Weatherstation Pertteli
A forest fire warning is in force in provinces Åland, Varsinais-Suomi and Pirkanmaa.
Wind warning for land areas: The western part of the country, province North Ostrobothnia except in the municipalities of Pudasjärvi, Taivalkoski and Kuusamo and in the municipality of Enontekiö: In the morning, strong winds from south may bring strong gusts of 15 m/s.
Valid: 2016-09-27 10:48 - 2016-09-28 10:48 UTC
Warnings by MeteoAlarm.

North Atlantic Oscillation (NAO)




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Data courtnesy of NOAA/Climate Prediction Center (CPC) .

 

NAO

The North Atlantic oscillation (NAO) is a climatic phenomenon in the North Atlantic Ocean of fluctuations in the difference of atmospheric pressure at sea level between the Icelandic low and the Azores high. Through east-west oscillation motions of the Icelandic low and the Azores high, it controls the strength and direction of westerly winds and storm tracks across the North Atlantic. It is highly correlated with the Arctic oscillation, as it is a part of it.
The NAO was discovered in the 1920s by Sir Gilbert Walker. Unlike the El Niño-Southern Oscillation phenomenon in the Pacific Ocean, the NAO is a largely atmospheric mode. It is one of the most important manifestations of climate fluctuations in the North Atlantic and surrounding humid climates.
The North Atlantic Oscillation is closely related to the Arctic oscillation (AO) or Northern Annular Mode (NAM), but should not be confused with the Atlantic Multidecadal Oscillation (AMO).

Source: Wikipedia


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