Research Statement

My research interests include numerical simulation of cloud systems, with particular emphasis on the interactions between large-scale and cloud-scale processes, as well as turbulence and mixing in clouds and the boundary layer. I am also interested in time-lapse photography of clouds, and would like to find a collaborator with an interest in producing compilations for educational use.

Research Groups

  • Adam Kochanski, Research Professor. 07/01/2008 - present.
  • Mary Ann Jenkins, Research Professor. 08/01/1999 - present.

Presentations

  • Krueger, Steven K., 2018: An Economical Approach for Simulating Droplet Microphysics in Turbulent Clouds: Bridging the DNS-LES Gap. Talk presented at the International Workshop on Cloud Dynamics, Micro physics, and Small-Scale Simulation, Indian Institute of Tropical Meteorology, Pune, India, 13-17 August 2018. Invited Talk/Keynote, Presented, 08/14/2018.
    https://www.tropmet.res.in/iwcms2018/
  • Krueger, S., W. Cantrell, D. Niedermeier, R. Shaw, and F. Stratmann, 2017: An economical model for simulating droplet spectrum evolution in turbulent cloud chambers and wind tunnels. Talk presented at 70th Annual Meeting of the APS Division of Fluid Dynamics, Denver, Colorado, 19–21 November 2017. Conference Paper, Presented, 11/2017.
  • Niedermeier, D., J. Voigtländer, H. Siebert, N. Desai, R. Shaw, K. Chang, J. Schumacher, S. Krueger, and F. Stratmann, 2017: LACIS-T - A moist air wind tunnel for investigating the interactions between cloud microphysics and turbulence. Talk presented (by Niedermeier) at 70th Annual Meeting of the APS Division of Fluid Dynamics, Denver, Colorado, 19–21 November 2017. Conference Paper, Presented, 11/2017.
  • Kerstein, A., and S. Krueger, 2017: Enhancement of coalescence in turbulent clouds. Talk presented (by Kerstein) at 70th Annual Meeting of the APS Division of Fluid Dynamics, Denver, Colorado, 19–21 November 2017. Conference Paper, Presented, 11/2017.
  • Krueger, Steven K., 2017: The Effects of Entrainment and Mixing on Droplet Size Distributions: Bridging the DNS-LES Gap. EPSSI (Earth, Planetary, and Space Sciences Institute) Seminar, presented at Michigan Technological University, Houghton, MI, 2 October 2017. Invited Talk/Keynote, Presented, 10/02/2017.
  • Krueger, Steven K., 2017: The Effects of Entrainment and Mixing on Droplet Size Distributions: Bridging the DNS-LES Gap. Seminar presented at Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany, 19 July 2017. Invited Talk/Keynote, Presented, 07/19/2017.
  • Glenn I. B, and S. K Krueger, 2017: When Good Connections Matter: Updraft Merging in Organized Tropical Deep Convection. Talk presented (by Glenn) at The Future of Cumulus Parametrization Workshop, Delft University of Technology, Delft, The Netherlands, 10-14 July 2017. Conference Paper, Presented, 07/2017.
  • Krueger, S., P. K. Thakur, L. G. H. Oh, and P. H. Austin, 2017: Coupling a statistical cloud scheme to a mass-flux convection scheme. Poster presented at The Future of Cumulus Parametrisation Workshop, Delft University of Technology, Delft, The Netherlands, 10-14 July 2017. Poster, Presented, 07/2017.
  • Krueger, S. K., 2017: An Economical Approach for Simulating the Effects of Entrainment and Mixing on Droplet Size Distributions in Turbulent Clouds. Talk presented at International Workshop on Cloud Microphysics - Turbulence Interaction, Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany, 28 February – 1 March 2017. Conference Paper, Presented, 03/01/2017.
  • Glenn, I. B., and S. K. Krueger, 2016: Cold pool organization and the merging of convective updrafts in a Large Eddy Simulation: Abstract A53A-0256 presented at 2016 Fall Meeting, AGU, San Francisco, Calif., 12-16 Dec. Poster, Presented, 12/16/2016.
  • Krueger, Steven K, 2016: Representing the Effects of Entrainment and Mixing on Warm-cloud Microphysics in Large-Eddy Simulations. Abstract A33I-0374 presented at 2016 Fall Meeting, AGU, San Francisco, Calif., 12-16 Dec. Poster, Presented, 12/14/2016.
