Oregon State University

College of Earth, Ocean, and Atmospheric Sciences

Directory of People

Larry O'Neill

Larry O'Neill photo
Assistant Professor
Discipline: Physics of Oceans and Atmospheres
Office: Burt 332D
Phone: 541-737-6396
Fax: 541-737-2064
Email: loneill@coas.oregonstate.edu


Air-sea interactions, satellite meteorology and oceanography, atmospheric boundary layer and ocean mixed layer dynamics.

Current Research

Currently I am working on characterizing the divergence variability from scatterometer observations. I also am working with colleagues at the Naval Research Laboratory to use numerical weather prediction models to better understand what physical processes shape the observed divergence variability. We are also continuing research into understanding how sea surface temperature variability affects the surface wind field, including the divergence field. Finally, I am also continuing work to understand how clouds and rainfall are affected by variability in the near-surface divergence field.


Ph.D. Oceanography, Oregon State University, 2007
B.S. Atmospheric Sciences, University of California at Davis, 2000


OC 678 Satellite Oceanography/Ocean Remote Sensing

OEAS 530 Fluid Earth

Graduate Students

Briana Phillips

Science Working Groups

  • NASA's Ocean Vector Winds Science Team
  • Jet Propulsion Laboratory's PO.DAAC Users Working Group
  • American Meteorological Society Committee on Air-Sea Interactions
  • NASA's Ocean Surface Topography Science Team


O'Neill, L. W. , T. Haack, D. B. Chelton, and E. Skyllingstad, 2017: The Gulf Stream Convergence Zone in the time-mean winds. Journal of Atmospheric Sciences, Accepted.

Hong, X., C. Reynolds, J. Doyle, P. May, and L.  O'Neill, 2017: Assessment of Upper-Ocean Variability and the Madden-Julian Oscillation in Extended-Range Air-Ocean Coupled Mesoscale SimulationsDyn. Atmos. Oc., 78, 89-105.

Wentz, F. J., L. Ricciardulli, E. Rodriguez, B. Stiles, M. Bourassa, D. Long, R. Hoffman, A. Stoffelen, A. Verhoef, L. O’Neill, T. Farrar, D. Vandemark, A. Fore, S. Hristova-Veleva, J. Turk, R. Gaston, D. Tyler, 2017: Evaluating and Extending the Ocean Wind Climate Data Record. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 99, 1–21.

O'Neill, L. W., T. Haack, and T. Durland, 2015: Estimation of time-averaged surface divergence and vorticity from satellite ocean vector winds. Journal of Climate, 28, 7596–7620.

Gaube, P., D. B. Chelton, R. M. Samelson, M. G. Schlax, and L. W. O’Neill, 2015: Satellite Observations of Mesoscale Eddy-Induced Ekman Pumping. Journal of Physical Oceanography, 45, 104–132.

Perlin, N., S. P. de Szoeke, D. B. Chelton, R. M. Samelson, E. D. Skyllingstad, and L. W. O'Neill, 2014: Modeling the Atmospheric Boundary Layer Response to Mesoscale Sea Surface Temperature Perturbations. Monthly Weather Review, 142, 4284-4307.

O'Neill, L. W., 2014: Comparison of surface ocean vector wind sampling from TAO buoys and satellite scatterometers. Report to the TPOS 2020 Committee.

Lindstrom, E., Bourassa, M., Chelton, D., Corlett, G., Durland, T., Farrar, T., Janssen, P., Lagerloef, G., Lee, T., Minnett, P., O’Neill, L., and Willis, J., 2014: Satellite Views of the Tropical Pacific. TPOS 2020 Collection.

Cronin, M. F., Bourassa, M., Clayson, C., Edson, J., Fairall, C., Feely, R., Kumar, K., Large, W., Mathis, J., McPhaden, M., O’Neill, L., Pinker, R., Takahashi, K., Tomita, H., Weller, R., Yu, L., and Zhang, C., 2014: Wind stress and air-sea fluxes observations: status, implementation and gaps. TPOS 2020 Collection.

