Department of Atmospheric Sciences
University of Washington
408 ATG Building
Seattle, WA 98195-1640
Dr. Marchand's research focuses on improving the representation of clouds in climate and cloud resolving models. In recent years, he has developed and applied MISR and CloudSat instrument simulators (which are part of the Cloud Feedback Model Intercomparison Project (CFMIP) Observations Simulator Package, COSP) to the study of the Multiscale Modeling Framework climate model and its associated cloud-resolving model (the System for Atmospheric Modeling). More broadly, his research includes developing cloud property retrievals based on satellites and ground-based systems, as well as validating retrievals using airborne in situ observations. Dr. Marchand has participated in many field campaigns including FIRE-ACE, CRYSTAL-FACE, ARM-2000, M-PACE and most recently StormVEx. He is a member of the NASA CloudSat and MISR instrument teams and a long time participant in the U.S. Department of Energy Atmospheric System Research program, as well as a participant in the Center for Multiscale Modeling of Atmospheric Processes (CMMAP). Dr. Marchand earned his Ph.D in electrical engineering from Virginia Tech in 1997 and since that time has held research positions at Penn State University, the U.S. Department of Energy Pacific Northwest National Laboratory, and the University of Washington Joint Institute for the Study of the Atmosphere and Ocean. He is currently a research associate professor in the Department of Atmospheric Sciences at the University of Washington.
Virginia Polytechnic Institute and State University, Electrical Engineering, Ph. D. 1997
Virginia Polytechnic Institute and State University, History, BA, 1996
Virginia Polytechnic Institute and State University, Electrical Engineering, MS, 1993
Virginia Polytechnic Institute and State University, Electrical Engineering, BS, 1990
Research Assistant, Dept. of Meteorology, Pennsylvania State University 1997-1999
Atmospheric Scientist, Pacific Northwest National Laboratory, U.S. Dept. of Energy 1999 – 2007
Atmospheric Scientist, Joint Institute for the Study of the Atmosphere and Ocean,
University of Washington, 2007 – 2011
Research Associate Professor, Dept of Atmospheric Sciences,
University of Washington, 2012 – present
Marchand, R. (2013), Trends in ISCCP, MISR, and MODIS cloud-top-height and optical-depth histograms, J. Geophys. Res. Atmos., 118, doi:10.1002/jgrd.50207.
Evans, S. M., R. T. Marchand, T. P. Ackerman, and N. Beagley (2012), Identification and analysis of atmospheric states and associated cloud properties for Darwin, Australia, J. Geophys. Res., 117, D06204, doi:10.1029/2011JD017010.
Marchand, R. (2012), Spatial correlation of hydrometeor occurrence, reflectivity, and rain rate from CloudSat, J. Geophys. Res., 117, D06202, doi:10.1029/2011JD016678.
Kay, J. E., Hillman, B., Klein, S., Zhang, Y., Medeiros, B., Gettelman, G., Pincus, R., Eaton, B., Boyle, J., Marchand, R. and T. Ackerman (2012): Exposing global cloud biases in the Community Atmosphere Model (CAM) using satellite observations and their corresponding instrument simulators, J. Climate, doi: 10.1175/JCLI-D-11-00469.1
Bodas-Salcedo A, Webb MJ, Bony S, Chepfer H, Dufresne JL, Klein S, Zhang Y, Marchand R, Haynes JM, Pincus R, John VO, (2011), COSP: satellite simulation software for model assessment, Bull. Am. Meteorol. Soc. DOI:10.1175/2011BAMS2856.1.
Marchand, Roger and Thomas Ackerman (2011), A Cloud-Resolving Model with an Adaptive Vertical Grid for Boundary Layer Clouds. J. Atmos. Sci., 68, 1058–1074. doi: 10.1175/2010JAS3638.1
Marchand, R., and T. Ackerman (2010), An analysis of cloud cover in multiscale modeling framework global climate model simulations using 4 and 1 km horizontal grids, J. Geophys. Res., 115, D16207, doi:10.1029/2009JD013423.
Marchand, R., T. Ackerman, M. Smyth, and W. B. Rossow (2010), A review of cloud top height and optical depth histograms from MISR, ISCCP, and MODIS, J. Geophys. Res., 115, D16206, doi:10.1029/2009JD013422.
Liu, Z., R. Marchand, and T. Ackerman (2010), A comparison of observations in the tropical western Pacific from ground-based and satellite millimeter-wavelength cloud radars, J. Geophys. Res., 115, D24206, doi:10.1029/2009JD013575.
Marchand, R. T., N. Beagley, N. and T. Ackerman, (2009), Evaluation of Hydrometeor Occurrence Profiles in the Multiscale Modeling Framework Climate Model using Atmospheric Classification, J. Climate, 22, 4557–4573.
Marchand, R., J. Haynes, G. G. Mace, T. Ackerman, and G. Stephens (2009), A comparison of simulated cloud radar output from the multiscale modeling framework global climate model with CloudSat cloud radar observations, J. Geophys. Res., 114, D00A20, doi:10.1029/2008JD009790.
