Contrasting extremely warm and long-lasting cold air anomalies in the North Atlantic sector of the Arctic during the HALO-(𝒜 𝒞)<sup>3</sup> campaign

Walbröl, Andreas; Michaelis, Janosch; Becker, Sebastian; Dorff, Henning; Ebell, Kerstin; Gorodetskaya, Irina; Heinold, Bernd; Kirbus, Benjamin; Lauer, Melanie; Maherndl, Nina; Maturilli, Marion; Mayer, Johanna; Müller, Hanno; Neggers, Roel A. J.; Paulus, Fiona M.; Röttenbacher, Johannes; Rückert, Janna E.; Schirmacher, Imke; Slättberg, Nils; Ehrlich, André; Wendisch, Manfred; Crewell, Susanne

doi:https://doi.org/10.5194/acp-24-8007-2024

Articles | Volume 24, issue 13

https://doi.org/10.5194/acp-24-8007-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

HALO-(AC)³ – an airborne campaign to study air...

https://doi.org/10.5194/acp-24-8007-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 13

Research article

|

15 Jul 2024

Research article |

| 15 Jul 2024

Contrasting extremely warm and long-lasting cold air anomalies in the North Atlantic sector of the Arctic during the HALO-(𝒜 𝒞)³ campaign

Andreas Walbröl, Janosch Michaelis, Sebastian Becker, Henning Dorff, Kerstin Ebell, Irina Gorodetskaya, Bernd Heinold, Benjamin Kirbus, Melanie Lauer, Nina Maherndl, Marion Maturilli, Johanna Mayer, Hanno Müller, Roel A. J. Neggers, Fiona M. Paulus, Johannes Röttenbacher, Janna E. Rückert, Imke Schirmacher, Nils Slättberg, André Ehrlich, Manfred Wendisch, and Susanne Crewell

Data sets

Sea ice concentration daily gridded data from 1979 to present derived from satellite observations Copernicus Climate Change Service (C3S) https://doi.org/10.24381/CDS.3CD8B812

Unified Airborne Active and Passive Microwave Measurements over Arctic Sea Ice and Ocean during the HALO-(AC)3 Campaign in Spring 2022 Henning Dorff et al. https://doi.org/10.1594/PANGAEA.963250

ERA5 hourly data on pressure levels from 1959 to present H. Hersbach et al. https://doi.org/10.24381/cds.bd0915c6

ERA5 hourly data on single levels from 1959 to present H. Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

Continuous meteorological observations at station Ny-Ålesund (2011-08 et seq) Marion Maturilli https://doi.org/10.1594/PANGAEA.914979

High resolution radiosonde measurements from station Ny-Ålesund (2017-04 et seq) Marion Maturilli https://doi.org/10.1594/PANGAEA.914973

Ceilometer cloud base height from station Ny-Ålesund (2017-08 et seq) Marion Maturilli https://doi.org/10.1594/PANGAEA.942331

High resolution radiosonde measurements from station Ny-Ålesund (2017-04 et seq) Marion Maturilli and Markus Kayser https://doi.org/10.1594/PANGAEA.914973

Homogenized radiosonde record at station Ny-Ålesund, Spitsbergen, 2015-2016 Marion Maturilli and Markus Kayser https://doi.org/10.1594/PANGAEA.875196

Global Sea Ice Concentration Climate Data Record v2.0 - Multimission OSI SAF https://doi.org/10.15770/EUM_SAF_OSI_0008

Model code and software

Codes for: Contrasting extremely warm and long-lasting cold air anomalies in the North Atlantic sector of the Arctic during the HALO-(AC)3 campaign Johanna Mayer et al. https://doi.org/10.5281/zenodo.11300722

Short summary

To support the interpretation of the data collected during the HALO-(AC)³ campaign, which took place in the North Atlantic sector of the Arctic from 7 March to 12 April 2022, we analyze how unusual the weather and sea ice conditions were with respect to the long-term climatology. From observations and ERA5 reanalysis, we found record-breaking warm air intrusions and a large variety of marine cold air outbreaks. Sea ice concentration was mostly within the climatological interquartile range.

Contrasting extremely warm and long-lasting cold air anomalies in the North Atlantic sector of the Arctic during the HALO-(𝒜 𝒞)3 campaign

Data sets

Model code and software

Contrasting extremely warm and long-lasting cold air anomalies in the North Atlantic sector of the Arctic during the HALO-(𝒜 𝒞)³ campaign