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Weather Condition 3: Must meet all of the following criteria: Severe weather is possible within 24 to 48 hours; Visibility is greater than 300 metres (980 ft) Wind less than or equal to 45 knots (83 km/h; 52 mph) Air temperature and wind chill are above −60 °C (−76 °F) Weather Condition 2: Must meet all of the following criteria:
The AMRC is one of the primary archives of meteorological data from Antarctica and its surrounding geographic areas. [1] The Antarctic Meteorological Forecast Center (AMFC) at UW-Madison was devised during the same time as the founding of the AMRC as a provider of weather forecasts for research vessels operating in the vicinity of Antarctica.
The ACC varies with time. Evidence of this is the Antarctic Circumpolar Wave, a periodic oscillation that affects the climate of much of the southern hemisphere. [7] There is also the Antarctic oscillation, which involves changes in the location and strength of Antarctic winds. Trends in the Antarctic Oscillation have been hypothesized to ...
With detailed weather station and satellite data dating back only about 40 years, scientists wondered whether these events meant Antarctica had reached a tipping point, or a point of accelerated ...
Nearly all of Antarctica is covered by a sheet of ice that is, on average, at least 1,500 m (5,000 ft) thick. Antarctica contains 90% of the world's ice and more than 70% of its fresh water. If all the land-ice covering Antarctica were to melt — around 30 × 10 ^ 6 km 3 (7.2 × 10 ^ 6 cu mi) of ice — the seas would rise by over 60 m (200 ft ...
Parts of icy Antarctica are turning green with plant life as the region is gripped by extreme heat events, new research shows, sparking concerns about the changing landscape on this vast continent.
A 2022 study by Nature noted that when the high is over the Drake Passage, it alongside an elongated cyclone located in the South Pacific transport warm and moist air to the southwestern Antarctic Peninsula, which is linked to record-high temperatures, extreme summertime melt, and dramatic break-ups in the Larsen Ice Shelf and eastern Antarctic ...
The Antarctic Circumpolar Wave (ACW) is a coupled ocean/atmosphere wave that circles the Southern Ocean in approximately eight years at 6–8 cm/s (2.4–3.1 in/s). [1] Since it is a wave-2 phenomenon (there are two ridges and two troughs in a latitude circle ) at each fixed point in space a signal with a period of four years is seen. [ 2 ]