Sumant Nigam's Homepage
  


Sumant Nigam
Professor
Department of Atmospheric & Oceanic Science (AOSC)

3419 Computer & Space Sciences Bldg., University of Maryland
College Park, MD 20742-2425, USA
Voice:(301) 405-5381 (5391)     Fax:(301) 314-9482
Email: nigam@umd.edu     Web Page: http://atmos.umd.edu/~nigam

Ph.D., Geophysical Fluid Dynamics 1984, Princeton University
M.Sc., Physics 1978, Indian Institute of Technology, Kanpur, India

Sumant Nigam received his Ph.D. in Geophysical Fluid Dynamics from Princeton University's Atmospheric & Oceanic Sciences program in 1984. From 1984 to 1987, he was a postdoctoral associate of Richard Lindzen in the Earth, Atmospheric and Planetary Sciences department of the Massachusetts Institute of Technology. He came to the University of Maryland in 1987. Sumant was director of the Large-scale Dynamic Meteorology program of the US National Science Foundation from 2000-2002. Sumant is a Fellow of the American Meteorological Society and the Royal Meteorological Society. Bio-sketch.

Teaching
  • HONR 238P: The Water Cycle and Water Wars of the American West (Honors Seminar; offered once in Fall 2007)
  • AOSC 610:    Dynamics of Atmosphere and Ocean - I (Core course in Fall; teach alternate years)
  • AOSC 611:    Dynamics of Atmosphere and Ocean - II (Core course in Spring; teach occasionally, last in 2010)
  • AOSC 617:    Atmospheric and Oceanic Climate (Core course in Spring; teach every year)
  • AOSC 658N: North American Hydroclimate (Elective offered alternate years since Fall 2005, last in 2012; Course projects)
  • AOSC 671:   Ocean-Atmosphere Interaction (Elective taught in Spring 2004 & 2005 with James Carton)
  • AOSC 798/899: Directed Graduate/Dissertation Research (Sec # 2001)
  • Undergraduate Research Opportunity
    Select sophomores and juniors can participate in exciting climate analysis research through the Maryland Center for Undergraduate Research (MCUR). My MCUR project is on Climate links between remote regions (Teleconnections): Structure and mechanismsRequired: Interest/expertise in statistical analysis (e.g., correlations, analysis of variance) and a GPA of at least 3.50. Familiarity with MATLAB or comparable software packages will be helpful, as will be exposure to computer programming (Fortran) and UNIX OS. Background in Physics, Applied Math, or Environmental Sciences is preferred.
    Research Interests
  • Pacific & Atlantic SST: Evolution-centric analysis of natural variability & secular trend; SST Principal Components here
  • Recent surface warming of the Northern Continents: Contribution of multidecadal natural variability
  • Atlantic tropical cyclones: Natural variability and secular change in 20th century counts
  • Great Plains hydroclimate variability: Local & remote water sources; GPLLJ variability; Pacific & Atlantic links
  • North American Droughts: Analysis and SST-based reconstruction of major 20th Century episodes
  • Absorbing aerosols and Asian summer monsoon hydroclimate: Delayed onset from semi-direct effects
  • Seasonal evolution of the sea-level pressure anticyclones (e.g., Bermuda High): Role of the midlatitudes
  • Basin-scale Oscillations: North Atlantic, North Pacific & Atlantic Multidecadal (NAO, NPO, AMO): Mechanism & impacts
  • Decadal ocean-atmosphere variability in the Northern high latitudes: Impact on Arctic sea ice
  • Evolution of eastern tropical Pacific climate: Ocean-atmosphere coupling & stratus clouds
  • Dynamical diagnosis of climate variability in NCAR/CSM, NASA/NSIPP, and IPCC simulations
  • Diagnosis of 3D diabatic heating from ERA-40, ERA-15, and NCEP reanalyses; Monthly Heating here
  • South Asian Regional Reanalysis: A NOAA - Ministry of Earth Sciences (India) collaboration
  • Brief CV
    1972/73:       All India Higher Secondary Examination, New Delhi (national merit list, top five)
    1973-1978:   National Science Talent Scholar, Government of India (national merit list, top five)
    1973-1978:   Indian Institute of Technology, Kanpur, India; M.Sc. in Physics (5-year program)
    1978-1979:   University of Washington, Seattle; Graduate studies in Atmospheric Sciences
    1979-1984:   Princeton University; M.A., Ph.D. in Geophysical Fluid Dynamics; Advisor: Isaac M. Held
    1984-1986:   Massachusetts Institute of Technology, Cambridge; Postdoc with Richard S. Lindzen
    1987-        :   University of Maryland, College Park; Research Scientist, Research Professor, Professor
    2000-2003:   US National Science Foundation; Director, Large-scale Dynamic Meteorology Program
    Committees/Honors
    2014-        :   Chair, AMS Committee on Climate Variability and Change, American Meteorological Society
