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Operational Potential
Vorticity Level Analysis Data Set
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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 - 18 July 2000 to current date;
- fields are analyses for 0000 UTC, 0600 UTC, 1200 UTC and 1800 UTC each day;
- 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:
| 18 July 2000 | Internal data representation is a reduced N256 Gaussian grid (256 lines of latitude between the pole and the equator for each hemisphere); Fields available are potential temperature, pressure, geopotential, u- and v-components of horizontal wind, specific humidity and ozone mass mixing ratio. The ozone field is not currently based on any assimilated ozon data. Model deficiencies result in a serious overestimation of ozone in springtime at high latitudes. |
| 12 June 2001 | The model's ozone chemistry is improved in its representation of ozone loss by hetereogeneous processes that leads to the springtime ozone hole over the Antarctic |
| 9 April 2002 | SBUV and GOME data are now assimilated to improve the ozone field. |
| 1 February 2006 | Internal data representation is a reduced N400 Gaussian grid (400 lines of latitude between the pole and the equator for each hemisphere). |
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) : |
 | 26.01.2006 |
 | © ECMWF |
