Late Holocene ice-mass changes recorded in a relative sea-level record from Joinville Island, Antarctica
Late Holocene ice-mass changes recorded in a relative sea-level record from Joinville Island, Antarctica
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南极洲茹恩维尔岛相对海平面记录中记录的全新世晚期冰块变化
DOI:
10.1130/g46649.1
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发表时间:
2019
期刊:
影响因子:
5.8
通讯作者:
Simms, Alexander R.
中科院分区:
文献类型:
--
作者:
Zurbuchen, Julie;Simms, Alexander R.
Recent ice-mass loss driven by warming along the Antarctic Peninsula has resulted in rapid changes in uplift rates across the region. Are such events only a function of recent warming? If not, does the Earth response to such events last long enough to be preserved in Holocene records of relative sea level (RSL), and thus have a bearing on global-scale glacial isostatic adjustment (GIA) models (eg ICE-6G)? Answering such questions in Antarctica is hindered by the scarcity of RSL reconstructions within the region. Here, a new RSL reconstruction for Antarctica is presented based on beach ridges from Joinville Island on the Antarctic Peninsula. We find that RSL has fallen 4.9±0.58 m over the past 3100 yr, and that the island experienced a significant increase in the rate of RSL fall from 1540±125 cal.(calibrated) yr BP to 1320±125 cal. yr BP This increase in the rate of RSL fall is likely due to the viscoelastic response of the solid Earth to terrestrial ice-mass loss from the Antarctic Peninsula, similar to the Earth response experienced after ice-mass loss following acceleration of glaciers behind the collapsed Larsen B ice shelf in 2002 CE Additionally, slower rates of beach-ridge progradation from 695±190 cal. yr BP to 235±175 cal. yr BP potentially reflect erosion of beach ridges from a RSL rise induced by a local glacial advance. The rapid response of the Earth to minor ice-mass changes recorded in the RSL record further supports recent assertions of a more responsive Earth to glacial unloading and at time scales relevant for GIA of Holocene and Pleistocene sea levels. Thus, current continental and global GIA models may not accurately capture the ice-mass changes of the Antarctic ice sheets at decadal and centennial time scales.
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DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
S. Brachfeld;E. Domack;C. Kissel;C. Laj;A. Leventer;S. Ishman;R. Gilbert;A. Camerlenghi;L. Eglinton
通讯作者:
L. Eglinton
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
L. Simkins;Alexander R. Simms;R. DeWitt
通讯作者:
R. DeWitt
影响因子:
5.3
作者:
Nield, Grace A.;Barletta, Valentina R.;Berthier, Etienne
通讯作者:
Berthier, Etienne
影响因子:
3.9
作者:
S. Lindhorst;Ilona Schutter
通讯作者:
Ilona Schutter
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
E. Domack;T. Mashiotta;L. A. Burkley;S. Ishman
通讯作者:
S. Ishman