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====== Maximilian Maahn ======

**Head of research group [[https://www.physgeo.uni-leipzig.de/en/institut-fuer-meteorologie/forschung/arbeitsgruppe-maahn/forschung|clouD and pRecipitation Observations for Process Studies
 (drOPS)]]**

<panel type="primary" title="News" >
  * Nils Pfeifer's article about quantifying the droplet fragmentation secondary ice process has been published in  [[https://doi.org/10/hbb7vv|Communications Earth & Environment]]!
  * The WIVERN satellite mission will be the 11th ESA Earth Explorer! [[https://www.uni-leipzig.de/newsdetail/artikel/leipziger-wissenschaftler-an-neuer-weltraummission-der-esa-beteiligt-2025-09-23|German Press Release]] [[https://www.esa.int/Applications/Observing_the_Earth/FutureEO/ESA_selects_WIVERN_as_11th_Earth_Explorer_mission|English Press Release]]
  * Listen to a (German) podcast interview about my background and my work: [[https://podcastaddict.com/episode/https%3A%2F%2Fmeteo-upas.podcaster.de%2Fkonvergenzzone%2Fmedia%2FKonvergenzzone_2025_F1.mp3&podcastId=5199270 |Podcast Konvergenzzone]]
  * Check out our new paper about riming-dependent snowfall rate retrievals with W-band radars: https://doi.org/10.5194/egusphere-2024-3916
  * Congratulations to Nina Maherndl for successfully defending her PhD!
  * The [[https://unileipzig.pageflow.io/dem-schnee-auf-der-spur|multimedia feature about our contribution to the SAIL campaign]] is now online.   
  * The ESA Earth Explorer 11 candidate satellite mission [[https://wivern.polito.it/|WIVERN]] has been selected for phase A![[https://www.physes.uni-leipzig.de/institut-fuer-meteorologie/aktuelles/newsdetail/artikel/entscheidender-fortschritt-fuer-esa-satellitenmission-zur-beobachtung-von-wind-innerhalb-von-wolken-2023-11-23|German News]],  [[https://www.uni-leipzig.de/newsdetail/artikel/bessere-wettervorhersagen-mit-hilfe-aus-dem-all-2023-12-01|German Interview]],  [[https://www.esa.int/Applications/Observing_the_Earth/FutureEO/Cairt_and_Wivern_Earth_Explorer_candidates_go_forward|English news]]
  * Check out the preprint of our new VISSS paper [[https://egusphere.copernicus.org/preprints/2023/egusphere-2023-655]]
  * Read a background article (in German) about our contribution to the SAIL campaign in Colorado [[https://magazin.uni-leipzig.de/bloggen/bloggen/artikel/dem-schnee-auf-der-spur-messkampagne-auf-ueber-2800-metern-hoehe-2023-01-02|Leipziger Universitäts Magazin]]
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Privatdozent Dr. Maximilian Maahn\\
Phone: +49 341 97-32853\\
<maximilian.maahn@uni-leipzig.de>\\
Institut für Meteorologie\\
Stephanstraße 3, Room 111\\
04103 Leipzig
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**[[http://orcid.org/0000-0002-2580-9100|ORCID Profile]] [[https://scholar.google.com/citations?user=vgyek20AAAAJ|Google Scholar Profile]] [[https://publons.com/researcher/1329533/maximilian-maahn |Publons Profile]]**


Maximilian Maahn joined the Leipzig Institute for Meteorology in July 2020 and leads the drOPS (clouD and pRecipitation Observations for Process Studies) group. His main research interests include enhancing radar observations of polar clouds and precipitation and using these observations for understanding precipitation formation in clouds. He is currently developing a novel in situ sensor for snowfall, the Video In Situ Snowfall Sensor (VISSS). 
===== CV =====
**Professional career**
  * since 07/2020: Leipzig University, leader of the drOPS (clouD and pRecipitation Observations for Process Studies) group
  * 03/2016 - 05/2020: Cooperative Institute for Research in Environmental Sciences (CIRES) of the NOAA Earth System Research Laboratories and the University of Colorado Boulder
  * 05/2011 - 02/2016: University of Cologne
  * 01/2011 - 05/2011: Bonn University
**Education**
  * 06/2025: Leipzig University: Meteorology (Habilitation & Privatdozent). Thesis: [[https://doi.org/10.5281/zenodo.17421925|Advanced Remote Sensing and In Situ Observations of Aerosols, Clouds, and  Precipitation to Improve Process Understanding of the Arctic Climate System]].
  * 05/2011 - 01/2015: University of Cologne: Meteorology (PhD). Thesis: [[http://kups.ub.uni-koeln.de/6002/|Exploiting vertically pointing Doppler radar for advancing snow and ice cloud observations]].
  * 01/2009 - 06/2009: University Centre in Svalbard: Semester abroad
  * 10/2005 - 11/2010: Bonn University: Meteorology (Diplom). Thesis: Measuring Precipitation with Micro Rain Radars in Svalbard.
**Qualifications**
  * 11/2024: Mental Health First Aid (MHFA) first aider
===== Teaching =====

