General Lab Information

Pavlos Kollias

Joint Appointment, Environmental and Climate Sciences Department

Pavlos Kollias

Brookhaven National Laboratory

Environmental and Climate Sciences Department
Bldg. 490D
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-5280
pkollias@bnl.gov

Kollias is a Professor at the School of Marine and Atmospheric Sciences at Stony Brook University – State University of New York and has a joint appointment with the Department of Environmental and Climate Sciences at Brookhaven National Laboratory. His research focuses on the understanding of the microphysical, dynamical and radiative processes that act at the cloud- and meso-scale and their accurate representation in numerical models. He is also interested in radar technology and the development and application of novel phased-array and spaceborne radars in weather and climate research. Kollias is an international leader in the application of radars for cloud and precipitation research from ground-based and space-based platforms. Kollias has published over 140 peer-reviewed scientific articles in the areas of millimeter wavelength radar research, radar technology, signal processing and cloud and precipitation dynamics and microphysics.

Pavlos Kollias is the Director of the Center for Multiscale Applied Sensing (CMAS) at Brookhaven National Laboratory (www.bnl.gov/cmas). He is a member of the Mission Advisory Group and algorithm development team of the European Space Agency Earth Clouds Aerosols Radiation Experiment (EARTHCARE) Explorer Mission. He has served as a member at the National Science Foundation Engineering Research Center for the Collaborative Adaptive Sensing of the Atmosphere. Kollias also served for three years (2007-2009) as Associate Chief Scientist for the US DOE Atmospheric Radiation Measurements (ARM) program. He has served as the Chair of the American Meteorological Society (AMS) Committee on Radar Meteorology and has organized and chaired numerous sessions in international conferences. Kollias has also organized and participated as guest lecturer in several short courses in Europe, North America and Asia on the use of radars in atmospheric research.

Expertise | Research | Education | Appointments | Publications | Awards

Expertise

  • Cloud and Precipitation microphysics and dynamics
  • Boundary layer turbulence
  • Radar technology and meteorology
  • Instrumentation

Research Activities

  • 2016-present Professor, Stony Brook University, Stony Brook NY
  • 2016-present Atmospheric Scientist, Brookhaven National Laboratory, Upton NY
  • 2016-present International Faculty, University of Cologne, Cologne Germany
  • 2012-2016 Associate Professor and Canada Research Chair, McGill University, Montreal Canada
  • 2007-2012 Assistant Professor and Canada Research Chair, McGill University, Montreal Canada
  • 2005-2007 Associate Scientist, Brookhaven National Laboratory, Upton NY
  • 2004-2005 Assistant Scientist, University of Miami, Miami, FL
  • 2003-2004 Visiting Fellow Scientist, University of Colorado, Boulder, CO
  • 2002-2003 Assistant Scientist, University of Miami, Miami, FL
  • 2001-2002 Postdoctoral Associate, University of Miami, Miami, FL

Education

  • Ph.D. in Meteorology, University of Miami, 2000.
  • M.S. in Atmospheric Science, The University of Athens, Greece, 1996.
  • B.S. in Physics, The University of Athens, Greece, 1994.

Professional Appointments

  • Director, Center for Multiscale Applied Sensing, Brookhaven National Laboratory, 2017-present
  • Member, National Offshore Wind R&D Consortium Advisory Group, 2019-present
  • Observer, Mission Advisory Group, Phase D/E1, ESA EarthCARE mission, 2017-present
  • Associate Editor, AGU Journal of Geophysical Research – Atmospheres, 2012-present
  • Associate Editor, EGU Atmospheric Measurements Techniques Journal, 2019-present
  • Adjunct Researcher, National Observatory of Athens, Greece, 2018 - present
  • Adjunct Professor, McGill University, 2016-present
  • Adjunct Associate Professor, University of Miami, 2011-2017
  • Member, BNL/ECS Department Science Advisory Committee, 2017-2018
  • Member, Mission Advisory Group, Phase C/D, ESA EarthCARE mission, 2012-2017
  • Leader, Radar Science Group, DOE Atmospheric Systems Research program 2012-2018
  • Member, DOE ARM User Executive Committee, 2015-2018

