Temperature, Geo-Potential Height and Wind Fields at Isobaric Surfaces from the European Centre for Medium-Range Weather Forecasting

The temperature, geopotential height and wind fields are used for
European stratospheric ozone research projects, such as EASOE and SESAME
as well as other EU funded projects.

The data are extracted from the ECMWF MARS archive.

There are data for 12 UT every day from early November through April
starting Nov. 1991.

The data are transferred to NILU through the Norwegian Meteorological
Institute.

Data are ANALYSES (forecast hrs = 0) or FORECASTS of the isobaric
meteorological parameters given above.
Data are stored in the NASA Ames format number 3010 and are organized the
following way:

The first data line after the header is a line containing the first value
of the independent variable (1000 hPa) followed by the auxilliary
variables.

This line is then followed by a block of 250 lines containing the 3600
geopotential heights in the format 15I5.
Immediately after this block follows a new block with the temperatures,
then a block with u-wind and a block with v-wind.

After these four data blocks comes a line with the next value of the
independent variable (850 hPa) followed by the auxilliary variables. This
line is then followed by the same four data blocks as described above. This
pattern is repeated for 700, 500, 400, 300, 200, 150, 100, 70, 50, 30 and
10 hPa.

The data are on a 2.5x2.5 degree longitude/latitude grid starting at-177.5
degrees east and 90 degrees north. The longitude is the most rapidly
varying variable, which means that the second element is at
-175.0 degrees east and 90 degrees north and so on.

The last element of each block is the value at 177.5 degrees east and 30
degrees north.

The geographical position of element (i,j) in the matrix can be calculated
as follows:

Longitude = -177.5 + 2.5*(i-1) i=1,2,...,144
Latitude = 90.0 - 2.5*(j-1) j=1,2,..., 25

Data Set Progress: Ongoing (approximately yearly update)