  * [[https://moodle2.uni-leipzig.de/course/view.php?id=31062|Lecture Physics of the Atmospheric Boundary Layer]]
  * [[https://moodle2.uni-leipzig.de/course/view.php?id=30301|Lecture Applied Meteorology]]
  * [[https://moodle2.uni-leipzig.de/course/view.php?id=31231|Lab Course Meteorological Field Experiments]]
  * [[https://moodle2.uni-leipzig.de/course/view.php?id=31433|Exercise Introduction Climatology]]
  * [[https://moodle2.uni-leipzig.de/course/view.php?id=29576|Exercise Introduction Meteorology]]

===== Professional Activities =====
  * Member [[https://wivern.polito.it/|ESA WIVERN]] Mission Advisory Group (since 2021), [[https://www.arm.gov/about/constituent-groups/uec|ARM User Executive Committee]] (2018 - 2020)
  * Editor [[https://www.atmospheric-measurement-techniques.net|Atmospheric Measurement Techniques]] (since 2020), Associate Editor [[https://journals.ametsoc.org/toc/apme/current|Journal of Applied Meteorology and Climatology]] (2016 - 2020)
  * Reviewer (paper): Atmospheric Chemistry and Physics, Atmospheric Measurement Techniques, Earth and Space Science, Geophysical Research Letters, Hydrology and Earth System Sciences, IEEE Transactions on Geoscience and Remote Sensing, Journal of Applied Meteorology and Climatology,  Journal of Atmospheric and Oceanic Technology, Journal of the Atmospheric Sciences, Journal of Geophysical Research, Nature Scientific Reports, Remote Sensing
  * Reviewer (projects): Agence Nationale de la Recherche, DOE Atmospheric System Research program, Swiss National Science Foundation
  * Conference Program Committee Member: [[https://ams.confex.com/ams/38RADAR/webprogram/meeting.html|AMS 38th Conference on Radar Meteorology 2017]], [[http://erad2016.mgm.gov.tr/|9th European Conference on Radar in Meteorology 2016]], International Summer Snowfall Workshop [[http://www.met.reading.ac.uk/~sws04cdw/issw3_programme.html| 2021]], [[https://monsun.meteo.uni-leipzig.de/~drops/issw4/| 2023]], [[https://www.met.reading.ac.uk/~sws04cdw/issw5.html|2025]]
  * Session (Co)convener: EGU General Assembly session "Clouds, moisture, and precipitation in the Polar Regions: Sources, processes and impacts" 2024, 2025, 2026
  * Organizer: Young Scientists Networking Meeting at the AMS 38th Conference on Radar Meteorology 2017

===== Grants =====
  * 08/2026-07/2029: DFG project Quantifying Ice-Ice collisions in a natural Laboratory QuIIL (295 k€).
  * 07/2024-06/2025: [[https://wivern.polito.it|ESA WIVERN]]. Mission Performance and requirement consolidation activity (150k€)
  * 01/2024-12/2027: [[http://www.ac3-tr.de/|DFG (𝒜𝒞)³ project E05]]. Process-level Understanding of Sublimation and Evaporation of Precipitation (336 k€). 
  * 09/2023-12/2024: SMWK (Saxon State Ministry for Science, Culture and Tourism) project for preparing Breathing Nature Excellence Initiative (80 k€).
  * 09/2023-08/2026: DFG project Evaluating Microphysical Pathways Of Midlatitude Snow Formation EMPOS (256 k€).
  * 06/2022-05/2026: [[https://www2.meteo.uni-bonn.de/spp2115/doku.php?id=obj2_corsipp|DFG SPP PROM project CORSIPP]]. Characterization of orography-influenced riming and secondary ice production and their effects on precipitation rates using radar polarimetry and Doppler spectra (349 k€).
  * 01/2021-12/2023:    [[http://www.ac3-tr.de/|DFG (𝒜𝒞)³ project B08]]. Characterising the spatial variability of ice water content in and below mixed-phase clouds (166 k€). 
  * 05/2019:    [[https://cires.colorado.edu/institutional-programs/innovative-research-program/projects|CIRES Innovative Research Program]]. Development of a visual in-situ snowfall sensor (VISSS) for MOSAiC ($ 20k).
  * 07/2015-12/2015:  [[https://geosciences.uni-koeln.de/gsgs|Graduate School of Geosciences of the University of Cologne]]. Potential of higher order moments of the radar Doppler spectrum for retrieving microphysical and kinematic properties of Arctic ice clouds (13k€)



