Linear response of the Greenland ice sheet's tidewater glacier terminus positions to climate

Fahrner, Dominik ORCID: 0000-0002-7895-1557, Lea, James M ORCID: 0000-0003-1885-0858, Brough, Stephen ORCID: 0000-0002-6581-6081, Mair, Douglas WF ORCID: 0000-0001-7009-5461 and Abermann, Jakob
(2021) Linear response of the Greenland ice sheet's tidewater glacier terminus positions to climate. JOURNAL OF GLACIOLOGY, 67 (262). pp. 193-203.

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<jats:title>Abstract</jats:title><jats:p>Gaining knowledge of tidewater glacier (TWG) margin evolution, solid ice flux and their responses to climate over large spatio-temporal scales provides valuable context for the projection of future Greenland ice sheet (GrIS) change. Although studies of sector-wide responses of TWGs exist, studies at an ice-sheet-wide scale have only just become feasible. Here, we present a dataset of 224 annual TWG margins for 1984–2017 (<jats:italic>n</jats:italic>= 3801), showing that averaged over regional scales, normalised terminus change is linear. Regionally linear retreat trends were identified across most sectors of the GrIS starting in the mid-1990s, although in contrast to previous studies, the northeastern sector is shown to have experienced sustained retreat since the mid-1980s. Through cointegration analyses, individual glaciers are shown to have differing sensitivities to potential climate drivers, though on a sector-wide scale the northwest and southeast are shown to be especially sensitive to annual sea surface temperature and June–July–August air temperature, respectively. Although 92% of the analysed glaciers experience retreat across the GrIS, observed increases in absolute flux for the entire ice sheet can be explained by changes in just 11 of these TWGs.</jats:p>

Item Type: Article
Uncontrolled Keywords: Glacier discharge, ice and climate, ice dynamics, ice, ocean interactions
Divisions: Faculty of Science and Engineering > School of Environmental Sciences
Depositing User: Symplectic Admin
Date Deposited: 18 Mar 2021 10:14
Last Modified: 18 Jan 2023 22:55
DOI: 10.1017/jog.2021.13
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