Fill in the coordinates of the point or region you want a time series
for. Degrees west or south are indicated by a negative number. Digits
after a decimal point are accepted, minutes and seconds are not.
To obtain a grid point, fill out only one latitude and one
longitude and select [halfway grid points]. This gives the grid point
nearest to the point given.
Selecting [interpolated] with only one latitude and one longitude
gives a simple bilinear interpolation. You can restrict the
interpolation to land points or sea points only if the land/sea mask is
By filling out two coordinates you request the area average between
these coordinates. Only whole grid points are supported at the
moment, the option [half-way between grid points].
The coordinates should be entered in ascending order, so -60°E to
-30°E defines an area of 30° longitude, but -30°E to -60°E
defines an arrea of 330° longitude. As a convenience, the latitudes are
swapped if they are entered in the wrong order.
The actual coordinates used are always mentioned in the caption of the next
page. These are normalised to be in ascending order and give the boundaries of
the grid boxes used in the computation.