Hong, X., S. Wang, T. Holt, P. Martin, and L. O'Neill, 2013: Modulation of the Sea-Surface Temperature in the Southeast Pacific by the Atmospheric Low-Level Coastal Jet. J. Geophys. Res., 118, 1-20.

Painemal, D., P. Minnis, and L. W. O'Neill, 2013: The diurnal cycle of cloud top height and cloud cover over the Southeast Pacific as observed by GOES-10. J. Atmos. Sci., 70, 2393–2408.

Painemal, D., P. Minnis, J. K. Ayers, and L. W. O'Neill, 2012: GOES-10 microphysical retrievals in marine warm clouds: Multi-instrument validation and daytime cycle over the southeast Pacific. J. Geophys. Res., 117, D19212, doi:10.1029/2012JD017822.

O'Neill, L. W., D. B. Chelton, and S. K. Esbensen, 2012: Covariability of surface wind and stress responses to sea-surface temperature fronts. J. Climate, 25, 5916–5942.

O'Neill, L. W., 2012: Wind speed and stability effects on the coupling between surface wind stress and SST observed from buoys and satellite. J. Climate, 26, 1544-1569.

O'Neill, L. W., S. Wang, and Q. Jiang, 2011: Variability of the diurnal cycle of liquid water path over the southeast subtropical Pacific. Atmos. Chem. Phys. Disc., 11, 31159-31206.

Hong, X., C. Bishop, T. Holt, and L. O'Neill, 2011: Impact of sea surface temperature uncertainty on the western North Pacific subtropical high (WNPSH) and rainfall. Wea. Forecasting, 26, 371-387.

Wang, S., L. O'Neill, Q. Jiang, X. Hong, H. Jin, S. de Szoeke, W. Thompson, and X. Zheng, 2011: A regional real-time forecast of marine boundary layers during VOCALS-REx. Atmos. Chem. Phys., 465-477.

Jiang, Q., S. Wang, and L. W. O'Neill, 2010: Some insights into the characteristics and dynamics of the Chilean low-level coastal jet. Mon. Wea. Rev., 138, 3185-3206.

O'Neill, L. W., S. K. Esbensen, N. Thum, R. M. Samelson, and D. B. Chelton, 2010:  Dynamical analysis of the boundary layer and surface wind responses to mesoscale SST perturbations. J. Climate, 23, 559-581.

O'Neill, L. W., D. B. Chelton, and S. K. Esbensen, 2010: The effects of SST-induced wind speed and direction gradients on mid-latitude surface vorticity and divergence. J. Climate, 23, 255-281.

Song, Q., D. B. Chelton, S. K. Esbensen, N. Thum, and L. W. O'Neill, 2009: Coupling between sea surface temperature and low-level winds in mesoscale numerical models. J. Climate, 22, 146-164.

Small, R. J., S. de Szoeke, S. P. Xie, L. O'Neill, H. Seo, Q. Song, P. Cornillon, M. Spall, and S. Minobe, 2008: Air-sea interaction over ocean fronts and eddies. Dyn. Atmos. Oceans, 45, 274-319, doi:10.1016/j.dynatmoce.2008.01.001.

Samelson, R. M., E. D. Skyllingstad, D. B. Chelton, S. K. Esbensen, L. W. O'Neill, and N. Thum, 2006: A note on the coupling of wind stress and sea surface temperature. J. Climate, 19, 1557-1566.

O'Neill, L. W., D. B. Chelton, S. K. Esbensen, and F. J. Wentz, 2005: High-resolution satellite measurements of the atmospheric boundary layer response to SST variations along the Agulhas Return Current. J. Climate, 18, 2706-2723.

O'Neill, L. W., D. B. Chelton, S. K. Esbensen, 2003: Observations of SST-induced perturbations of the wind stress fields over the Southern Ocean on seasonal time-scales. J. Climate, 16, 2340-2354.

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