Mace, G. G., Q. Zhang, M. Vaughan, R. Marchand, G. Stephens, C. Trepte, and D. Winker (2009), A description of hydrometeor layer occurrence statistics derived from the first year of merged Cloudsat and CALIPSO data, J. Geophys. Res., 114, D00A26, doi:10.1029/2007JD009755.
Marchand, R., G.G. Mace, T. Ackerman, and G. Stephens (2008), Hydrometeor Detection Using Cloudsat—An Earth-Orbiting 94-GHz Cloud Radar. J. Atmos. Oceanic Technol., 25, 519–533.
McFarlane, S. A., and R. T. Marchand (2008), Analysis of ice crystal habits derived from MISR and MODIS observations over the ARM Southern Great Plains site, J. Geophys. Res., 113, D07209, doi:10.1029/2007JD009191.
Stephens, G. L., et al. (2008), CloudSat mission: Performance and early science after the first year of operation, J. Geophys. Res., 113, D00A18, doi:10.1029/2008JD009982, [printed 114(D8), 2009].
Tanelli, S., Durden, S. L., Im, E., Pak, K. S., Reinke, D. G., Partain, P., Haynes, J. M., and Marchand, R. T. (2008), CloudSat's Cloud Profiling Radar After Two Years in Orbit: Performance, Calibration, and Processing, IEEE Trans. on Geoscience and Remote Sensing, 46(11), p. 3560 - 3573, doi:10.1109/TGRS.2008.2002030.
Zhang, Y., S. A. Klein, C. Liu, B. Tian, R. T. Marchand, J. M. Haynes, R. B. McCoy, Y. Zhang, and T. P. Ackerman (2008), On the diurnal cycle of deep convection, high-level cloud, and upper troposphere water vapor in the Multiscale Modeling Framework, J. Geophys. Res., 113, D16105, doi:10.1029/2008JD009905
Marchand, R. T., T. P. Ackerman, and C. Moroney (2007) An assessment of Multiangle Imaging Spectroradiometer (MISR) stereo-derived cloud top heights and cloud top winds using ground-based radar, lidar, and microwave radiometers, J. Geophys. Res., 112, D06204, doi:10.1029/2006JD007091.
Haynes, J. M., R. T. Marchand, Z. Luo, A. Bodas-Salcedo, and G. L. Stephens (2007), A Multipurpose Radar Simulation Package: QuickBeam.” Bulletin of the American Meteorological Society, Vol. 88, Issue 11 (November 2007) pp. 1723–172 DOI: 10.1175/BAMS-88-11-1723
Kahn, B. H., M. T. Chahine, G. L. Stephens, G. G. Mace, R. T. Marchand, Z. Wang, C. D. Barnet, A. Elderin, R. E. Holz, R. E. Kuehn, and D. G. Vane (2007), Cloud type comparisons of AIRS, CloudSat, and CALIPSO cloud height and amount, Atmos. Chem. Phys. Discuss., 7, p. 13915–13958.
Mace, G. G., R. T. Marchand, Q. Zhang, and G. L. Stephens, 2007, Global hydrometeor occurrence as observed by CloudSat: Initial observations from summer 2006, Geophys. Res. Lett., Vol. 34, L09808, doi:10.1029/2006GL029017
Ovtchinnikov M. and Marchand R.T. (2007) Cloud model evaluation using radiometric measurements from the airborne multiangle imaging spectroradiometer (AirMISR), Remote Sensing of Environment, 107 (1-2), pp. 185-193, doi:10.1016/j.rse.2006.05.024
Marchand, R.T., N. Beagley, S. Thompson, T.P. Ackerman, D. M. Schultz, 2006: A Bootstrap Technique for Testing the Relationship Between Local-Scale Radar Observations of Cloud Occurrence and Large-Scale Atmospheric Fields, J. Atmos. Sci., 63(11), p. 2813–2830.
Ovtchinnikov, Mikahil, Thomas P. Ackerman, Roger T. Marchand, and Marat Khairoutdinov, 2006 “Evaluation of the Multi-Scale Modeling Framework Using Data from the Atmospheric Radiation Measurement Program,” Journal of Climate, 19 (9): 1716-1729
McFarlane, Sally A., Marchand, Roger T., Ackerman, Thomas P., 2005 “Retrieval of cloud phase and crystal habit from Multiangle Imaging Spectroradiometer (MISR) and Moderate Resolution Imaging Spectroradiometer (MODIS) data,” Journal of Geophysical Research, Vol. 110, No. D14, D14201, 10.1029/2004JD004831.
