Observations of stratospheric streamers and  frozen-in anticyclones in aerosol extinction

Löns, Christian; Eixmann, Ronald; Pohl, Christine; Rozanov, Alexei; von Savigny, Christian

doi:10.5194/acp-25-18209-2025

Articles | Volume 25, issue 23

https://doi.org/10.5194/acp-25-18209-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-18209-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 23

Research article

|

11 Dec 2025

Research article |

| 11 Dec 2025

Observations of stratospheric streamers and frozen-in anticyclones in aerosol extinction

Christian Löns, Ronald Eixmann, Christine Pohl, Alexei Rozanov, and Christian von Savigny

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Cumulative views and downloads (calculated since 05 Sep 2025)

Month	HTML	PDF	XML	Total
Sep 2025	5,336	88	22	5,446
Oct 2025	200	94	34	328
Nov 2025	84	74	12	170
Dec 2025	341	141	24	506
Jan 2026	264	147	8	419
Feb 2026	569	124	19	712
Mar 2026	151	277	16	444
Apr 2026	91	135	11	237
May 2026	188	87	4	279
Jun 2026	20	16	1	37
Jul 2026	91	42	17	150
Aug 2026	35	43	14	92
Sep 2026	91	150	99	340
Oct 2026	46	32	43	121

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Short summary

During the polar vortex season, so-called streamers can transport tropical air towards the pole in the middle stratosphere. This tropical air can get trapped in high-pressure areas at high latitudes after the polar vortex breaks down. In this study, remote sensing instruments are used to observe the course of such streamers by measuring the scattered solar radiation. Aerosols get transported to high latitudes at an altitude of about 25–35 km, increasing the aerosol mass there significantly.