Calibration of TCCON column-averaged CO₂: the first aircraft campaign over European TCCON sites by G. C. Toon, F. Truong, R. Sussmann, M. Schmidt, M. Rettinger, M. Ramonet, M. Palm, J. Notholt, J. V. Lavrič, O. Kolle, K. Katrynski, F. Hase, M. Gisi, C. Gerbig, D. G. Feist, A. Engel, N. M. Deutscher, H. Chen, T. Blumenstock, M. C. Geibel, J. Messerschmidt, T. Warneke, P. O. Wennberg, D. Wunch, I. Xueref-Remy

“…A series of WMO standards in-situ profiles were obtained over European TCCON sites via aircraft and compared with retrievals of CO₂ column amounts from the TCCON instruments. …”
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Updated trends of the stratospheric ozone vertical distribution in the 60° S–60° N latitude range based on the LOTUS regression model by S. Godin-Beekmann, N. Azouz, V. F. Sofieva, D. Hubert, I. Petropavlovskikh, P. Effertz, G. Ancellet, D. A. Degenstein, D. Zawada, L. Froidevaux, S. Frith, J. Wild, S. Davis, W. Steinbrecht, T. Leblanc, R. Querel, K. Tourpali, R. Damadeo, E. Maillard Barras, R. Stübi, C. Vigouroux, C. Arosio, G. Nedoluha, I. Boyd, R. Van Malderen, E. Mahieu, D. Smale, R. Sussmann

“…<p>This study presents an updated evaluation of stratospheric ozone profile trends in the 60<span class="inline-formula">^∘</span> S–60<span class="inline-formula">^∘</span> N latitude range over the 2000–2020 period using an updated version of the Long-term Ozone Trends and Uncertainties in the Stratosphere (LOTUS) regression model that was used to evaluate such trends up to 2016 for the last WMO Ozone Assessment (2018). In addition to the derivation of detailed trends as a function of latitude and vertical coordinates, the regressions are performed with the datasets averaged over broad latitude bands, i.e. 60–35<span class="inline-formula">^∘</span> S, 20<span class="inline-formula">^∘</span> S–20<span class="inline-formula">^∘</span> N and 35–60<span class="inline-formula">^∘</span> N. …”
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Evaluation of MOPITT Version 7 joint TIR–NIR X_CO retrievals with TCCON by J. K. Hedelius, T.-L. He, D. B. A. Jones, B. C. Baier, B. C. Baier, R. R. Buchholz, M. De Mazière, N. M. Deutscher, M. K. Dubey, D. G. Feist, D. G. Feist, D. G. Feist, D. W. T. Griffith, F. Hase, L. T. Iraci, P. Jeseck, M. Kiel, M. Kiel, R. Kivi, C. Liu, I. Morino, J. Notholt, Y.-S. Oh, H. Ohyama, D. F. Pollard, M. Rettinger, S. Roche, C. M. Roehl, M. Schneider, K. Shiomi, K. Strong, R. Sussmann, C. Sweeney, C. Sweeney, Y. Té, O. Uchino, V. A. Velazco, V. A. Velazco, W. Wang, T. Warneke, P. O. Wennberg, P. O. Wennberg, H. M. Worden, D. Wunch

“…When using TCCON spectrometric column retrievals without the standard airmass correction or scaling to aircraft (WMO scale), the ground- and satellite-based observations overall agree to better than 0.5&thinsp;%. …”
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