The recent rebound of shelf water salinity in the Ross Sea induced by atmospheric forcing ...
<!--!introduction!--> Intense atmosphere-ocean-ice interactions in the Ross Sea produce the most saline dense shelf waters around the Antarctic, supplying the lower limb of the global overturning circulation. Over the last 50 years, freshening in the Ross Sea shelf water contributed to a decre...
| 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/iugg23-0061 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017034 |
| Summary: | <!--!introduction!--> Intense atmosphere-ocean-ice interactions in the Ross Sea produce the most saline dense shelf waters around the Antarctic, supplying the lower limb of the global overturning circulation. Over the last 50 years, freshening in the Ross Sea shelf water contributed to a decrease in Antarctic Bottom Water (AABW) formation. The recent rebound of shelf water salinity in the Ross Sea since 2012 has been observed and suggested to be driven by wind anomalies. However, lack of observation on the continental shelf prevents a quantitative assessment of shelf water salinity response to wind and other atmospheric forcing. Here, we design perturbation experiments to investigate the causes of the observed salinity rebound using a global ocean-sea ice model. Our results show the recent salinity rebound in the whole water column (0-900 m) of the western Ross Sea was supplied by brine rejection from the surface through convection, which is induced by increased sea ice formation. We further find this ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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