  • Mallia, Derek Vincent, Adam Kochanski, Dien Wu, Shawn P Urbanski, Steven K Krueger, and John C Lin, 2016: Integrating wildfire plume rises within atmospheric transport models. Abstract A31I-0175 presented at 2016 Fall Meeting, AGU, San Francisco, Calif., 12-16 Dec. Poster, Presented, 12/14/2016.
  • Krueger, Steven K, Shrinivas Moorthi, David A Randall, Robert Pincus, Peter Bogenschutz, Alexei Belochitski, Minoru Chikira, Donald A. Dazlich, Dustin J Swales, Prabhat Kumar Thakur, and Fanglin Yang, 2016: A CPT for Improving Turbulence and Cloud Processes in the NCEP Global Models. Abstract A13L-06 presented at 2016 Fall Meeting, AGU, San Francisco, Calif., 12-16 Dec. Invited Talk/Keynote, Presented, 12/12/2016.
  • Krueger, S. K., 2016: The Effects of Entrainment and Mixing on Droplet Size Distributions: Bridging the DNS-LES Gap. Talk presented at the 17th International Conference on Clouds and Precipitation, Manchester, U.K., 25-29 July 2016. Conference Paper, Presented, 07/2016.
  • Krueger, S., A. Lesage, and M. Khairoutdinov, 2016: Sensitivity of Cloud Feedbacks to Turbulence Closure, Microphysics Scheme, and Grid Size in Cloud-Resolving RCE Simulations. Poster presented at the 17th International Conference on Clouds and Precipitation, Manchester, U.K., 25-29 July 2016. Poster, Presented, 07/2016.
  • Kochanski, A., and S. Krueger, 2016: Numerical Simulation of Convective Cold Pools Observed during the DYNAMO Field Campaign. Poster presented at the 17th International Conference on Clouds and Precipitation, Manchester, U.K., 25-29 July 2016. Poster, Presented, 07/2016.
  • Glenn, I., and S. Krueger, 2016: The role of updraft merging in the development of deep convection. Poster presented at the 17th International Conference on Clouds and Precipitation, Manchester, U.K., 25-29 July 2016. Poster, Presented, 07/2016.
  • Krueger, S., and M. A. Jenkins, 2016: Ground-based Retrieval of Entrainment Rates in Stratocumulus-topped Boundary Layers. Talk presented at 22nd Symposium on Boundary Layers and Turbulence, American Meteorological Society, Salt Lake City, Utah, 20-24 June, 2016. Conference Paper, Presented, 06/2016.
  • Krueger, S., A. Lesage, and M. Khairoutdinov, 2016: Sensitivity of Cloud Feedbacks to Turbulence Closure, Microphysics Scheme, and Grid Size in Cloud-Resolving RCE Simulations. Poster presented at the 2015 ARM/ASR Joint User Facility P.I. Meeting, Tysons Corner, VA, 2-5 May. Poster, Presented, 05/2016.
  • Krueger, S. K., I. B. Glenn, 2016: Merging cumulus updrafts. Poster presented at the International Conference on Understanding Clouds and Precipitation, Berlin, Germany, 15-19 February. Poster, Presented, 02/2016.
  • Krueger, S., and Glenn, I., 2015: Merging Cumulus Updrafts. Abstract A51F-0121 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec. Poster, Presented, 12/18/2015.
  • Krueger, S.K., A. T. Lesage, and M. Khairoutdinov, 2015: Sensitivity of cloud-resolving RCE simulations to SST, horizontal grid size, and turbulence closure. Talk presented at CFMIP - Cloud Feedback Model Intercomparison Project Meeting on Cloud Processes and Cloud Feedbacks, June 8-11, Asilomar Conference Grounds, Pacific Grove, CA . Conference Paper, Presented, 06/10/2015.
  • Krueger, S., 2015: Sensitivity of cloud-resolving RCE simulations to SST, horizontal grid size, and turbulence closure. Seminar presented at NOAA Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey. Invited Talk/Keynote, Presented, 05/21/2015.
  • Krueger, S., A. Lesage, and P. Bogenschutz, 2015: Simulating an Evolving Mixed-Phase Cloud-topped Boundary Layer with SHOC (Simplified Higher-Order Closure). Poster presented at the 2015 ARM/ASR Joint User Facility P.I. Meeting, Tysons  Corner, VA,   March  16--19. Poster, Presented, 03/2015.
