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You are here: Home / People / Eugene E. Clothiaux
Eugene E. Clothiaux

Eugene E. Clothiaux

  • Professor of Meteorology
603A Walker Building
University Park, PA 16802
Phone: (814) 865-2915


  1. Ph.D. -- Brown University

Research Specialties:

Radiative Transfer:
Remote Sensing:

My research involves scientific disciplines of ground- and satellite-based remote sensing of clouds with an emphasis on trying to understand the impact of clouds on the radiation budget of the Earth. I have worked with wind-profiler radars, high-frequency short-wavelength cloud radars, micro-pulse lidar, and microwave radiometers. Collectively, these instruments are at the core of ground-based retrievals of cloud properties. Understanding the impact of cloud properties on the radiation budget of the Earth is an important topic in current numerical weather prediction and climate change research. I have translated results from ground-based retrieval research into many collaborative ventures related to the energy budget of the Earth, including studies on clear-sky radiative transfer, cirrus properties, and photon path length within the oxygen A-band.


  • Member of Graduate Faculty

Research Interests:

Atmospheric radiative transfer, ground- and satellite-based observations of clouds and the surface, cloud and radiative transfer parameterizations in numerical weather prediction and climate models.

Teaching Interests:

Atmospheric physics, radiative transfer, millimeter-wave radar remote sensing of clouds and precipitation.

Eugene E. Clothiaux was born in Las Cruces, New Mexico on (Friday) October 13, 1961. He spent most of his early years in Auburn, Alabama, and later attended Auburn University, where he received the B.Sc. degree in physics in 1983. He attended Brown University for graduate research, obtaining the M.S. degree in physics in 1986 and the Ph.D. degree in physics in 1990. The primary focus of his Ph.D. work was comparisons of the predictions of a neural network model for synaptic plasticity in kitten visual cortex with experimental data. In 1991 he was awarded a Department of Energy Global Change Distinguished Post-Doctoral Fellowship to study radar returns from clear-air turbulence and clouds using a number of different radars developed at the Pennsylvania State University. He is currently a professor in the Department of Meteorology at the Pennsylvania State University, where his interests are ground- and satellite-based remote sensing of clouds with an emphasis on trying to understand the impact of clouds on the radiation budget of the Earth. During the course of his work, he has participated in a number of observational programs, including the First International Satellite Cloud Climatology Project Regional Experiments in Coffeyville, Kansas, the Atlantic Stratocumulus Transition Experiment in Santa Maria, The Azores, the Maritime Continent Thunderstorm Experiment in Darwin, Australia, and the Department of Energy Atmospheric Radiation Measurement Program experiments now underway in the Southern Great Plains of the United States, the North Slope of Alaska, and the tropical western Pacific. He has also participated in the development of cloud detection algorithms applied to data from the Multi-Angle Imaging Spectrometer Radiometer developed by the Jet Propulsion Laboratory and flown on the NASA EOS TERRA platform. He is currently a member of the American Geophysical Union and the American Meteorological Society.

Selected Publications:

Clothiaux, E.E., R.S. Penc, D.W. Thomson, T.P. Ackerman and S.R. Williams, 1993: A First-guess feature-based algorithm for estimating wind speed in clear-air doppler radar spectra.  J. Atmos. and Oceanic Technol.,  11, 888-908.

Clothiaux, E.E., M.A. Miller, B.A. Albrecht, T.P. Ackerman, J. Verlinde, D.M. Babb, R.M. Peters and W.J. Syrett, 1995: An evaluation of a 94-GHz radar for remote sensing of cloud properties.  J. Atmos. and Oceanic Technol.,  12, 201-229.

Baum, B.A., T. Uttal, M. Poellot, T.P. Ackerman, J.M. Alvarez, J. Intrieri, D.O'C Starr, J. Titlow, V. Tovinkere and E.E. Clothiaux, 1995: Satellite remote sensing of multiple cloud layers.  J. Atmos. Sci.,  52, 4210-4230.

Syrett, W.J., B.A. Albrecht and E.E. Clothiaux, 1995: Vertical cloud structure in a midlatitude cyclone from a 94-GHz radar.  Mon. Wea. Rev.,  123, 3393-3407.

Uttal, T., E.E. Clothiaux, T.P. Ackerman, J.M. Intrieri and W.L. Eberhard, 1995: Cloud boundary statistics during FIRE II.  J. Atmos. Sci.,  52, 4276-4284.

