Research brief: How sea surface temperature changes daily in Tropical Warm Pool
Submitted by astone on Mon, 02/20/2017 - 14:55
Five year (2010–2014) Advanced Very High Resolution Radiometer (AVHRR) sea surface temperature (SST) data produced by the Australian Bureau of Meteorology has been validated against drifting buoy data and then used to study the seasonal patterns of the sea surface temperature daily variation (DV) events over the Tropical Warm Pool region (TWP, 25°S–15°N, 90°E–170°E).
The drifting buoy validation results illustrate the overall good quality of the AVHRR SST data set, although an average 0.19 K underestimation of the daytime measurements was observed.
The nighttime observations are in good agreement with in situ buoys with an average bias of 0.03 and a 0.30 K standard deviation of the biases.
This sea surface temperature data set was then used to characterize the SST DV seasonal patterns, together with wind speeds, daily maximum solar shortwave insolation (SSImax), and latent heat flux (LHF).
A double-peak seasonal pattern of SST DV is observed over the study region: the strongest DVs are found in March and October and the weakest in June.
Sensitivity tests of DV to wind, SSImax, and LHF were then conducted. The results indicate:
Paper: Seasonal patterns of SST diurnal variation over the Tropical Warm Pool region.