The sense of propagation comes from following anomalies of similar sign from one map to the next in these animation sequence. Yellow-to-red (blue) colors indicates positive (negative) anomalies, with contours at intervals of 0.5 hPa for SLP anomalies and 0.5℃ for ST anomalies.
Figure 4a. Time sequences and corresponding spatial patterns for the first mode of the EOF for interdecadal GISST SST and NCAR winter SLP anomalies for the 90-year period from 1900 to 1989. The former extend from 40°S to 60°N, while the latter are confined to the northern hemisphere from 20° to 80°N. Negative weights are shaded; positive weights are unshaded. Magnitudes of interdecadal temperature anomalies can be recovered by multiplying the time-varying amplitude by spatial weights at each geographical location.
Figure 4b. (Left) Time sequences and corresponding spatial patterns for the first mode of the EOF for interdecadal GISST SST and SIO winter SLP anomalies for the nominal 40-year period from 1955 to 1994. These two data sets extend from 40｡? to 60｡?. (Right) Same as above but for the second mode of the EOF for interdecadal GISST SST and SIO winter SLP anomalies for the nominal 40-year period from 1955-1994. Negative weights are shaded; positive weights are unshaded. Magnitudes of interdecadal temperature anomalies can be recovered by multiplying the time-varying amplitude by spatial weights at each geographical location.
Figure 4c. Time sequences of maps for interdecadal-filtered GISST SST and SIO winter SLP anomalies for the 11 years from 1974-1984. The color bar gives contour intervals ranging over ±0.5℃ and ±1.5 hPa.
Figure 5a. The proposed distribution of ARGO floats over the global ocean, approximately 3000 floats in all with average separation of 2° latitude and longitude. Each float will profile temperature and salinity in the upper 1000 m of ocean every 10 days for 5 years.
Figure 5b. The present distribution of temperature profiles over the global ocean for April 1999, consisting of 3735 observations from the Volunteer Observing Ship XBT program and from the TOGA TAO thermistor array.
