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| 
Rigi
-CO-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
Local time +1 |
| Sampling |
| Sampling height |
: |
|
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
1 minute |
| Sampling environment |
: |
|
| Description for sampling analysis |
: |
Air intake:open-face, ambient
|
| Instrument and Analysis |
| Measurement method |
: |
Horiba instruments: non-dispersive infrared detection (NDIR);
Picarro instruments: Cavity Ring Down Spectroscopy CRDS |
| Current status and history of instrument |
: |
Cavity Ring Down Spectroscopy CRDS |
| Description of instrument |
: |
[1999-12-08 thru 2007-07-31] APMA 360 (HORIBA Ltd.);
[2007-07-31 thru 2012-09-05] APMA 370 (HORIBA Ltd.);
Since 2012-09-05 Picarro G2302 |
| Calibration |
| Current scale employed in the measurement |
: |
NPL PRGM in synth. air (10ppm ± 0.04ppm)
|
| Measurement calibration |
: |
manual zero and span calibration every 2 weeks |
| Scale and calibration(treasability) |
: |
From 12/1999 until 01/2001: NMI PRM AC11 (10ppm ± 0.08ppm);
from 01/2001 until 05/2006: NIST SRM 1677c(10ppm ± 0.05ppm);
from 05/2006 to 12/2011: NIST SRM 2612a (10ppm ± 0.12ppm); consistent with WMO-2000;
since 12/2011: NPL PRGM in synth. air (10ppm ± 0.04ppm); NPL is traceable to NIST (refer to the NPL homepage)
|
| Data Processing |
| Measurement unit |
: |
ppbv |
| Data processing |
: |
Quality assurance procedures involve time series plots, consistency checks. All aggregate calculations based on 10-minute aggregates with greater than 75% availability |
| Processing for averaging |
: |
Processing for Daily Data:
Estimated standard uncertainty for daily aggregates:
[1999-12-08 thru 2008-01-01] 2.4 ppbv below 120 ppbv, 2 % otherwise;
[2008-01-01 thru 2009-01-01] uncertainty = [(0.0141ppm)^2+(0.0125*c)^2]^0.5;
[2009-01-01 thru 2010-01-01] uncertainty = [(0.0191ppm)^2+(0.0070*c)^2]^0.5;
[since 2010-01-01] uncertainty = [(0.0208ppm)^2+(0.0069*c)^2]^0.5
|
| Data flag |
: |
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| Data remarks |
: |
SD: If the SD is listed: Instead of the SD (standard deviation), the standard uncertainty is given.
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| Other Information |
| Scientific aim |
: |
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| Reference |
: |
|
|
| submitted by Swiss Federal Laboratories for Materials Testing and Research |
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