A 200 year sub-annual record of sulfate in West Antarctica, from 16 ice cores

被引：39

作者：

Dixon, D ^{[1
]}

Mayewski, PA ^{[1
]}

Kaspari, S ^{[1
]}

Sneed, S ^{[1
]}

Handley, M ^{[1
]}

机构：

[1] Univ Maine, Climate Change Inst, Orono, ME 04469 USA

来源：

ANNALS OF GLACIOLOGY, VOL 39, 2004 | 2004年 / 39卷

关键词：

D O I：

10.3189/172756404781814113

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Sixteen high-resolution ice-core records from West Antarctica and South Pole are used to examine the spatial and temporal distribution of sulfate for the last 200 years. The preservation of seasonal layers throughout the length of each record results in a dating accuracy of better than 1 year based on known global-scale volcanic events. A dual transport source for West Antarctic sea-salt (ss) SO42- and excess (xs) SO42- is observed: lower-tropospheric for areas below 1000m elevation and mid-/upper-tropospheric/stratospheric for areas located above 1000m. Our XsSO(4)(2-) records with volcanic peaks removed do not display any evidence of an anthropogenic impact on West Antarctic SO42- concentrations but do reveal that a major climate transition takes place over West Antarctica at similar to 1940. Global-scale volcanic eruptions appear as significant peaks in the robust-spline residual xsSO(4)(2-) records from sites located above 1000 m elevation but do not appear in the residual records from sites located below 1000 m.

引用

页码：545 / 556

页数：12

共 47 条

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