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 Organization

NO 71
Acronym UBAG
Name German Environment Agency
Address 1 Umweltbundesamt (Federal Environment Agency) FG II4.5, Air Monitoring Network, Paul-Ehrlich-Str. 29, 63225 Langen
Address 2 Umweltbundesamt, WörlitzerPlatz 1, 06844 Dessau-Roßlau
Address 3
Country/Territory Germany
Website https://www.umweltbundesamt.de/gaw

 Contact(s)

Name Frank Meinhardt
Prefix
Email frank.meinhardt@uba.de
Organization No 71
Organization acronym UBAG
Organization name German Environment Agency
Organization country/territory Germany
Address 1 Umweltbundesam Messstation Schauinsland
Address 2 Schauinslandweg 2
Address 3 79254 Oberried-Hofsgrund
Country/territory Germany
Tel +497602910010
Fax
Last updated date 2020-07-16


 Background observation
 UTC+01:00
 ppb
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: WMO N2O X2006A
 1995-12-31 00:00:00 - 2015-12-31 23:59:59: Hewlett Packard Modified HP 6890 GC 020394(Gas chromatography (ECD))
 2016-01-01 00:00:00 - 9999-12-31 23:59:59: LosGatosResearch QCL N2O/CO 3EP(off-axis integrated cavity output spectroscopy (OA-ICOS))
 9999-12-31 00:00:00 - 2005-09-30 23:59:59: 6 (m)
 2005-10-01 00:00:00 - 9999-12-31 23:59:59: 12 (m)
 5 minutes
 All data are based on WMO mole fraction scale. (NOAA/CMDL)
Calibration of the GC Data N2O
Calibration gas: N2O in natural air.
GCalibrations are carried out every 15 minutes using working standard tanks,
which have been calibrated by the use of a group of 6 NOAA station standards. The NOAA station standards envelope the actual atmospheric concentrations of N2O.
On calibration, the non linear response of the used ECD is taken into account.

Calibration of the LGR Data N2O and CO:
Calibration gas: N2O and CO in natural air. The calibration of the data is carried out every 8 hours using a short term standard tank, and a target tank every 48 hours. Every 3 month a linearity test is carried out by 5 labratory standards from NOAA/CMDL Carbon Group.
Current Scale: WMO mole fraction scale
 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 Excel File, where an Macro correct the Nonlinearity of the ECD detector. The GC data from 2001 to 2015 have been reevaluatecd in the frame of the INGOS project.

Processing of Data from QCL (Los Gatos, N2O, CO) from 01.01.2016.
The data acquisition system provides 1-minute averages of the raw data.
The rawdata are further processed by an R program written by the University of Heidelberg with the calibration results of the working standards and target measurements to half hourly values. The program also show the standard deviation of the working standard and target measurements, and show the differences of the data set to the GC measurements.

 [Hourly] The data acquisition system provides two ambient air values, and one calibration value every 15 minutes. Invalid data caused by local impact, malfunction or other effects are detected by comparison and correlation with other trace substances and meteorological data and also 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 with more than 2/3 of all data. For reporting to WDCGG hourly mean values are calculated from these half hourly data.
 [Daily] Take the arithmetic mean of selected half hourly data with the number of data more than 31.
 [Monthly] Take the arithmetic mean of selected half hourly data with the number of data more than 960.
 Flags put on hourly data are as follows.
...- 2005: 1 = valid value, 6 = calibration, 9 = error code
2006 -...: 0 = valid value, 3 = invalid data, 6 = calibration
 Operational/Reporting
 GC equipped with a packed column and a electron capture detector (EDC).
Modified GC system with ChemStation Software for quasi-continuously, automatically application.
 Wind direction: 1
 Wind speed: 1
 Relative humidity: 1
 Precipitation amount: 0
 Air pressure: 1
 Air temperature: 1
 Dew point temperature: 0
 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.
 The height of the meteorological sensors has changed in 2006 from 10m above station level (1205m) to 35m above station level. This is visible in the increase of the windspeed data.
No DOI available

 Related information

Format Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF
Relation List (Is Part Of) All N2O data contributed to WDCGG by GAW stations and mobiles by 2021-08-24
All N2O data contributed to WDCGG by GAW stations and mobiles by 2020-09-28
All N2O data contributed to WDCGG by GAW stations and mobiles by 2019-09-19
All N2O data contributed to WDCGG by GAW stations and mobiles by 2018-10-23
Geolocation Point
Latitude (north: +; south: -) 47.9000015259
Longitude (east: +; west: -) 7.9166665077

 Reference(s)

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  http://www.umweltbundesamt.de/luft/luftmessnetze/ubamessnetz.htm