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Hurrell North Atlantic Oscillation (NAO) Index (Station-Based)
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...- dataset NetCDF
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Hurrell Wintertime SLP-based Northern Annular Mode (NAM) Index
The NAM (or Arctic Oscillation) is defined as the first EOF of NH (20°-90°N) winter SLP data. It explains 23% of the extended winter mean (December-March) variance, and it is...- dataset NetCDF
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Hurrell North Atlantic Oscillation (NAO) Index (PC-Based)
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...- dataset NetCDF
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North Pacific (NP) Index by Trenberth and Hurrell; Monthly and Winter
The North Pacific Index (NP index or NPI) is the area-weighted sea level pressure over the region 30°N-65°N, 160°E-140°W. The NP index is defined to measure interannual to...- dataset NetCDF
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High Altitude Observatory (HAO) Solar Eclipse Archive
The High Altitude Observatory (HAO) Eclipse Archive from the National Center for Atmospheric Research is an archive consists of solar eclipse images, which are deemed to be of...- image Image
