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    Academic Journals

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• First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dust.

  Authors:Moritz Haarig, Albert Ansmann, Ronny Engelmann, Holger Baars, Carlos Toledano, Benjamin Torres, et al.From:Atmospheric Chemistry and Physics (Vol. 22, Issue 1) Peer-Reviewed

  Jan. 11, 2022325 words Brief article Two layers of Saharan dust observed over Leipzig, Germany, in February and March 2021 were used to provide the first-ever lidar measurements of the dust lidar ratio (extinction-to-backscatter ratio) and linear...

• Hemispheric contrasts in ice formation in stratiform mixed-phase clouds: disentangling the role of aerosol and dynamics with ground-based remote sensing.

  Authors:Martin Radenz, Johannes Bühl, Patric Seifert, Holger Baars, Ronny Engelmann, Boris Barja González, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 23) Peer-Reviewed

  Dec. 8, 2021360 words Brief article Multi-year ground-based remote-sensing datasets were acquired with the Leipzig Aerosol and Cloud Remote Observations System (LACROS) at three sites. A highly polluted central European site (Leipzig, Germany), a polluted...

• 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...

• Optical and geometrical aerosol particle properties over the United Arab Emirates.

  Authors:Maria Filioglou, Elina Giannakaki, John Backman, Jutta Kesti, Anne Hirsikko, Ronny Engelmann, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 14) Peer-Reviewed

  July 27, 2020409 words Article One year of ground-based night-time Raman lidar observations has been analysed under the Optimization of Aerosol Seeding In rain enhancement Strategies (OASIS) project, in order to characterize the aerosol particle...

• Application of the shipborne remote sensing supersite OCEANET for profiling of Arctic aerosols and clouds during Polarstern cruise PS106.

  Authors:Hannes J. Griesche, Patric Seifert, Albert Ansmann, Holger Baars, Carola Barrientos Velasco, Johannes Bühl, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 10) Peer-Reviewed

  Oct. 9, 2020382 words Brief article From 25 May to 21 July 2017, the research vessel Polarstern performed the cruise PS106 to the high Arctic in the region north and northeast of Svalbard. The mobile remote-sensing platform OCEANET was deployed aboard...

• 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...

• Depolarization and lidar ratios at 355, 532, and 1064 nm and microphysical properties of aged tropospheric and stratospheric Canadian wildfire smoke

  Authors:Moritz Haarig, Albert Ansmann, Holger Baars, Cristofer Jimenez, Igor Veselovskii, Ronny Engelmann, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 16) Peer-Reviewed

  Aug. 20, 2018258 words Brief article, Repor...

  We present spectrally resolved optical and microphysical properties of western Canadian wildfire smoke observed in a tropospheric layer from 5-6.5 km height and in a stratospheric layer from 15-16 km...

• Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia.

  Authors:Julian Hofer, Albert Ansmann, Dietrich Althausen, Ronny Engelmann, Holger Baars, Sabur F. Abdullaev, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 8) Peer-Reviewed

  Apr. 21, 2020498 words Article For the first time, continuous, vertically resolved long-term aerosol measurements were conducted with a state-of-the-art multiwavelength lidar over a Central Asian site. Such observations are urgently required in...

• Optical properties of Central Asian aerosol relevant for spaceborne lidar applications and aerosol typing at 355 and 532 nm.

  Authors:Julian Hofer, Albert Ansmann, Dietrich Althausen, Ronny Engelmann, Holger Baars, Khanneh Wadinga Fomba, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 15) Peer-Reviewed

  Aug. 6, 2020362 words Brief article For the first time, a dense data set of particle extinction-to-backscatter ratios (lidar ratios), linear depolarization ratios, and backscatter- and extinction-related Ãngström exponents for a Central Asian site are...

• The dual-field-of-view polarization lidar technique: a new concept in monitoring aerosol effects in liquid-water clouds - case studies.

