Preprints
https://doi.org/10.5194/amt-2021-437
https://doi.org/10.5194/amt-2021-437
 
15 Feb 2022
15 Feb 2022
Status: a revised version of this preprint was accepted for the journal AMT and is expected to appear here in due course.

Integrated airborne investigation of the air composition over the Russian Sector of the Arctic

Boris D. Belan1, Gerard Ancellet2, Irina S. Andreeva3, Pavel N. Antokhin1, Viktoria G. Arshinova1, Mikhail Y. Arshinov1, Yurii S. Balin1, Vladimir E. Barsuk4, Sergei B. Belan1, Dmitry G. Chernov1, Denis K. Davydov1, Alexander V. Fofonov1, Georgii A. Ivlev1, Sergei N. Kotel’nikov5, Alexander S. Kozlov6, Artem V. Kozlov1, Katharine Law2, Andrey V. Mikhal’chishin4, Igor A. Moseikin4, Sergei V. Nasonov1, Philippe Nédélec7, Olesya V. Okhlopkova3, Sergei E. Ol’kin3, Mikhail V. Panchenko1, Jean-Daniel Paris8, Iogannes E. Penner1, Igor V. Ptashnik1, Tatyana M. Rasskazchikova1, Irina K. Reznikova3, Oleg A. Romanovskii1, Alexander S. Safatov3, Denis E. Savkin1, Denis V. Simonenkov1, Tatyana K. Sklyadneva1, Gennadii N. Tolmachev1, Semyon V. Yakovlev1, and Polina N. Zenkova1 Boris D. Belan et al.
  • 1V.E. Zuev Institute of Atmospheric Optics SB RAS, Tomsk, 634055, Russia
  • 2Laboratoire Atmosphères, Milieux, Observations Spatiales, LATMOS, UMR 8190, Paris, 78035, France
  • 3VECTOR State Research Center of Virology and Biotechnology, Rospotrebnadzor, Koltsovo, Novosibirsk oblast, 630559, Russia
  • 4S.A. Chaplygin Siberian Aeronautical Research Institute, Novosibirsk, 630051, Russia
  • 5Prokhorov General Physics Institute RAS, Moscow, 119991, Russia
  • 6Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Novosibirsk, 630090, Russia
  • 7Laboratoire d’Aerologie, CNRS-UPS, Toulouse, France
  • 8Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CNRS-CEA-UVSQ, Orme des Merisiers, CEA Saclay, Gif-sur-Yvette, 91191, France

Abstract. The change of the global climate is most pronounced in the Arctic, where the air temperature increases two to three times faster than the global average. This process is associated with an increase in the concentration of greenhouse gases in the atmosphere. There are publications predicting the sharp increase of methane emissions into the atmosphere due to permafrost thawing. Therefore, it is important to study how the air composition in the Arctic changes in the changing climate. In the Russian sector of the Arctic, the air composition was measured only in the surface atmospheric layer at the coastal stations or earlier at the drifting stations. Vertical distributions of gas constituents of the atmosphere and aerosol were determined only in few small regions. That is why the integrated experiment was carried out to measure the composition of the troposphere in the entire Russian sector of the Arctic from onboard the Optik Tu-134 aircraft laboratory in the period of September 4 to 17 of 2020. The aircraft laboratory was equipped with contact and remote measurement facilities. The contact facilities were capable of measuring the concentrations of CO2, CH4, O3, CO, NOX, and SO2, as well as the disperse composition of particles in the size range from 3 nm to 32 µm, black carbon, organic and inorganic components of atmospheric aerosol. The remote facilities were operated to measure the water transparency in the upper layer of the ocean, the chlorophyll content in water, and spectral characteristics of the underlying surface. The measured data have shown that the ocean continues absorbing СО2. This process is most intense over the Barents and Kara Seas. The recorded methane concentration was increased over all the arctic seas, reaching 2090 ppb in the near-water layer over the Kara Sea. The contents of other gas components and black carbon were close to the background level.

In bioaerosol, bacteria predominated among the identified microorganisms. In most samples, they were represented by coccal forms, less often spore-forming and non-spore-bearing rod-shaped bacteria. No dependence of the representation of various bacterial genera on the height and the sampling site was revealed. The most turbid during the experiment was the upper layer of the Chukchi and Bering Seas. The Barents Sea turned out to be the most transparent. The differences in extinction varied more than 1.5 times. In all measurements, except for the Barents Sea, the tendency to an increase in chlorophyll fluorescence in more transparent waters was observed.

Boris D. Belan et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2021-437', Anonymous Referee #1, 22 Feb 2022
    • AC1: 'Reply on RC1', Oleg Romanovskii, 11 Apr 2022
  • RC2: 'Comment on amt-2021-437', Anonymous Referee #2, 26 Feb 2022
    • AC2: 'Reply on RC2', Oleg Romanovskii, 11 Apr 2022

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2021-437', Anonymous Referee #1, 22 Feb 2022
    • AC1: 'Reply on RC1', Oleg Romanovskii, 11 Apr 2022
  • RC2: 'Comment on amt-2021-437', Anonymous Referee #2, 26 Feb 2022
    • AC2: 'Reply on RC2', Oleg Romanovskii, 11 Apr 2022

Boris D. Belan et al.

Boris D. Belan et al.

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Short summary
The change of the global climate is most pronounced in the Arctic, where the air temperature increases faster than the global average. This is associated with an increase in the concentration of greenhouse gases in the atmosphere. It is important to study how the air composition in the Arctic changes in the changing climate. That is why the integrated experiment was carried out to measure the composition of the troposphere in the Russian sector of the Arctic from onboard the aircraft laboratory.