In order to analyse and validate the bulk SSTs estimated at the Met Office
from brightness temperatures recorded by the AATSR instrument in near-real
time, various time series are compiled for the following regions:
Global: 180W to 180E, 90S to 90N
UK waters: 20W to 10E, 40N to 60N
Elnino: 150W to 90W, 5S to 5N
Tropics: 180W to 180E, 20S to 20N
West Pacific: 140E to 180E, 10S to 10N
North Atlantic: 40W to 15W, 40N to 60N
Only SSTs which pass certain quality control tests are included in
these analyses: they must be deemed to not be cloud contaminated,
tests against the number of pixels contributing to each cell, and from
threshold tests against climate datasets. Checks are also performed
test for the presence of ice in the cell, with positive results rejected.
Finally, a mean global offset is added to the SST, differing for
2-channel and 3-channel retrievals, to correct for mean biases observed
between the retrieval algorithms and against in situ SST data.
The daily number of global AATSR skin SSTs within the ESA Meteo
product are displayed, including the daily number of 2-channel
daytime and 3-channel night-time SSTs.
The 10 arc minute AATSR sea surface temperatures are averaged
to a 1 degree resolution. Time series for
the mean and number of 1 degree SSTs are displayed for
each of the defined regions.
The mean SST plots display both skin SST and bulk SST (corrected
for the skin effect) observations estimated at the Met Office.
dual-view, 2-channel retrieval algorithm at day and night, and
a dual-view, 3-channel retrieval algorithm for night time
observations only. The bulk SSTs are included when a good skin
delta-T (the modelled difference between the skin and bulk SSTs)
has been calculated.
Additionally, time series of the skin SST within the Meteo
product minus the skin SST estimated at the Met Office, and of
the 2-channel bulk SST minus the Met Office's NWP SST are