**Presented
here are figures of valid in situ observations of SST, SLP, air temp,
wind speed/direction, dew point and cloud cover as obtained from ships,
moored and drifting buoys. To see a time-series, click times-series, the
minimum number of observations per 5x5 degree grid box, the variable and
set the year menu to "Time Series." For a global view by year, click shaded
figure, minimum number of observations, the variable and the year from
the drop down menu. If you get a page with no figure, you may have setup
the figure constraints wrong. **

*NOTE:*
Accuracy weighted ship observational density measurements are included
in the source options, but are only applied to SST observations. These
accuracy weighted ship observational measurments were computed by adjusting
the ship observational density by the relative accuracy of ships. A 1/6
scaling factor is used, since the RMS from ship observations is 2.5 that
from buoy observations *[Reynolds, personal communication 2003].*