News Stories

Tag: climate change

Iceberg A-80D Has Calved from Iceberg A-80A in the Weddell Sea
February 27, 2023 — The U.S. National Ice Center (USNIC) has confirmed that iceberg A-80D (figure 1, below) calved from iceberg A-80A in the Weddell Sea. As of February 24, A-80A was centered at 72°02' South and 59°17' West and measured 12 nautical miles on its longest axis and 8 nautical miles on its widest axis. A-80D was centered at 72°11' South and 59°20' West and measured 7 nautical miles on its longest axis and 5 nautical miles on its widest axis. The initial break was seen in satellite imagery on 24 February. A-80A first calved from the Larsen-D Ice Shelf in November 2022 along with A-80B and A-80C. A-80B and A-80C are no longer large enough to track... MORE

As Climate Shifts, U.S. Navy Focuses on Bolstering Arctic Ocean Operations
February 22, 2023 — First in a two-part series on how the Navy and its partners are working to improve Arctic operations as the sea ice melts due to warming temperatures. The Arctic is the next frontier for U.S. military operations, where the physical environment poses a major threat to achieving strategic dominance, managing assets and ensuring freedom of the seas. The importance of the Arctic will only increase each year as the decline of the perennial sea ice continues and the ice edge shifts. It is imperative to strengthen the ability to operate there in order to gain a strategic advantage. Effective operations will hinge on reliable environmental intelligence in a region where conditions can be severe. The U.S. most recently updated its strategy for the Arctic region last October with a new 10-year scope that seeks a peaceful, stable, prosperous and cooperative Arctic at the same time acknowledging strategic competition with Russia and China. Ongoing efforts include investing in technology that detects and tracks potential threats and improves our own capabilities to maneuver in the region. This is not a simple task due to the dominant role that Russia has in the Arctic, as well as the growing concern for China’s desire to be an influential nation there... MORE

NPS Researchers Leave a Lasting Legacy in Climate Analysis and Prediction
July 6, 2022 — The analysis of global patterns can help scientists develop predictions about the conditions a specific region might experience in the coming weeks, months or years. One method they do this is by looking for precursor conditions in the ocean and atmosphere that might be indicators of what’s to come in the region. For his 2021 doctoral thesis at the Naval Postgraduate School (NPS), U.S. Navy Lt. Cmdr. Kellen Jones wanted to see if there were large-scale climate events that serve as precursors to Santa Ana winds, which can lead to devastating wildfires in Southern California. “We focused on looking at 164 different Santa Ana winds from 1979 to 2018, and we were able to determine what that weather pattern looks like across the globe,” Jones recalls. “We found a very unique signature … a unique thumbprint in the global climate system that occurs during and also before seeing a Santa Ana wind event.” He and his advisor Dr. Tom Murphree, now a research associate professor emeritus in NPS’ Department of Meteorology, used machine learning and other methods to determine the related events that took place in the tropics and the Indian Ocean before Santa Ana winds materialized in California... MORE

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