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Regions of rapid sea ice change: An inter-hemispheric seasonal comparison
Citation
Stammerjohn, S and Massom, R and Rind, D and Martinson, D, Regions of rapid sea ice change: An inter-hemispheric seasonal comparison, Geophysical Research Letters, 39, (6) Article L06501. ISSN 0094-8276 (2012) [Refereed Article]
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Copyright Statement
Copyright 2012 American Geophysical Union
Abstract
This bi-polar analysis resolves ice edge changes on
space/time scales relevant for investigating seasonal iceocean
feedbacks and focuses on spatio-temporal changes in
the timing of annual sea ice retreat and advance over 1979/
80 to 2010/11. Where Arctic sea ice decrease is fastest, the
sea ice retreat is now nearly 2 months earlier and subsequent
advance more than 1 month later (compared to 1979/80),
resulting in a 3-month longer summer ice-free season. In
the Antarctic Peninsula and Bellingshausen Sea region, sea
ice retreat is more than 1 month earlier and advance 2 months
later, resulting in a more than 3-month longer summer icefree
season. In contrast, in the western Ross Sea (Antarctica)
region, sea ice retreat and advance are more than 1 month
later and earlier respectively, resulting in a more than
2 month shorter summer ice-free season. Regardless of trend
magnitude or direction, and at latitudes mostly poleward of
70° (N/S), there is strong correspondence between anomalies
in the timings of sea ice retreat and subsequent advance,
but little correspondence between advance and subsequent
retreat. These results support a strong ocean thermal feedback
in autumn in response to changes in spring sea ice
retreat. Further, model calculations suggest different net
ocean heat changes in the Arctic versus Antarctic where
autumn sea ice advance is 1 versus 2 months later. Ocean-atmosphere
changes, particularly in boreal spring and austral
autumn (i.e., during ~March-May), are discussed and compared,
as well as possible inter-hemispheric climate connections.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Antarctic, Arctic, sea ice, climate change, variability |
| Research Division: | Earth Sciences |
| Research Group: | Physical geography and environmental geoscience |
| Research Field: | Glaciology |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the earth sciences |
| UTAS Author: | Massom, R (Dr Robert Massom) |
| ID Code: | 78806 |
| Year Published: | 2012 |
| Web of Science® Times Cited: | 347 |
| Deposited By: | CRC-Antarctic Climate & Ecosystems |
| Deposited On: | 2012-07-27 |
| Last Modified: | 2017-10-30 |
| Downloads: | 5 View Download Statistics |
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