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| 
Mauna Loa
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
6 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
High elevation station
influenced by local pollution and diurnal cycle |
| Description for sampling analysis |
: |
Continuous measurements through 6m 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 |
: |
1973.09-1975.12 : ECC ( Electrochemical concentration cell ozone meter )
1976.01-2003.07 : DASIBI (UV- Photometer)
2003.08- : TEI 49C (UV- Photometer) |
| Description of instrument |
: |
1.0 ppb precision
+/- 1.0% of full scale linearity |
| Calibration |
| Current scale employed in the measurement |
: |
the NIST standard |
| Measurement calibration |
: |
0-200 ppb calibration scale
sample gas produced through NIST calibrated standard instrument |
| Scale and calibration(treasability) |
: |
Calibration direct from NIST traceable standard TEI instrument
Calibration standard from February 2012
|
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
1 hour records with instrument details
5 minute data averages
these files are analyzed to remove any data that has been affected by outside influences (ie. power outage, zero span check, 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.
High elevation station
long range transport
VOC and NOx influence on surface ozone chemistry
|
| 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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