ET₀ is commonly used to estimate the required irrigation for plants. Based on FAO-56 Penman-Monteith equationsĮT₀ is calculated from temperature, wind speed, humidity and solar radiation. Please consult theĮCMWF IFS documentation for more information on how wind gusts are parameterized in weather models.ĮT₀ Reference Evapotranspiration of a well watered grass field. Wind gusts in CERRAĪre defined as the maximum wind gusts of the preceding hour. Gusts at 10 meters above ground of the indicated hour. Wind direction at 10 or 100 meters above ground Wind speed at 10 or 100 meters above ground. This is equal to the totalĭirect solar radiation as average of the preceding hour on the horizontal plane and theĭiffuse solar radiation as average of the preceding hour Shortwave solar radiation as average of the preceding hour. Low level clouds and fog up to 2 km altitude 7 cm snow = 10 mm precipitation water equivalent Snowfall amount of the preceding hour in centimeters. Only liquid precipitation of the preceding hour including local showers and rain from If precipitation data is summed up to monthly sums, there mightīe small inconsistencies with the total precipitation amount. Total precipitation (rain, showers, snow) sum of the preceding hour. Typically pressure on mean sea level is used in meteorology. Relative humidity at 2 meters above groundĭew point temperature at 2 meters above groundĪpparent temperature is the perceived feels-like temperature combining wind chillįactor, relative humidity and solar radiationĪtmospheric air pressure reduced to mean sea level (msl) or pressure at surface. Some variables like precipitation are calculatedįrom the preceding hour as and average or sum. Most weather variables are givenĪs an instantaneous value for the indicated hour. The parameter &hourly= accepts the following values. For API stability, no required parameters will SeeĪdditional optional URL parameters will be added. Server URL requires the prefix customer. Only required to commercial use to access reserved API resources for customers. Similar elevation to the requested coordinates using a 90-meter digital elevation Set a preference how grid-cells are selected. Is supported If auto is set as a time zone, the coordinates will be automatically If timezone is set, all timestamps are returned as local-time and data is Utc_offset_seconds again to get the correct date.
Please note that all time is then in GMT+0! For daily values with unix If format unixtime is selected, all time values are returned in UNIX epoch Other wind speed speed units: ms, mph and kn If fahrenheit is set, all temperature values are converted to Fahrenheit. Ifĭaily weather variables are specified, parameter timezone is required. Values can beĬomma separated, or multiple &daily= parameter in the URL can be used. &hourly= parameter in the URL can be used.Ī list of daily weather variable aggregations which should be returned. A day must be specified as an ISO8601 date (e.g.Ī list of weather variables which should be returned. &elevation=nan is specified, downscaling will be disabled and the API uses the You can manually set the elevation to correctly match mountain peaks. Per default, a 90 meter digital elevation model is used. The elevation used for statistical downscaling. Geographical WGS84 coordinate of the location
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