|Name||German Environment Agency|
|Address 1||Umweltbundesamt, Wörlitzer Platz 1, 06844 Dessau-Roßlau|
|Address 2||Umweltbundesamt (Federal Environment Agency) FG II4.5, Air Monitoring Network, Paul-Ehrlich-Str. 29, 63225 Langen|
|Organization name||German Environment Agency|
|Address 1||Umweltbundesamt, Umweltforschungsstation Schneefernerhaus, Zugspitze 5, 82475 Zugspitze|
|Last updated date||2022-05-12|
2002-01-01 00:00:00 - 9999-12-31 23:59:59: WMO SF6 X2014
2002-01-01 00:00:00 - 9999-12-31 23:59:59: Hewlett Packard Modified HP 6890 Chem. station, # US00030144(Gas chromatography (ECD))
2001-01-01 00:00:00 - 9999-12-31 23:59:59: 3.00 (m)
All data are based on NOAA/CMDL scale. Calibration gas: SF6 in natural air. Calibrations are carried out every 15 minutes using working standard tanks, which have been calibrated to a group of 6 NOAA station standards which envelope the atmospheric concentrations of SF6
Processing of GC Data
With a software, called GC-Organizer, written by the team of I.Levin at University of Heidelberg the measured 5 min raw data are visually controlled in respect to outliers and the standard deviation during measurement of the standards. Outliers are removed with this graphical tool. After this pre-check 30 min atmospheric concentrations and standard deviation of CO2, CH4, SF6 and N2O are calculated with the same software program.
Afterwards these 30 min data are imported with a self written software program, called Dafit (Description see: www.gawstat.de).
The 30 min data are screened graphically. For a second validation, episodes of local pollution, also power failures, Instrument repairs etc. can be flagged. The digital log-book and if required, trajectories and co correlation with simultaneously measured data are used in to verify the CO2, CH4, N2O and SF6 data.
Then from the flagged data for scientific purpose and export aggregation to 60min, 1day, 1month and 1year data is calculated in a standardized way for each, simultaneously also files with the WDCGG export format are produced in a standardized way to automate the workflow.
[Hourly] Mean Processing for the GC-data CO2, CH4, N2O and SF6
The data acquisition system provides one value every five minutes raw data. Zero/calibration factors and data protocols are used to convert raw data into calibrated data. Invalid data caused by local impact, malfunction or other effects are detected by comparison/ correlation with other trace substances and meteorological data and with information from the station logbook and then are rejected. 30 min mean values are generated by calculating the arithmetic mean of the remaining data.
For reporting to WDCGG hourly mean values are calculated from these half hourly data.
[Daily] Mean Processing for the GC-data CO2, CH4, N2O and SF6
Daily mean values are generated by calculating the arithmetic mean of the available hourly data within the respective day.
nvalue refers to the number of available hourly averages within the respective day.
[Monthly] Mean Processing for the GC-data CO2, CH4, N2O and SF6
Monthly mean values are generated by calculating the arithmetic mean of the available daily data within the respective month.
nvalue refers to the number of available daily averages within the respective month.
3: Not Valid
Valid (background): 1
Gas chromatography followed by electron capture detection
Especially designed GC unit, project of university Heidelberg for Umweltbundesamt
Wind direction: 1
Wind speed: 1
Relative humidity: 1
Precipitation amount: 0
Air pressure: 1
Air temperature: 1
Dew point temperature: 1
Sea water temperature: 0
Sea surface water temperature: 0
Sea water salinity: 0
Sea surface water salinity: 0
Meteorological data may remain as first provided, even when greenhouse gas data are updated.
|Format||Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF|
|Relation List (Is Part Of)||
All SF6 data contributed to WDCGG by GAW stations and mobiles by 2022-09-05
All SF6 data contributed to WDCGG by GAW stations and mobiles by 2021-08-16
All SF6 data contributed to WDCGG by GAW stations and mobiles by 2020-09-28
All SF6 data contributed to WDCGG by GAW stations and mobiles by 2019-09-19
All SF6 data contributed to WDCGG by GAW stations and mobiles by 2018-10-23
|1||+ an own SOP for measurements of greenhouse gases with gas chromatography|
1) "Qualitatssicherungs-Handbuch des UBA-Messnetzes", UBA Texte 28/04, (Handbook for quality assurance for the measurement network for the Federal Environmental Agency, Germany), Dr.Klaus Nienerowski, Umweltbundesamt, Berlin, Juni 2004,
2) Handbook for the data processing software called Dafit can be downloaded from www.gawstat.de