Dr. Jim Hudson

Research Professor Physics
4a696d2e487564736f6e406472692e656475
775-674-7020
CCN, cloud microphysics

Professional Interests

Dr. Hudson's research interests center on cloud and aerosol physics. He has made extensive field measurements of cloud condensation nuclei (CCN) in various parts of the world. He compares the CCN spectra with cloud droplet spectra to obtain a better fundamental understanding of cloud physics. He is also interested in differentiating between man made and natural CCN. This is important in determining anthropogenic effects on clouds which is important for global climatic considerations. Recent work has also involved physical characterization of CCN (volatility and the relationship between physical size and critical supersaturation) in order to understand sources. This and the interstitial and droplet residue measurements are now better done with the two matched DRI CCN spectrometers as has been done in two of his most recent aircraft research projects.

Research Areas

  • Atmospheric Chemistry
  • Climate Dynamics
  • Physical Meteorology

Education

DegreeYearInstitutionArea
Ph.D. 1976 University of Nevada, Reno Atmospheric Physics
M.S. 1970 University of Michigan Physics
B.S. 1968 Western Michigan University Physics and Mathematics

Publications & Presentations

2018

Hudson, J. G., Noble, S. R., Tabor, S. S. (2018). CCN spectral shape and stratus cloud and drizzle microphysics, J. Geophys. Res., Atmos., doi: 10.1029/2017JD027865 July 26, 2018, Accepted

2016

Hudson, J. G., Noble, S. R. (2016). Cloud Processing Effects on CCN and Cloud Microphysics, XVII International Conference on Clouds and Precipitation (ICCP): Manchester, England, July 25, 2016-July 29, 2016
Hudson, J. G., Noble, S. R. (2016). Bimodal CCN and Cloud Microphysics, AAAR Annual Meeting: Portland, OR, October 17, 2016-October 21, 2016
Hudson, J. G., Noble, S. R. (2016). Cloud-Processed Bimodal CCN and Effects on Cloud Microphysics, AGU Fall Meeting: San Francisco, CA, December 12, 2016-December 16, 2016
Noble, S. R., Hudson, J. G. (2016). Bimodal CCN and Cloud Microphysics, XVII International Conference on Clouds and Precipitation (ICCP): Manchester, England, July 25, 2016-July 29, 2016
Noble, S. R., Hudson, J. G. (2016). Stratus Cloud Radiative Effects from Cloud Processed Bimodal CCN Distributions, AGU Fall Meeting: San Francisco, CA, December 12, 2016-December 16, 2016

2015

Hudson, J. G., Noble, S. R. (2015). Cloud processing making bimodal CCN spectra, Presentation, 95th AMS Annual Meeting: Phoenix, AZ, January 4, 2015
Hudson, J. G., Noble, S. R. (2015). CCN Bimodality and Cloud Microphysics, ARM Science Team Meeting: Vienna, VA, March 16, 2015
Hudson, J. G., Noble, S. R., Tabor, S. S. (2015). Cloud supersaturations from CCN spectra Hoppel minima, J. Geophys. Res. Atmos., 120, 3436-3452, doi: :10.1002/2014JD022669
Hudson, J. G., Noble, S. R., Tabor, S. S. (2015). Cloud processed CCN affect cloud microphysics, 2015 AGU Fall Meeting: San Francisco, CA, December 12, 2015
Hudson, J. G., Noble, S. R., Tabor, S. S. (2015). Bimodal CCN spectra, International Union of Geodesy and Geophysics (IUGG): Prague, Czech Republic, June 22, 2015-July 2, 2015
Hudson, J. G., Noble, S. R., Tabor, S. S. (2015). Southern and Northern Hemisphere cloud processing, International Union of Geodesy and Geophysics (IUGG): Prague, Czech Republic, June 22, 2015-July 2, 2015
Noble, S. R., Hudson, J. G. (2015). Chemical and Physical Processing of CCN and their Effects on Clouds, 95th AMS Annual Meeting: Phoenix, AZ, January 5, 2015
Noble, S. R., Hudson, J. G. (2015). MODIS comparisons with northeastern Pacific in situ stratocumulus microphysics, J. Geophys. Res. Atmos., 120, 8332-8344, doi: 10.1002/2014JD022785
Noble, S. R., Hudson, J. G. (2015). Climate effects of cloud modified CCN-cloud interactions, 2015 AGU Fall Meeting: San Francisco, CA, December 12, 2015
Tabor, S. S., Hudson, J. G., Noble, S. R. (2015). Alterations of cloud microphysics due to cloud processed CCN: comparisons between surface aerosol and clouds, 2015 AGU Fall Meeting: San Francisco, CA, December 12, 2015

