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  2. Arctic oscillation - Wikipedia

    en.wikipedia.org/wiki/Arctic_oscillation

    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 ...

  3. How La Niña and Arctic Oscillation will impact East ... - AOL

    www.aol.com/la-ni-arctic-oscillation-impact...

    Arctic Oscillation. Another global feature we want to study and try to forecast is the Arctic Oscillation (AO). This is a climate pattern that helps to determine the shifts in pressure between the ...

  4. Arctic ice pack - Wikipedia

    en.wikipedia.org/wiki/Arctic_ice_pack

    NOAA projected Arctic changes Variation of Arctic sea ice from 1984 to 2019. Younger ice (first-year ice) is shown in darker shades, while older ice (four-year or older) is shown in white. This visual shows the Arctic sea ice change and the corresponding absorbed solar radiation change during June, July, and August from 2000 through 2014.

  5. January–March 2014 North American cold wave - Wikipedia

    en.wikipedia.org/wiki/January–March_2014_North...

    The NOAA's National Climatic Data Center found that since modern records began in 1895, the period from December 2013 through February 2014 was the 34th-coldest such period for the contiguous 48 states as a whole. They also found 91% of the Great Lakes were iced over, the second highest percentage on record. [100]

  6. North Atlantic oscillation - Wikipedia

    en.wikipedia.org/wiki/North_Atlantic_oscillation

    The warming of the air near to the ground leads to rising movements and the atmosphere becomes less stable. One of these patterns is the air pressure difference between the Arctic and mid-latitudes: the Arctic oscillation with the Azores highs and Iceland lows known from the weather reports. If this difference is high, a strong westerly wind ...

  7. 2011–12 North American winter - Wikipedia

    en.wikipedia.org/wiki/2011–12_North_American...

    The CPC noted the significance of the less-predictable Arctic Oscillation, with CPC deputy director Mike Halpert saying, "The erratic Arctic Oscillation can generate strong shifts in the climate patterns that could overwhelm or amplify La Niña's typical impacts." The outlook was broken up into ten regions.

  8. Tacoma, WA Weather - Hourly Forecasts and Local Weather ... - AOL

    www.aol.com/weather/forecast/us/tacoma-12799163

    Maps show NOAA's spring weather outlook across U.S. ... A term used to describe the uncertainties and errors associated with long-term forecasts of the El Nino Southern Oscillation is known as the ...

  9. Polar vortex - Wikipedia

    en.wikipedia.org/wiki/Polar_vortex

    An index which is used in the northern hemisphere to gauge its magnitude is the Arctic oscillation. [20] When the Arctic vortex is at its strongest, there is a single vortex, but normally, the Arctic vortex is elongated in shape, with two cyclone centers, one over Baffin Island in Canada and the other over northeast Siberia.