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Schauinsland
-NO2-
| Observation |
| Category |
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Air sampling observation |
| Situation |
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ongoing |
| Time zone |
: |
Local time 1 |
| Sampling |
| Sampling height |
: |
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| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
continuously, one average value every 10 minutes |
| Sampling environment |
: |
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| Description for sampling analysis |
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Chemoluminescence with photolytic converter, height of the line is 12 meters above the ground and 9m over the top of the measurement station.
Chemoluminescence Analyzer combined with a blue Light photolytic Converter (DMT), to eliminate the cross sensitivities against Pan, HNO3 etc. |
| Instrument and Analysis |
| Measurement method |
: |
Chemiluminescence |
| Current status and history of instrument |
: |
Chemiluminescence |
| Description of instrument |
: |
Thermo Elektron
42 CTL, with photolytic converter 2003 11 - |
| Calibration |
| Current scale employed in the measurement |
: |
All data is based on UBA scale |
| Measurement calibration |
: |
Transfer standard calibration with certified tanks of NO in N2, two times per month, traceable to UBA regional standard. Zero/span check every day. Gas phase titration every week, to check the efficiency of the photolytic converter. Synthetic air for zero gas measurement. |
| Scale and calibration(treasability) |
: |
All data is based on UBA scale |
| Data Processing |
| Measurement unit |
: |
ug/m3-20C |
| Data processing |
: |
All values are quality controlled. |
| Processing for averaging |
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Processing for Hourly Data:
The data acquisition system provides one average value every ten minutes. 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 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.
Processing for Daily Data:
Take the arithmetic mean of selected half hourly data with the number of data more than 31.
Processing for Monthly Data:
Take the arithmetic mean of selected half hourly data with the number of data more than 960. |
| Data flag |
: |
Hourly
...- 2005: 1 = valid value, 6 = calibration, 9 = error code
2006 -...: 0 = valid value, 3 = invalid data, 6 = calibration |
| Data remarks |
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| Other Information |
| Scientific aim |
: |
To provide reliable data for research to reveal long term trends of air pollution, long distance transport and climate change in Central Europe. |
| Reference |
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"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
http://www.umweltbundesamt.de/luft/luftmessnetze/ubamessnetz.htm
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| submitted by Federal Environmental Agency Germany |
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