Selected Publications

  • Lamer K, Oue M, Battaglia A, Roy RJ, Cooper KB, Dhillon R, Kollias P (2021) Multifrequency radar observations of clouds and precipitation including the G-band. Atmospheric Measurement Techniques 14:3615–3629. doi: 10.5194/amt-14-3615-2021
  • Siebert H, Szodry K-E, Egerer U, Wehner B, Henning S, Chevalier K, Lückerath J, Welz O, Weinhold K, Lauermann F, Gottschalk M, Ehrlich A, Wendisch M, Fialho P, Roberts G, Allwayin N, Schum S, Shaw RA, Mazzoleni C, Mazzoleni L, Nowak JL, Malinowski SP, Karpinska K, Kumala W, Czyzewska D, Luke EP, Kollias P, Wood R, Mellado JP (2021) Observations of Aerosol, Cloud, Turbulence, and Radiation Properties at the Top of the Marine Boundary Layer over the Eastern North Atlantic Ocean: The ACORES Campaign. Bulletin of the American Meteorological Society 102:E123–E147. doi: 10.1175/bams-d-19-0191.1
  • Zhu Z, Kollias P, Yang F, Luke E (2021) On the Estimation of In-Cloud Vertical Air Motion Using Radar Doppler Spectra. Geophysical Research Letters. doi: 10.1029/2020gl090682
  • Kollias P, Bharadwaj N, Clothiaux EE, Lamer K, Oue M, Hardin J, Isom B, Lindenmaier I, Matthews A, Luke EP, Giangrande SE, Johnson K, Collis S, Comstock J, Mather JH (2020) The ARM Radar Network: At the Leading Edge of Cloud and Precipitation Observations. Bulletin of the American Meteorological Society 101:E588–E607. doi: 10.1175/bams-d-18-0288.1
  • Battaglia A, Kollias P, Dhillon R, Roy R, Tanelli S, Lamer K, Grecu M, Lebsock M, Watters D, Mroz K, Heymsfield G, Li L, Furukawa K (2020) Spaceborne Cloud and Precipitation Radars: Status, Challenges, and Ways Forward. Reviews of Geophysics. doi: 10.1029/2019rg000686
  • Lamer K, Kollias P, Battaglia A, Preval S (2020) Mind-the-gap part I: Accurately locating warm marine boundary layer clouds and precipitation using spaceborne radars. doi: 10.5194/amt-2019-473
  • Oue M, Tatarevic A, Kollias P, Wang D, Yu K, Vogelmann AM (2019) The Cloud Resolving Model Radar Simulator (CR-SIM) Version 3.2:Description and Applications of a Virtual Observatory. doi: 10.5194/gmd-2019-207
  • Kumjian MR, Bowley KA, Markowski PM, Lombardo K, Lebo ZJ, Kollias P (2020) Snowflake Selfies: A Low-Cost, High-Impact Approach toward Student Engagement in Scientific Research (with Their Smartphones). Bulletin of the American Meteorological Society 101:E917–E935. doi: 10.1175/bams-d-19-0096.1
  • Jacob M, Kollias P, Ament F, Schemann V, Crewell S (2020) Multilayer cloud conditions in trade wind shallow cumulus – confronting two ICON model derivatives with airborne observations. Geoscientific Model Development 13:5757–5777. doi: 10.5194/gmd-13-5757-2020
  • Siebert H, Szodry K-E, Egerer U, Wehner B, Henning S, Chevalier K, Lückerath J, Welz O, Weinhold K, Lauermann F, Gottschalk M, Ehrlich A, Wendisch M, Fialho P, Roberts G, Allwayin N, Schum S, Shaw RA, Mazzoleni C, Mazzoleni L, Nowak JL, Malinowski SP, Karpinska K, Kumala W, Czyzewska D, Luke EP, Kollias P, Wood R, Mellado JP (2021) Observations of Aerosol, Cloud, Turbulence, and Radiation Properties at the Top of the Marine Boundary Layer over the Eastern North Atlantic Ocean: The ACORES Campaign. Bulletin of the American Meteorological Society 102:E123–E147. doi: 10.1175/bams-d-19-0191.1
  • Kumjian MR, Tobin DM, Oue M, Kollias P (2020) Microphysical Insights into Ice Pellet Formation Revealed by Fully Polarimetric Ka-Band Doppler Radar. Journal of Applied Meteorology and Climatology 59:1557–1580. doi: 10.1175/jamc-d-20-0054.1
  • Yang F, McGraw R, Luke EP, Zhang D, Kollias P, Vogelmann AM (2019) A new approach to estimate supersaturation fluctuations in stratocumulus cloud using ground-based remote-sensing measurements. Atmospheric Measurement Techniques 12:5817–5828. doi: 10.5194/amt-12-5817-2019
  • Zhang D, Vogelmann A, Kollias P, Luke E, Yang F, Lubin D, Wang Z (2019) Comparison of Antarctic and Arctic Single-Layer Stratiform Mixed-Phase Cloud Properties Using Ground-Based Remote Sensing Measurements. Journal of Geophysical Research: Atmospheres 124:10186–10204. doi: 10.1029/2019jd030673