2014

Hudson, J. G., Noble, S. R. (2014). CCN and vertical velocity influences on droplet concentrations and supersaturations in clean and polluted stratus clouds, J. Atmos. Sci., 71, 312-331
Hudson, J. G., Noble, S. R. (2014). Reply to comment by Yangang Liu et al. on Cloud droplet spectral width relationship to CCN spectra and vertical velocity, Journal of Geophysical Research-Atmospheres, 119, (4), 1878-1882, doi: 10.1002/2013jd020559
Hudson, J. G., Noble, S. R. (2014). Low altitude summer/winter microphysics, dynamics and CCN spectra of northeastern Caribbean small cumuli, and comparisons with stratus, J. Geophys. Res., 119, 5445-5463, doi:10.1002/2013JD021442
Hudson, J. G., Noble, S. R. (2014). Cloud Supersaturations and CCN Spectra, EGU General Assembly 2014: Vienna, Austria, April 28, 2014-May 2, 2014
Hudson, J. G., Noble, S. R. (2014). Hoppel minima in detailed CCN spectra, AMS 14th Conference on Cloud Physics: Boston, MA, July 7, 2014
Hudson, J. G., Noble, S. R., Tabor, S. S. (2014). Cloud processing of CCN spectra, 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014
Koracin, D. R., Dorman, C. E., Lewis, J. M., Hudson, J. G., Wilcox, E.M., Torregrosa, A. (2014). Marine fog: A review, Atmos. Res., 143, 142-175
Noble, S. R., Hudson, J. G. (2014). Effects of cloud-processed CCN on warm clouds, 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014
Tabor, S. S., Noble, S. R., Hudson, J. G. (2014). CCN cloud processing interhemispheric comparisons, 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014
Tabor, S. S., Noble, S. R., Hudson, J. G. (2014). CCN, vertical velocity and cloud droplet concentration multiple regression analysis, AMS 14th Conference on Cloud Physics: Boston, MA, July 7, 2014

