Sciences and Exploration Directorate

George Tselioudis


George Tselioudis's Contact Card & Information.
Phone: 212.678.5565
Org Code: 611
Mail Code 611
New York, NY 10025


Research Physical Scientist

NASA Goddard Institute for Space Studies - New York

2013 - Present


Research Scientist

Department of Applied Physics, Columbia University - NASA Goddard Institute for Space Studies, New York

1999 - 2013


Associate Research Scientist

Department of Applied Physics, Columbia University - NASA Goddard Institute for Space Studies, New York

1994 - 1999


Postdoctoral Fellow

Columbia University - NASA Goddard Institute for Space Studies, New York

1992 - 1994


Teaching Experience

  • 2014-present, Adjunct Professor, Columbia University Department of Applied Physics and Applied Math
  • 1995-1997, Adjunct Associate Professor, City University of New York
  • 1993-2002, Instructor, NASA/GISS Institute on Climate and Planets
  • 1991, Instructor, Barnard College STEP (Science and Technology Education) Program


  • Ph.D. Columbia University, 1992 — Atmospheric Sciences-Clouds and Radiation, Climate Change
  • M.S. University of Miami, 1987 — Meteorology-Tropical Meteorology, Air-Sea Interaction
  • B.S. Aristotle University of Thessaloniki, Greece, 1983 — Physics

Professional Service

  • Coordinator, WGCM Cloud Feedback Model Intercomparison Project (CFMIP)
  • Member, Executive Board, Infrastructure for the European Network for Earth System Modeling (IS-ENES)
  • Author, Intergovernmental Panel for Climate Change (IPCC) Fourth Assessment Report
  • Member, EU Cloud Intercomparison, Process Study and Evaluation Project (EUCLIPSE) Science Team
  • Chair, GEWEX Cloud Systems Study Working Group on Midlatitude Layered Clouds
  • Member, GEWEX Cloud Systems Study Science Steering Group
  • Member, Department of Energy Atmospheric Radiation Measuring Program Science Team
  • Member, NASA Modeling and Analysis Project Science Team
  • US National Reviewer, IPCC Third Assessment Report
  • Reviewer, NOAA, NASA, NSF, and EU proposals
  • Reviewer, Nature, Journal of Geophysical Research-Atmospheres, Journal of Climate, Journal of the Atmospheric Sciences, Monthly Weather Review, Geophysical Resaarch Letters


  • 2004 American Geophysical Union (AGU) Charles Falkenberg Award
  • 2001 NASA/GISS Popular Science Article Award
  • 1993 NASA/GISS Publication of the Year Award



Constraining the climate sensitivity of the GISS and GMAO models using process based eevaluation methods - NASA Modeling and Analysis (MAP) Program - Awarded:

Dates:  - 


Advancing clouds lifecycle representation in numerical models using innovative analysis tools and models that bridge ARM observations and models over a breadth of scales - DOE Atmospheric Science Research (ARM) Program - Awarded:

Dates:  - 



2024. "Contributions From Cloud Morphological Changes to the Interannual Shortwave Cloud Feedback Based on MODIS and ISCCP Satellite Observations." Journal of Geophysical Research: Atmospheres 129 (8): [10.1029/2023jd040540] [Journal Article/Letter]

2023. "On the impact of a dry intrusion driving cloud-regime transitions in a midlatitude cold-air outbreak." Journal of the Atmospheric Sciences [10.1175/jas-d-23-0040.1] [Journal Article/Letter]

2023. "Global warming in the pipeline." Oxford Open Climate Change 3 (1): [10.1093/oxfclm/kgad008] [Journal Article/Letter]

2022. "Use of Satellite Observations in Climate Model Evaluation of Clouds: A Time History Based on the NASA/GISS MODEL." Studies of Cloud, Convection and Precipitation Processes Using Satellite Observations 247-262 [10.1142/9789811256912_0013] [Article in Book]

2022. "Studies of Cloud, Convection and Precipitation Processes Using Satellite Observations." Lectures in Climate Change [10.1142/12862] [Book]

2022. "Detailing cloud property feedbacks with a regime-based decomposition." Climate Dynamics [10.1007/s00382-022-06488-7] [Journal Article/Letter]

2022. "Model evaluation of short-lived climate forcers for the Arctic Monitoring and Assessment Programme: a multi-species, multi-model study." Atmospheric Chemistry and Physics 22 (9): 5775-5828 [10.5194/acp-22-5775-2022] [Journal Article/Letter]

2022. "Future Climate Change under SSP Emission Scenarios with GISS‐E2.1." Journal of Advances in Modeling Earth Systems [10.1029/2021ms002871] [Journal Article/Letter]

2021. "Improved representation of atmospheric dynamics in CMIP6 models removes climate sensitivity dependence on Hadley cell climatological extent." Atmospheric Science Letters [10.1002/asl.1073] [Journal Article/Letter]

