Brief communication: The anomalous winter 2019 sea-ice conditions in McMurdo Sound, Antarctica
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Published:2021-10-29
Issue:10
Volume:15
Page:4999-5006
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ISSN:1994-0424
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Container-title:The Cryosphere
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language:en
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Short-container-title:The Cryosphere
Author:
Leonard Greg H.ORCID, Turner Kate E.ORCID, Richter Maren E.ORCID, Whittaker Maddy S., Smith Inga J.
Abstract
Abstract. McMurdo Sound sea ice can generally be partitioned into two regimes: (1) a stable fast-ice cover, forming south of approximately 77.6∘ S around March–April and then breaking out the following January–February, and (2) a more dynamic region north of 77.6∘ S that the McMurdo Sound and Ross Sea polynyas regularly impact. In 2019, a stable fast-ice cover formed unusually late due to repeated break-out events. We analyse the 2019 sea-ice conditions and relate them to a modified storm index (MSI), a proxy for southerly wind events. We find there is a strong correlation between the timing of break-out events and several unusually large MSI events.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
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