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 Organization

NO 57
Acronym NIWA
Name National Institute of Water & Atmospheric Research Ltd.
Address 1 NIWA - Wellington
Address 2 Private Bag 14901, Kilbirnie, Wellington, 6241
Address 3 301 Evans Bay Parade, Hataitai, Wellington 6021
Country/Territory New Zealand
Website http://www.niwa.co.nz

 Contact(s)

Name Gordon Brailsford
Prefix
Email gordon.brailsford@niwa.co.nz
Organization No 57
Organization acronym NIWA
Organization name National Institute of Water & Atmospheric Research Ltd.
Organization country/territory New Zealand
Address 1
Address 2
Address 3
Country/territory New Zealand
Tel
Fax
Last updated date 2020-12-03


Name Sylvia Nichol
Prefix
Email sylvia.nichol@niwa.co.nz
Organization No 57
Organization acronym NIWA
Organization name National Institute of Water & Atmospheric Research Ltd.
Organization country/territory New Zealand
Address 1
Address 2
Address 3
Country/territory New Zealand
Tel
Fax
Last updated date 2020-12-03


 Background observation
 UTC+12:00
 permil
 1991-01-01 00:00:00 - 9999-12-31 23:59:59: VPDB
 1991-01-01 00:00:00 - 1995-12-31 23:59:59: Nuclide Analysis Associates 6-60 Mass Spectrometer(Mass spectrometry)
 1996-01-01 00:00:00 - 9999-12-31 23:59:59: Finnigan MAT 252(Mass spectrometry)
 event
 Two working reference gases with 13C/12C ratio close to -47 permille are calibrated annually vs CO2 evolved from NBS19.
Whole air samples are processed cryogenically and methane is oxidised quantitatively on platinised alumina at 750 degrees celcius. The resulting CO2 from the combustion is cryogenically distilled and transferred to a glass sample bottle.
Samples are then measured for 13C/12C ratio.
Working reference gas voltage is set to match sample voltage
3 sets of 10 determinations of sample vs reference
Idle time 15sec;
Integration 8 sec
 
 [Hourly]
 [Daily]
 [Monthly]
 
 Operational/Reporting
 
 Wind direction: 1
 Wind speed: 1
 Relative humidity: 0
 Precipitation amount: 0
 Air pressure: 0
 Air temperature: 0
 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.
 
1  Lowe at al., J. Geophys. Res., 96, 15455-15467, 1991.
2  Lowe at al., J. Geophys. Res., 99, 16913-16925, 1994.