In line with the GAW Data Policy, users should contact the contributors of all data of interest and propose co-authorship or acknowledgement.
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 | |
| 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 | 2023-10-02 |
| Name | Sylvia Nichol |
|---|---|
| Prefix | |
| 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 | 2023-06-26 |
| Background observation | |
| UTC+12:00 | |
| ppb | |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: WMO CH4 X2004A |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: University of Wollongong (Australia) in-situ mid-infrared Fourier transform spectrometer(Mid-FTIR) |
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2007-01-05 15:00:00 - 9999-12-31 23:59:59: 10 (m) |
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| event | |
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The IFTS data is calibrated to the NOAA/WMO scale via daily measurements of one working standard. The working tank is baseline air sampled from the Baring Head station (Wellington, New Zealand) in clean conditions. The working tank is filled to 2000PSI. The New Zealand regional scale transfer reference (NZRSTF) gas suite is located at NIWA GASLAB (Greta point, Wellington) which are calibrated on the NOAA/WMO scale. The Methane in the working tank is measured with a Gas chromatograph (GC) and calibrated against the NZRSTF suite. Once the working tank pressure drops to 500psi the tank is sent back to NIWA GASLAB for re-measurement to ascertain drift. A new working tank is required every 1.5 years. |
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Both sample and working tank gas measurements are first converted to dry mole fractions (Hammer ,2013). An empirically derived Residual pressure sensitivity (RPS) term (Hammer,2013) is then applied to the sample data. The magnitude of which is proportional to the pressure difference between the sample and average calibration pressure. The Lauder CH4 IFTS RPS coefficient was measured to be 0.034, comparable to that of 0.031 as measured in Hammer (2013). The ASF is then applied to the RPS corrected samples. The corrected and calibrated samples and working tank calibrations are then passed through a quality control and quality assurance process. Instrument and retrieval diagnostics are used to screen the data. Data taken during erroneous instrument operation are discounted. |
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[Hourly] The data submitted are hourly averages comprising of 10minute measurements made within the hour. A minimum of three 10 minute measurements are required to construct a valid hourly value. [Daily] [Monthly] |
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| Temporarily suspended | |
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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 |
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Meteorological data may remain as first provided, even when greenhouse gas data are updated. |
No DOI available
Related information
| Format | Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF | ||||
|---|---|---|---|---|---|
| Relation List (Is Part Of) |
All CH4 data contributed to WDCGG by GAW stations and mobiles by 2023-09-13 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2022-09-07 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2021-08-27 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2020-09-28 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2019-09-19 All CH4 data contributed to WDCGG by GAW stations and mobiles by 2018-10-25 |
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| Geolocation Point |
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GAW Data Policy
"For Scientific purposes, access to these data is unlimited and provided without charge.
By their use you accept that an offer of co-authorship will be made through personal contact with the data providers
or owners whenever substantial use is made of their data.
In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."
Citation format
This format is an example of the WDCGG standard citation.
Please follow the citation format which the data providers or owners indicate.
Please follow the citation format which the data providers or owners indicate.
Gordon Brailsford (NIWA),
Sylvia Nichol (NIWA),
Atmospheric CH4
at Lauder by National Institute of Water & Atmospheric Research Ltd.
,
dataset published as CH4_LAU_
surface-insitu_NIWA_data1 at WDCGG,
ver. 2023-12-04-1359 (Reference date*: YYYY/MM/DD)
* As the reference date, please indicate the date you downloaded the files.
* As the reference date, please indicate the date you downloaded the files.
Reference(s)
| 1 |
Sepulveda et al., Tropospheric CH4 signals as observed by NDACC FTIR at globally distributed sites and comparison to GAW surface in-situ measurements, Atmos. Meas. Tech. Discuss., 7, 633-701, doi:10.5194/amtd-7-633-2014, 2014. |
|---|---|
| 2 |
Griffith, D. W. T., Deutscher, N. M., Caldow, C., Kettlewell, G., Riggenbach, M., and Hammer, S.: A Fourier transform infrared trace gas and isotope analyser for atmospheric applications, Atmos. Meas. Tech., 5, 2481-2498, doi:10.5194/amt-5-2481-2012, 2012. |
| 3 | Hammer, S.,D. W. T. Griffith, G. Konrad, S. Vardag, C. Caldow, I. Levin, Assessment of a multi-species in-situ FTIR for precise atmospheric greenhouse gas observations, Atmos. Meas. Tech. , 6, 1153-1170, 2013 |