===== Software =====
  * [[https://github.com/maahn/pyOptimalEstimation|pyOptimalEstimation]] Python Optimal Estimation Library
  * [[https://github.com/maahn/IMProToo|IMProToo]] Improved Mrr Processing Tool
  * [[https://github.com/igmk/pamtra|PAMTRA]] & [[https://github.com/maahn/pamtra2|PAMTRA]] 2 Passive and Active Microwave TRAnsfer model
  * [[https://github.com/maahn/VISSSlib|VISSSlib]] Video In situ Snowfall Sensor Processing Library

===== Publications =====

drOPS team members are in **bold**. //Data (DXX) und code (CXX) publications are in italic.//

== Submitted/in review ==

51) Lochmann, M., B. Haest, T. Vogl, R. van Klink, **F. I. Addison, M. Maahn**, C. Wirth, J. Quaas, and H. Kalesse-Los, Derivation of aerial insect concentration with triple frequency cloud radar observations. TGRS (in review).\\

==2026==
50) Teisseire, A., P. Seifert, K. Ohneiser, **M. Maahn**, R. Spirig, and J. Henneberger, 2026: Evaluation of the Vertical Distribution of Particle Shape (VDPS) method with in situ measurements and assessment of the impact of non-Rayleigh scattering. Atmos. Meas. Tech., 19, 2897–2921, https://doi.org/10/hb2cqq. \\
49) Kötsche, A., **M. Maahn, V. Ettrichrätz**, and H. Kalesse-Los, 2026: Snow microphysical processes in orographic turbulence revealed by cloud radar and in situ snowfall camera observations. Atmos. Chem. Phys., 26, 3277–3297, https://doi.org/10.5194/acp-26-3277-2026. \\
48) Ohneiser, K., M. Hartmann, H. Wex, P. Seifert, A. Hardt, A. Miller, K. Baudrexl, W. Thomas, **V. Ettrichrätz**, **M. Maahn**, T. Gaudek, W. Schimmel, F. Senf, H. Griesche, M. Radenz, and J. Henneberger, 2026: Ice-nucleating particle depletion in the wintertime boundary layer in the pre-alpine region during stratus cloud conditions. Atmos. Chem. Phys., 26, 3223–3236, https://doi.org/10/hbq874.\\
47) Pfreundschuh, S., M. Arulraj, A. Behrangi, L. Bogerd, A. J. P. Calheiros, D. Casella, N. Dolatabadi, C. Guilloteau, J. Gong, C. D. Kummerow, P. Kirstetter, G. Lee, **M. Maahn**, L. Milani, G. Panegrossi, R. Palharini, V. Petković, S. Ryu, P. Sanó, and J. Tan, 2026: A Benchmark Dataset for Satellite-Based Estimation and Detection of Rain. Sci. Data, https://doi.org/10/hbk44p. 

