Table of Contents |
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Introduction
This is a brief introduction of the main request parameter syntax.
Note |
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We recommend that you get familiar with datasets and their availability using http://apps.ecmwf.int/datasets/ You can also get the request syntax using "View MARS request" feature. |
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Syntax
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verb, keyword1 = value1, ... = value2, keywordN = valueN |
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Retrieve example from "View MARS request":
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Python equivalence
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Keyword
In the Dataset service there is an extra mandatory keyword called dataset which does not appear in normal MARS requests.Keyword explanation:
Keyword | definition |
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dataset | See |
Base time (00, 06, 12 and 18)
Observation time (HHMM or HH:MM: ie 09:30)
Specifies the Analysis date, the Forecast base date or Observations date. Formats
- Absolute as YYYY-MM-DD, YYYYMMDD. The day of the year can also be used: YYYY-DDD
- Relative as -n ; n is the number of days before today (i.e., -1 = yesterday )
- Name of month (e.g. january for Climatology data)
- Operational monthly means are retrieved by setting day (DD) to 00.
Determines the type of field to be retrieved:
- Analysis (an)
- Forecast (fc)
- Perturbed Forecast (pf)
- Control Forecast (cf)
Denotes type of level:
- Model level (ml)
- Pressure level (pl)
- Surface (sfc)
- Potential vorticity (pv)
- Potential temperature (pt)
- Depth (dp)
Meteorological parameter. (t, temprerature, 130, 30.128, ...)
Output grid mesh
- Latitude/longitude increments in degrees (2.5/2.5)
- Number of latitude lines from Pole to Equator (160)
Available Datasets | |
format | You can add 'format' : "netcdf" to retrieve the data in NetCDF format. |
the other possible MARS keywords are explained in the MARS keywords documentation.