  • Krueger, S., A. Lesage, and P. Bogenschutz, 2014: Simulating an evolving mixed-phase cloud-topped boundary layer with SHOC (simplified higher-order closure). Talk presented at WGNE/GASS Grey Zone Workshop, Max Planck Institute for Meteorology, Hamburg, Germany, December 1-3, 2014. Conference Paper, Presented, 12/2014.
  • Glenn, I., and S. Krueger, 2014: Study of Detrainment from Deep Convection. Abstract A11N-08A presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec. Conference Paper, Presented, 12/2014.
  • Krueger, S., A. Lesage, and P. Bogenschutz, 2014: Simulating an Evolving Mixed-Phase Cloud-topped Boundary Layer with SHOC (Simplified Higher-Order Closure). Abstract A13K-3323 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec. Conference Paper, Presented, 12/2014.
  • Krueger, S., 2014: Parameterizing the effects of leads upon the atmosphere and surface fluxes of the Arctic Ocean. Talk presented at World Weather Open Science Conference 2014, Montreal, Canada, August 16-21, 2014. Conference Paper, Presented, 08/2014.
  • Krueger, S., 2014: An economical, scale-aware PDF-based turbulence closure model. Talk presented at World Weather Open Science Conference 2014, Montreal, Canada, August 16-21, 2014. Conference Paper, Presented, 08/2014.
  • Krueger, S. K., and A. R. Kerstein, 2014: Effects of Entrainment and Mixing on Droplet Size Distributions: Bridging the DNS-LES Gap. Talk presented at 14th Conference on Cloud Physics, American Meteorological Society‚ Boston, MA, 7-11 July 2014. Conference Paper, Presented, 07/2014.
  • Krueger, S., and P. Bogenschutz, 2014: Simulating an Evolving Cloud-topped Boundary Layer during a Cold-Air Outbreak over the North Atlantic with SHOC (Simplified Higher-Order Closure). Talk presented at 21st Symposium on Boundary Layers and Turbulence, American Meteorological Society, Leeds, U.K., 9-13 June 2014. Conference Paper, Presented, 06/2014.
  • Krueger, S., 2013: Challenges and State of the Art in Cloud Modeling. Talk presented at the Workshop on Atmospheric Modeling at LES Scales: Opportunities and Challenges, Argonne National Laboratory, Lemont, IL. Invited Talk/Keynote, Presented, 09/04/2013.
  • Krueger, S., 2012: An economical scale-aware parameterization for representing subgrid-scale clouds and turbulence in cloud-resolving models and global models. Seminar presented as part of the Climate Test Bed (CTB) Seminar Series, NOAA Center for Weather and Climate Prediction, College Park, MD, Nov 2, 2012. Invited Talk/Keynote, Presented, 11/02/2012.
  • Krueger, S. K., 2012: Multi-scale Modeling: From Droplets to Clouds. Seminar presented as part of the Berkeley Atmospheric Sciences Center seminar, UC Berkeley, Berkeley, CA, Sep 18, 2012. Invited Talk/Keynote, Presented, 09/18/2012.
  • Krueger, S. K., and A. R. Kerstein, 2012: A Novel Approach for Simulating Droplet Microphysics in Turbulent Clouds. Talk presented at the Geophysical Turbulence Program (GTP) workshop on "Multiphase Turbulent Flows in the Atmosphere and Ocean", NCAR, Boulder, CO, August 13 - 17, 2012. Conference Paper, Presented, 08/15/2012.
  • Krueger, S. K., and A. R. Kerstein, 2012: A Novel Approach for Simulating Droplet Microphysics in Turbulent Clouds. Talk presented at the 16th International Conference on Clouds and Precipitation, Leipzig, Germany, July 30 - August 3, 2012. Conference Paper, Presented, 07/30/2012.
  • Krueger, S., 2012: A Novel Approach for Simulating Droplet Microphysics in Entraining Clouds. Seminar presented as part of AOS 270 Seminar Series, Department of Atmospheric & Oceanic Sciences, UCLA, Los Angeles, CA, Apr 25, 2012. Invited Talk/Keynote, Presented, 04/25/2012.
  • Krueger, S., and I. Glenn, 2012: Mass Flux, Vertical Velocity, and Entrainment in the Giga-LES. Talk presented at the Workshop on Convection, Water Vapor, and Climate, Harvard University, Cambridge, MA, March 27-29, 2012. Invited Talk/Keynote, Presented, 03/28/2012.

