|
| 
Ragged Point
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
15 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
Predominant airflow from off the ocean with the sampling tower located on a high bluff. There are no nearby sources of ozone precursor emissions. |
| Description for sampling analysis |
: |
teflon inlet line with PTFE filter membrane
1-3 lpm sample flow |
| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
1989.01-1995.12 : DASIBI (UV- Photometer)
2006.07- : TEI 49C (UV- Photometer) |
| Description of instrument |
: |
Dasibi - Resolution - 1 ppb for individual 25 sec measurement.
Range - Threshold 1-2 ppb, Maximum 1000 ppb
Accuracy - 3% based on intercomparison with NIST and Network
Standard
TEI 49C - Resolution - 0.1 ppb for 10 sec measurement
Range - Threshold <1 ppb, Maximum 1000 ppb
Accuracy - 2% based on intercomparison with NIST and Network
Standard |
| Calibration |
| Current scale employed in the measurement |
: |
the NIST standard |
| Measurement calibration |
: |
Intercomparsion with Network Standard that is intercompared with the NIST Standard Reference Photometer
February 2012 |
| Scale and calibration(treasability) |
: |
calibration with NIST standard
|
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
All data included for properly operating instrument. |
| 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 |
: |
|
| Data remarks |
: |
|
| Other Information |
| Scientific aim |
: |
Measurement of background surface ozone.
Tropical air monitoring |
| 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 |
|
|
