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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/amt-2020-367
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2020-367
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  14 Oct 2020

14 Oct 2020

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This preprint is currently under review for the journal AMT.

Intercomparison of TCCON data from two Fourier transform spectrometers at Lauder, New Zealand

David F. Pollard, John Robinson, Hisako Shiona, and Dan Smale David F. Pollard et al.
  • National Institute of Water & Atmospheric Research Ltd (NIWA), Lauder, New Zealand

Abstract. We describe the change of operational instrument for the routine measurement of column-averaged dry-air mole fraction of several greenhouse gases (denoted Xgas) at the Lauder Total Carbon Column Observing Network (TCCON) site and the steps taken to demonstrate comparability between the two observation systems following a systematic methodology.

Further, we intercompare retrieved Xgas values during an intensive intercomparison period during October and November 2018, when both instruments were performing optimally, and on subsequent, less frequent occasions. The average difference between the two observing systems was found to be well below the expected level of uncertainty for TCCON retrievals for all compared species. In the case of XCO2 the average difference was 0.0264 ± 0.0465 % (0.11 ± 0.19 μmol mol−1).

David F. Pollard et al.

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David F. Pollard et al.

Data sets

TCCON data from Lauder (NZ), Release GGG2014.R0 David Frank Pollard, John Robinson, and Hisako Shiona https://doi.org/10.14291/tccon.ggg2014.lauder03.R0

TCCON data from Lauder (NZ), 125HR, Release GGG2014.R0 V. Sherlock, B. Connor, J. Robinson, H. Shiona, D. Smale, and D. F. Pollard https://doi.org/10.14291/tccon.ggg2014.lauder02.R0/1149298

David F. Pollard et al.

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Latest update: 28 Oct 2020
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Short summary
This work describes the steps taken to ensure a continuous, high quality dataset of column averaged greenhouse gas retrievals from the Total Carbon Column Observing Network (TCCON) site at Lauder, New Zealand, following a change of the Fourier transform spectrometer used to make the measurements from which the retrievals are made.
This work describes the steps taken to ensure a continuous, high quality dataset of column...
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