Geographical Regions of Interest

  • Netherlands
  • Spain
  • Svalbard and Jan Mayen Islands
  • United Kingdom of Great Britain and Northern Ireland

Publications

  • Chandra, A. S. & P. Zuidema, S. Krueger, A. Kochanski, S. P. de Szoeke, and J. Zhang (2018). Moisture distributions in tropical cold pools from equatorial Indian Ocean observations and cloud-resolving simulations. J. Geophys. Res. Atmos. Published, 09/2018.
    https://dx.doi.org/10.1029/2018JD028634
  • Garrett, T. & S. Krueger, and I. Glenn (2018). Thermodynamic constraints on the size distributions of tropical clouds. J. Geophys. Res. Atmos. Published, 07/2018.
    https://dx.doi.org/10.1029/2018JD028803
  • Krueger, S. K. & A. R. Kerstein (2018). An economical model for simulating turbulence enhancement of droplet collisions and coalescence. J. Adv. Model. Earth Syst.,. Published, 05/2018.
    https://dx.doi.org/10.1029/2017MS001240
  • Lu, C., & Y. Liu, B. Zhu, S. S. Yum, S. K. Krueger, Y. Qiu, S. Niu, S. Luo (2018). On which microphysical time scales to use in studies of entrainment-mixing mechanisms in clouds. J. Geophys. Res. Atmos. Vol. 123, 3740–3756. Published, 03/2018.
    https://dx.doi.org/10.1002/2017JD027985
  • Pu, Z. & C. Lin, X. Dong, S. Krueger (2018). Sensitivity of numerical simulations of a mesoscale convective system to ice hydrometeors in bulk microphysical parameterization. Pure and Applied Geophysics. Published, 01/2018.
    https://dx.doi.org/10.1007/s00024-018-1787-z
  • Glenn I.B, and S.K Krueger (2017), Connections matter: Updraft merging in organized tropical deep convection, Geophys. Res. Lett., 44, doi:10.1002/2017GL074162. Published, 06/23/2017.
    http://dx.doi.org/10.1002/2017GL074162
  • Wood, R., M. Jensen, J. Wang, C. Bretherton, S. Burrows, A. Del Genio, A. Fridlind, S. Ghan, V. Ghate, P. Kollias, S. Krueger, R. McGraw, M. Miller, D. Painemal, L. Russell, S. Yuter, and P. Zuidema, 2016: Planning the Next Decade of Coordinated Research to Better Understand and Simulate Marine Low Clouds. Bull. Amer. Meteor. Soc., 97, 1699–1702, doi: 10.1175/BAMS-D-16-0160.1. Published, 09/2016.
    https://dx.doi.org/10.1175/BAMS-D-16-0160.1
  • Krueger, S. K., A. M. Fridlind, and H. Morrison, 2016: Cloud resolving modeling: The ARM and GCSS story. The Atmospheric Radiation Measurement Program: The First 20 Years, D. D. Turner and R. G. Ellingson, eds., American Meteorological Society, Boston, 25.1–25.16, doi: 10.1175/AMSMONOGRAPHS-D-15-0047.1. Published, 04/2016.
    https://dx.doi.org/10.1175/AMSMONOGRAPHS-D-15-0047...
  • T ̈olle, M., and S. Krueger, 2014: Effects of Entrainment and Mixing on Droplet Size Distributions in Warm Cumulus Clouds. J. Adv. Model. Earth Syst., 6, 281-299, doi:10.1002/2012MS000209. Published, 04/30/2014.
    http://dx.doi.org/10.1002/2012MS000209
  • Glenn, I., and S. Krueger, 2014: Downdrafts in the near cloud environment of deep convective updrafts. J. Adv. Model. Earth Syst., 6, 1-7. doi/10.1002/ 2013MS000261. Published, 01/2014.
    http://dx.doi.org/10.1002/2013MS000261
  • Gerber, H., G. Frick, S. Malinowski, H. Jonsson, D. Khelif, and S. Krueger, 2013: Entrainment rates and microphysics in POST stratocumulus. J. Geophy. Res. Atmos., 118, 12,094-12,109. Published, 11/2013.
    http://dx.doi.org/10.1002/jgrd.50878
  • Giangrande, S. E., S. Collis, J. Straka, A. Protat, C. Williams, and S. Krueger, 2013: A summary of convective core vertical velocity properties using ARM UHF wind profilers in Oklahoma. J. Appl. Meteorol Clim., 52, 2278-2295. Published, 10/2013.
