
Scopus记录号: 2-s2.0-85010333212
论文题名: Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years
作者: Ekaykin A.A. ; Vladimirova D.O. ; Lipenkov V.Y. ; Masson-Delmotte V.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2017
卷: 13, 期: 1 起始页码: 61
结束页码: 71
语种: 英语
Scopus关键词: air temperature
; Antarctic Oscillation
; climate variation
; cooling
; cyclone
; heat transfer
; Indian Ocean Dipole
; isotopic composition
; moisture transfer
; Pacific Decadal Oscillation
; reconstruction
; Southern Hemisphere
; spatiotemporal analysis
; temperature anomaly
; warming
; Antarctica
; East Antarctica
; Princess Elizabeth Land
; Russian Federation
英文摘要: We use isotopic composition (δD) data from six sites in Princess Elizabeth Land (PEL) in order to reconstruct air temperature variability in this sector of East Antarctica over the last 350 years. First, we use the present-day instrumental mean annual surface air temperature data to demonstrate that the studied region (between Russia's Progress, Vostok and Mirny research stations) is characterized by uniform temperature variability. We thus construct a stacked record of the temperature anomaly for the whole sector for the period of 1958-2015. A comparison of this series with the Southern Hemisphere climatic indices shows that the short-term inter-annual temperature variability is primarily governed by the Antarctic Oscillation (AAO) and Interdecadal Pacific Oscillation (IPO) modes of atmospheric variability. However, the low-frequency temperature variability (with period > 27 years) is mainly related to the anomalies of the Indian Ocean Dipole (IOD) mode. We then construct a stacked record of δD for the PEL for the period of 1654-2009 from individual normalized and filtered isotopic records obtained at six different sites ("PEL2016" stacked record). We use a linear regression of this record and the stacked PEL temperature record (with an apparent slope of 9 ± 5.4 ‰ °C-1) to convert PEL2016 into a temperature scale. Analysis of PEL2016 shows a 1 ± 0.6 °C warming in this region over the last 3 centuries, with a particularly cold period from the mid-18th to the mid-19th century. A peak of cooling occurred in the 1840s-a feature previously observed in other Antarctic records. We reveal that PEL2016 correlates with a low-frequency component of IOD and suggest that the IOD mode influences the Antarctic climate by modulating the activity of cyclones that bring heat and moisture to Antarctica. We also compare PEL2016 with other Antarctic stacked isotopic records. This work is a contribution to the PAGES (Past Global Changes) and IPICS (International Partnerships in Ice Core Sciences) Antarctica 2k projects. © 2017 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48946
Appears in Collections: 气候变化与战略
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Recommended Citation:
Ekaykin A.A.,Vladimirova D.O.,Lipenkov V.Y.,et al. Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years[J]. Climate of the Past,2017-01-01,13(1)