Profile for Lazaros Oreopoulos
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| Title: | Chief, Climate & Radiation Laboratory |
|---|---|
| Affiliation: | NASA Civil Service |
| Contact: |
E-mail NASA GSFC Code 613 Greenbelt, MD 20771 Office Phone: 301-614-6128 Fax: 301-614-6307 |
Brief Bio
Dr. Lazaros Oreopoulos (a.k.a Lazaros Oraiopoulos) is the Chief of the Climate and Radiation Lab. He has been at GSFC since 1997, initially with JCET/UMBC (1997-2008) and then as a civil servant (2008-present). He conducts research on the modeling and remote sensing of clouds, cloud-aerosol interactions, and many aspects of atmospheric radiative transfer for climatic applications. He is the Deputy Project Scientist for the Aqua satellite mission, and a member of the CloudSat Science Team, the GEWEX GASS Science Steering Committee, and the International Radiation Commission. He has also served as a member of the Landsat Science Team, the AMS Atmospheric Radiation Committee, and the GEWEX Radiation Panel. Dr. Oreopoulos holds a B. Sc. in Physics from Aristotle's University of Thessaloniki, Greece, and M. Sc. and Ph. D. degrees in Atmospheric Sciences from McGill University, Montreal. For more details please download CV. Web of Science publications and citation metrics can be found here; see also Google Scholar.
Publications
Huang, X., Cole, J.N.S., F. He, G.L. Potter, L. Oreopoulos, D. Lee, N.G. Loeb, and M. Suarez (2013). Longwave band-by-band cloud radiative effect and its application in GCM evaluation. J. Climate, 26, 450-467.
doi: http://dx.doi.org/10.1175/JCLI-D-12-00112.1
Lee, D., L. Oreopoulos, G.J. Huffman, W.B. Rossow, and I.-S. Kang (2013). The precipitation characteristics of ISCCP tropical weather states. J. Climate, 26, 772-788.
doi: http://dx.doi.org/10.1175/JCLI-D-11-00718.1
Meyer, K., S. Platnick, L. Oreopoulos, and D. Lee (2013). Estimating the direct radiative effect of absorbing aerosols overlying marine boundary layer clouds in the southeast Atlantic using MODIS and CALIOP. J. Geophy., Res.
doi:10.1002/jgrd.50449
Randles, C., S. Kinne, G. Myhre, M. Schulz, Pl Stier, J. Fischer, L. Doppler, E. Highwood, C. Ryder, B. Harris, J. Huttunen, Y. Ma, R.T. Pinker, B. Mayer, D. Neubauer, R. Hitzenberger, L. Oreopoulos, D. Lee, G. Pitari, G. DiGenova, J. Quaas, F.G. Rose, S. Kato, S.T. Rumbold, I. Vardavas, N. Hatzianastassiou, C. Matsoukas, H. Yu, F. Zhang, H. Zhang, and P. Lu (2013). Intercomparison of shortwave radiative transfer schemes in global aerosol modeling: Results from the AeroCom Radiative Transfer Experiment. Atmos. Chem. Phys., 13, 2347-2379.
doi:10.5194/acp-13-2347-2013
Sud, Y., D. Lee, L. Oreopoulos, D. Barahona, A. Nenes, and M.J. Suarez (2013). Performance of McRAS-AC in the GEOS-5 AGCM: aerosol-cloud-microphysics, precipitation, cloud radiative effects, and circulation. Geosci. Model Dev, 6, 57-79.
doi:10.5194/gmd-6-57-2013
Wen, G., R.F. Cahalan, J.D. Haigh, P. Pilewskie, L. Oreopoulos, and J.W. Harder (2013). Reconciliation of Modeled Climate Responses to Solar Spectral Forcing. J. Geophy., Res, (Submitted).
Wilson, M., and L. Oreopoulos (2013). Enhancing a Simple MODIS Cloud Mask Algorithm for the Landsat Data Continuity Mission. IEEE TGRS, 51(2), 723-730.
