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| 
Gosan
-CO2-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
Local time 09 |
| Sampling |
| Sampling height |
: |
72 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
30 s |
| Sampling environment |
: |
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| Description for sampling analysis |
: |
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| Instrument and Analysis |
| Measurement method |
: |
NDIR |
| Current status and history of instrument |
: |
Ultramat 6, Siemens |
| Description of instrument |
: |
Range : 0- 500 ppmv
Chopper frequency : 13.098 Hz
Chopper Temperature : 164.8 Celsius
Detecter Temperature : 43.7 Celsius
Pressure range : 10 hpa
Barometric pressure : 1005 hpa
Analog output : 4~20 mA
Zero drift : < ±1% of measuring span per week
Sample point drift : < ±1% of the point per week
Sample gas flow : 1 L/min |
| Calibration |
| Current scale employed in the measurement |
: |
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| Measurement calibration |
: |
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| Scale and calibration(treasability) |
: |
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| Data Processing |
| Measurement unit |
: |
ppm |
| Data processing |
: |
All data with obvious sampling or instrument operation problems are rejected.
Remaining data are then selected for background with the aid of a statistical filter. The hourly data with the number of data less than 60 are rejected. The data with hourly standard deviation greather than 0.6 ppm are rejected. The hourly data with large discrepancy with an adjacent measure exceeding 0.6 ppm are rejected. |
| Processing for averaging |
: |
Processing for Hourly Data:
All data with obvious sampling or instrument operation problems are rejected.
Remaining data are then selected for background with the aid of a statistical filter. The hourly data with the number of data less than 60 are rejected. The data with hourly standard deviation greather than 0.6 ppm are rejected. The hourly data with large discrepancy with an adjacent measure exceeding 0.6 ppm are rejected.
Processing for Daily Data:
After the processing on hourly data, the daily data with the number of hourly data less than 7 are rejected.
Processing for Monthly Data:
After the processing on daily data, the monthly data with the number of daily data less than 7 are rejected. |
| Data flag |
: |
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| Data remarks |
: |
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| Other Information |
| Scientific aim |
: |
To track the progress of 'Global Greenhouse Effect' on the Korean peninsula with investigating the concentration of greenhouse gases and their variations. |
| Reference |
: |
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| submitted by Global Environment Research Center of NIER (National Institute of Environmental Research |
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