2013

Clarke, A. D., Freitag, S., Simpson, R., Hudson, J. G., Howell, S., Brekhovskikh, V., Campos, T., Kapustin, V., Zhou, J. (2013). Free troposphere as a major source of CCN in the equatorial pacific boundary layer: long-range transport and teleconnections, Atmos. Chem. Phys., 13, 7511-7529, doi: 10.5194/acp-13-7511-2013
Hudson, J. G., Noble, S. R. (2013). CCN spectra Hoppel minima and cloud supersaturation, Presentation at the 93rd American Meteorological Society Annual Meeting: Austin, TX, January 5, 2013
Hudson, J. G., Noble, S. R. (2013). Influences on droplet concentrations and supersaturations in stratus clouds, AIP Conference Proceedings 1527, pp. 710-713, ICNAA: Fort Collins, CO, June 24, 2013
Hudson, J. G., Noble, S. R. (2013). Vertical velocity-CCN correlations, AGU Fall Meeting: San Francisco, CA, December 9, 2013
Hudson, J. G., Noble, S. R. (2013). CCN and vertical velocity influences on droplet concentrations and supersaturations in clean and polluted stratus clouds, AAAR: Portland, OR, September 30, 2013-October 4, 2013
Meskhidze, N., Petters, M. D., Tsigaridis, T., Bates, T., O'Dowd, C., Reid, J., Lewis, E. R., Gantt, B., Anguelova, M. D., Bhave, P. V., Bird, J., Callaghan, A. H., Ceburnis, D., Chang, R., Clarke, A., de Leeuw, G., Deane, G., DeMott, P., Elliot, S., Facchini, M. C., Fairall, C. W., Hawkins, L., Hu, Y., Hudson, J. G., Johnson, M. S., Kaku, K. C., Keene, W. C., Kieber, D. J., Long, M. S., Martensson, M., Modini, R. L., Osburn, C. L., Prather, K. A., Pszenny, A., Rinaldi, M., Russell, L. M., Salter, M., Sayer, A. M., Smirnov, A., Suda, S. R., Toth, T. D., Worsnop, D. R., Wozniak, A., Zorn, S. R. (2013). Production mechanisms, number concentration, size distribution, chemical composition, and optical properties of sea spray aerosols, Atmos. Sci. Lett., 14, (4), 207-213, DOI: 10.1002/asl2.441
Noble, S. R., Hudson, J. G. (2013). Aerosol-vertical velocity coupling effects on stratus microphysics, AAAR: Portland, OR, September 30, 2013-October 4, 2013
Noble, S. R., Hudson, J. G. (2013). Cloud supersaturations and Hoppel minima, Proceedings, AIP Conference, 1527, pp. 706-709, doi:http://dx.doi.org/10.1063/1.4803368, ICNAA: Fort Collins, CO, June 24, 2013
Noble, S. R., Hudson, J. G. (2013). Refractory sea salt CCN spectra, AGU Fall Meeting: San Francisco, CA, December 9, 2013
Petzold, A., Formenti, P., Baumgardner, D., Bundke, U., Coe, H., Curtius, J., DeMott, P. J., Flagan, R. C., Fiebig, M., Hudson, J. G., McQuaid, J., Minikin, A., Roberts, G. C., Wang, J. (2013). In Situ Measurements of Aerosol Particles, In Airborne Measurements for Environmental Research: Methods and Instruments, 157, M. Wendisch, J.L. Brenguier, (Editors): Wiley

2012

Bandy, A., Faloona, I. C., Blomquist, B. W., Huebert, B. J., Clarke, A. D., Howell, S. G., Mauldin, R. L., Cantrell, C. A., Hudson, J. G., Heikes, B. G., Merrill, J. T., Wang, Y., O'Sullivan, D. W., Nadler, W., Davis, D. D. (2012). Pacific Atmospheric Sulfur Experiment (PASE): dynamics and chemistry of the south Pacific tropical trade wind regime, J. Atmos. Chem., 68, 5-25
Hudson, J. G., Noble, S. R. (2012). Cloud supersaturations and the Hoppel minimum, AGU 2012 Fall Meeting: San Francisco, CA, December 3, 2012
Hudson, J. G., Noble, S. R., Jha, V. (2012). Cloud droplet spectral width relationship to CCN spectra and vertical velocity, J. Geophys. Res.-Atmospheres, 117, (D11211), doi: 10.1029/2012JD017546
Hudson, J. G., Noble, S. R., Jha, V. (2012). Sea salt CCN spectra, Presentation at AMS 92nd Annual Meeting: New Orleans, LA, January 22, 2012
Hudson, J. G., Noble, S. R., Jha, V. (2012). Effect of CCN spectra on droplet spectral width, 16th International Conference on Clouds and Precipitation (ICCP): Leipzig, Germany, July 30, 2012-August 3, 2012
Noble, S. R., Hudson, J. G. (2012). Refractory sea salt CCN spectra, AGU Fall Meeting: San Francisco, CA, December 3, 2012

2011

Hudson, J. G., Jha, V., Noble, S. R. (2011). Drizzle correlations with giant nuclei, Geophys. Res. Lett., 38, doi:10.1029/2010GL046207

2010

Hudson, J. G., Noble, S. R., Jha, V. (2010). Comparisons of CCN with supercooled clouds, J. Atmos. Sci., 67, (9), 3006-3018
Hudson, J. G., Noble, S. R., Jha, V. (2010). Stratus cloud supersaturations, Geophys Res Lett, 37, doi:10.1029/2010GL045197
Pratt, K. A., Heymsfield, A. J., Twohy, C. H., Murphy, S. M., DeMott, P. J., Hudson, J. G., Subramanian, R., Wang, Z., Seinfeld, J. H., Prather, K. A. (2010). In-situ chemical characterization of aged biomass burning aerosols impacting cold wave clouds, J. Atmos. Sci., 67, (8), 2451-2468