  • Kochanski, A. K., Jenkins, M. A., Mandel, J., Beezley, J. D., Clements, C. B., and Krueger, S., 2013: Evaluation of WRF-SFIRE performance with field observations from the FireFlux experiment, Geosci. Model Dev., 6, 1109-1126, doi:10.5194/gmd-6-1109-2013, 2013. Published, 08/2013.
  • Kochanski, A., M.A. Jenkins, R. Sun, S. Krueger, S. Abedi, and J. Charney, 2013: The importance of low-level environmental vertical wind shear to wildfire propagation: Proof of concept. J. Geophy. Res. Atmos., 118, 8238--8252. Published, 08/2013.
  • Wagner,T. J. , D. D. Turner, L. K. Berg, and S. K. Krueger, 2013: Ground-based remote retrievals of cumulus entrainment rates. J. Atmos. Ocean. Tech., 30, 1460-1471. doi:10.1175/JTECH-D-12-00187.1. Published, 07/2013.
  • Bogenschutz, P. A., and S. K. Krueger, 2013: A simplified PDF parameterization of subgrid- scale clouds and turbulence for cloud-resolving models. J. Adv. Model. Earth Syst., 5,195-211. doi:10.1002/jame.20018. Published, 04/2013.
    http://dx.doi.org/10.1002/jame.20018
  • Kochanski, A.K., M.A. Jenkins, S.K. Krueger, J. Mandel, and J.D. Beezley, 2013: Real- time simulation of 2007 Santa Ana fires. Forest Ecology and Management, 294, 136-149. doi:10.1016/j.foreco.2012.12.014. Published, 04/2013.
  • Lu, C., Y. Liu, S. Niu, S. K. Krueger, and T. Wagner, 2013: Exploring parameterization for turbulent entrainment-mixing processes in clouds. J. Geophys. Res. Atmos., 118, 185-194. doi:10.1029/2012JD018464. Published, 01/2013.
  • Sun, R., and S. K. Krueger, 2012: Mesoanalysis of the interactions of precipitating convection and the boundary layer. J. Adv. Model. Earth Syst., 4, M04004, doi:10.1029/ 2011MS000096. Published, 10/2012.
    http://dx.doi.org/10.1029/2011MS000096
  • Bogenschutz, P. A., S. K. Krueger, and M. Khairoutdinov, 2010: Assumed probability density functions for shallow and deep convection. J. Adv. Model. Earth Syst., 2, Art. #10, 24 pp., doi:10.3894/JAMES.2010.2.10. Published, 10/18/2010.
    http://dx.doi.org/10.3894/JAMES.2010.2.10
  • Garrett, T. J., M. M. Maestas, S. K. Krueger, and C. T. Schmidt, 2009: Acceleration by aerosol of a radiative-thermodynamic cloud feedback influencing Arctic surface warming. Geophys. Res. Lett., 36, L19804, doi:10.1029/2009GL040195. Published, 10/08/2009.
    http://dx.doi.org/10.1029/2009GL040195
  • Khairoutdinov, M. F. , S. K. Krueger, C.-H. Moeng, P. A. Bogenschutz, and D. A. Randall, 2009: Large-eddy simulation of maritime deep tropical convection. J. Adv. Model. Earth Syst., 1, Art. #15, 13 pp., doi:10.3894/JAMES.2009.1.15. Published, 04/2009.
    http://dx.doi.org/10.3894/JAMES.2009.1.15
  • Moeng, C.-H., M. A. LeMone, M. F. Khairoutdinov, S. K. Krueger, P. A. Bogenschutz, and D. A. Randall, 2009: The tropical marine boundary layer under a deep convection system: a large-eddy simulation study. J. Adv. Model. Earth Syst., 1, Art. #16, 13 pp., doi:10.3894/JAMES.2009.1.16. Published, 04/2009.
    http://dx.doi.org/10.3894/JAMES.2009.1.16
  • Sun, R., S. Krueger, M. A. Jenkins, M. A. Zulauf, and J. Charney, 2009: The importance of fire/atmosphere coupling and boundary-layer turbulence to wildfire spread. International Journal of Wildland Fire, 18, 50–60. DOI: 10.1071/WF07072. Published, 02/17/2009.
    http://www.publish.csiro.au/wf/WF07072
  • Ackerman, A.S., M.C. VanZanten, B. Stevens, V. Savic-Jovcic, C.S. Bretherton, A. Chlond, J.C. Golaz, H. Jiang, M. Khairoutdinov, S.K. Krueger, D.C. Lewellen, A. Lock, C.H. Moeng, K. Nakamura, M.D. Petters, J.R. Snider, S. Weinbrecht, and M. Zulauf, 2009: Large-eddy simulations of a drizzling, stratocumulus-topped marine boundary layer. Mon. Wea. Rev., 137, 1083–1110. Published, 2009.
    http://ams.allenpress.com/perlserv/?request=get-ab...