An intercomparison of total column-averaged nitrous oxide between ground-based FTIR TCCON and NDACC measurements at seven sites and comparisons with the GEOS-Chem model

• Published in: Atmospheric Measurement Techniques
• Main Authors: M. Zhou, B. Langerock, K. C. Wells, D. B. Millet, C. Vigouroux, M. K. Sha, C. Hermans, J.-M. Metzger, R. Kivi, P. Heikkinen, D. Smale, D. F. Pollard, N. Jones, N. M. Deutscher, T. Blumenstock, M. Schneider, M. Palm, J. Notholt, J. W. Hannigan, M. De Mazière
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2019
• Subjects: Environmental engineering; TA170-171; Earthwork. Foundations; TA715-787; Ny-Ålesund; Sodankylä; Ny Ålesund
• Online Access: https://doi.org/10.5194/amt-12-1393-2019; https://doaj.org/article/0302b4e5b9bc4ba686dfa900c4da3aea

Nitrous oxide ( N 2 O ) is an important greenhouse gas and it can also generate nitric oxide, which depletes ozone in the stratosphere. It is a common target species of ground-based Fourier transform infrared (FTIR) near-infrared (TCCON) and mid-infrared (NDACC) measurements. Both TCCON and NDACC networks provide a long-term global distribution of atmospheric N 2 O mole fraction. In this study, the dry-air column-averaged mole fractions of N 2 O ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M4" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msub><mi mathvariant="normal">X</mi><mrow><msub><mi mathvariant="normal">N</mi><mn mathvariant="normal">2</mn></msub><mi mathvariant="normal">O</mi></mrow></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="25pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="7083feeaa337c360bc1dec6cdd9e436c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="amt-12-1393-2019-ie00001.svg" width="25pt" height="14pt" src="amt-12-1393-2019-ie00001.png"/></svg:svg> ) from the TCCON and NDACC measurements are compared against each other at seven sites around the world (Ny-Ålesund, Sodankylä, Bremen, Izaña, Réunion, Wollongong, Lauder) in the time period of 2007–2017. The mean differences in <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msub><mi mathvariant="normal">X</mi><mrow><msub><mi mathvariant="normal">N</mi><mn mathvariant="normal">2</mn></msub><mi mathvariant="normal">O</mi></mrow></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="25pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="5e6a681c49fd20b61f27782a4f0ae370"><svg:image ...