2021. "Evaluation of Clouds, Radiation, and Precipitation in CMIP6 Models Using Global Weather States Derived from ISCCP-H Cloud Property Data." Journal of Climate 34 (17): 7311–7324 [10.1175/jcli-d-21-0076.1] [Journal Article/Letter]

2021. "An Overview of Atmospheric Features Over the Western North Atlantic Ocean and North American East Coast—Part 2: Circulation, Boundary Layer, and Clouds." Journal of Geophysical Research: Atmospheres 126 (6): [10.1029/2020jd033423] [Journal Article/Letter]

2021. "CMIP6 Historical Simulations (1850‐2014) with GISS‐E2.1." Journal of Advances in Modeling Earth Systems 13 e2019MS002034 [10.1029/2019ms002034] [Journal Article/Letter]

2020. "Midlatitude Cloud Systems." Clouds and Climate 279-296 [10.1017/9781107447738.010] [Article in Book]

2020. "GISS‐E2.1: Configurations and Climatology." Journal of Advances in Modeling Earth Systems 12 (8): [10.1029/2019ms002025] [Journal Article/Letter]

2017. "Use of Cloud Radar Doppler Spectra to Evaluate Stratocumulus Drizzle Size Distributions in Large-Eddy Simulations with Size-Resolved Microphysics." Journal of Applied Meteorology and Climatology 56 (12): 3263-3283 [10.1175/jamc-d-17-0100.1] [Journal Article/Letter]

2017. "CMIP5 models' shortwave cloud radiative response and climate sensitivity linked to the climatological Hadley cell extent." Geophysical Research Letters 44 (11): 5739-5748 [10.1002/2017gl073151] [Journal Article/Letter]

2016. "The ‘Storm Curtain’ Effect: Poleward Shift of Clouds, Their Radiative Effects, and the Role of Midlatitude Storms." Springer Atmospheric Sciences 725-731 [10.1007/978-3-319-35095-0_104] [Article in Book]

2015. "Increases in tropical rainfall driven by changes in frequency of organized deep convection." Nature 519 451-454 [10.1038/nature14339] [Journal Article/Letter]

2015. "Clouds, aerosol, and precipitation in the marine boundary layer: An ARM Mobile Facility deployment." Bull. Amer. Meteorol. Soc. 96 (3): 419-440 [doi:10.1175/BAMS-D-13-00180.1] [Journal Article/Letter]

2013. "The ozone hole indirect effect: Cloud-radiative anomalies accompanying the poleward shift of the eddy-driven jet in the Southern Hemisphere." Geophys. Res. Lett. 40 (14): 3688-3692 [10.1002/grl.50675] [Journal Article/Letter]

2013. "Global Weather States and Their Properties from Passive and Active Satellite Cloud Retrievals." J. Climate 26 (19): 7734-7746 [10.1175/JCLI-D-13-00024.1] [Journal Article/Letter]

2012. "Does dynamical downscaling introduce novel information in climate model simulations of precipitation change over a complex topography region?." Int. J. Climatol. 32 (10): 1572-1578 [10.1002/joc.2360] [Journal Article/Letter]

2012. "Atmospheric forcing of the Eastern Mediterranean Transient by midlatitude cyclones." Geophysical Research Letters 39 (3): L03703 [10.1029/2011GL050298] [Journal Article/Letter]

2012. "Changes in extratropical storm track cloudiness 1983–2008: observational support for a poleward shift." Clim Dyn 38 (9-10): 2037-2053 [10.1007/s00382-011-1065-6] [Journal Article/Letter]

2011. "Time Scales of Variability of the Tropical Atmosphere Derived from Cloud-Defined Weather States." J Climate 24 (3): 602-608 [10.1175/2010JCLI3574.1] [Journal Article/Letter]

2011. "Long term precipitation trends and variability within the Mediterranean region." Natural Hazards and Earth System Science 11 (12): 3235-3250 [10.5194/nhess-11-3235-2011] [Journal Article/Letter]

2011. "Major Characteristics of Southern Ocean Cloud Regimes and Their Effects on the Energy Budget." J. Climate 24 (19): 5061-5080 [10.1175/2011JCLI4052.1] [Journal Article/Letter]

2010. "Evaporation–Precipitation Variability over the Mediterranean and the Black Seas from Satellite and Reanalysis Estimates." J. Climate 23 (19): 5268-5287 [10.1175/2010JCLI3525.1] [Journal Article/Letter]

2010. "Decadal changes in tropical convection suggest effects on stratospheric water vapor." Geophys Res Lett 37 (14): L14806 [10.1029/2010GL044092] [Journal Article/Letter]

2009. "Storms, climate change, and the US economy: A national analysis." Reg Sector Econ Stud 9 (1): 1 [Journal Article/Letter]

2009. "Solar dimming and brightening over Thessaloniki, Greece, and Beijing, China." Tellus B 61 (4): 657-665 [10.1111/j.1600-0889.2009.00425.x] [Journal Article/Letter]

2007. "Search for Man-Made Cirrus Contrails over Southeast Asia." Terrestrial, Atmospheric and Oceanic Sciences 18 (3): 459 [10.3319/TAO.2007.18.3.459(EA)] [Journal Article/Letter]