Danne, O., G.G. Mace, E.E. Clothiaux, X. Dong, T.P. Ackerman and M. Quante, 1996: Observing structures and vertical motions within stratiform clouds using a vertical pointing 94-GHz cloud radar.  Contributions Atmos. Phys.,  69, 229-237.

Dong, X., T.P. Ackerman, E.E. Clothiaux, P. Pilewskie and Y. Han, 1997: Microphysical and radiative properties of boundary layer stratiform clouds deduced from ground-based measurements.  J. Geophy. Res.,  102, 23829-23843.

Gossard, E.E., J.B. Snider, E.E. Clothiaux, B. Martner, J.S. Gibson, R.A. Kropfli and A.S. Frisch, 1997:  The potential of 8-mm radars for remotely sensing cloud drop size distributions.  J. Atmos. and Oceanic Technol.,  14, 76-87.

Kato, S., T.P. Ackerman, E.E. Clothiaux, J.H. Mather, G.G. Mace, M.L. Wesely, F. Murcray and  J. Michalsky, 1997: Uncertainties in modeled and measured clear-sky surface shortwave irradiances.  J. Geophy. Res.,  102, 25881-25898.

Mace, G.G., T.P. Ackerman, E.E. Clothiaux and B.A. Albrecht, 1997: A study of composite cirrus morphology using data from a 94-GHz radar and correlations with temperature and large-scale vertical motion.  J. Geophy. Res.,  102, 13581-13593.

Clothiaux, E.E., G.G. Mace, T.P. Ackerman, T.J. Kane, J.D. Spinhirne and V.S. Scott, 1998: An automated algorithm for detection of hydrometeor returns in micro pulse lidar data.  J. Atmos. and Oceanic Technol.,  15, 1035-1042.

Dong, X., T.P. Ackerman and E.E. Clothiaux, 1998: Parameterizations of the microphysical and radiative properties of boundary layer stratus from ground-based measurements.  J. Geophy. Res.,  103, 31681-31693.

Miller, M.A., M.P. Jensen and E.E. Clothiaux, 1998: Diurnal cloud and thermodynamic variations in the stratocumulus transition regime: a case study and conceptual model.  J. Atmos. Sci.,  55, 2294-2310.

Miller, M.A., J. Verlinde, C.V. Gilbert, G.J. Lehenbauer, J.S. Tongue and E.E. Clothiaux, 1998: Detection of nonprecipitating clouds with the WSR-88D: A theoretical and experimental survey of capabilities and limitations.  Weather and Forecasting,  13, 1046-1062.

Kato, S., T.P. Ackerman, J.H. Mather and E.E. Clothiaux, 1999: The k distribution method and correlated-k approximation for a shortwave radiative transfer model.  J. Quant. Spectros. Radiat. Transfer,  62, 109-121.

Clothiaux, E.E., K.P. Moran, B.E. Martner, T.P. Ackerman, G.G. Mace, T. Uttal, J.H. Mather, K.B. Widener, M.A. Miller and D.J. Rodriguez, 1999:  The Atmospheric Radiation Measurement program cloud radars: Operational modes.  J. Atmos. Oceanic Technol.,  16, 819-827.

Clothiaux, E.E., T.P. Ackerman, G.G. Mace, K.P. Moran, R.T. Marchand, M.A. Miller, and B.E. Martner, 2000:  Objective determination of cloud heights and radar reflectivities using a combination of active remote sensors at the ARM CART sites.  J. Appl. Meteor.,  39, 645-665.

Dong, X., P. Minnis, T.P. Ackerman, E.E. Clothiaux, G.G. Mace, C.N. Long, and J.C. Liljegren, 2000: A 25-month database of stratus cloud properties generated from ground-based measurements at the Atmospheric Radiation Measurement Southern Great Plains site.  J. Geophy. Res.,  105, 4529-4537.

Kato, S., M.H. Bergin, T.P. Ackerman, T.P. Charlock, E.E. Clothiaux, R.A. Ferrare, R.N. Halthore, N. Laulainen, G.G. Mace, J. Michalsky, and D.D. Turner, 2000: A comparison of the aerosol optical thickness derived from ground-based and airborne instruments.  J. Geophy. Res.,  105 (D11), 14701-14717.

Miles, N.L., J. Verlinde, and E.E. Clothiaux, 2000: Cloud droplet size distributions in low-level stratiform clouds.  J. Atmos. Sci.,  57, 295-311.