==2025==
46) Ohneiser, K., P. Seifert, W. Schimmel, F. Senf, T. Gaudek, M. Radenz, A. Teisseire, **V. Ettrichrätz**, T. Vogl, N. **Maherndl, N. Pfeifer**, J. Henneberger, A. J. Miller, N. Omanovic, C. Fuchs, H. Zhang, F. Ramelli, R. Spirig, A. Kötsche, H. Kalesse-Los, **M. Maahn**, H. Corden, A. Berne, M. Hajipour, H. Griesche, J. Hofer, R. Engelmann, A. Skupin, A. Ansmann, and H. Baars, 2025: Impact of seeder-feeder cloud interaction on precipitation formation: a case study based on extensive remote-sensing, in situ and model data. Atmos. Chem. Phys., 25, 17363–17386, https://doi.org/10/hbc8qs.\\
45) **Pfeifer, N.**, B. Mom, D. Moisseev, S. Hartmann, J. Meusel, C. Hoose, and **M. Maahn**, 2025: Efficient ice multiplication from freezing raindrop fragmentation. Commun. Earth Environ., 6, 942, https://doi.org/10/hbb7vv.\\
44) Kötsche, A., A. Myagkov, L. von Terzi, **M. Maahn**, **V. Ettrichrätz**, T. Vogl, A. Ryzhkov, P. Bukovcic, D. Ori, and H. Kalesse-Los, 2025: Investigating KDP signatures inside and below the dendritic growth layer with W-band doppler radar and in situ snowfall camera. Atmos. Chem. Phys., 25, 14045–14070, https://doi.org/10/g98dzc.\\
43) Scarsi, F. E., A. Battaglia, **M. Maahn**, and S. Lhermitte, 2025: How to reduce sampling errors in spaceborne cloud radar-based snowfall estimates. Cryosphere, 19, 4875–4892, https://doi.org/10/g97wbw.\\
42) **Maherndl, N.**, A. Battaglia, A. Kötsche, and **M. Maahn**, 2025: Riming-dependent snowfall rate and ice water content retrievals for W-band cloud radar. Atmos. Meas. Tech., 18, 3287–3304, https://doi.org/10/g9vgvc.\\
41) Ehrlich, A., and coauthors (including **M. Maahn**, **N. Maherndl**), 2025: A comprehensive in situ and remote sensing data set collected during the HALO–(𝒜𝒞)³ aircraft campaign. Earth Syst. Sci. Data, 17, 1295–1328, https://doi.org/10/g9bghk.\\
D13) //**Maahn, M.**, and **V. Ettrichrätz**, 2025: Video In situ snowfall sensor (VISSS) data for Eriswil (2023-2024). https://doi.org/10.1594/PANGAEA.981222. // \\
D12) //**Maahn, M.**, **N. Maherndl**, and **N. Pfeifer**, 2025: Video In situ snowfall sensor (VISSS) data for Ny-Ålesund (january 2024 - december 2024). https://doi.org/10.1594/PANGAEA.981436. // \\
D11) //**Maahn, M.**, **D. Moisseev**, and **N. Pfeifer**, 2025: Video In situ snowfall sensor (VISSS) data for Hyytiälä (december 2023 - july 2024). https://doi.org/10.1594/PANGAEA.981869. // \\


==2024==

40) **Maherndl, N.**, M. Moser, I. Schirmacher, A. Bansemer, J. Lucke, C. Voigt, and **M. Maahn**, 2024: How does riming influence the observed spatial variability of ice water in mixed-phase clouds? Atmos. Chem. Phys., 24, 13935–13960, https://doi.org/10.5194/10.5194/acp-24-13935-2024.\\
39) Wendisch, M., and coauthors (including **M. Maahn**, **N. Maherndl**), 2024: Overview: quasi-Lagrangian observations of Arctic air mass transformations – introduction and initial results of the HALO–(𝒜𝒞)³ aircraft campaign. Atmospheric Chemistry and Physics, 24, 8865–8892, https://doi.org/10.5194/acp-24-8865-2024.\\
38) Mahecha, M. D., A. Bastos, F. J. Bohn, N. Eisenhauer, H. Feilhauer, T. Hickler, H. Kalesse-Los, M. Migliavacca, F. E. L. Otto, J. Peng, S. Sippel, I. Tegen, A. Weigelt, M. Wendisch, C. Wirth, D. Al-Halbouni, H. Deneke, D. Doktor, S. Dunker, G. Duveiller, A. Ehrlich, A. Foth, A. García-García, C. A. Guerra, C. Guimarães-Steinicke, H. Hartmann, S. Henning, H. Herrmann, P. Hu, C. Ji, T. Kattenborn, N. Kolleck, M. Kretschmer, I. Kühn, M. L. Luttkus, **M. Maahn**, M. Mönks, K. Mora, M. Pöhlker, M. Reichstein, N. Rüger, B. Sánchez-Parra, M. Schäfer, F. Stratmann, M. Tesche, B. Wehner, S. Wieneke, A. J. Winkler, S. Wolf, S. Zaehle, J. Zscheischler, and J. Quaas, 2024: Biodiversity and Climate Extremes: Known Interactions and Research Gaps. Earth’s Future, 12, e2023EF003963, https://doi.org/10.5194/10.1029/2023EF003963.\\
37) Lee, J., P. Seifert, T. Hashino, **M. Maahn**, F. Senf, and O. Knoth, 2024: Simulations of the impact of cloud condensation nuclei and ice-nucleating particles perturbations on the microphysics and radar reflectivity factor of stratiform mixed-phase clouds. Atmos. Chem. Phys., 24, 5737–5756, https://doi.org/10.5194/10.5194/acp-24-5737-2024.\\
36) **Maherndl, N.**, M. Moser, J. Lucke, M. Mech, N. Risse, I. Schirmacher, and **M. Maahn**, 2024: Quantifying riming from airborne data during HALO-(𝒜𝒞)³. Atmos. Meas. Tech., 17, 1475–1495, https://doi.org/10.5194/amt-17-1475-2024.\\
35) **Maahn, M.**, D. Moisseev, **I. Steinke**, **N. Maherndl**, and M. D. Shupe, 2024: Introducing the Video In Situ Snowfall Sensor (VISSS). Atmos. Meas. Tech., 17, 899–919, https://doi.org/10.5194/amt-17-899-2024.\\
D10) //Ehrlich, A., M. Wendisch, S. Crewell, C. Lüpkes, M. Mech, M. Klingebiel, F. Ament, S. Borrmann, H. Dorff, F. Ewald, G. George, I. Gorodetskaya, S. Groß, **M. Maahn**, M. Moser, R. Neggers, D. Ori, F. Pithan, V. Pörtge, J. Röttenbacher, V. Schemann, J. Schneider, C. Voigt, and A. Walbröl, 2024: Collection of flight reports from the HALO-(𝒜𝒞)³ campaign. https://doi.org/10.5281/zenodo.11184578. //\\
D9) //**Maahn, M.**, and **N. Maherndl**, 2024: Video In Situ Snowfall Sensor (VISSS) data for Ny-Ålesund (July 2022 - December 2023). https://doi.org/10.1594/PANGAEA.965766. //\\
D8) //**Maahn, M.**, and S. Wolter, 2024: Hardware design of the Video In Situ Snowfall Sensor v3 (VISSS3). https://doi.org/10.5281/zenodo.10526898. //\\
D7) //**Maahn, M.**, **V. Ettrichraetz**, and **I. Steinke**, 2024: VISSS Raw data from SAIL at Gothic from November 2022 to June 2023, https://doi.org/10.5439/2278627. //\\

