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2.3.1.Surface-land observations
This module displays all stations reported by the DWD GSN reporting. DWD provides a monthly monitoring statistics report, which includes information on the availability and completeness of the CLIMAT reports sent by all the surface land stations that are part of GSN. The availability results are obtained by checking the collected monthly CLIMAT messages against the list of stations affiliated to the GSN and registered in OSCAR/Surface. For a station to be classified as reporting it needs to have sent a CLIMAT message that includes information of at least one of the following variables: monthly mean temperature, monthly precipitation amount, mean daily maximum temperature and mean daily minimum. The completeness is obtained from the information - not mandatory though - provided on the number of days of the month missing for some observed variables. The variables included in GSN completeness monitoring are: daily mean surface pressure, daily mean air temperature, daily maximum air temperature, daily minimum air temperature, daily mean water vapour, total daily precipitation and total daily sunshine duration. Provision of the data report (monthly), typically happens on the 22nd of the following month.
2.3.2.Upper-air land observationsÂ
This module displays all stations reported by the DWD GUAN reporting. DWD is providing the monthly statistics reports for both availability and quality monitoring categories. The availability results for the GCOS upper-air stations are based on DWD data assimilation system, whereas the quality results provided by DWD are based on the O-B departures from ECMWF data assimilation system. The availability reports contain information on all GCOS upper-air stations regarding the number of radiosonde soundings that reach the 30hPa level in the reported month. The quality reports contain the root mean square of O-B departures calculated for the sounding profiles of the following observed quantities: upper-air temperature, upper-air humidity and upper-air wind. Provision of these data reports (monthly), typically happens 2 days after the end of the month. It is worth noting that contrary to the NWP monitoring, the monitoring of the GUAN stations only covers the radiosonde observations provided in the new Binary Universal Form for Representation of meteorological data (BUFR) reports.