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Monthly Means Operational Surface Analysis Data Sets
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This part includes a brief description and the order forms of this specific Data Set.
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Description:
- period supported - July 1985 to current date;
- fields are uninitialised analyses for 0000 UTC, 0600 UTC, 1200 UTC and 1800 UTC each day;
- each parameter is stored as a field of grid point values 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 values represented can be retrieved to an accuracy consistent with the analysis method used;
The changes to this data set are as follows:
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July 1985 |
Internal data representation is in a N80 Gaussian grid (80 lines of latitude between the pole and the equator for each hemisphere, with a regular spacing of 1.125° between points along each latitude row) Fields available are surface pressure, snow depth, MSL pressure, u- and v-components of wind at 10m, 2 metre temperature, 2 metre dewpoint temperature, surface temperature, deep soil temperature, surface soil wetness, deep soil wetness |
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July 1986 |
Field added: albedo |
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October 1991 |
Internal data representation is in a N160 Quasi-regular Gaussian grid (160 lines with varying numbers of points along each row) |
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August 1993 |
Field added: skin temperature Surface temperature, deep soil temperature replaced by soil temperature levels 1, 2, 3 and 4 Surface soil wetness, deep soil wetness replaced by soil wetness levels 1, 2, 3 and 4 |
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April 1995 |
Fields added: total column water, total column water vapour |
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June 2000 |
Fields added: sea ice cover, snow albedo, snow density, sea surface temperature, temperature of snow layer, ice surface temperature layers 1, 2, 3 and 4 Soil wetness levels 1, 2, 3 and 4 replaced by volumetric soil wetness layers 1, 2, 3 and 4 |
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September 2000 |
Field added: total column ozone; the ozone field does not currently use assimilated data. Currently the equations used do not produce the ozone holes at the North and South poles |
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December 2000 |
Internal data representation is in a N256 Quasi-regular Gaussian grid (256 lines between the pole and the equator, with varying numbers of points along each row) |
| February 2006 | Internal data representation is in a N400 Quasi-regular Gaussian grid (400 lines between the pole and the equator, with varying numbers of points along each row) |
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) : |
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26.01.2006 |
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