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Niwot Ridge (Saddle)
-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 altitude (3523m), above tree line |
| Description for sampling analysis |
: |
continuous sampling through 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 |
: |
Thermo scientific TEI49c: 2003-current |
| 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 from NIST calibrated standard TEI instrument |
| Scale and calibration(treasability) |
: |
Calibration standard from February 2012 |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
1 hour average with instrument details
5 minute data averages
these files are then scrutinized to remove any data that has been directly affected by outside influences |
| Processing for averaging |
: |
Processing for Hourly Data:
average all good data
Processing for Daily Data:
average all good data
Processing for Monthly Data:
average all good data |
| Data flag |
: |
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| Data remarks |
: |
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| Other Information |
| Scientific aim |
: |
Background ozone measurements
Influence of fire on surface ozone levels
NOx and VOC studies with regard to surface ozone levels
stratospheric intrusion and boundary layer research |
| Reference |
: |
http://www.esrl.noaa.gov/gmd/ozwv/surfoz/index.html |
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| submitted by Earth System Research Laboratory, NOAA |
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