1996 - Ph.D. in Atmospheric and Oceanic Sciences, McGill University, Montreal, Canada, Dissertation: "Reflection of solar radiation by inhomogeneous clouds"
1989 - M.Sc. equivalent degree in Meteorology, Eotvos Lorand University, Budapest, Hungary, Thesis: "The adaptation of a spectral global circulation model"
Tamas Varnai
(RESEARCH PROFESSOR)
| Email: | tamas.varnai-1@nasa.gov |
| Phone: | 301.614.6408 |
| Org Code: | 613 |
| Address: |
NASA/GSFC Mail Code 613 Greenbelt, MD 20771 |
| Employer: | UNIVERSITY OF MARYLAND BALTIMORE CO |
Education
Professional Service
2019 - present: Member of the editorial board for the journal Remote Sensing
Publications
Refereed
2024. "Considering the Effects of Horizontal Heterogeneities in Satellite-Based Large-Scale Statistics of Cloud Optical Properties.", Remote Sensing, 16 (18): 3388 [10.3390/rs16183388] [Journal Article/Letter]
2024. "Deep space observations of conditionally averaged global reflectance patterns.", Frontiers in Remote Sensing, 5 [10.3389/frsen.2024.1404461] [Journal Article/Letter]
2024. "A new spectrally-invariant approach to the remote sensing of inhomogeneous clouds.", Frontiers in Remote Sensing, 5 [10.3389/frsen.2024.1392596] [Journal Article/Letter]
2024. "Impacts of Sun Glint Off Ice Clouds on DSCOVR EPIC Cloud Products.", IEEE Transactions on Geoscience and Remote Sensing, 62 1-11 [10.1109/tgrs.2024.3400253] [Journal Article/Letter]
2024. "Influence of cloud retrieval errors due to three-dimensional radiative effects on calculations of broadband shortwave cloud radiative effect.", Atmospheric Chemistry and Physics, 24 (5): 3093-3114 [10.5194/acp-24-3093-2024] [Journal Article/Letter]
2022. "Near‐Cloud Aerosol Retrieval Using Machine Learning Techniques, and Implied Direct Radiative Effects.", Geophysical Research Letters, 49 (20): [10.1029/2022gl098274] [Journal Article/Letter]
2021. "Operational Detection of Sun Glints in DSCOVR EPIC Images.", Frontiers in Remote Sensing, 2 [10.3389/frsen.2021.777806] [Journal Article/Letter]
2021. "Aerosol properties in cloudy environments from remote sensing observations: a review of the current state of knowledge.", Bulletin of the American Meteorological Society, 1-57 [10.1175/bams-d-20-0225.1] [Journal Article/Letter]
2021. "Analysis of Near-Cloud Changes in Atmospheric Aerosols Using Satellite Observations and Global Model Simulations.", Remote Sensing, 13 (6): 1151 [10.3390/rs13061151] [Journal Article/Letter]
2021. "A new measurement approach for validating satellite-based above-cloud aerosol optical depth.", Atmospheric Measurement Techniques, 14 (2): 1405-1423 [10.5194/amt-14-1405-2021] [Journal Article/Letter]
2021. "Deep Space Observations of Terrestrial Glitter.", Earth and Space Science, 8 (2): 2020EA001521 [10.1029/2020ea001521] [Journal Article/Letter]
2020. "Deep Space Observations of Cloud Glints: Spectral and Seasonal Dependence.", IEEE Geoscience and Remote Sensing Letters, 1-5 [10.1109/lgrs.2020.3040144] [Journal Article/Letter]
2019. "Deep Space Observations of Sun Glints from Marine Ice Clouds.", IEEE Geoscience and Remote Sensing Letters, 17 1-5 [10.1109/lgrs.2019.2930866] [Journal Article/Letter]
2019. "Developing an Aircraft-Based Angular Distribution Model of Solar Reflection from Wildfire Smoke to Aid Satellite-Based Radiative Flux Estimation.", Remote Sensing, 11 (13): 1509 [10.3390/rs11131509] [Journal Article/Letter]
2018. "MISR Radiance Anomalies Induced by Stratospheric Volcanic Aerosols.", Remote Sensing, 10 (12): 1875 [10.3390/rs10121875] [Journal Article/Letter]
2018. "Satellite Observations of Cloud-Related Variations in Aerosol Properties.", Atmosphere, 9 (11): 430 [10.3390/atmos9110430] [Journal Article/Letter]
