In response to a user request we have extracted two months worth of additional forecast products for ERA-40. This data has been the object of a study examining how the model forecasts handle the quantification and distribution of moisture-related fields.

These additional forecasts have been extracted for the months of January and July 1985 and consist of the following:

**N80 Reduced Gaussian Gridded Model Level Forecast data (ggfm):**

Data is located under the 01 (January) and 07 (July) sub-directories of:`http://badc.nerc.ac.uk/cgi-bin/data_browser/data_browser/badc/ecmwf-e40/data/gg/fm/1985`**Available Parameters**- 130 - t - Temperature (K).
- 133 - q - Specific Humidity (kg/kg).
- 135 - w - Vertical Velocity (Ps s**-1).
- 138 - vo - Vorticity (relative) (s**-1).
- 152 - lnsp - Log Surface Pressure (-).
- 203 - o3 - Ozone Mass Mixing Ratio (kg/kg).
- 246 - clwc - Cloud Liquid Water Content (kg/kg).
- 247 - ciwc - Cloud Ice Water Content (kg/kg).
- 248 - cc - Cloud Cover (0-1).

**N80 Reduced Gaussian Gridded Pressure Level Forecast data (ggfp):**

Data is located under the 01 (January) and 07 (July) sub-directories of:`http://badc.nerc.ac.uk/cgi-bin/data_browser/data_browser/badc/ecmwf-e40/data/gg/fp/1985`**Available Parameters**- 60 - pv - Potential Vorticity (m**2 s**-1 K).
- 130 - t - Temperature (K).
- 133 - q - Specific Humidity (kg/kg).
- 135 - w - Vertical Velocity (Ps s**-1).
- 138 - vo - Vorticity (relative) (s**-1).
- 155 - d - Divergence (s**-1).
- 203 - o3 - Ozone Mass Mixing Ratio (kg/kg).

**N80 Reduced Gaussian Gridded Single Level Forecast data (ggfs):**

Data is located under the 01 (January) and 07 (July) sub-directories of:`http://badc.nerc.ac.uk/cgi-bin/data_browser/data_browser/badc/ecmwf-e40/data/gg/fs/1985`**Available Parameters**- 164 - tcc - Total Cloud Cover (0-1).

**T159 Spectral Model Level Forecast data (spfm):**

Data is located under the 01 (January) and 07 (July) sub-directories of:`http://badc.nerc.ac.uk/cgi-bin/data_browser/data_browser/badc/ecmwf-e40/data/sp/fm/1985`**Available Parameters**- 130 - t - Temperature (K).
- 133 - q - Specific Humidity (kg/kg).
- 135 - w - Vertical Velocity (Ps s**-1).
- 138 - vo - Vorticity (relative) (s**-1).
- 152 - lnsp - Log Surface Pressure (-).
- 155 - d - Divergence (s**-1).
- 203 - o3 - Ozone Mass Mixing Ratio (kg/kg).
- 246 - clwc - Cloud Liquid Water Content (kg/kg).
- 248 - cc - Cloud Cover (0-1).

**T159 Spectral Pressure Level Forecast data (spfp):**

Data is located under the 01 (January) and 07 (July) sub-directories of:`http://badc.nerc.ac.uk/cgi-bin/data_browser/data_browser/badc/ecmwf-e40/data/sp/fp/1985`**Available Parameters**- 60 - pv - Potential Vorticity (m**2 s**-1 K).
- 130 - t - Temperature (K).
- 133 - q - Specific Humidity (kg/kg).
- 135 - w - Vertical Velocity (Ps s**-1).
- 138 - vo - Vorticity (relative) (s**-1).
- 155 - d - Divergence (s**-1).
- 157 - r - Relative Humidity (%).
- 203 - o3 - Ozone Mass Mixing Ratio (kg/kg).

Details of other parameters is also available.

The files are located in the following locations:

`http://badc.nerc.ac.uk/cgi-bin/data_browser/data_browser/badc/ecmwf-e40/data/GG/fL/1985/MM/DD/GGfL1985MMDDHHPPP_FFh.grb`

Where:

**GG** is the grid type (gg=Gaussian; sp=Spectral),
**L** is the level type (m=model, p=pressure, s=single/surface),
**MM** is the month,
**DD** is the day,
**HH** is the hour (of the analysis or forecast start time),
**PPP** is the character parameter code and
**FF** is the 2-digit forecast step (or forecast valid time) in hours.