Climate data guide content with tag NAO
Hurrell North Atlantic Oscillation (NAO) Index (PC-based)
Years of record
- to
The principal component (PC)-based indices of the North Atlantic Oscillation (NAO) are the time series of the leading Empirical Orthogonal Function (EOF) of SLP anomalies over the Atlantic sector, 20°-80°N, 90°W-40°E. These indices are used to measure the NAO throughout the year, tracking the seasonal movements of the Icelandic low and Azores high. These movements…
-
Formats
- ascii
-
Timestep
- Monthly, Seasonal, Annual
-
Domain
- Atlantic Ocean
-
Collections
- Climate Analysis Section (CAS) Data Catalog
Experts contributing reviews
- Hurrell, James, Phillips, Adam
Hurrell North Atlantic Oscillation (NAO) Index (station-based)
Years of record
- to
The winter (December thru March) station-based index of the NAO is based on the difference of normalized sea level pressure (SLP) between Lisbon, Portugal and Stykkisholmur/Reykjavik, Iceland since 1864. Positive values of the NAO index are typically associated with stronger-than-average westerlies over the middle latitudes, more intense weather systems over…
-
Formats
- ascii
-
Timestep
- Monthly, Seasonal, Annual
-
Domain
- Atlantic Ocean
-
Collections
- Climate Analysis Section (CAS) Data Catalog
Experts contributing reviews
- Hurrell, James, Phillips, Adam