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The greatest negative value for the Arctic oscillation since 1950 in January was −3.767 in 1977, which coincided with the coldest mean January temperature in New York City, Washington, D.C., Baltimore, and many other mid-Atlantic locations in that span of time, although the January Arctic oscillation has been negative only 60.6% of the time ...
Major changes in the precipitation regime, such as the shift of the Intertropical Convergence Zone to the south, increased rainfall in North America, and the drying of South America and Europe, occurred. [63]: 1148 Global temperatures again barely changed during the Younger Dryas and long-term, post-glacial warming resumed after it ended. [60]
The North American Arctic is composed of the northern polar regions of Alaska (USA), Northern Canada and Greenland. [1] Major bodies of water include the Arctic Ocean, Hudson Bay, the Gulf of Alaska and North Atlantic Ocean. [2] The North American Arctic lies above the Arctic Circle. [3] It is part of the Arctic, which is the northernmost ...
A brutal blast of bitterly cold arctic air engulfed the central states and spread further south and east to end the week. As the cold hung on, we saw additional daily record temperatures set from ...
The cold blob in the North Atlantic (also called the North Atlantic warming hole [2] [3]) describes a cold temperature anomaly of ocean surface waters, affecting the Atlantic Meridional Overturning Circulation (AMOC) which is part of the thermohaline circulation, possibly related to global warming-induced melting of the Greenland ice sheet.
An outbreak of arctic cold is sweeping through the Midwest and East, as well as into the Deep South and this frigid pattern is expected to last into the third week of January. Where the cold is ...
Cold subsides when the vortex restabilizes and drives the arctic air back north. January’s freeze-out comes after December started cold, but finished out unusually warm across most of the country.
An example of positive PNA (left) and negative PNA (right), based on anomalies in the geopotential height of the 500 hPa pressure level. The Pacific–North American teleconnection pattern (PNA) is a large-scale weather pattern with two modes, denoted positive and negative, and which relates the atmospheric circulation pattern over the North Pacific Ocean with the one over the North American ...