Assessing the vulnerability of fast ice in McMurdo Sound, Antarctica to winter storms ...
<!--!introduction!--> 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...
| Main Authors: | , , , , |
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.57757/iugg23-2805 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019091 |
| Summary: | <!--!introduction!--> 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. Here we analyse the 2019 sea-ice conditions and relate them to a modified storm index (MSI), a proxy for southerly wind events. We determined there is a strong correlation between the timing of break-out events and several unusually large MSI events and our key finding is that an increase in the frequency of intense winter storms in 2019 resulted in a delayed formation of a stable fast-ice cover. Further, recent observations (post 2019) demonstrate that fast-ice conditions in 2019 were not unique and suggest that the fate of fast ice in the sound may be a symptom of some ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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