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    Academic Journals

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• Evaluating cloud liquid detection against Cloudnet using cloud radar Doppler spectra in a pre-trained artificial neural network.

  Authors:Heike Kalesse-Los, Willi Schimmel, Edward Luke, and Patric SeifertFrom:Atmospheric Measurement Techniques (Vol. 15, Issue 2) Peer-Reviewed

  Jan. 20, 2022427 words Article Detection of liquid-containing cloud layers in thick mixed-phase clouds or multi-layer cloud situations from ground-based remote-sensing instruments still poses observational challenges, yet improvements are crucial...

• 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...

• Overview: Fusion of radar polarimetry and numerical atmospheric modelling towards an improved understanding of cloud and precipitation processes.

  Authors:Silke Trömel, Clemens Simmer, Ulrich Blahak, Armin Blanke, Sabine Doktorowski, Florian Ewald, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 23) Peer-Reviewed

  Dec. 1, 2021323 words Brief article Cloud and precipitation processes are still a main source of uncertainties in numerical weather prediction and climate change projections. The Priority Programme "Polarimetric Radar Observations meet Atmospheric...

• 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...

• 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...

• Automated time-height-resolved air mass source attribution for profiling remote sensing applications.

  Authors:Martin Radenz, Patric Seifert, Holger Baars, Athena Augusta Floutsi, Zhenping Yin, and Johannes BühlFrom:Atmospheric Chemistry and Physics (Vol. 21, Issue 4) Peer-Reviewed

  Mar. 1, 2021281 words Brief article Height-resolved air mass source attribution is crucial for the evaluation of profiling ground-based remote sensing observations, especially when using lidar (light detection and ranging) to investigate different aerosol...

• Aerosol and cloud top height information of Envisat MIPAS measurements

  Authors:Sabine Griessbach, Lars Hoffmann, Reinhold Spang, Peggy Achtert, Marc von Hobe, Nina Mateshvili, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 3) Peer-Reviewed

  Mar. 13, 2020446 words Brief article Infrared limb emission instruments have a long history in measuring clouds and aerosol. In particular, the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument aboard ESA's Envisat provides 10...

• 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...

• 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,...

• Helicopter-borne observations of the continental background aerosol in combination with remote sensing and ground-based measurements

  Authors:Birgit Wehner, Patric Seifert, Albert Ansmann, Holger Baars, Florian Ditas, Silvia Henning, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 2) Peer-Reviewed

  Jan. 31, 201858 words Brief article, Repor... Byline: Sebastian Dü,sing, Birgit Wehner, Patric Seifert, Albert Ansmann, Holger Baars, Florian Ditas, Silvia Henning, Nan Ma, Laurent Poulain, Holger Siebert, Alfred Wiedensohler, Andreas Macke To access,...

• 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...

• A prequel to the Dantean Anomaly: the precipitation seesaw and droughts of 1302 to 1307 in Europe.

  Authors:Martin Bauch, Thomas Labbé, Annabell Engel, and Patric SeifertFrom:Climate of the Past (Vol. 16, Issue 6) Peer-Reviewed

  Nov. 25, 2020314 words Brief article The cold/wet anomaly of the 1310s ("Dantean Anomaly") has attracted a lot of attention from scholars, as it is commonly interpreted as a signal of the transition between the Medieval Climate Anomaly (MCA) and the Little...

• 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...

• The HD(CP).sup.2 Observational Prototype Experiment (HOPE) - an overview

  Authors:Andreas Macke, Patric Seifert, Holger Baars, Christian Barthlott, Christoph Beekmans, Andreas Behrendt, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 7) Peer-Reviewed

  Apr. 13, 2017332 words Author abstract, Bri... The HD(CP).sup.2 Observational Prototype Experiment (HOPE) was performed as a major 2-month field experiment in Jülich, Germany, in April and May 2013, followed by a smaller campaign in Melpitz, Germany, in...

• Optical and geometrical properties of cirrus clouds in Amazonia derived from 1 year of ground-based lidar measurements

  Authors:Diego A. Gouveia, Boris Barja, Henrique M. J. Barbosa, Patric Seifert, Holger Baars, Theotonio Pauliquevis, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 5) Peer-Reviewed

  Mar. 15, 2017457 words Brief article Cirrus clouds cover a large fraction of tropical latitudes and play an important role in Earth's radiation budget. Their optical properties, altitude, vertical and horizontal coverage control their radiative forcing,...

• Extreme levels of Canadian wildfire smoke in the stratosphere over central Europe on 21-22 August 2017

  Authors:Albert Ansmann, Holger Baars, Alexandra Chudnovsky, Ina Mattis, Igor Veselovskii, Moritz Haarig, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 16) Peer-Reviewed

  Aug. 20, 2018322 words Author abstract, Bri...

  Light extinction coefficients of 500 Mm.sup.-1, about 20 times higher than after the Pinatubo volcanic eruptions in 1991, were observed by European Aerosol Research Lidar Network (EARLINET) lidars in the...

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

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

  Dec. 8, 2020262 words Brief article In a series of two articles, a novel, robust, and practicable lidar approach is presented that allows us to derive microphysical properties of liquid-water clouds (cloud extinction coefficient, droplet effective radius,...

• 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...

• A STANDARDIZED ATMOSPHERIC MEASUREMENT DATA ARCHIVE FOR DISTRIBUTED CLOUD AND PRECIPITATION PROCESS-ORIENTED OBSERVATIONS IN CENTRAL EUROPE: A multitude of cloud and precipitation observations in Germany are now available in the new Standardized Atmospheric Measurement Data archive.

  Authors:Andrea Lammert, Akio Hansen, Felix Ament, Susanne Crewell, Galina Dick, Verena Grutzun, et al.From:Bulletin of the American Meteorological Society (Vol. 100, Issue 7) Peer-Reviewed

  July 20198,025 words Article 1480LABSTRACT Central Europe has a vital and extensive meteorological research community comprising national weather services, universities, and research organizations and institutes. Nearly all of them are involved in the...