2007. "GCM intercomparison of global cloud regimes: present-day evaluation and climate change response." Clim Dyn 29 (2-3): 231-250 [10.1007/s00382-007-0232-2] [Journal Article/Letter]

2007. "Evaluation of ECMWF cloud type simulations at the ARM Southern Great Plains site using a new cloud type climatology." Geophys Res Lett 34 (3): L03803 [10.1029/2006GL027314] [Journal Article/Letter]

2007. "Cloud climatology at the Southern Great Plains and the layer structure, drizzle, and atmospheric modes of continental stratus." J. Geophys. Res. 112 (D9): D09116 [10.1029/2006JD007307] [Journal Article/Letter]

2007. "A study on natural and manmade global interannual fluctuations of cirrus cloud cover for the period 1984-2004." Atmos Chem Phys 7 2631-2642 [10.5194/acp-7-2631-2007] [Journal Article/Letter]

2006. "Climate feedback implied by observed radiation and precipitation changes with midlatitude storm strength and frequency." Geophysical Research Letters 33 (2): L02704 [10.1029/2005GL024513] [Journal Article/Letter]

2006. "How Well Do We Understand and Evaluate Climate Change Feedback Processes?." J. Climate 19 (15): 3445-3482 [10.1175/JCLI3819.1] [Journal Article/Letter]

2005. "Tropical climate described as a distribution of weather states indicated by distinct mesoscale cloud property mixtures." Geophysical Research Letters 32 (21): L21812 [10.1029/2005GL024584] [Journal Article/Letter]

2005. "The Radiative, Cloud, and Thermodynamic Properties of the Major Tropical Western Pacific Cloud Regimes." J Climate 18 (8): 1203-1215 [10.1175/JCLI3326.1] [Journal Article/Letter]

2004. "The Data Integration for Model Evaluation Web Site: A One-Stop Shop for Model Evaluation." Bulletin of the American Meteorological Society 85 (6): 830-835 [10.1175/BAMS-85-6-830] [Journal Article/Letter]

2003. "Evidence of impact of aviation on cirrus cloud formation." Atmos. Chem. Phys. 3 (5): 1633-1644 [10.5194/acp-3-1633-2003] [Journal Article/Letter]

2003. "Confronting Models with Data: The GEWEX Cloud Systems Study." Bull Amer Meteorol Soc 84 (4): 455-469 [10.1175/BAMS-84-4-455] [Journal Article/Letter]

2003. "Objective identification of cloud regimes in the Tropical Western Pacific." Geophys Res Lett 30 (21): 2082 [10.1029/2003GL018367] [Journal Article/Letter]

2002. "Evaluation of midlatitude cloud properties in a weather and a climate model: Dependence on dynamic regime and spatial resolution." J Geophys Res 107 (D24): 4781 [10.1029/2002JD002259] [Journal Article/Letter]

2002. "GCM simulations of the aerosol indirect effect: Sensitivity to cloud parameterization and aerosol burden." J Atmos Sci 59 692-713. [Journal Article/Letter]

2000. "Cloud and radiation variations associated with northern midlatitude low and high sea level pressure regimes." J Climate 13 (2): 312-327 [10.1175/1520-0442(2000)013<0312:CARVAW>2.0.CO;2] [Journal Article/Letter]

2000. "Simulations of a cold front by cloud-resolving, limited-area, and large-scale models, and a model evaluation using in situ and satellite observations." M Weather Rev 128 3218-3235. [Journal Article/Letter]

2000. "Why is the cloud albedo - Particle size relationship different in optically thick and optically thin clouds?." Geophys Res Lett 27 (8): 1099-1102 [10.1029/1999GL011098] [Journal Article/Letter]

1999. "An evolutionary system for recognition and tracking of synoptic-scale storm systems." Pattern Recogn Lett 20 (11-13): 1389-1396 [10.1016/S0167-8655(99)00110-5] [Journal Article/Letter]

1998. "Temperature dependence of low cloud optical thickness in the GISS GCM: Contributing mechanisms and climate implications." J Climate 11 3268-3281 [Journal Article/Letter]

1997. "Comparison of genetic algorithm systems with neural network and statistical techniques for analysis of cloud structures in midlatitude storm systems." Pattern Recogn Lett 18 (11-13): 1347-1351 [10.1016/S0167-8655(97)00115-3] [Journal Article/Letter]

1994. "Global, multiyear variations of optical thickness with temperature in low and cirrus clouds." Geophys Res Lett 21 (20): 2211-2214 [10.1029/94GL02004] [Journal Article/Letter]

1993. "Potential effects of cloud optical thickness on climate warming." Nature 366 (6456): 670-672 [10.1038/366670a0] [Journal Article/Letter]

1992. "Global patterns of cloud optical thickness variation with temperature." J Climate 5 1484-1495 [Journal Article/Letter]


2015. "The GEWEX Process Evaluation Study: GEWEX-PROES." GEWEX News 27 (4): 4-5 [Newsletter]