    2013-        :   Distinguished Alumnus Award, Indian Institute of Technology, Kanpur, India
    2012-        :   International Commission on Dynamic Meteorology, IAMAS, IUGG
    2011-2012:   Lead, CMIP5 Task Force - MAPP Program, NOAA Climate Program Office
    2011-        :   Nominating Committee, UCAR, Boulder
    2011-2012:   Drafting Committee, AMS Information Statement on Climate Change
    2011-2012:   Board of Atmospheric Sciences and Climate, The National Academies
    2008-2010:   Climate Research Committee, The National Academies
    2010-        :   Drought Interest Group, World Climate Research Programme
    2006-        :   Fellow, American Meteorological Society, Royal Meteorological Society
    2006-2009:   Drought Working Group, US CLIVAR
    2005-2006:   Editor, Journal of Climate
    2005-2006:   Co-Chair, Phenomena, Observations and Synthesis panel, US CLIVAR.
    2005-2009:   Co-Chair, Climate Variability Working Group, NCAR Community Climate System Model
    2005-2006:   Steering Committee, US CLIVAR
    2003-2005:   Committee on Climate Variability and Change, American Meteorological Society
    Other
    2011-        :   Organizer, The Eugene Rasmusson Lectures, Dept. of Atmospheric & Oceanic Science, University of Maryland
    2010-        :   U Md. Representative, University Corporation for Atmospheric Research (UCAR)
    2008-        :   Member, India International Center, New Delhi, India
    Current Students
  • Argyro Kavvada (2009; Candidate, Nov. 2013; Advisors: Nigam & Ruiz-Barradas): Atlantic Multidecadal Variability in IPCC-AR5 climate simulations: Surface and sub-surface structure.
  • Yongjing Zhao (2009; Candidate, Feb. 2013; Advisors: Kalnay & Nigam): The North-South dipole trend in Chinese rainfall: Causes
  • Stephen Baxter (2010, Candidate, May 2013; Staff Meteorologist, NOAA/CPC): Supersynoptic winter circulation variability in the Northern extratropics: Pentad evolution and mechanisms. AMS Graduate Fellowship 2010; CMNS Dean's Fellowship 2011; Eugene Rasmusson Graduate Fellowship 2013
  • Rebecca Eager (2010; Scientist, Johns Hopkins APL): Seasonal and interannual variability of Arctic sea-ice: Dynamic and thermodynamic factors.
  • Ryan Clark (2012; LT, US Coast Guard): Regional climate and environmental impacts of the opening of the Arctic.
  • Doctoral Theses Advised (2007-Present;  ALL)
  • Kye-Hwan Kim (Ph.D., May 2013): Statistical Modeling of Atlantic hurricane activity using atmospheric reanalyses and IPCC simulations and projections. Lt. Colonel, South Korea Air Force, Seoul.
  • Massimo Bollasina (Ph.D., April 2010): Surface and aerosol effects on the South Asian monsoon hydroclimate. Wylie Dissertation Fellowship, Univ. of Maryland Graduate School 2008-2009; Best Student Seminar 2008; Global Climate Change Fellowship, The Green Fund Foundation 2009; Best Doctoral Dissertation 2010. Postdoc, NOAA/GFDL, Princeton University (2010-2013); WCRP Young Scientist Award 2011;WMO Norbert Gerbier-MUMM International Award 2013;
    AGU James R. Holton Junior Scientist Award 2013; Assistant Professor, University of Edinburgh, Scotland (2013-).
  • Bin Guan (Ph.D., October 2008): Pacific decadal SST variability and North American droughts. Wylie Dissertation Fellowship, Univ. of Maryland Graduate School, 2007-2008; Univ. of Maryland Goldhaber Travel Award 2007.
    Visiting Scientist, Climate Physics Group, Jet Propulsion Laboratory, California Institute of Technology, Pasadena.
    Bin Guan in NASA/JPL News.
  • Ching-Yee Chang (Ph.D., July 2008; advisors: Sumant Nigam & James Carton): Seasonal and interannual ocean-atmosphere variability in the tropical Atlantic: Observed structure and model representation. Univ. of Maryland Goldhaber Travel Award 2007; Visiting Scholar, Department of Geography, University of California, Berkeley.
  • Megan Linkin (Ph.D., May 2008): North Pacific climate variability and Arctic sea ice. AMS Global Change Travel Scholarship 2005-07; University of Maryland Goldhaber Travel Award 2006. Atmospheric Peril Specialist.
    Vice President, Global Partnerships, Swiss Re, Armonk, New York. Megan in NY Times.
  • Steven Chan (Ph.D., April 2008): On the summertime development of the North Pacific sea-level pressure anticyclone. NASA Earth System Science Fellow, 2004-07; NSF East Asian-Pacific Summer Institute Fellow, 2004.
    Scientist, UK Meteorological Office, Exeter, UK.
  • Scott Weaver (Ph.D., May 2007): The Great Plains Low-level Jet: Structure, variability mechanisms & hydroclimate impacts. Center for Teaching Excellence Distinguished Teaching Assistant Award, 2004-05;  Research Meteorologist, NOAA Climate Prediction Center, College Park;  Presidential Early Career Award for Scientists and Engineers (PECASE) 2012.