  • Zhu Z, Lamer K, Kollias P, Clothiaux EE (2019) The Vertical Structure of Liquid Water Content in Shallow Clouds as Retrieved From Dual-Wavelength Radar Observations. Journal of Geophysical Research: Atmospheres 124:14184–14197. doi: 10.1029/2019jd031188
  • Acquistapace C, Löhnert U, Maahn M, Kollias P (2019) A New Criterion to Improve Operational Drizzle Detection with Ground-Based Remote Sensing. Journal of Atmospheric and Oceanic Technology 36:781–801. doi: 10.1175/jtech-d-18-0158.1
  • Kollias P, Puigdomènech Treserras B, Protat A (2019) Calibration of the 2007–2017 record of ARM Cloud Radar Observations using CloudSat. doi: 10.5194/amt-2019-34
  • Battaglia A, Kollias P (2019) Evaluation of differential absorption radars in the 183 GHz band for profiling water vapour in ice clouds. Atmospheric Measurement Techniques 12:3335–3349. doi: 10.5194/amt-12-3335-2019
  • Oue M, Kollias P, Shapiro A, Tatarevic A, Matsui T (2019) Investigation of observational error sources in multi-Doppler-radar three-dimensional variational vertical air motion retrievals. Atmospheric Measurement Techniques 12:1999–2018. doi: 10.5194/amt-12-1999-2019
  • Lamer K, Puigdomènech Treserras B, Zhu Z, Isom B, Bharadwaj N, Kollias P (2019) Characterization of Shallow Oceanic Precipitation using Profiling and Scanning Radar Observations at the Eastern North Atlantic ARM Observatory. doi: 10.5194/amt-2019-160
  • Drueke S, Kirshbaum DJ, Kollias P (2019) Evaluation of Shallow-Cumulus Entrainment Rate Retrievals Using Large-Eddy Simulation. Journal of Geophysical Research: Atmospheres 124:9624–9643. doi: 10.1029/2019jd030889
  • Mech M, Kliesch L-L, Anhäuser A, Rose T, Kollias P, Crewell S (2019) Microwave Radar/radiometer for Arctic Clouds MiRAC: First insights from the ACLOUD campaign. doi: 10.5194/amt-2019-151
  • Oh S, Kollias P, Lee J, Lee S, Lee YH, Jeong J (2019) Rain-rate estimation algorithm using signal attenuation of Ka-band cloud radar. Meteorological Applications. doi: 10.1002/met.1825
  • Pfitzenmaier L, Battaglia A, Kollias P (2019) The Impact of the Radar-Sampling Volume on Multiwavelength Spaceborne Radar Measurements Using Airborne Radar Observations. Remote Sensing 11:2263. doi: 10.3390/rs11192263
  • Endo S, Zhang D, Vogelmann AM, Kollias P, Lamer K, Oue M, Xiao H, Gustafson WI, Romps DM (2019) Reconciling Differences Between Large-Eddy Simulations and Doppler Lidar Observations of Continental Shallow Cumulus Cloud-Base Vertical Velocity. Geophysical Research Letters 46:11539–11547. doi: 10.1029/2019gl084893
  • Grosvenor DP, Sourdeval O, Zuidema P, Ackerman A, Alexandrov MD, Bennartz R, Boers R, Cairns B, Chiu JC, Christensen M, Deneke H, Diamond M, Feingold G, Fridlind A, Hünerbein A, Knist C, Kollias P, Marshak A, McCoy D, Merk D, Painemal D, Rausch J, Rosenfeld D, Russchenberg H, Seifert P, Sinclair K, Stier P, van Diedenhoven B, Wendisch M, Werner F, Wood R, Zhang Z, Quaas J (2018) Remote Sensing of Droplet Number Concentration in Warm Clouds: A Review of the Current State of Knowledge and Perspectives. Reviews of Geophysics 56:409–453. doi: 10.1029/2017rg000593
  • Oue M, Kollias P, Ryzhkov A, Luke EP (2018) Toward Exploring the Synergy Between Cloud Radar Polarimetry and Doppler Spectral Analysis in Deep Cold Precipitating Systems in the Arctic. Journal of Geophysical Research: Atmospheres 123:2797–2815. doi: 10.1002/2017jd027717
  • Yang F, Luke EP, Kollias P, Kostinski AB, Vogelmann AM (2018) Scaling of Drizzle Virga Depth With Cloud Thickness for Marine Stratocumulus Clouds. Geophysical Research Letters 45:3746–3753. doi: 10.1029/2018gl077145
  • Yang F, Kollias P, Shaw RA, Vogelmann AM (2018) Cloud droplet size distribution broadening during diffusional growth: ripening amplified by deactivation and reactivation. Atmospheric Chemistry and Physics 18:7313–7328. doi: 10.5194/acp-18-7313-2018
