北海道大学：阐明南极冰川融化的机理：Shirase冰川的观测
北海道大学：
8月24日，发表在《自然通讯》科学杂志的电子版上。
南极冰川：
南极洲的冰川发现了“流入冰底的温暖海水将其变暖为水的机理”。
由南极洲昭和站附近的Shirase冰川的观测数据阐明。
根据研究小组的说法，地球上约有90％的冰存在于南极洲。
当一切都是水时，据说海平面上升了约60米。
合沟通
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.