==2023==

34) Rizik, A., A. Battaglia, F. Tridon, F. E. Scarsi, A. Kötsche, H. Kalesse-Los, **M. Maahn**, and A. Illingworth, 2023: Impact of Crosstalk on Reflectivity and Doppler Measurements for the WIVERN Polarization Diversity Doppler Radar. IEEE Trans. Geosci. Remote Sens., 61, 1–14, https://doi.org/10.1109/TGRS.2023.3320287. {{ :user:mmaahn:tgrs3320287.pdf |PDF}}\\
33) **Maherndl, N.**, **M. Maahn**, F. Tridon, J. Leinonen, D. Ori, and S. Kneifel, 2023: A riming-dependent parameterization of scattering by snowflakes using the self-similar Rayleigh–Gans approximation. Q.J.R. Meteorol. Soc., https://doi.org/10.1002/qj.4573. \\
32) Wendisch, M., and Coauthors (including **M. Maahn**), 2023: Atmospheric and Surface Processes, and Feedback Mechanisms Determining Arctic Amplification: A Review of First Results and Prospects of the (AC)3 Project. Bull. Amer. Meteor. Soc., 1, https://doi.org/10.1175/BAMS-D-21-0218.1. \\
C5) //**Maahn, M.**, 2023: Video In Situ Snowfall Sensor (VISSS) data processing library  V2023.1.6. https://doi.org/10.5281/zenodo.7650394.  //\\
C4) //**Maahn, M.**, 2023: Video In Situ Snowfall Sensor (VISSS) data acquisition software V0.3.1. https://doi.org/10.5281/zenodo.7640801. // \\
D6) // **Maherndl. N.**, **Maahn, M.**, F. Tridon, J. Leinonen, D. Ori, and S. Kneifel, 2023: Data set of simulated rimed aggregates for “A riming-dependent parameterization of scattering by snowflakes using the self-similar Rayleigh-Gans approximation.” https://doi.org/10.5281/zenodo.7757034. https://zenodo.org/records/7757034. //\\
D5) // **Maahn, M.**, and **N. Maherndl**, 2023: Video In Situ Snowfall Sensor (VISSS) data for Ny-Ålesund (2021-2023). https://doi.org/10.1594/PANGAEA.958537. //\\
D4) // **Maahn, M.**, and D. Moisseev, 2023: Video In Situ Snowfall Sensor (VISSS) data for Hyytiälä (2021-2022). https://doi.org/10.1594/PANGAEA.959046. //\\
D3) //**Maahn, M.**, C. J. Cox, M. R. Gallagher, J. K. Hutchings, M. D. Shupe, and U. Taneil, 2023: Video In Situ Snowfall Sensor (VISSS) data from MOSAiC expedition with POLARSTERN (2019-2020). https://doi.org/10.1594/PANGAEA.960391. //\\
D2) //**Maahn, M.**, R. Haseneder-Lind, and P. Krobot, 2023: Hardware design of the Video In Situ Snowfall Sensor v2 (VISSS2). https://doi.org/10.5281/zenodo.7640821. //\\


