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Climate Fact Of The Day – NASA: Warm Ocean Currents Cause Majority of Ice Loss from Antarctica
NASA – Warm ocean currents attacking the underside of ice shelves are the dominant cause of recent ice loss from Antarctica, a new study using measurements from NASA’s Ice, Cloud, and land Elevation Satellite (ICESat) revealed.
An international team of scientists used a combination of satellite measurements and models to differentiate between the two known causes of melting ice shelves: warm ocean currents thawing the underbelly of the floating extensions of ice sheets and warm air melting them from above. The finding, published today in the journal Nature, brings scientists a step closer to providing reliable projections of future sea level rise.
The researchers concluded that 20 of the 54 ice shelves studied are being melted by warm ocean currents. Most of these are in West Antarctica, where inland glaciers flowing down to the coast and feeding into these thinning ice shelves have accelerated, draining more ice into the sea and contributing to sea-level rise. This ocean-driven thinning is responsible for the most widespread and rapid ice losses in West Antarctica, and for the majority of Antarctic ice sheet loss during the study period. Read Article
Editorial Comment – This really makes all the hype over the now discredited Steig et al. paper, which attempted to establish an air temperature warming trend as one of the possible causes for “Antarctic melting”, only to have the Mannian PCA math they used shot down in flames for smearing data from the Antarctic Peninsula all over the continent, look even weaker.
Tags: Arctic Antarctica, climate, oceans water
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