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When does the information inserted in OSCAR/Surface (e.g., a new station.) show in the WIGOS Data Quality Monitoring System webtool?
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The monitoring report files provided by the NWP Centres include information either on surface pressure or on geopotential height depending on each of the reported observation was used in their data assimilation systems. In mountain areas, the stations report the geopotential height of a standard pressure level instead of mean sea level pressure, and some Centres (e.g. ECMWF and JMA) are able to assimilate these observations and provide O-B departure values.
What does “reporting” in the availability performance of the GCOS surface network (GSN) mean?
A GSN station is classified as “reporting” (green) if has 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.
What is the difference between brown (“not provided”) and red (“0”) station dots in the completeness performance maps of the GCOS surface network (GSN) ?
The completeness performance provides information of the number of days which were used to calculate the monthly average for each variable provided in the CLIMAT report. However, the groups in section1 of CLIMAT that provide this information are not mandatory. Therefore, the system distinguishes the stations that did not send any information regarding the number of days missing for data (section1, groups 8 and 9) during the selected month (brown dot) from the stations that reported not having included the observation at all (red dot) within the selected month.
Why does the search for a specific ID not work sometimes?
The feature to search a station by its name and WIGOS ID is available on all WDQMS web tool maps. The search is based on the information displayed on the map, therefore if the station is not expected to report according to OSCAR/Surface schedule and did not report during the selected period (e.g. 6-hour) the dot is not on the map and the result of the search is null.
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A Download feature is available in WDQMS web tool, allowing the user to download a CSV (Comma-Separated Values) file with a summary of the content displayed on the map. The Download feature is accessed in the WDQMS web tool maps through the “Download data” link in the bottom right-end corner underneath the map. All files contain the list of stations and the respective NWP monitoring statistics corresponding to the selection (i.e., data type, monitoring category, date, time interval, observed variable and NWP Centre).
When is the GSN monthly monitoring information available on WDQMS?
The GSN is based on the routine monitoring of CLIMAT reports done by DWD and JMA in their capacities as GSN monitoring centres. The system collects a file provided monthly by DWD with information on availability and completeness of CLIMAT data for all the GSN stations recorded in OSCAR/Surface. The data report is normally made available (monthly) on the 22nd of the following month.
On the GBON upper-air module legend, what does "complete soundings" mean?
A radiosonde (sounding) is deemed complete if it measures air temperature and horizontal wind up and above 100hPa and air humidity up to 100hPa. In the GBON upper-air module only complete soundings will be used to determine the station data availability. As a result, a radiosonde delivered by a station with measurements only up to 100hPa will not be included in the station's data availability statistics.