The Totten Glacier, located in the East Antarctica Ice Sheet, is also a major contributor to global sea-level rise. However, the details of how offshore ocean heat reaches the glacier's ice shelf cavity remain elusive. Now, researchers have used data from several sources to provide additional insights on the pathways of warm water that reach the ice shelf. Their findings shed light on the physical processes that control the melting rate of this glacier.
One of the most feared effects of global warming is the rise in sea level caused by the melting of polar continental ice. In fact, polar researchers have been working towards raising the awareness of this impending threat.
The East Antarctic Ice Sheet, which includes the Totten Glacier, is also a significant contributor to ice discharge and global sea-level rise, besides the extensively researched West Antarctic region. The Totten Glacier is grounded below the surface of the ocean and is thought to contain enough ice to cause a global sea-level rise of more than 3.5 meters.
By providing additional insights and defining the pathways of ocean heat transport into the Totten Ice Shelf cavity, a multinational team of researchers have now filled this knowledge gap. The study, led by Assistant Professor Daisuke Hirano from the National Institute of Polar Research , Japan, is published inAssistant Professor Hirano, along with Takeshi Tamura from NIPR, Kazuya Kusahara from Japan Agency for Marine-Earth Science and Technology , Stephen R.
The analyses revealed crucial details on how warm offshore-origin Circumpolar Deep Water interacts with the Totten Ice Shelf and brings in heat, accelerating melting processes. The researchers found that a train of cyclonic eddy currents brings offshoretowards the continental shelf break, where it enters a broad depression on the inner side. This warm water circulates within the depression and finally accesses the cavity of the Totten Ice Shelf, by the means of two large, deep glacial troughs.
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