10.1109/TGRS.2012.2203823
Yi, B., P. Yang, B.A. Baum, T. L'Ecuyer, L. Oreopoulos, E.J. Mlawer, A.J. Heymsfield, and K.N. Liou (2013). Influence of ice particle surface roughening on the global cloud radiative effect. J. Atmos. Sci, (In Press).
Morales Betancourt, R., D. Lee, L. Oreopoulos, Y. C. Sud, D. Barahona, and A. Nenes (2012). Sensitivity of cirrus and mixed-phase clouds to the ice nuclei spectra in McRAS-AC: single column model simulations. Atmos. Chem. Phys, 12, 10679-10692.
doi:10.5194/acp-12-10679-2012
Oreopoulos, L., E. Mlawer, J. Delamere, T. Shippert, J. Cole, B. Fomin, M. Iacono, Z. Jin, J. Li, J. Manners, P. Raisanen, F. Rose, Y. Zhang, M. Wilson, and W. Rossow (2012). The Continual Intercomparison of Radiation Codes: Results from Phase I. J. Geophy., Res, 117, D06118.
doi:10.1029/2011JD016821
Oreopoulos, L., D. Lee, Y.C. Sud, and M.J. Suarez (2012). Radiative impacts of cloud heterogeneity and overlap in an atmospheric General Circulation Model. Atmos. Chem. Phys, 12, 9097-9111.
doi:10.5194/acp-12-9097-2012
Yuan, T., L. A. Remer, H. Bian, J.R. Ziemke, R. Albrecht, K.E. Pickering, L. Oreopoulos, S.J. Goodman, H. Yu, and D. J. Allen (2012). Aerosol indirect effect on tropospheric ozone via lightning. J. Geophys. Res-Atmos, 117, D18213.
doi:10.1029/2012JD017723
Oreopoulos L., and P. M. Norris (2011). An analysis of cloud overlap at a midlatitude atmospheric observation facility. Atmos. Chem. Phys., 11, 5557-5567.
doi:10.5194/acp-11-5557-2011
Oreopoulos L., and W. B. Rossow (2011). The cloud radiative effects of International Satellite Cloud Climatology Project weather states. J. Geophys. Res., 116, D12202.
doi:10.1029/2010JD015472
Oreopoulos, L., and E. Mlawer (2010). The Continual Intercomparison of Radiation Codes (CIRC): Assessing anew the quality of GCM radiation algorithms. Bull. Am. Met. Soc., 91, 305-310.
doi:10.1175/2009BAMS2732.1
Oreopoulos L., M.J. Wilson, and T. Varnai (2010). Implementation on Landsat Data of a Simple Cloud Mask Algorithm Developed for MODIS Land Bands. IEEE Geosc. & Rem. Sens. Lett., 99, 597-601.
doi:10.1109/LGRS.2010.2095409
Joiner J., M. R. Schoeberl, A. P. Vasilkov, L. Oreopoulos, S. Platnick, N. J. Livesey, and P. F. Levelt (2009). Accurate satellite-derived estimates of the tropospheric ozone impact on the global radiation budget. Atmos. Chem. Phys., 9(13), 4447-4465.
doi:10.5194/acp-9-4447-2009
Oreopoulos L., S. Platnick, G. Hong, P. Yang, and R.F. Cahalan (2009). The shortwave radiative forcing bias of liquid and ice clouds from MODIS observations. Atmos. Chem. Phys, 9(16), 5865-5875.
doi:10.5194/acp-9-5865-2009
Oreopoulos L., E. Mlawer, J. Delamere, and T. Shippert (2009). The Continual Intercomparison of Radiation Codes (CIRC): A New Standard for Evaluating GCM Radiation Codes [PowerPoint slides]. Retrieved from Current Problems in Atmospheric Radiation (IRS 2008 Proceedings)
Oreopoulos L., S.E. Platnick, G. Hong, P. Yang, and R.F. Cahalan (2009). The Shortwave Radiative Forcing Bias of Homogeneous Liquid and Ice Clouds Observed by MODIS [PowerPoint slides]. Retrieved from Current Problems in Atmospheric Radiation (IRS 2008 Proceedings)
Oreopoulos L., and E. Mlawer (2009). CIRC to Provide Key Intercomparisons of GCM Radiative Transfer Codes Prior to Next IPCC Assessment GEWEX Feb 09 Newsletter, p.8
Vasilkov A. P., J. Joiner, L. Oreopoulos, J.F. Gleason, P. Veefkind, E. Bucsela, E.A. Celarier, R. J. D. Spurr, and S. Platnick (2009). Impact of tropospheric nitrogen dioxide on the regional radiation budget. Atmos. Chem. Phys. 9, 6389-6400.
