The role of air–sea fluxes for the water vapour isotope signals in the cold and warm sectors of extratropical cyclones over the Southern Ocean

Thurnherr, Iris; Hartmuth, Katharina; Jansing, Lukas; Gehring, Josué; Boettcher, Maxi; Gorodetskaya, Irina; Werner, Martin; Wernli, Heini; Aemisegger, Franziska

doi:https://doi.org/10.5194/wcd-2-331-2021

Articles | Volume 2, issue 2

https://doi.org/10.5194/wcd-2-331-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/wcd-2-331-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 2, issue 2

Research article

|

14 Apr 2021

Research article |

| 14 Apr 2021

The role of air–sea fluxes for the water vapour isotope signals in the cold and warm sectors of extratropical cyclones over the Southern Ocean

Iris Thurnherr, Katharina Hartmuth, Lukas Jansing, Josué Gehring, Maxi Boettcher, Irina Gorodetskaya, Martin Werner, Heini Wernli, and Franziska Aemisegger

Supplement

https://doi.org/10.5194/wcd-2-331-2021-supplement

Data sets

Numerical weather simulations using COSMOiso from Dec 2016 – March 2017 along the ship track of the Antarctic Circumnavigation Expedition Iris Thurnherr, Lukas Jansing, Franziska Aemisegger, and Heini Wernli https://doi.org/10.3929/ethz-b-000445744

Vertical profiles of Doppler spectra of hydrometeors from a Micro Rain Radar recorded during the austral summer of 2016/2017 in the Southern Ocean on the Antarctic Circumnavigation Expedition (ACE). Josué Gehring, Iris Thurnherr, and Pascal Graf https://doi.org/10.5281/zenodo.3929289

Atmospheric profiling data collected from radiosondes in the Southern Ocean in the austral summer of 2016/2017 during the Antarctic Circumnavigation Expedition. I. V. Gorodetskaya, I. Thurnherr, M. Tsukernik, P. Graf, F. Aemisegger, H. Wernli, and F. M. Ralph https://doi.org/10.5281/zenodo.4382460

Short summary

Extratropical cyclones are important for the transport of moisture from low to high latitudes. In this study, we investigate how the isotopic composition of water vapour is affected by horizontal temperature advection associated with extratropical cyclones using measurements and modelling. It is shown that air–sea moisture fluxes induced by this horizontal temperature advection lead to the strong variability observed in the isotopic composition of water vapour in the marine boundary layer.