2009

Hudson, J. G., Noble, S. R. (2009). CCN and cloud droplet concentrations at a remote ocean site, Geophys Res Lett, 36, doi:10.1029/2009GL038465
Hudson, J. G., Noble, S. R., Jha, V., Mishra, S. (2009). Correlations of small cumuli droplet and drizzle drop concentrations with cloud condensation nuclei concentrations, J Geophys Res, 114, doi:10.1029/2008JD010581

2008

Lasher-Trapp, S., Anderson-Bereznicki, S., Shackelford, A., Twohy, C. H., Hudson, J. G. (2008). An investigation of the influence of droplet number concentration and giant aerosol particles upon supercooled large drop formation in wintertime stratiform clouds, J. Appl. Meteorol. & Climatol, 47, (10), 2659-2678, doi: 10.1175/2008JAMC1807.1
Rosenfeld, D., Woodley, W. L., Axisa, D., Freud, E., Hudson, J. G., Givati, A. (2008). Aircraft measurements of the impacts of pollution aerosols on clouds and precipitation over the Sierra Nevada, J. Geophys. Res., 113, (D15203), doi: 10.1029/2007JD009544

2007

Hudson, J. G. (2007). Variability of the relationship between particle size and cloud-nucleating ability, Geophys. Res. Let., 34, (8 5 L08801), doi: 10.1029/2006GL028850
Hudson, J. G., Mishra, S. (2007). Relationships between CCN and cloud microphysics variations in clean maritime air, Geophys. Res. Lett., 34, (16 6 L16804), doi: 10.1029/2007GL030044

2006

Chylek, P., Dubey, M. K., Lohmann, Y., Ramanathan, V., Kaufman, Y., Lesins, G., Hudson, J. G., Altmann, G., Olsen, S. (2006). Aerosol indirect effect over Indian Ocean, Geophys Revs Let, 33, (L06806), DOI 10.1029/2005GL025397
Gasparini, R., Collins, D. R., Andrews, E., Sheridan, P. J., Ogren, J. A., Hudson, J. G. (2006). Coupling aerosol size distributions and size-resolved hygroscopicity to predict humidity-dependent optical properties and CCN spectra, J Geophys Res, 111, (D05S10), doi:101029/2005JD006092

2005

Yum, S. S., Hudson, J. G. (2005). Adiabatic predictions and observations of cloud droplet spectral broadness, Atmos Res, 73, 203-223
Yum, S. S., Hudson, J. G., Song, K. Y., Choi, B. (2005). Springtime cloud condensation nuclei concentrations on the west coast of Korea, Geophys Res Let, 32, doi:10.1029/2005GL022641

2004

Yum, S. S., Hudson, J. G. (2004). Wintertime/summertime contrasts of cloud condensation nuclei and cloud microphysics over the Southern Ocean, J Geophys Res, 109, doi:10.1029/2003JD003864

2002

Hudson, J. G., Yum, S. S. (2002). Cloud condensation nuclei spectra and polluted and clean clouds over the Indian Ocean, J. Geophys. Res., 107, (D19)
Wylie, D., Hudson, J. G. (2002). Effects of Long Range Transport and Clouds on Cloud Condensation Nuclei in the Springtime Arctic, J. Geophys. Res., 107, (D16), doi: 10.1029/2001JD000759
Yum, S. S., Hudson, J. G. (2002). Maritime/continental microphysical contrasts in stratus, Tellus, 54B, 61-73

2001

Ghan, S. J., Easter, R. C., Hudson, J. G., Breon, F. M. (2001). Evaluation of aerosol indirect radiative forcing in MIRAGE, J. Geophys. Res., 106, 5317-5334
Hudson, J. G., Yum, S. S. (2001). Maritime-continental drizzle contrasts in small cumuli, J. Atmos. Sci., 58, 915-926
Twohy, C. H., Hudson, J. G., Anderson, J. R., Durlak, S. K., Yum, S. S., Baumgardner, D. (2001). Characteristics of cloud nucleating aerosols in the Indian Ocean region, J. Geophys. Res., 106, 28699-28710
Yum, S. S., Hudson, J. G. (2001). Vertical distributions of cloud condensation nuclei spectra over the springtime Arctic Ocean, J. Geophys. Res., 106, 15045-15052
Yum, S. S., Hudson, J. G. (2001). Maritime/continental microphysical contrasts in stratus, Tellus, 54, (B), 61-73
Yum, S. S., Hudson, J. G. (2001). Microphysical relationships in warm clouds, Atmos. Res., 57, 81-104