==2022==

31) Schimmel, W., H. Kalesse-Los, **M. Maahn**, T. Vogl, A. Foth, P. Saavedra Garfias, and P. Seifert, 2022: Identifying cloud droplets beyond lidar attenuation from vertically pointing cloud radar observations using artificial neural networks. Atmos. Meas. Tech., 15, 5343–5366, https://doi.org/10.5194/amt-15-5343-2022.\\
30) Shupe, M. D., and Coauthors (including **M. Maahn**), 2022: Overview of the MOSAiC expedition—Atmosphere. Elem. Sci. Anth., 10, 00060, https://doi.org/10.1525/elementa.2021.00060.\\
29) Vogl, T., **M. Maahn**, S. Kneifel, W. Schimmel, D. Moisseev, and H. Kalesse-Los, 2022: Using artificial neural networks to predict riming from Doppler cloud radar observations. Atmos. Meas. Tech., 15, 365–381, https://doi.org/10.5194/amt-15-365-2022.\\

==2021==

28) Kulie, M. S., Pettersen, C., Merrelli, A. J., Wagner, T. J., Wood, N. B., Dutter, M., Beachler, D., Kluber, T., Turner, R., Mateling, M., Lenters, J., Blanken, P., **Maahn, M.**, Spence, C., Kneifel, S., Kucera, P. A., Tokay, A., Bliven, L. F., Wolff, D. B., and Petersen, W. A., 2021: Snowfall in the Northern Great Lakes: Lessons Learned from a Multi-Sensor Observatory. Bull. Amer. Meteor. Soc., 1, 1–61, https://doi.org/10.1175/BAMS-D-19-0128.1.\\
27) Luke, E. P., F. Yang, P. Kollias, A. M. Vogelmann, and **M. Maahn**, 2021: New insights into ice multiplication using remote-sensing observations of slightly supercooled mixed-phase clouds in the Arctic. PNAS, 118, https://doi.org/10.1073/pnas.2021387118.\\
26) **Maahn, M.**, T. Goren, M. D. Shupe, and G. de Boer, 2021: Liquid containing clouds at the North Slope of Alaska demonstrate sensitivity to local industrial aerosol emissions. Geophys. Res. Lett., e2021GL094307, https://doi.org/10.1029/2021GL094307.

==2020==

25) **Maahn, M.**, D. D. Turner, U. Löhnert, D. J. Posselt, K. Ebell, G. G. Mace, and J. M. Comstock, 2020: Optimal Estimation Retrievals and Their Uncertainties: What Every Atmospheric Scientist Should Know. Bull. Amer. Meteor. Soc., 101, E1512–E1523, https://doi.org/10.1175/BAMS-D-19-0027.1. **{{ :user:mmaahn:bams_february_2021.pdf |Three page summary of the article}}** \\
24) Matrosov, S. Y., A. V. Ryzhkov, **M. Maahn**, and G. de Boer, 2020: Hydrometeor Shape Variability in Snowfall as Retrieved from Polarimetric Radar Measurements. J. Appl. Meteor. Climatol., 59, 1503–1517, https://doi.org/10.1175/JAMC-D-20-0052.1.\\
23) Mech, M., **M. Maahn**, S. Kneifel, D. Ori, E. Orlandi, P. Kollias, V. Schemann, and S. Crewell, 2020: PAMTRA 1.0: the Passive and Active Microwave radiative TRAnsfer tool for simulating radiometer and radar measurements of the cloudy atmosphere. Geosci. Model Dev., 13, 4229–4251, https://doi.org/10.5194/gmd-13-4229-2020.\\
C3) //**Maahn, M.**, 2020: “pyOptimalEstimation” Package. https://github.com/maahn/pyOptimalEstimation. //\\

==2019==

22) Acquistapace, C., U. Löhnert, **M. Maahn**, and P. Kollias, 2019: A New Criterion to Improve Operational Drizzle Detection with Ground-Based Remote Sensing. J. Atmos. Oceanic Technol., 36, 781–801, https://doi.org/10.1175/JTECH-D-18-0158.1.\\
21) Ghate, V. P., P. Kollias, S. Crewell, A. M. Fridlind, T. Heus, U. Löehnert, **M. Maahn**, G. M. McFarquhar, D. Moisseev, M. Oue, M. Wendisch, and C. Williams, 2019: The Second ARM Training and Science Application Event: Training the Next Generation of Atmospheric Scientists. Bull. Amer. Meteor. Soc., 100, ES5–ES9, https://doi.org/10.1175/BAMS-D-18-0242.1.\\
20) **Maahn, M.**, F. Hoffmann, M. D. Shupe, G. de Boer, S. Y. Matrosov, and E. P. Luke, 2019: Can liquid cloud microphysical processes be used for vertically pointing cloud radar calibration? Atmos. Meas. Tech., 12, 3151–3171, https://doi.org/10.5194/amt-12-3151-2019.\\
19) Matrosov, S. Y., **M. Maahn**, and G. de Boer, 2019: Observational and Modeling Study of Ice Hydrometeor Radar Dual-Wavelength Ratios. J. Appl. Meteor. Climatol., 58, 2005–2017, https://doi.org/10.1175/JAMC-D-19-0018.1.\\
C2) //**Maahn, M.**, and D. Ori, 2019: maahn/pamtra2: calibrationPaper_v1. https://doi.org/10.5281/zenodo.2552448. //\\
D1) //**Maahn, M.**, 2019: MASC Snowparticle Images. https://doi.org/10.5439/1497701. //\\