2018. "Scale dependence of cirrus heterogeneity effects. Part II: MODIS NIR and SWIR channels.", Atmospheric Chemistry and Physics, 18 (16): 12105-12121 [10.5194/acp-18-12105-2018] [Journal Article/Letter]
2018. "EPIC Spectral Observations of Variability in Earth’s Global Reflectance.", Remote Sensing, 10 (2): 254 [10.3390/rs10020254] [Journal Article/Letter]
2017. "Observation-Based Study on Aerosol Optical Depth and Particle Size in Partly Cloudy Regions.", Journal of Geophysical Research: Atmospheres, 122 (18): 10,013-10,024 [10.1002/2017jd027028] [Journal Article/Letter]
2017. "Scale dependence of cirrus horizontal heterogeneity effects on TOA measurements – Part I: MODIS brightness temperatures in the thermal infrared.", Atmospheric Chemistry and Physics, 17 (13): 8489-8508 [10.5194/acp-17-8489-2017] [Journal Article/Letter]
2017. "Terrestrial glint seen from deep space: Oriented ice crystals detected from the Lagrangian point.", Geophysical Research Letters, Online [10.1002/2017gl073248] [Journal Article/Letter]
2016. "Testing the Two-Layer Model for Correcting Near Cloud Reflectance Enhancement Using LES/SHDOM Simulated Radiances .", J. Geophys. Res., Atmos., (121): 9661–9674 [10.1002/2016JD025021] [Journal Article/Letter]
2016. "Radiative characteristics of Clouds Embedded in Smoke derived from airborne multi-angular measurements.", J. Geophys. Res. Atmos., 121 (15): 9140–9152 [10.1002/2016jd025309] [Journal Article/Letter]
2015. "Effect of cloud fraction on near-cloud aerosol behavior in the MODIS atmospheric correction ocean color product.", Rem. Sens, 7 5283-5299 [10.3390/rs70505283] [Journal Article/Letter]
2014. "CALIPSO observations of near-cloud aerosol properties as a function of cloud fraction.", Geophys. Res. Lett, 41 9150-9157 [10.1002/2014GL061896] [Journal Article/Letter]
2014. "Near-cloud aerosol properties from the 1 km resolution MODIS ocean product.", J. Geophys. Res. Atmos., 119 (3): 1546-1554 [10.1002/2013JD020633] [Journal Article/Letter]
2014. "Extending 3D near-cloud corrections from shorter to longer wavelengths.", Journal of Quantitative Spectroscopy and Radiative Transfer, 147 79-85 [10.1016/j.jqsrt.2014.05.022] [Journal Article/Letter]
2013. "Shape-induced gravitational sorting of Saharan dust during transatlantic voyage: Evidence from CALIOP lidar depolarization measurements.", Geophys. Res. Lett, 40 (12): 3281-3286 [10.1002/grl.50603] [Journal Article/Letter]
2013. "Improvement of MODIS aerosol retrievals near clouds.", J. Geophys. Res. Atmos., 118 (16): 9168-9181 [10.1002/jgrd.50617] [Journal Article/Letter]
2013. "Multi-satellite aerosol observations in the vicinity of clouds.", Atmos. Chem. Phys., 13 (8): 3899-3908 [10.5194/acp-13-3899-2013] [Journal Article/Letter]
2012. "CALIPSO observations of transatlantic dust: vertical stratification and effect of clouds.", Atmos. Chem. Phys., 12 (23): 11339-11354 [Full Text] [10.5194/acp-12-11339-2012] [Journal Article/Letter]
2012. "Effect of CALIPSO cloud–aerosol discrimination (CAD) confidence levels on observations of aerosol properties near clouds.", Atmospheric Research, 116 134-141 [10.1016/j.atmosres.2012.03.013] [Journal Article/Letter]
2012. "Taking the pulse of pyrocumulus clouds.", Atmospheric Environment, 52 121-130 [10.1016/j.atmosenv.2012.01.045] [Journal Article/Letter]
2012. "Cloud droplet size and liquid water path retrievals from zenith radiance measurements: examples from the Atmospheric Radiation Measurement Program and the Aerosol Robotic Network.", Atmos. Chem. Phys., 12 (21): 10313-10329 [10.5194/acp-12-10313-2012] [Journal Article/Letter]
