MARS

This keyword makes the selection between observations, images or fields, and determines some of the valid remaining keywords of the request. A full list of ECMWF types is available online.

type=<value>

For fields type can be e.g. analysis (an), forecast (fc), perturbed forecast (pf), control forecast (cf) and will retrieve data in GRIB format. Many other types will retrieve fields, and will need additional keywords related to fields. For example, note that a forecast field will need keyword step, a perturbed forecast will need keyword number, and so on.

Examples:

For observations the type can be e.g. observations (ob), feedback (fb), analysis Input (ai) or analysis feedback (af) will retrieve BUFR data, and the request will need additional keywords related to observations. Satellite images are coded in GRIB, and they are retrieved using type=im. 

Examples:

For ODB data the type can be e.g. ofb (ODB observation feedback), mfb (monitoring feedback) or oai (ODB analysis input).

Examples:

Dissemination

Specifies the type of field.

type=<value>

This keyword makes the selection between observations, images or fields, and determines some of the valid remaining keywords of the request. Examples of field types are: Analysis (an), forecast (fc), perturbed forecast (pf), control forecast (cf). Many other types will retrieve fields, and will need keywords related to fields. For example, note that a forecast field will need keyword step, a perturbed forecast will need keyword number, and so on. A list of ECMWF types is available online.

Examples: