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Vindeln
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
3 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
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| Description for sampling analysis |
: |
Material of intake: Plastic
Intake height: 3.5 meter above ground
Tubing: about 6 m length with 1/4 inch diameter made by Teflon
Air is sampled 0.5 liter per minute
Data is sampled every second, and a 10 minute average is stored.
1991 January - 1996 April Dasibi 1008-AH/520
1996 April - 1999 October Monitor Labs ML8810/520
1999 October - 2000 Februari Monitor Labs ML9810/985
2000 Februari - 2007 Januari ML8810/520
2007 Januari - 2013 May ML 9810/992
2013 May - present TH49i/1313001 |
| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
UV Absorption |
| Description of instrument |
: |
TH49i : http://www.thermoscientific.com/en/product/model-49-i-i-i-ozone-analyzer.html
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| Calibration |
| Current scale employed in the measurement |
: |
National Standard instrument |
| Measurement calibration |
: |
Zero and five points span check (40, 80, 120, 160, 200 ppb) tree times per year (Jan, May, Sept) with a transfer standard Dasibi 1008PC. The transfer standard is calibrated against the reference standard UV Photometer SRP#11 (National Institute of Standards, USA) at the Air Pollution Laboratory, Institute of Applied Environmental Reasearch, Stockholm University, Sweden every year. |
| Scale and calibration(treasability) |
: |
National Standard instrument |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
Ozone measurements are daily checked by an operator. All irregular observations and information are recorded in a log book. Final data checking and validation is performed after each calibration. Hourly averages is calculated from 10 minute data.
Daily and Monthly averages are calculated only from validated hourly data |
| Processing for averaging |
: |
|
| Data flag |
: |
Flags from EEA Air Quality:
http://dd.eionet.europa.eu/vocabulary/aq/observationvalidity/
-1 Not valid
-99 Not valid due to station maintenance or calibration
1 Valid
2 Valid, but below detection limit measurement value given
3 Valid, but below detection limit and number replaced by 0.5*detection limit
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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 Swedish Environmental Research Institute |
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