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Puy de Dome
-CO-
| Observation |
| Category |
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Air sampling observation |
| Situation |
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ongoing |
| Time zone |
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UTC |
| Sampling |
| Sampling height |
: |
2 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
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10 seconds sampling average on 5 minutes |
| 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 |
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Light absorption analysis (IR, except NDIR) |
| Current status and history of instrument |
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| Description of instrument |
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Range: 0 - 5000 ppm
Average Time 10 - 300s
Zero/span check level Zero drift: 20ppb Span drift 10%
Pecision 95% CI < 10%
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| Calibration |
| Current scale employed in the measurement |
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Traceable to national standard scale ( EMD : Ecole des Mines de Douai - France ) |
| Measurement calibration |
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| Scale and calibration(treasability) |
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| Data Processing |
| Measurement unit |
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ppb |
| Data processing |
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The raw data from the instrument is collected by the data acquisition system and sended to database computer in five minutes average raw data |
| Processing for averaging |
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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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