  • Zhang D, Wang Z, Kollias P, Vogelmann AM, Yang K, Luo T (2018) Ice particle production in mid-level stratiform mixed-phase clouds observed with collocated A-Train measurements. Atmospheric Chemistry and Physics 18:4317–4327. doi: 10.5194/acp-18-4317-2018
  • Zhang Y, Xie S, Klein SA, Marchand R, Kollias P, Clothiaux EE, Lin W, Johnson K, Swales D, Bodas-Salcedo A, Tang S, Haynes JM, Collis S, Jensen M, Bharadwaj N, Hardin J, Isom B (2018) The ARM Cloud Radar Simulator for Global Climate Models: Bridging Field Data and Climate Models. Bulletin of the American Meteorological Society 99:21–26. doi: 10.1175/bams-d-16-0258.1
  • Zhou X, Ackerman AS, Fridlind AM, Kollias P (2018) Simulation of Mesoscale Cellular Convection in Marine Stratocumulus. Part I: Drizzling Conditions. Journal of the Atmospheric Sciences 75:257–274. doi: 10.1175/jas-d-17-0070.1
  • Borque P, Luke EP, Kollias P, Yang F (2018) Relationship between Turbulence and Drizzle in Continental and Marine Low Stratiform Clouds. Journal of the Atmospheric Sciences 75:4139–4148. doi: 10.1175/jas-d-18-0060.1
  • Chen Y -S., Verlinde J, Clothiaux EE, Ackerman AS, Fridlind AM, Chamecki M, Kollias P, Kirkpatrick MP, Chen B -C., Yu G, Avramov A (2018) On the Forward Modeling of Radar Doppler Spectrum Width From LES: Implications for Model Evaluation. Journal of Geophysical Research: Atmospheres 123:7444–7461. doi: 10.1029/2017jd028104
  • Illingworth AJ, Battaglia A, Bradford J, Forsythe M, Joe P, Kollias P, Lean K, Lori M, Mahfouf J-F, Melo S, Midthassel R, Munro Y, Nicol J, Potthast R, Rennie M, Stein THM, Tanelli S, Tridon F, Walden CJ, Wolde M (2018) WIVERN: A New Satellite Concept to Provide Global In-Cloud Winds, Precipitation, and Cloud Properties. Bulletin of the American Meteorological Society 99:1669–1687. doi: 10.1175/bams-d-16-0047.1
  • Kollias P, Battaglia A, Tridon F, Tatarevic A, Pfitzenmaier L, Lamer K (2018) The EarthCARE cloud profiling radar (CPR) doppler measurements in deep convection: challenges, post-processing, and science applications. Remote Sensing of the Atmosphere, Clouds, and Precipitation VII. doi: 10.1117/12.2324321
  • Kollias P, McLaughlin DJ, Frasier S, Oue M, Luke E, Sneddon A (2018) Advances and applications in low-power phased array X-band weather radars. 2018 IEEE Radar Conference (RadarConf18). doi: 10.1109/radar.2018.8378762
  • Lamer K, Fridlind AM, Ackerman AS, Kollias P, Clothiaux EE, Kelley M (2018) (GO)2-SIM: a GCM-oriented ground-observation forward-simulator framework for objective evaluation of cloud and precipitation phase. Geoscientific Model Development 11:4195–4214. doi: 10.5194/gmd-11-4195-2018
  • Zheng G, Wang Y, Aiken AC, Gallo F, Jensen MP, Kollias P, Kuang C, Luke E, Springston S, Uin J, Wood R, Wang J (2018) Marine boundary layer aerosol in the eastern North Atlantic: seasonal variations and key controlling processes. Atmospheric Chemistry and Physics 18:17615–17635. doi: 10.5194/acp-18-17615-2018

Awards & Recognition

  • 2015: NASA Group Achievement Award “For exceeding all expectations for GPM operations, data processing, algorithm performance, science impact, and education and public outreach within one year after launch”.
  • 2013-2014: Humboldt Research Fellowship for experienced researchers, Germany
  • 2012-2017: Canada Research Chair in Radar Applications in Weather and Climate
    http://www.chairs-chaires.gc.ca/chairholders-titulaires/profile-eng.aspx?profileID=2210
  • 2007-2012: Canada Research Chair in Radar Applications in Weather and Climate
  • 2003-2004: Visiting Scientist Fellowship, Cooperative Institute for Research in Environmental Sciences, University of Colorado
  • 2003: NASA Group Achievement Award “for the Cirrus Regional Study of Tropical Anvils and Cirrus Layers – Florida Area Cirrus Experiment (CRYSTAL-FACE)
Pavlos Kollias

Brookhaven National Laboratory

Environmental and Climate Sciences Department
Bldg. 490D
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-5280
pkollias@bnl.gov

Pavlos's Links