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    Academic Journals

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• The unexpected smoke layer in the High Arctic winter stratosphere during MOSAiC 2019-2020.

  Authors:Kevin Ohneiser, Albert Ansmann, Alexandra Chudnovsky, Ronny Engelmann, Christoph Ritter, Igor Veselovskii, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 20) Peer-Reviewed

  Oct. 22, 2021516 words Article During the 1-year MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition, the German icebreaker Polarstern drifted through Arctic Ocean ice from October 2019 to May 2020, mainly at...

• Wildfire smoke, Arctic haze, and aerosol effects on mixed-phase and cirrus clouds over the North Pole region during MOSAiC: an introduction.

  Authors:Ronny Engelmann, Albert Ansmann, Kevin Ohneiser, Hannes Griesche, Martin Radenz, Julian Hofer, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 17) Peer-Reviewed

  Sept. 9, 2021441 words Article An advanced multiwavelength polarization Raman lidar was operated aboard the icebreaker Polarstern during the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition to continuously...

• The unprecedented 2017-2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET.

  Authors:Holger Baars, Albert Ansmann, Kevin Ohneiser, Moritz Haarig, Ronny Engelmann, Dietrich Althausen, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 23) Peer-Reviewed

  Dec. 13, 2019483 words Article Six months of stratospheric aerosol observations with the European Aerosol Research Lidar Network (EARLINET) from August 2017 to January 2018 are presented. The decay phase of an unprecedented, record-breaking...

• Tropospheric and stratospheric wildfire smoke profiling with lidar: mass, surface area, CCN, and INP retrieval.

  Authors:Albert Ansmann, Kevin Ohneiser, Rodanthi-Elisavet Mamouri, Daniel A. Knopf, Igor Veselovskii, Holger Baars, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 12) Peer-Reviewed

  June 29, 2021284 words Brief article We present retrievals of tropospheric and stratospheric height profiles of particle mass, volume, surface area, and number concentrations in the case of wildfire smoke layers as well as estimates of smoke-related cloud...

• Validation of Aeolus wind products above the Atlantic Ocean.

  Authors:Holger Baars, Alina Herzog, Birgit Heese, Kevin Ohneiser, Karsten Hanbuch, Julian Hofer, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 11) Peer-Reviewed

  Nov. 11, 2020397 words Brief article In August 2018, the first Doppler wind lidar in space called Atmospheric Laser Doppler Instrument (ALADIN) was launched on board the satellite Aeolus by the European Space Agency (ESA). Aeolus measures profiles of one...

• Smoke of extreme Australian bushfires observed in the stratosphere over Punta Arenas, Chile, in January 2020: optical thickness, lidar ratios, and depolarization ratios at 355 and 532 nm.

  Authors:Kevin Ohneiser, Albert Ansmann, Holger Baars, Patric Seifert, Boris Barja, Cristofer Jimenez, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 13) Peer-Reviewed

  July 10, 2020359 words Brief article We present particle optical properties of stratospheric smoke layers observed with multiwavelength polarization Raman lidar over Punta Arenas (53.2.sup."  S, 70.9.sup."  W), Chile, at the southernmost tip...

• Contrasting ice formation in Arctic clouds: surface-coupled vs. surface-decoupled clouds.

  Authors:Hannes J. Griesche, Kevin Ohneiser, Patric Seifert, Martin Radenz, Ronny Engelmann, and Albert AnsmannFrom:Atmospheric Chemistry and Physics (Vol. 21, Issue 13) Peer-Reviewed

  July 9, 2021422 words Article In the Arctic summer of 2017 (1 June to 16 July) measurements with the OCEANET-Atmosphere facility were performed during the Polarstern cruise PS106. OCEANET comprises amongst other instruments the multiwavelength...

• Aerosol measurements with a shipborne Sun-sky-lunar photometer and collocated multiwavelength Raman polarization lidar over the Atlantic Ocean.

  Authors:Zhenping Yin, Albert Ansmann, Holger Baars, Patric Seifert, Ronny Engelmann, Martin Radenz, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 10) Peer-Reviewed

  Oct. 28, 2019215 words Technical report, Br...

  A shipborne Sun-sky-lunar photometer of type CE318-T was tested during two trans-Atlantic cruises aboard the German research vessel Polarstern from 54.sup."  N to 54.sup."  S in May/June and December...