==2018==

18) de Boer, G., M. Ivey, B. Schmid, D. Lawrence, D. Dexheimer, F. Mei, J. Hubbe, A. Bendure, J. Hardesty, M. D. Shupe, A. McComiskey, H. Telg, C. Schmitt, S. Y. Matrosov, I. Brooks, J. Creamean, A. Solomon, D. D. Turner, C. Williams, **M. Maahn**, B. Argrow, S. Palo, C. N. Long, R.-S. Gao, and J. Mather, 2018: A Bird’s-Eye View: Development of an Operational ARM Unmanned Aerial Capability for Atmospheric Research in Arctic Alaska. Bull. Amer. Meteor. Soc., 99, 1197–1212, https://doi.org/10.1175/BAMS-D-17-0156.1.\\
17) Creamean, J. M., R. M. Kirpes, K. A. Pratt, N. J. Spada, **M. Maahn**, G. de Boer, R. C. Schnell, and S. China, 2018: Marine and terrestrial influences on ice nucleating particles during continuous springtime measurements in an Arctic oilfield location. Atmos. Chem. Phys., 18, 18023–18042, https://doi.org/10.5194/acp-18-18023-2018.\\
16) Creamean, J. M., **M. Maahn**, G. de Boer, A. McComiskey, A. J. Sedlacek, and Y. Feng, 2018: The influence of local oil exploration and regional wildfires on summer 2015 aerosol over the North Slope of Alaska. Atmos. Chem. Phys., 18, 555–570, https://doi.org/10.5194/acp-18-555-2018.\\
15) Solomon, A., G. de Boer, J. M. Creamean, A. McComiskey, M. D. Shupe, **M. Maahn**, and C. Cox, 2018: The relative impact of cloud condensation nuclei and ice nucleating particle concentrations on phase partitioning in Arctic mixed-phase stratocumulus clouds. Atmos. Chem. Phys., 18, 17047–17059, https://doi.org/10.5194/acp-18-17047-2018.\\
14) Williams, C. R., **M. Maahn**, J. C. Hardin, and G. de Boer, 2018: Clutter mitigation, multiple peaks, and high-order spectral moments in 35 GHz vertically pointing radar velocity spectra. Atmos. Meas. Tech., 11, 4963–4980, https://doi.org/10.5194/amt-11-4963-2018.\\

==2017==

13) Acquistapace, C., S. Kneifel, U. Löhnert, P. Kollias, **M. Maahn**, and M. Bauer-Pfundstein, 2017: Optimizing observations of drizzle onset with millimeter-wavelength radars. Atmos. Meas. Tech., 10, 1783–1802, https://doi.org/10.5194/amt-10-1783-2017.\\
12) Bühl, J., S. Alexander, S. Crewell, A. Heymsfield, H. Kalesse, A. Khain, **M. Maahn**, K. Van Tricht, and M. Wendisch, 2017: Remote Sensing. Meteor. Mon., 58, 10.1-10.21, https://doi.org/10.1175/AMSMONOGRAPHS-D-16-0015.1.\\
11) **Maahn, M.**, and U. Löhnert, 2017: Potential of Higher-Order Moments and Slopes of the Radar Doppler Spectrum for Retrieving Microphysical and Kinematic Properties of Arctic Ice Clouds. J. Appl. Meteor. Climatol., 56, 263–282, https://doi.org/10.1175/JAMC-D-16-0020.1.\\
10) **Maahn, M.**, G. de Boer, J. M. Creamean, G. Feingold, G. M. McFarquhar, W. Wu, and F. Mei, 2017: The observed influence of local anthropogenic pollution on northern Alaskan cloud properties. Atmos. Chem. Phys., 17, 14709–14726, https://doi.org/10.5194/acp-17-14709-2017.\\
9) Matrosov, S. Y., C. G. Schmitt, **M. Maahn**, and G. de Boer, 2017: Atmospheric Ice Particle Shape Estimates from Polarimetric Radar Measurements and In Situ Observations. J. Atmos. Oceanic Technol., 34, 2569–2587, https://doi.org/10.1175/JTECH-D-17-0111.1.\\
8) Souverijns, N., A. Gossart, S. Lhermitte, I. V. Gorodetskaya, S. Kneifel, **M. Maahn**, F. L. Bliven, and N. P. M. van Lipzig, 2017: Estimating radar reflectivity - Snowfall rate relationships and their uncertainties over Antarctica by combining disdrometer and radar observations. Atmos. Res., 196, 211–223, https://doi.org/10.1016/j.atmosres.2017.06.001.\\

