HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Institute of Low Temperature Science >
低温科学 = Low Temperature Science >
第75巻 >


Files in This Item:
5_37-44.pdf1.4 MBPDFView/Open
Please use this identifier to cite or link to this item:

Title: グリーンランド氷床北西部沿岸部における表面質量収支の変動
Other Titles: Surface mass balance variations in a maritime area of the northwestern Greenland Ice Sheet
Authors: 的場, 澄人1 Browse this author →KAKEN DB
山口, 悟2 Browse this author
對馬, あかね3 Browse this author
青木, 輝夫4 Browse this author
杉山, 慎5 Browse this author →KAKEN DB
Authors(alt): Matoba, Sumito1
Yamaguchi, Satoru2
Tsushima, Akane3
Aoki, Teruo4
Sugiyama, Shin5
Keywords: グリーンランド氷床
Issue Date: 31-Mar-2017
Publisher: 低温科学第75巻編集委員会
Journal Title: 低温科学
Journal Title(alt): Low Temperature Science
Volume: 75
Start Page: 37
End Page: 44
Abstract: グリーンランド氷床北西部における数十年間の表面質量収支を明らかにすることを目的に標高1490 m地点と1750 m地点においてそれぞれ19 mと6.5 m長のアイスコアを採取した.1750 mで採取されたアイスコアは全層乾雪で構成されていた.一方,1490 m地点で採取されたアイスコアは,浅部は表面融解の影響を受けた氷板やザラメ雪層で構成されているのに対し,深部は乾雪で構成されていた.1490 m地点の年間の表面質量収支は,融解の影響が大きくなる2001年以降に減少していた.この地域では,近年降水量の増加が観測されていることから,1490 m地点では表面融解水の流出が生じている可能性が示された.
We conducted shallow ice core drillings at two sites (SIGMA-A: 1490 m a.s.l., SIGMA-A2: 1750 m a.s.l.) on the Greenland Ice Sheet to estimate the past surface mass balance for several decades. The ice cores obtained from the site SIGMA-A2 were composed of dry snow layers. In contrast, the shallower parts of the ice cores obtained from the site SIGMA-A were composed of ice layers and wet snow layers influenced by surface melt water, and the deeper parts were composed of dry snow layers. The reconstructed surface mass balance at the site SIGMA-A decreased since 2001 when melt water influence increased. Because the amount of precipitation in this region has increased recently, we suggest that the low surface mass balance since 2001 indicates that run-off of melt water from the ice sheet has occurred.
Type: bulletin (article)
Appears in Collections:低温科学 = Low Temperature Science > 第75巻

Export metadata:

OAI-PMH ( junii2 , jpcoar )

MathJax is now OFF:


Feedback - Hokkaido University