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This part includes a brief description
and the order forms of the TOGA Basic Level III-A Upper Air
Data Set. Description : - These data sets contain uninitialised
analysis values interpolated to a 2.5° x 2.5° regular latitude/longitude
grid. This grid is co-located with the 5° x 5° and 2.5° x 2.5°
grids used for ECMWF data distribution daily on the Global Telecommunications
System (GTS).
- period supported - 1 January 1985 to current date;
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fields are uninitialised analyses for 0000 UTC and 1200 UTC each day;
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each parameter at each level is stored as a field of grid point values on a 2.5°
x 2.5° regular rectangular mesh in latitude rows starting at the north and
working southwards; within each row values run from west to east starting at the
0° meridian;
- data are stored in FM 92 GRIB using sufficient bits to
ensure that the grid point values can be retrieved to an accuracy consistent with
the analysis methods used;
- production of the archive has been made as
automatic as possible using techniques which enable the data sets to be updated
monthly.
The Upper-Air Data Set contains
:
| 1
January 1985 | 14 standard pressure levels,
1000, 850, 700, 500, 400, 300, 250, 200, 150, 100, 70, 50, 30 and 10 hPageopotential,
temperature, vertical velocity, u- and v-components of horizontal wind, and relative
humidity at each level |
| 1 January 1992 | pressure
level, 925 hPa added | | 1
April 1999 | pressure levels 20, 7, 5, 3, 2 and 1 hPa added
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Order forms :If you wish to make an order
from this data set please download the following two Acrobat (PDF) files :
| 1. Instructions and Standard Order forms (common
for all data sets): |
24 KB | | | | 2. Data
Set Order form (to select data from this specific data set only) : |
8 KB
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