Vasilkov A.P., J. Joiner, L. Oreopoulos, J.F. Gleason, P. Veefkind, E. Bucsela, E.A. Celarier, R.J.D. Spurr, and S.E. Platnick (2009). Impact of tropospheric nitrogen dioxide on the regional radiation budget.. Atmos. Chem. Phys., 9, 6389-6400.
Koren I., L. Oreopoulos, G. Feingold, L.A. Remer, and O. Altaratz (2008). How small is a small cloud?. Atmos. Chem. Phys., 8(2), 6379-6407.
doi:10.5194/acpd-8-6379-2008
Lin, X., Stolarski, S., Tao, W., Tao, W., Alkhaled, A.A., Yi, B., Shen, B., Zhang, H., Jainn Jong Shi, A. Y. Hou, Anne R. Douglass, R. Hoff, P. Yang, J. J. Shi, W. K. Tao, S. Kondragunta, Ellis E. Remsberg, Y. L. Lin, Pay Lin Lin, B.A. Baum, P. L. Lin, Nathaniel J. Livesey, I. Laszlo, T. LEcuyer, Jhihying Chen, J. Chen, L. Oreopoulos, John C. Gille, S. Lang, A. Lyapustin, S. E. Lang, A.M. Michalak, M. Y. Chang, Mei Yu Chang, E.J. Mlawer, Ming Jen Yang, A.J. Heymsfield, M. J. Yang, K.N. Liou, C. C. Wu, Chun Chien Wu, Christa Peters Lidard, C. Peters-Lidard, C. H. Sui, S.R. Kawa, Chung Hsiung Sui, C. D. Jou, Ben Jong Dao Jou, S.C. Olsen, and J-W. Wang (2008). A global evaluation of the regional spatial variability of column integrated CO2 distributions. J. Geophys. Res., 113, D20303.
10.1029/2007JD009693
Norris P. M., L. Oreopoulos, A.Y. Hou, W.K. Tao, and X. Zeng (2008). Representation of 3D heterogeneous cloud fields using copulas: Theory for water clouds. Q. J. R. Meteorol. Soc., 1843-1864.
doi:13410.1002/qj.321
Oreopoulos L., and S. Platnick (2008). The radiative susceptibility of cloudy atmospheres to droplet number perturbations: 2. Global analysis from MODIS. J. Geophys. Res., 113(D14S21).
doi:10.1029/2007JD009655
Platnick S., and L. Oreopoulos (2008). The radiative susceptibility of cloudy atmospheres to droplet number perturbations: 1. Theoretical analysis and examples from MODIS. J. Geophys. Res., 113(D14S20).
doi:10.1029/2007JD009654
Oreopoulos L., R. Cahalan, and S. Platnick (2007). The plane-parallel albedo bias of liquid clouds from MODIS observations. J. Climate, 20, 5114-5125.
Oreopoulos L., A. Marshak, R.F. Cahalan, T. Varnai, A. B. Davis, and A. Macke (2006). New Directions in the Radiative Transfer of Cloudy Atmospheres EOS, No. 5, 31 January 2006
Cahalan R.F., L. Oreopoulos, A. Marshak, K. F. Evans, A. Davis, R. Pincus, K. Yetzer, B. Mayer, R. Davies, T. Ackerman, H. Barker, E. Clothiaux, R. Ellingson, M. Garay, E. Kassianov, S. Kinne, A. Macke, OHirok W., P. Partain, S. Prigarin, A. Rublev, G. Stephens, F. Szczap, E. Takara, T. Varnai, G. Wen, and T. Zhuravleva (2005). The International Intercomparison of 3D Radiation Codes (I3RC): Bringing together the most advanced radiative transfer tools for cloudy atmospheres. Bull. Amer. Meteor. Soc. (9), 86, 1275-1293.
