Parameter Tree:
EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > SEA SURFACE TEMPERATURE INDICES > NORTH TROPICAL ATLANTIC INDEX

Definition:
The timeseries of SST anomalies averaged over 60W to 20W, 6N to 18N and 20W to 10W, 6N to 10N map. Data is obtained from the COADS dataset for 1951-1991 and NCEP afterwards. Anomalies were calculated relative to the 1951-2000 climatology, smoothed by three months running mean procedure and projected onto 20 leading EOFs. Month of data is the center of the 3 months that are smoothed. More information and the indexes forecasted values are available.

Reference:
Earth Systems Research Laboratory, Physical Sciences Division, NOAA, http://www.esrl.noaa.gov/psd/data/climateindices/list/#NTA

Penland, C., and L. Matrosova, 1998: "Prediction of tropical Atlantic sea aurface temperatures using Linear Inverse Modeling," J. Climate, March, 483-496 pp.