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Origins of Air Masses over an Alaskan Glacier and Implications for Ice Core Studies in the North Pacific Region

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Title: Origins of Air Masses over an Alaskan Glacier and Implications for Ice Core Studies in the North Pacific Region
Authors: Yasunari, Teppei J. Browse this author
Yamazaki, Koji Browse this author →KAKEN DB
Issue Date: 2009
Publisher: Meteorological Society of Japan
Journal Title: SOLA
Volume: 5
Start Page: 77
End Page: 80
Publisher DOI: 10.2151/sola.2009-020
Abstract: Simulations of 10-day backward trajectories of air masses from Mount Wrangell, an Alaskan ice core site, were calculated for 11 years on a daily basis. Results were analyzed statistically in order to interpret monthly air mass contributions over the ice core site and to discuss implications for ice core studies in the North Pacific Region (NPR). Increases in tropospheric air mass transport from EA in spring suggest favorable transport conditions for Asian dust during this season. The stratospheric air mass (< 300 hPa) over the ice core site increases in winter and that from East Asia (EA) to the North Pacific Ocean in late spring. The tritium peaks observed in the ice core in late spring were discussed in the context of the present results with two possibilities on the time lag of tritium transportation in the stratosphere and the seasonal variations of water vapor amount in the troposphere. Increases in air masses originating from Siberia, Alaska and Canada in summer-fall favor the transport of black carbon due to forest fires over the ice core site. These results allow advanced interpretation of the origin and transport processes of materials in the ice core proxies in the NPR.
Type: article
URI: http://hdl.handle.net/2115/42618
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山崎 孝治

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