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 Organization

NO 23
Acronym Empa
Name Swiss Federal Laboratories for Materials Science and Technology
Address 1 Ueberlandstrasse 129
Address 2 8600 Duebendorf
Address 3 Switzerland
Country/Territory Switzerland
Website http://www.empa.ch/gaw

 Contact(s)

Name Thomas Seitz
Prefix Dr.
Email thomas.seitz@empa.ch
Organization No 23
Organization acronym Empa
Organization name Swiss Federal Laboratories for Materials Science and Technology
Organization country/territory Switzerland
Address 1
Address 2
Address 3 Überlandstrasse 129 CH-8600 Dübendorf Switzerland
Country/territory Switzerland
Tel +41 58 765 4655
Fax
Last updated date 2020-07-09


 Background observation
 UTC+01:00
 ppb
 9999-12-31 00:00:00 - 2000-12-31 23:59:59: NMI PRM AC11
 2001-01-01 00:00:00 - 2006-04-30 23:59:59: NIST SRM 1677c
 2006-05-01 00:00:00 - 2011-11-30 23:59:59: NIST SRM 2612a
 2011-12-01 00:00:00 - 2016-12-31 23:59:59: NPL PRGM in synth. Air
 2017-01-01 00:00:00 - 9999-12-31 23:59:59: NPL PRGM NG677 in synth. Air
 9999-12-31 00:00:00 - 2007-07-31 11:59:59: APMA 360 (HORIBA Ltd.)(NDIR)
 2007-07-31 12:00:00 - 2012-09-05 11:59:59: APMA 370 (HORIBA Ltd.)(NDIR)
 2012-09-05 12:00:00 - 2017-11-29 12:41:59: Picarro G2302(CRDS)
 2017-11-29 12:42:00 - 2017-12-05 12:11:09: Picarro CO/CO2/CH4/H2O G2401(CRDS)
 2017-12-05 12:11:10 - 9999-12-31 23:59:59: Picarro G2302(CRDS)
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: 5.0 (m)
 5 seconds
 manual zero and span calibration every 2 weeks
Scale and Calibration (traceability) : 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;
from 12/2011 to 12/2016: NPL PRGM 221708SG in synth. air (10ppm ± 0.04ppm); NPL is traceable to NIST (refer to the NPL homepage)
Since 01/2017: NPL PRGM NG677 in synth. Air
 Quality assurance procedures involve time series plots, consistency checks. All aggregate calculations based on 10-minute aggregates with greater than 75% availability
 [Hourly]
 [Daily] 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;
[2010-01-01 thru 2016-01-01] uncertainty = [(0.0208ppm)^2+(0.0069*c)^2]^0.5
Since 2016-01-01 uncertainty = [(0.021 ppm)^2+(0.0028*c)^2]^0.5
 [Monthly]
 
 Operational/Reporting
 Air intake: open-face, ambient
Measurement Methods:
Horiba instruments: non-dispersive infrared detection (NDIR);
Picarro instruments: Cavity Ring Down Spectroscopy CRDS
 Wind direction: 1
 Wind speed: 1
 Relative humidity: 1
 Precipitation amount: 1
 Air pressure: 1
 Air temperature: 1
 Dew point temperature: 0
 Sea water temperature: 0
 Sea surface water temperature: 0
 Sea water salinity: 0
 Sea surface water salinity: 0
Meteorological data may remain as first provded, even when greenhouse gas data are updated.
 
No data available