The Pacific North America Index (PNA Index) describes the differences of the 500 hPa pressure level between the polar and equatorial zones of the Pacific and North America. The pressure difference is very important for the temperature and precipitation situation over North America during winter time.
|Weather observations||Extreme weather||Global temperatures||Current sunspots|
|Water temperature||Extreme heat||Troposphere||Annual solar activity|
|Storm glass||Extreme cold||Weather history||Solar activity since 1700|
|Station Niederlemp||Extreme storms||Climate of the decades||Historical solar activity|
|Station Ziegelhausen||Extreme rain||Climate anomalies||Predicting the sun activity|
|Wind scales||Tropopause||NAO Index||Solar irradiance|
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