Marchand R. T. and T. P. Ackerman, 2004 "Evaluation of radiometric measurements from the NASA Multi-Angle Spectro-Radiometer from an inhomogeneous cloud using a combination of 2D and 3D radiative transfer modeling", J. of Geophy. Res., 109, D18208 doi:10.1029/2004JD004710
Marchand, R., T. Ackerman, E. R. Westwater, S. A. Clough, K. Cady-Pereira, and J. C. Liljegren, 2003, An assessment of microwave absorption models and retrievals of cloud liquid water using clear-sky data, J. Geophys. Res., 108(D24), 4773, doi:10.1029/ 2003JD003843.
Ackerman, T. P., D. M. Flynn, and R. T. Marchand, Quantifying the magnitude of anomalous solar absorption,
J. Geophys. Res., 108(D9), 4273, doi:10.1029/2002JD002674, 2003.
Kassianov, E., T. Ackerman, R. Marchand, and M. Ovtchinnikov, Satellite multiangle cumulus geometry retrieval: Case
study, J. Geophys. Res., 108(D3), 4117, doi:10.1029/2002JD002350, 2003.
Kassianov, Evgueni, Thomas Ackerman, Roger Marchand and Mikhail Ovtchinnikov (2003), Stochastic radiative transfer in multilayer broken clouds. Part II: validation tests, J. of Quantitative Spectroscopy and Radiative Transfer, 77(4), p. 395-416, doi:10.1016/S0022-4073(02)00171-1
Michalsky, J., Q. Min, J. Barnard, R. Marchand, and P. Pilewskie (2003), Simultaneous spectral albedo measurements near the Atmospheric Radiation Measurement Southern Great Plains (ARM SGP) central facility, J. Geophys. Res., 108(D8), 4254, doi:10.1029/2002JD002906.
Min, Q.-L., M. Duan, and R. Marchand (2003), Validation of surface retrieved cloud optical properties with in situ measurements at the Atmospheric Radiation Measurement Program (ARM) South Great Plains site, J. Geophys. Res., 108(D17), 4547, doi:10.1029/2003JD003385.
Vanbauce, C., B. Cadet, and R. T. Marchand (2003), Comparison of POLDER apparent and corrected oxygen pressure to ARM/MMCR cloud boundary pressures, Geophys. Res. Lett., 30(5), 1212, doi:10.1029/2002GL016449.
Dong, Xiquan, Gerald G. Mace, Patrick Minnis, William L. Smith, Michael Poellot, Roger T. Marchand, Anita D. Rapp, 2002: Comparison of Stratus Cloud Properties Deduced from Surface, GOES, and Aircraft Data during the March 2000 ARM Cloud IOP. J. Atmos. Sci., 59, 3265-3284
Marchand, R. T., Ackerman, T. P., King, M. D. Moroney, C., Davies, R., Muller, Jan-Peter A. L. and Hermann, G., 2001 “Multiangle observations of Arctic clouds from FIRE ACE: June 3, 1998 case study,” Journal of Geophysical Research, v. 106, n. D14, p. 15201-214.
Riedi, J., P. Goloub, and R. T. Marchand (2001), Comparison of POLDER cloud phase retrievals to active remote sensors measurements at the ARM SGP site, Geophys. Res. Lett., 28(11), 2185–2188, doi:10.1029/2000GL012758.
Clothiaux EE, Ackerman TP, Mace GG, Moran KP, Marchand RT, Miller MA, Martner BE, 2000 “Objective determination of cloud heights and radar reflectivities using a combination of active remote sensors at the ARM CART sites,” J APPL METEOROL 39 (5): 645-665 MAY 2000
Hinkelman, L. M., Ackerman, T. P. and Marchand, R. T. “An evaluation of the NCEP Eta model predictions of surface energy budget and cloud properties by comparison to measured ARM data,” Journal of Geophysical Research, 104 (D16): 19535-19549 AUG 27 1999
Marchand, R.T., Brown, G.S., 1999: On the use of finite surfaces in the numerical prediction of rough surface scattering, IEEE Trans. Antennas and Propagation, 47(4), p. 600 – 604, doi:10.1109/8.768797
Marchand, R. T., and G. S. Brown (1998), Inferring rough surface parameters from average scattering data using approximate scattering models 1. Gaussian spectrum, Radio Sci., 33(4), 821–834, doi:10.1029/98RS01100.
Marchand, R. T., and G. S. Brown (1998), Inferring rough surface parameters from average scattering data using approximate scattering models 2. Pierson-Moskowitz spectrum, Radio Sci., 33(4), 835–843, doi:10.1029/98RS01101.
Toporkov, J.V., Marchand, R.T., Brown, G.S. 1998: On the discretization of the integral equation describing scattering by rough conducting surfaces, IEEE Trans. Antennas and Propagation, 46(1), p. 150-161, doi:10.1109/8.655462
Marchand, Roger, Sedki Riad, and A. Elshabini-Riad, 1996: A combined octant/Delaunay method for fully automatic 3D mesh generation with multiple level octant differences, Communications in Numerical Methods in Engineering, 12(6), p. 343–349, DOI: 10.1002/(SICI)1099-0887(199606)12:6<343::AID-CNM982>3.0.CO;2-O