|
| 
Tutuila (Cape Matatula)
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
6 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
Marine/coastal sampling environment |
| Description for sampling analysis |
: |
Teflon inlet and inlet line with PTFE filter membrane
1-3 lpm sample volume |
| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
1975.12-1980.12 : ECC ( Electrochemical concentration cell ozone meter )
1981.01-1999.04 : DASIBI (UV- Photometer)
1999.05- : TEI 49C (UV- Photometer) |
| Description of instrument |
: |
1.0 ppb precision
+/- 1.0% full scale linearity |
| Calibration |
| Current scale employed in the measurement |
: |
the NIST standard |
| Measurement calibration |
: |
0-200 ppb calibration scale
NIST standard |
| Scale and calibration(treasability) |
: |
NIST standard from February 2012 |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
All data is scrutinized to only remove the data that has been impacted by an external influence.
All other data is used for the most complete data set |
| Processing for averaging |
: |
Processing for Hourly Data:
all data averaged
Processing for Daily Data:
all data averaged
Processing for Monthly Data:
all data averaged |
| Data flag |
: |
|
| Data remarks |
: |
|
| Other Information |
| Scientific aim |
: |
Measurement of background surface ozone. |
| 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 |
|
|
