Articles | Volume 23, issue 20
ACP Letters
 | Highlight paper
16 Oct 2023
ACP Letters | Highlight paper |  | 16 Oct 2023

The dehydration carousel of stratospheric water vapor in the Asian summer monsoon anticyclone

Paul Konopka, Christian Rolf, Marc von Hobe, Sergey M. Khaykin, Benjamin Clouser, Elisabeth Moyer, Fabrizio Ravegnani, Francesco D'Amato, Silvia Viciani, Nicole Spelten, Armin Afchine, Martina Krämer, Fred Stroh, and Felix Ploeger

Related authors

Variability and trends in the PV-gradient dynamical tropopause
Katharina Turhal, Felix Plöger, Jan Clemens, Thomas Birner, Franziska Weyland, Paul Konopka, and Peter Hoor
EGUsphere,,, 2024
This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
Short summary
Moist bias in the Pacific upper troposphere and lower stratosphere (UTLS) in climate models affects regional circulation patterns
Felix Ploeger, Thomas Birner, Edward Charlesworth, Paul Konopka, and Rolf Müller
Atmos. Chem. Phys., 24, 2033–2043,,, 2024
Short summary
Lagrangian transport simulations using the extreme convection parameterization: an assessment for the ECMWF reanalyses
Lars Hoffmann, Paul Konopka, Jan Clemens, and Bärbel Vogel
Atmos. Chem. Phys., 23, 7589–7609,,, 2023
Short summary
Tropospheric transport and unresolved convection: numerical experiments with CLaMS 2.0/MESSy
Paul Konopka, Mengchu Tao, Marc von Hobe, Lars Hoffmann, Corinna Kloss, Fabrizio Ravegnani, C. Michael Volk, Valentin Lauther, Andreas Zahn, Peter Hoor, and Felix Ploeger
Geosci. Model Dev., 15, 7471–7487,,, 2022
Short summary
Characterization of transport from the Asian summer monsoon anticyclone into the UTLS via shedding of low potential vorticity cutoffs
Jan Clemens, Felix Ploeger, Paul Konopka, Raphael Portmann, Michael Sprenger, and Heini Wernli
Atmos. Chem. Phys., 22, 3841–3860,,, 2022
Short summary

Related subject area

Subject: Gases | Research Activity: Field Measurements | Altitude Range: Stratosphere | Science Focus: Physics (physical properties and processes)
Gravity-wave-induced cross-isentropic mixing: a DEEPWAVE case study
Hans-Christoph Lachnitt, Peter Hoor, Daniel Kunkel, Martina Bramberger, Andreas Dörnbrack, Stefan Müller, Philipp Reutter, Andreas Giez, Thorsten Kaluza, and Markus Rapp
Atmos. Chem. Phys., 23, 355–373,,, 2023
Short summary
Persistence of moist plumes from overshooting convection in the Asian monsoon anticyclone
Sergey M. Khaykin, Elizabeth Moyer, Martina Krämer, Benjamin Clouser, Silvia Bucci, Bernard Legras, Alexey Lykov, Armin Afchine, Francesco Cairo, Ivan Formanyuk, Valentin Mitev, Renaud Matthey, Christian Rolf, Clare E. Singer, Nicole Spelten, Vasiliy Volkov, Vladimir Yushkov, and Fred Stroh
Atmos. Chem. Phys., 22, 3169–3189,,, 2022
Short summary
Wildfire smoke in the lower stratosphere identified by in situ CO observations
Joram J. D. Hooghiem, Maria Elena Popa, Thomas Röckmann, Jens-Uwe Grooß, Ines Tritscher, Rolf Müller, Rigel Kivi, and Huilin Chen
Atmos. Chem. Phys., 20, 13985–14003,,, 2020
Short summary
Variations in the vertical profile of ozone at four high-latitude Arctic sites from 2005 to 2017
Shima Bahramvash Shams, Von P. Walden, Irina Petropavlovskikh, David Tarasick, Rigel Kivi, Samuel Oltmans, Bryan Johnson, Patrick Cullis, Chance W. Sterling, Laura Thölix, and Quentin Errera
Atmos. Chem. Phys., 19, 9733–9751,,, 2019
Short summary
Controlling variables and emission factors of methane from global rice fields
Jinyang Wang, Hiroko Akiyama, Kazuyuki Yagi, and Xiaoyuan Yan
Atmos. Chem. Phys., 18, 10419–10431,,, 2018
Short summary

Cited articles

Afchine, A., Rolf, C., Costa, A., Spelten, N., Riese, M., Buchholz, B., Ebert, V., Heller, R., Kaufmann, S., Minikin, A., Voigt, C., Zöger, M., Smith, J., Lawson, P., Lykov, A., Khaykin, S., and Krämer, M.: Ice particle sampling from aircraft – influence of the probing position on the ice water content, Atmos. Meas. Tech., 11, 4015–4031,, 2018. a
Avery, M., Winker, D., Heymsfield, A., Vaughan, M., Young, S., Hu, Y., and Trepte, C.: Cloud ice water content retrieved from the CALIOP space-based lidar, Geophys. Res. Lett., 39, L05808,, 2012. a
Avery, M., Davis, S., Rosenlof, K. H., Ye, H., and Dessler, A. E.: Large anomalies in lower stratospheric water vapour and ice during the 2015–2016 El Nino, Nat. Geosci., 10, 405–409,, 2017. a
Baumgartner, M., Rolf, C., Grooß, J.-U., Schneider, J., Schorr, T., Möhler, O., Spichtinger, P., and Krämer, M.: New investigations on homogeneous ice nucleation: the effects of water activity and water saturation formulations, Atmos. Chem. Phys., 22, 65–91,, 2022. a
Brewer, A. W.: Evidence for a world circulation provided by the measurements of helium and water vapour distribution in the stratosphere, Q. J. Roy. Meteor. Soc., 75, 351–363,, 1949. a
Executive editor
The paper exploits recent in-situ observations of water vapour in the lower stratosphere in the StratoClim campaign which was focused on the Asian Monsoon region, accepted as very important as providing a pathway from troposphere to stratosphere for important chemical species. The paper uses trajectory modelling to argue that, whilst very large water vapour concentrations were observed in some locations, significant further dehydration is likely as the air masses are transported, over tens of days, on a spiralling path into the main body of the stratosphere. The conclusion is therefore that these large water vapour concentrations do not imply a substantial moistening of the stratosphere. There has been a long-standing debate about the role of processes on different scales, from the cloud-scale to the regional scale, in controlling stratospheric water vapour, which has an important effect on the radiative balance of the troposphere. In combining in-situ data and trajectory modelling this study should help progress towards scientific consensus on this point.
Short summary
We studied water vapor in a critical region of the atmosphere, the Asian summer monsoon anticyclone, using rare in situ observations. Our study shows that extremely high water vapor values observed in the stratosphere within the Asian monsoon anticyclone still undergo significant freeze-drying and that water vapor concentrations set by the Lagrangian dry point are a better proxy for the stratospheric water vapor budget than rare observations of enhanced water mixing ratios.
Final-revised paper