==2016==

7) Kneifel, S., P. Kollias, A. Battaglia, J. Leinonen, **M. Maahn**, H. Kalesse, and F. Tridon, 2016: First observations of triple-frequency radar Doppler spectra in snowfall: Interpretation and applications. Geophys. Res. Lett., 43, 2225–2233, https://doi.org/10.1002/2015GL067618.\\

==2015==

6) Gorodetskaya, I. V., S. Kneifel, **M. Maahn**, K. Van Tricht, W. Thiery, J. H. Schween, A. Mangold, S. Crewell, and N. P. M. Van Lipzig, 2015: Cloud and precipitation properties from ground-based remote-sensing instruments in East Antarctica. Cryosphere, 9, 285–304, https://doi.org/10.5194/tc-9-285-2015.\\
5) Löhnert, U., J. H. Schween, C. Acquistapace, K. Ebell, M. **Maahn, M.** Barrera-Verdejo, A. Hirsikko, B. Bohn, A. Knaps, E. O’Connor, C. Simmer, A. Wahner, and S. Crewell, 2015: JOYCE: Jülich Observatory for Cloud Evolution. Bull. Amer. Meteor. Soc., 96, 1157–1174, https://doi.org/10.1175/BAMS-D-14-00105.1.\\
4) **Maahn, M.**, U. Löhnert, P. Kollias, R. C. Jackson, and G. M. McFarquhar, 2015: Developing and Evaluating Ice Cloud Parameterizations for Forward Modeling of Radar Moments Using in situ Aircraft Observations. J. Atmos. Oceanic Technol., 32, 880–903, https://doi.org/10.1175/JTECH-D-14-00112.1.\\

==2011 - 2014==

3) **Maahn, M.**, C. Burgard, S. Crewell, I. V. Gorodetskaya, S. Kneifel, S. Lhermitte, K. Van Tricht, and N. P. M. van Lipzig, 2014: How does the spaceborne radar blind zone affect derived surface snowfall statistics in polar regions? J. Geophys. Res. Atmos., 119, 13604–13620, https://doi.org/10.1002/2014JD022079.\\
2) **Maahn, M.**, and P. Kollias, 2012: Improved Micro Rain Radar snow measurements using Doppler spectra post-processing. Atmos. Meas. Tech., 5, 2661–2673, https://doi.org/10.5194/amt-5-2661-2012.\\
C1) //**Maahn, M.**, 2012: IMProToo - Improved Mrr Processing Tool. https://github.com/maahn/IMProToo. //\\
1) Kneifel, S., **M. Maahn**, G. Peters, and C. Simmer, 2011: Observation of snowfall with a low-power FM-CW K-band radar (Micro Rain Radar). Meteorol. Atmos. Phys., 113, 75–87, https://doi.org/10.1007/s00703-011-0142-z.\\

===== Invited Talks=====
  * Combining in situ and remote sensing observations for studying precipitation formation, Colloquium, Kyungpook National University, Korea, 2025
  * What Every Atmospheric Scientist Should Know About Inverse Modelling, Seminar in Microwave Physics, University of Bern, 2021
  * Spatial variability of cloud properties at the North Slope of Alaska. Colloquium, Leipzig University, 2019.
  * Spatial variability of cloud properties at the North Slope of Alaska. Colloquium, Karlsruhe Institute of Technology, 2019
  * Investigating the impact of anthropogenic pollution on cloud properties derived from ground based remote sensors at the North Slope of Alaska. European Geosciences Union General Assembly, Vienna, Austria, 2018.
  * Anthropogenic pollution and cloud properties at the North Slope of Alaska. AOS Colloquium, University of Wisconsin Madison, 2018.
  * Using vertically pointing Doppler radar to study clouds (and precipitation). Seminar talk at Cooperative Institute for Research in Environmental Sciences, Boulder, CO, USA, 2015.