2000

Durkee, P. A., Noone, K. J., Ferek, R. J., Johnson, D. W., Taylor, J. P., Garrett, T. J., Hobbs, P. V., Hudson, J. G., Bretherton, C. S., Innis, G., Frick, G. M., Hoppel, W. A., O'Dowd, D. C., Russell, L. M., Gasparovic, R. F., Nielsen, K. E., Tessmer, S. A., Ostrom, E., Osborne, S. R., Flagan, R. C., Seinfeld, J. H., Rand, H. (2000). The impact of ship-produced aerosols on the microstructure and albedo of warm marine stratocumulus clouds: A test of MAST hypotheses 1i and 1ii, J. Atmos. Sci., 57, (16), 2554-2569
Hudson, J. G., Garrett, T. J., Hobbs, P. V., Strader, S. R., Xie, Y. X., Yum, S. S. (2000). Cloud condensation nuclei and ship track clouds, J. Atmos. Sci., 57, 2696-2706
Noone, K. J., Johnson, D. W., Taylor, J. P., Ferek, J. R., Garrett, T. J., Hobbs, P. V., Durkee, P. A., Nielsen, K. E., Ostrom, E., O'Dowd, C. D., Smith, M. H., Russell, L. M., Flagan, R. C., Seinfeld, J. H., De Bock, L., Van Grieken, R. E., Hudson, J. G., Brooks, I., Gasparovic, R. F., Pockalny, R. A. (2000). A case study of ship track formation in a polluted marine boundary layer, J. Atmos. Sci., 57, (16), 2748-2764
Noone, K. J., Ostrom, E., Ferek, R. J., Garrett, T. J., Hobbs, P. V., Johnson, D. W., Taylor, J. P., Russell, L. M., Flagan, R. C., Seinfeld, J. H., O'Dowd, C. D., Smith, M. H., Durkee, P. A., Nielsen, K. E., Hudson, J. G., Pockalny, R. A., De Bock, L., van Grieken, R. E., Gasparovic, R. F., Brooks, I. (2000). A case study of ships forming and not forming tracks in moderately polluted clouds, J. Atmos. Sci., 57, (16), 2729-2747, doi: 10.1175/1520-0469(2000)057<2729:ACSOSF>2.0.CO;2

1998

Hudson, J. G., Xie, Y. (1998). Cloud condensation nuclei measurements in the high troposphere and in jet aircraft exhaust, Geophys Res. Lett., 25, 1395-1398
Hudson, J. G., Xie, Y., Yum, S. S. (1998). Vertical distributions of cloud condensation nuclei spectra over the summertime Southern Ocean, J. Geophys. Res., 103, (D13), 16609-16624
Yum, S. S., Hudson, J. G., Xie, Y. (1998). Comparisons of cloud microphysics with cloud condensation nuclei spectra over the summertime Southern Ocean, J. Geophys. Res., 103, 16625-16636

1991

Rogers, C. F., Hudson, J. G., Zielinska, B. K., Tanner, R., Hallett, J., Watson, J. G. (1991). Cloud condensation nuclei from biomass burning, In Global Biomass Burning: Atmospheric, Climatic, and Biospheric Implications, 431-438, MIT Press: Cambridge, MA

1982

Bowen, J. L., Hoffer, T. E., Reale, T., Schorran, D., Brown, R., Hudson, J. G., Rogers, C. F., Yates, M. (1982). Visibility report, Desert Research Institute: Reno, NV

1981

Egami, R. T., Hudson, J. G. (1981). Aerosol measurements at the southeast Las Vegas valley during November and December 1980, Desert Research Institute: Reno, NV
Egami, R. T., Hudson, J. G. (1981). Analysis of marine fog and boundary layer aerosol data, Desert Research Institute: Reno, NV

Authors

Abstract

 

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