Uncovering Polynya: new research out of NYU Abu Dhabi Institute helps unravel a 43-year-old mystery in deep Antarctica
- Polynya is a geographical term that is used to describe an area of unfrozen water surrounded by a large area of sea ice.
- Researchers at the NYU Abu Dhabi Institute have discovered an atmospheric trigger for the occurrence of the Maud-Rise Polynya that appeared in September 2017 in the Lazarev Sea. A much larger Polynya was spotted in the same location in 1974 and may also have had an atmospheric trigger.
- Researchers have found that when intense cyclones occur over the ice pack, a mid-sea Polynya in a preconditioned oceanographic area can be initiated as the cyclonic winds push the ice in opposite directions away from the cyclone center.
- The Maud Rise Seamount preconditions the near-surface ocean waters such that warm, deep water is brought close to the surface above the seamount. A cyclone passing over the seamount, in addition to creating ice divergence, can further enhance the rise of warm, deep water, bringing it to the surface, and thus allowing a Polynya to be sustained.
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