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2019 Fiscal Year Final Research Report

Projecting discharge from the Greenland ice sheet using climatic forcings derived from atmosphere-ocean models

Research Project

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Project/Area Number 16H02224
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionHokkaido University

Principal Investigator

Greve Ralf  北海道大学, 低温科学研究所, 教授 (90374644)

Co-Investigator(Kenkyū-buntansha) 杉山 慎  北海道大学, 低温科学研究所, 教授 (20421951)
阿部 彩子  東京大学, 大気海洋研究所, 教授 (30272537)
Project Period (FY) 2016-04-01 – 2020-03-31
Keywords氷床 / 力学 / 気候変動 / 数値モデル / グリーンランド
Outline of Final Research Achievements

We conducted future-climate simulations for the Greenland ice sheet with the SICOPOLIS model, driven by atmospheric and oceanic forcings produced by an ensemble of global climate models (including MIROC). The simulated sea-level contribution of the Greenland ice sheet for the period 2015–2100 is 133.0 ± 40.7 mm for the RCP8.5/SSP5-8.5 pathway that represents continued emissions of greenhouse gases, and it is 48.6 ± 6.2 mm for the RCP2.6/SSP1-2.6 pathway that represents ambitious emissions reductions. Further, we constructed a new geothermal heal flux map for Greenland, simulated the impact of an observed basal mega-canyon on subglacial water flow, and investigated the local dynamics of Bowdoin Glacier and the NEEM ice core.

Free Research Field

雪氷・寒冷圏科学

Academic Significance and Societal Importance of the Research Achievements

地球上に存在する淡水の大部分は、グリーンランドと南極の氷床に氷として蓄積されており、その総量は海水準に換算して約65 mとなる。現在進行する人為起源の地球温暖化を背景として、氷床の変動とその動力学は、人類社会に直結した重要な研究課題である。本研究の成果は、国連のIPCC(Intergovernmental Panel on Climate Change)が取り組む次期IPCCレポート(AR6)に提供され、地球環境の変動予測の精緻化に貢献するものである。

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Published: 2021-02-19  

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