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| 
Barrow
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
10 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
Predominant airflow is from the Arctic Ocean with no nearby anthropogenic sources or sinks. Occasional (< 5% of the time)contamination from the town of Barrow. |
| Description for sampling analysis |
: |
Continuous sampling through 10m inlet and teflon inlet line with PTFE filter membrane
1-3 lpm sample flow rate |
| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
1973.03-1975.12 : ECC ( Electrochemical concentration cell ozone meter )
1976.01-2003.12 : DASIBI (UV- Photometer)
2004.01-: TEI 49C (UV- Photometer)
2007.01-: TEI 49i (UV- Photometer) |
| Description of instrument |
: |
TEI 49-c
1.0 ppb precision
+/- 1.0% full scale linearity |
| Calibration |
| Current scale employed in the measurement |
: |
the NIST standard |
| Measurement calibration |
: |
Intercomparison with NOAA/ESRL maintained network standard traced to the U.S. NIST Standard Reference Photometer
0-200 ppb calibration scale
sample gas produced from NIST-calibrated standard TEI instrument |
| Scale and calibration(treasability) |
: |
U.S. NIST Standard Reference Photometer
calibration February 2012 |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
Instrument outputs two raw data files:
1 hour records with instrument details
5 minute data
These files are processed to remove any data that has been affected by outside influences (ie. power outage, zero span checks, etc.)
data is collected and processed weekly |
| Processing for averaging |
: |
Processing for Hourly Data:
average all data
Processing for Daily Data:
average all data
Processing for Monthly Data:
average all data |
| Data flag |
: |
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| Data remarks |
: |
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| Other Information |
| Scientific aim |
: |
Measurement of background surface ozone.
Surface ozone depletion events in the arctic
Long range transport mechanism |
| Reference |
: |
Oltmans, SJ and Levy II, H, Surface ozone measurements from a global network,
Atmos. Environ., 28, 9-24, 1994.
http://www.esrl.noaa.gov/gmd/ozwv/surfoz/index.html |
|
| submitted by Earth System Research Laboratory, NOAA |
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