|
| 
Lauder
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
6 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous |
| Sampling environment |
: |
670 m elevation
Local pollution
|
| 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 |
: |
UV Photometer
2003.01- :TEI 49-c |
| Description of instrument |
: |
TEI 49-c
1.0 ppb precision
+/- 1.% 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 TEI standard |
| Scale and calibration(treasability) |
: |
Calibration from NIST Traceable standart TEI instrument: Calibrated February 2012 |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
Instrument outputs in two files
1 hour records with instrument details
5 minute data averages
These files are processed to remove any data that has been marked as influenced by outside sources (ie. power outages, 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 |
: |
|
| Data remarks |
: |
|
| Other Information |
| Scientific aim |
: |
Measurement of background air quality over the eastern Pacific and detection of transpacific pollution.
NOx and VOC influences |
| Reference |
: |
http://www.esrl.noaa.gov/gmd/ozwv/surfoz/index.html |
|
| submitted by Earth System Research Laboratory, NOAA |
|
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