Two ice core records reconstruct paleoclimate in North Pacific
This paper presents a long-term record of sea salt accumulation in the Denali ice core from Alaska, which is interpreted as a time series of the strength of the wintertime Aleutian Low pressure system. The main conclusions are that the strength of the Aleutian Low has been increasing since the mid-18th century, and the Aleutian Low strength during the instrumental time period is exceptional for the last millennium. The authors hypothesize that a rise in tropical sea surface temperatures may be the cause of this trend. This is an impactful piece of work on recent climate. The remarkable replication in the two new ice cores and complimentary data from Mount Logan is significant and will be of great use to other researchers working on the paleoclimate of the North Pacific sector, as well as at lower latitudes and modeling.
- Article Category
- Research Letters
The 1200 year composite ice core record of Aleutian Low intensification
- First Published:
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Eos.org: Earth & Space Science News
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