Oreopoulos L., and R.F. Cahalan (2005). Cloud inhomogeneity from MODIS. J. Climate, No. 23, 18, 5110.
10.1175/JCLI3591.1
Oreopoulos L. (2005). The impact of subsampling on MODIS Level-3 statistics of optical thickness and effective radius. IEEE Trans. Geosc. Rem. Sens., 43(2), 366-373.
Oreopoulos L., M. -D. Chou, M. Khairoutdinov, H. W. Barker, and R.F. Cahalan (2004). Performance of Goddard Earth Observing System GCM column radiation models under heterogeneous cloud conditions. Atmospheric Research, 72, 365-382.
Oreopoulos L., A. Marshak, and R.F. Cahalan (2003). Consistency of ARESE II cloud absorption estimates and sampling issues. J. Geophys. Res. (D1), 4029, 108.
10.1029/2002JD002243
Oreopoulos L., and M. Khairoutdinov (2003). Overlap properties of clouds generated by a cloud-resolving model. J. Geophys. Res. (D15), 4479, 108.
10.1029/2002JD003329
Cahalan R.F., L. Oreopoulos, G. Wen, A. Marshak, S.C. Tsay, and T. P. DeFelice (2001). Cloud characterization and clear sky correction from Landsat 7. Remote Sens. Environ., 78, 83-98.
Wen G., R.F. Cahalan, T. -S. Tsay, and L. Oreopoulos (2001). Impact of cumulus cloud spacing on Landsat atmospheric correction and aerosol retrieval. J. Geophys. Res. - Atmos., 106, 12129-12138.
Oreopoulos L., A. Marshak, R. Cahalan, and G. Wen (2000). Cloud three-dimensional effects evidenced in Landsat spatial power spectra and autocorrelation function. J. Geophys. Res., 105, 14777-14788.
Oreopoulos L., R. Cahalan, A. Marshak, and G. Wen (2000). A new normalized difference cloud retrieval technique applied to Landsat radiances over the Oklahoma ARM Site. J. Appl. Meteor., 39, 2305-2320.
Marshak A., L. Oreopoulos, A. Davis, W. Wiscombe, and R. Cahalan (1999). Horizontal radiative fluxes in clouds and accuracy of the Independent Pixel Approximation at absorbing wavelengths. Geophys. Res. Lett., 11, 1585-1588.
Marshak A., W. Wiscombe, A. Davis, L. Oreopoulos, and R. Cahalan (1999). On the removal of the effect of horizontal fluxes in two-aircraft measurements of cloud absorption. Quart. J. Roy. Meteor. Soc., 125, 2153-2170.
Oreopoulos L., and H. W. Barker (1999). Accounting or subgrid-scale cloud variability in a multi-layer 1D solar radiative transfer algorithm. Q.J.R. Meteorol. Soc., 125, 301-330.
Wen G., S.C. Tsay, R. Cahalan, and L. Oreopoulos (1999). Path radiance technique for retrieving aerosol optical thickness over land. J. Geophys. Res. - Atmos., 104, 31321-31332.
Oreopoulos L., and R. Davies (1998). Plane Parallel Albedo Biases from Satellite Observations. Part II: Parameterizations for Bias Removal. J. Climate, 11, 933-944.
Oreopoulos L., and R. Davies (1998). Plane Parallel Albedo Biases from Satellite Observations. Part I: Dependence on Resolution and Other Factors. J. Climate, 11, 919-932.
Oreopoulos L., and R. Davies (1993). Statistical Dependence of Albedo and Cloud Cover on Sea Surface Temperature for Two Tropical Marine Stratocumulus Regions. J. Climate, 6, 2434-2447.