What Signals Are Removed and Retained by Using an Anomaly Field in Climatic Research?
Figure 5
Climatological SST (minus 25.8°C) in the Nino3 region (150°W–90°W, 5°S-5°N). The climatological mean SST (red) is calculated from the detrended Nino3 SST time series from 1950 to 2007. The climatological mean SST is fitted to an annual cycle with the form of where year (black). A semiannual cycle is shown in the difference between the climatological mean SST and the fitted annual cycle (blue).
