北海道大：南極氷河を溶かす仕組み解明：白瀬氷河で観測（動画）：
Hokkaido Univ:Mechanism melting Antarctic glaciers:at Shirase Glacier：
北海道大学：阐明南极冰川融化的机理：Shirase冰川的观测
北海道大：
8月24日、科学誌ネイチャーコミュニケーションズ電子版で発表した。
南極の氷河：
南極の氷河が、「氷底に流れ込む温度の高い海水で、あたためられ、水になっていく仕組み」を突き止めました。
- 南極・昭和基地近くにある白瀬氷河での観測データで解明。
- チームによると、南極には、地球上の氷の約9割が存在。
- 全てが水になると、海面が約60メートル上がるとされる。
共同通信
https://this.kiji.is/670567675336262753
Strong ice-ocean interaction beneath Shirase Glacier Tongue in East Antarctica
DaisukeHirano,TakeshiTamura,Shigeru Aokiら
volume11, Article number: 4221 (2020)
Abstract
Mass loss from the Antarctic ice sheet, Earth’s largest freshwater reservoir, results directly in global sea-level rise and Southern Ocean freshening.
Observational and modeling studies have demonstrated that ice shelf basal melting, resulting from the inflow of warm water onto the Antarctic continental shelf, plays a key role in the ice sheet’s mass balance.
In recent decades, warm ocean-cryosphere interaction in the Amundsen and Bellingshausen seas has received a great deal of attention.
However, except for Totten Ice Shelf, East Antarctic ice shelves typically have cold ice cavities with low basal melt rates.
Here we present direct observational evidence of high basal melt rates (7–16 m yr−1) beneath an East Antarctic ice shelf, Shirase Glacier Tongue,
driven by southward-flowing warm water guided by a deep continuous trough extending to the continental slope.
The strengthof the alongshore wind controls the thickness of the inflowing warm water layer and the rate of basal melting.