The availability performance of the GCOS Surface Network (GSN) is obtained by selecting the following options in the WDQMS web tool: “surface” and “availability” in GCOS monitoring module and Monitoring category, respectively. The maps display the monthly availability performance for each GSN station highlighting the stations that are reporting (green), not reporting during the period (black), reporting but not registered in OSCAR/Surface (yellow) and not reporting and not registered in OSCAR/Surface (grey). The latter two categories pertain to metadata issues as the station Id is included in the monitoring report provided by DWD, but it can not be matched to a station in the GSN station baseline used in WDQMS web tool, which is retrieved from OSCAR/Surface and updated monthly. Clicking on a dot on the map shows a pop-up window with information about the station data availability for the selected month and a link to the station metadata in OSCAR/Surface. Moreover, clicking on “Time series” on the pop-up will display one year of the station monthly availability performance results.
The completeness performance of the GCOS surface land component is available on WDQMS web tool when “completeness” (as Monitoring category) of “surface” in the “GCOS” monitoring module is selected. By selecting the month and variable, a map will show the number of daily averaged data for the selected variable. The generated map is calculated from the monthly reported number of days missing for data of the variable of interest. It shows the stations whose CLIMAT reports for the selected variable contained average based on the full month of data (green dots), and highlights the stations with monthly average based on incomplete dataset (yellow, orange and red dots). Worth noting that the system allows to distinguish the stations that did not send any information regarding the number of days missing for data - this information is not mandatory in the CLIMAT reports - during the selected month (brown) from the stations that reported not having included the observation at all (red) within the selected month. Clicking on a dot on the map opens a screen with detailed information about the station data completeness for the selected month, i.e., the number of days for the selected variable. Clicking on “Time series” opens a screen with a chart containing the completeness information over time (1 year), namely the time series with the monthly values of the number of daily averaged data for all the variables available (i.e., 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).