| ![](../../../figure/gaw_stations.gif)
Ähtäri
-SO2-
Observation |
Category |
: |
Air sampling observation |
Situation |
: |
ongoing |
Time zone |
: |
UTC |
Sampling |
Sampling height |
: |
|
Description |
: |
continuous |
Sampling and analysis frequency |
: |
Daily up to 28th December 2003. Weekly from 29th December 2003. |
Sampling environment |
: |
|
Description for sampling analysis |
: |
Filter Whatman 40, diameter 47 mm; NaoH impregnation. Filter sampling. Whaman4D filter, Ø47mm, impregnated with NaOH, flow rate 1 m3 / hour. |
Instrument and Analysis |
Measurement method |
: |
|
Current status and history of instrument |
: |
Ion Chromatograph; H20 extraction |
Description of instrument |
: |
IC:Waters |
Calibration |
Current scale employed in the measurement |
: |
|
Measurement calibration |
: |
Sampling equipment calibration four times a year. |
Scale and calibration(treasability) |
: |
|
Data Processing |
Measurement unit |
: |
ugS/m3-20C |
Data processing |
: |
Daily and monthly averages represents period which begins at 06:00 UTC. |
Processing for averaging |
: |
Processing for Daily Data: Daily averages are calculated from accepted hourly averages. If there are under 18 hourly values for a daily average, the daily average is missing. Processing for Monthly Data: Monthly averages are calculated from accepted daily averages. If the coverage of accepted daily averages is under 50 % in a month, the monthly average is missing. |
Data flag |
: |
EMEP flags are used (http://www.nilu.no/projects/ccc/submission.html) |
Data remarks |
: |
|
Other Information |
Scientific aim |
: |
|
Reference |
: |
|
|
submitted by Finnish Meteorological Institute |
|
|