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Title: Exploring the sensitivity of global ocean circulation to future ice loss from Antarctica

Abstract

The sensitivity of the global ocean circulation and climate to large increases in iceberg calving and meltwater discharges from the Antarctic Ice Sheet (AIS) are rarely studied and poorly understood. The requirement to investigate this topic is heightened by growing evidence that the West Antarctic Ice Sheet (WAIS) is vulnerable to rapid retreat and collapse on multidecadal-to-centennial timescales. Observations collected over the last 30 years indicate that the WAIS is now losing mass at an accelerated and that a collapse may have already begun in the Amundsen Sea sector. In addition, some recent future model simulations of the AIS show the potential for rapid ice sheet retreat in the next 50 – 300 years. Such a collapse would be associated with the discharge of enormous volumes of ice and meltwater to the Southern Ocean. This project funds PI Condron to begin assessing the sensitivity of the global ocean circulation to projected increases in meltwater discharge and iceberg calving from the AIS for the next 50 – 100 years. A series of climate model simulations will determine changes in ocean circulation and temperature at the ice sheet grounding line, the role of mesoscale ocean eddies in mixing and transporting freshwater awaymore » from the continent to deep water formation regions, and the likely impact on the northward transport of heat to Europe and North America.« less

Authors:
 [1]
  1. Univ. of Massachusetts, Amherst, MA (United States); Woods Hole Oceanographic Institution (WHOI), Woods Hole, MA (United States)
Publication Date:
Research Org.:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23). Climate and Environmental Sciences Division
OSTI Identifier:
1420141
Report Number(s):
DOE-UMASS-16105
DOE Contract Number:
SC0016105
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Condron, Alan. Exploring the sensitivity of global ocean circulation to future ice loss from Antarctica. United States: N. p., 2017. Web. doi:10.2172/1420141.
Condron, Alan. Exploring the sensitivity of global ocean circulation to future ice loss from Antarctica. United States. doi:10.2172/1420141.
Condron, Alan. Sat . "Exploring the sensitivity of global ocean circulation to future ice loss from Antarctica". United States. doi:10.2172/1420141. https://www.osti.gov/servlets/purl/1420141.
@article{osti_1420141,
title = {Exploring the sensitivity of global ocean circulation to future ice loss from Antarctica},
author = {Condron, Alan},
abstractNote = {The sensitivity of the global ocean circulation and climate to large increases in iceberg calving and meltwater discharges from the Antarctic Ice Sheet (AIS) are rarely studied and poorly understood. The requirement to investigate this topic is heightened by growing evidence that the West Antarctic Ice Sheet (WAIS) is vulnerable to rapid retreat and collapse on multidecadal-to-centennial timescales. Observations collected over the last 30 years indicate that the WAIS is now losing mass at an accelerated and that a collapse may have already begun in the Amundsen Sea sector. In addition, some recent future model simulations of the AIS show the potential for rapid ice sheet retreat in the next 50 – 300 years. Such a collapse would be associated with the discharge of enormous volumes of ice and meltwater to the Southern Ocean. This project funds PI Condron to begin assessing the sensitivity of the global ocean circulation to projected increases in meltwater discharge and iceberg calving from the AIS for the next 50 – 100 years. A series of climate model simulations will determine changes in ocean circulation and temperature at the ice sheet grounding line, the role of mesoscale ocean eddies in mixing and transporting freshwater away from the continent to deep water formation regions, and the likely impact on the northward transport of heat to Europe and North America.},
doi = {10.2172/1420141},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Sep 30 00:00:00 EDT 2017},
month = {Sat Sep 30 00:00:00 EDT 2017}
}

Technical Report:

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