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Puy de Dome
-O3-
| Observation |
| Category |
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Air sampling observation |
| Situation |
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ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
2 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
O3 is sampled every 10 seconds. Data are averaged every five minutes, and stored in database. |
| Sampling environment |
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Puy de Dome station is a non urban site is far from pollution sources and is situated the most of time in the free troposphere. |
| Description for sampling analysis |
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| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
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| Description of instrument |
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Ranges: 0-0.005 to 200ppm
0-0.1 to 400 mg/m3
Zero noise: 0.5 ppb RMS
Zero drift: <1ppb/24 hour
<2ppb/7 day
Span drift: <1% per month
Precision: 1 ppb |
| Calibration |
| Current scale employed in the measurement |
: |
Traceable to national standard scale ( EMD : Ecole des Mines de Douai - France ) |
| Measurement calibration |
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| Scale and calibration(treasability) |
: |
The raw data from the instrument is collected by the data acquisition system and sended to database computer in five minutes average raw data |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
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| Processing for averaging |
: |
Processing for Hourly Data:
Hourly data are generated by arithmetic means of the previous hour data
Invalid data are not included. An hour interval with less than 75% avalabl values is forced with a "-999" mean
Processing for Daily Data:
Daily data are generated by arithmetic means of the previous day data
Invalid data are not included. An daily interval with less than 75% avalable values is forced with a "-999" mean
Processing for Monthly Data:
Monthly data are generated by arithmetic means of the previous month data
Invalid data are not included. An monthly interval with less than 75% avalable values is forced with a "-999" mean |
| Data flag |
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| Data remarks |
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| Other Information |
| Scientific aim |
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| Reference |
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| submitted by Laboratoire de Météorologie Physique |
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