2012. "Analysis of co-located MODIS and CALIPSO observations near clouds.", Atmos Meas Tech, 5 (2): 389-396 [10.5194/amt-5-389-2012] [Journal Article/Letter]
2012. "A Variational Method to Retrieve the Extinction Profile in Liquid Clouds Using Multiple-Field-of-View Lidar.", J Appl Meteor Climatol, 51 (2): 350-365 [10.1175/JAMC-D-10-05007.1] [Journal Article/Letter]
2011. "Cloud Impact on Surface Altimetry From a Spaceborne 532-nm Micropulse Photon-Counting Lidar: System Modeling for Cloudy and Clear Atmospheres.", IEEE Trans. Geosci. Remote Sensing, 49 (12): 4910-4919 [Full Text] [10.1109/TGRS.2011.2153860] [Journal Article/Letter]
2011. "Implementation on Landsat Data of a Simple Cloud-Mask Algorithm Developed for MODIS Land Bands.", IEEE Geosci. Remote Sensing Lett., 8 (4): 597-601 [10.1109/LGRS.2010.2095409] [Journal Article/Letter]
2011. "Global CALIPSO Observations of Aerosol Changes Near Clouds.", IEEE Geosci. Remote Sensing Lett., 8 (1): 19-23 [10.1109/LGRS.2010.2049982] [Journal Article/Letter]
2010. "Multiyear Statistics of 2D Shortwave Radiative Effects at Three ARM Sites.", J Atmos Sci, 67 (11): 3757-3762 [10.1175/2010JAS3506.1] [Journal Article/Letter]
2010. "Uncertainties in Ice-Sheet Altimetry From a Spaceborne 1064-nm Single-Channel Lidar Due to Undetected Thin Clouds.", IEEE Trans. Geosci. Remote Sensing, 48 (1): 250-259 [10.1109/TGRS.2009.2028335] [Journal Article/Letter]
2009. "MODIS observations of enhanced clear sky reflectance near clouds.", Geophys. Res. Lett., 36 (6): L06807 [10.1029/2008GL037089] [Journal Article/Letter]
2008. "The Potential for Improved Boundary Layer Cloud Optical Depth Retrievals from the Multiple Directions of MISR.", Journal of the Atmospheric Sciences, 65 (10): 3179-3196 [10.1175/2008JAS2627.1] [Journal Article/Letter]
2007. "Potential for airborne offbeam lidar measurements of snow and sea ice thickness.", J. Geophys. Res., 112 (C12): C12S90 [10.1029/2007JC004091] [Journal Article/Letter]
2007. "View angle dependence of cloud optical thicknesses retrieved by Moderate Resolution Imaging Spectroradiometer (MODIS).", J. Geophys. Res., 112 (D6): D06203 [10.1029/2005JD006912] [Journal Article/Letter]
2006. "Impact of three-dimensional radiative effects on satellite retrievals of cloud droplet sizes.", J. Geophys. Res., 111 (D9): D09207 [10.1029/2005JD006686] [Journal Article/Letter]
2006. "New directions in the radiative transfer of cloudy atmospheres.", Eos Trans. AGU, 87 (5): 52 [10.1029/2006EO050006] [Journal Article/Letter]
2005. "The International Intercomparison of 3D Radiation Codes (I3RC): Bringing together the most advanced radiative transfer tools for cloudy atmospheres.", Bull Amer Meteor Soc, 86 (9): 1275-1293 [10.1175/BAMS-86-9-1275] [Journal Article/Letter]
2005. "THOR—Cloud Thickness from Offbeam Lidar Returns.", Journal of Atmospheric and Oceanic Technology, 22 (6): 605-627 [10.1175/JTECH1740.1] [Journal Article/Letter]
2003. "A method for analyzing how various parts of clouds influence each other's brightness.", J. Geophys. Res., 108 (D22): 4706 [10.1029/2003JD003561] [Journal Article/Letter]
2002. "Observations of three-dimensional radiative effects that influence satellite retrievals of cloud properties.", Quart Jour of Hungarian Meteor Service (Idojaras), 106 265-278 [Journal Article/Letter]
2002. "Observations of three-dimensional radiative effects that influence MODIS cloud optical thickness retrievals.", J Atmos Sci, 59 1607-1618 [Journal Article/Letter]
2001. "Statistical analysis of the uncertainties in cloud optical depth retrievals caused by three-dimensional radiative effects.", J Atmos Sci, 58 1540-1548 [Journal Article/Letter]