  Authors:Cristofer Jimenez, Albert Ansmann, Ronny Engelmann, David Donovan, Aleksey Malinka, Patric Seifert, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 23) Peer-Reviewed

  Dec. 8, 2020379 words Brief article In a companion article (Jimenez et al., 2020), we introduced a new lidar method to derive microphysical properties of liquid-water clouds (cloud extinction coefficient, droplet effective radius, liquid-water content,...

• The automated multiwavelength Raman polarization and water-vapor lidar Polly.sup.XT: the neXT generation

  Authors:Ronny Engelmann, Thomas Kanitz, Holger Baars, Birgit Heese, Dietrich Althausen, Annett Skupin, et al.From:Atmospheric Measurement Techniques (Vol. 9, Issue 4) Peer-Reviewed

  Apr. 25, 2016220 words Brief article The atmospheric science community demands autonomous and quality-assured vertically resolved measurements of aerosol and cloud properties. For this purpose, a portable lidar called Polly was developed at TROPOS in 2003....

• 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...

• Depolarization and lidar ratios at 355, 532, and 1064 nm and microphysical properties of aged tropospheric and stratospheric Canadian wildfire smoke

  Authors:Moritz Haarig, Albert Ansmann, Holger Baars, Cristofer Jimenez, Igor Veselovskii, Ronny Engelmann, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 16) Peer-Reviewed

  Aug. 20, 2018342 words Author abstract, Bri...

  We present spectrally resolved optical and microphysical properties of western Canadian wildfire smoke observed in a tropospheric layer from 5-6.5 km height and in a stratospheric layer from 15-16 km...

• Triple-wavelength depolarization-ratio profiling of Saharan dust over Barbados during SALTRACE in 2013 and 2014

  Authors:Moritz Haarig, Albert Ansmann, Dietrich Althausen, Andr&#xE9 Klepel, Volker Freudenthaler, Carlos Toledano, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 17) Peer-Reviewed

  Sept. 13, 2017355 words Brief article, Repor... Triple-wavelength polarization lidar measurements in Saharan dust layers were performed at Barbados (13.1° N, 59.6° W), 5000-8000 km west of the Saharan dust sources, in the framework of the Saharan Aerosol...

• Target categorization of aerosol and clouds by continuous multiwavelength-polarization lidar measurements

  Authors:Holger Baars, Patric Seifert, Ronny Engelmann, and Ulla WandingerFrom:Atmospheric Measurement Techniques (Vol. 10, Issue 9) Peer-Reviewed

  Sept. 1, 2017328 words Brief article, Repor... Absolute calibrated signals at 532 and 1064 nm and the depolarization ratio from a multiwavelength lidar are used to categorize primary aerosol but also clouds in high temporal and spatial resolution....

• Ice-nucleating particle versus ice crystal number concentrationin altocumulus and cirrus layers embedded in Saharan dust:a closure study.

  Authors:Albert Ansmann, Rodanthi-Elisavet Mamouri, Johannes Bühl, Patric Seifert, Ronny Engelmann, Julian Hofer, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 23) Peer-Reviewed

  Dec. 13, 2019492 words Article For the first time, a closure study of the relationship between the ice-nucleating particle concentration (INP; INPC) and ice crystal number concentration (ICNC) in altocumulus and cirrus layers, solely based on...

• GARRLiC and LIRIC: strengths and limitations for the characterization of dust and marine particles along with their mixtures

  Authors:Alexandra Tsekeri, Anton Lopatin, Vassilis Amiridis, Eleni Marinou, Julia Igloffstein, Nikolaos Siomos, et al.From:Atmospheric Measurement Techniques (Vol. 10, Issue 12) Peer-Reviewed

  Dec. 20, 2017243 words Author abstract, Bri... 970LThe Generalized Aerosol Retrieval from Radiometer and Lidar Combined data algorithm (GARRLiC) and the LIdar-Radiometer Inversion Code (LIRIC) provide the opportunity to study the aerosol vertical distribution by...