    Recent Presentations (2011-Present;  2009-2010;  Conference Sessions)
  • Japan Society for Promotion of Science - Climate Change Symposium, Cosmos Club, Washington, DC (22 February 2013)
  • Department of Atmospheric Sciences, National Taiwan University, Taipei (21 September 2012)
  • NTU International Science Conference on Climate Change: Multidecadal and Beyond; Taida Institute for Mathematical Sciences, National Taiwan University, Taipei (17-20 September 2012)
  • National Monsoon Mission: Consultancy Meeting; Indian Institute of Tropical Meteorology, Pune (11-12 September 2012)
  • The Philander Symposium, Princeton University, NJ (6 September 2012)
  • LASG Seminar, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China (10 August 2012)
  • ICDM Workshop on Dynamics & Predictability of High Impact Weather & Climate Events, Kunming, China (6-9 August 2012)
  • Department of Civil and Environmental Engineering, University of Illinois, Urbana-Champaign (22 June 2012)
  • WCRP Global Drought Information Workshop, Frascati, Italy (11-13 April 2012)
  • Atmospheric Science & Physical Oceanography (CASPO) Seminar, University of California, San Diego (5 April 2012)
  • Institute for Terrestrial & Planetary Atmospheres, State University of New York, Stony Brook (21 March 2012)
  • Indian Institute of Tropical Meteorology, Pune, India; Golden Jubilee Celebrations, 21-25 February 2012
  • Department of Civil and Environmental Engineering, University of California, Irvine (19 December 2011)
  • NRC Workshop on Himalayan Glaciers, Hydrology and Climate Change, Washington, DC (19-20 October 2011)
  • GEWEX TRACE Workshop: The atmosphere/climate system. Silver Spring, MD (18-20 April 2011)
  • WCRP Workshop on Drought Predictability and Prediction in a Changing Climate, Barcelona, Spain (2-5 March 2011)
  • Caribbean GPS Observational Network, COCONet Workshop, San Juan, Puerto Rico (3-4 February 2011)
  • 25th Conference on Hydrology, AMS Annual Meeting, Seattle (27 January 2011)
  • NRC Committee on Climate, Energy, and National Security, Washington, DC (10-11 January 2011).
  • National Center for Medium Range Weather Forecasting Seminar, Ministry of Earth Sciences, India (5 January 2011)

    Publications
    Reference Works
  • Nigam, S., 2003: Teleconnections. Encyclopedia of Atmospheric Sciences; Editors: J.R. Holton, J.A. Pyle & J.A. Curry; Academic Press, Elsevier Science, London, 2243-2269.
  • Nigam, S., and E. DeWeaver, 2003: Stationary Waves (Orographic and Thermally forced). Encyclopedia of Atmospheric Sciences; Editors: J.R. Holton, J.A. Pyle & J.A. Curry; Academic Press, Elsevier Science, London, 2121- 2137.

    Pre-2005    2005-2010

    2011-Present
  • Nigam, S., B. Guan, and A. Ruiz-Barradas, 2011: Key role of the Atlantic Multidecadal Oscillation in 20th century drought and wet periods over the Great Plains. Geophys. Res. Lett., 38, L16713, doi:10.1029/2011GL048650.
  • Nigam, S., and B. Guan, 2011: Atlantic Tropical Cyclones in the 20th Century: Natural Variability and Secular Change in Cyclone Count. Climate Dynamics, 36:2279-2293 DOI 10.1007/s00382-010-0908-x.
  • Nigam, S., and M. Bollasina, 2011: Reply to comment by K. M. Lau and K. M. Kim on "'Elevated heat pump' hypothesis for the aerosol-monsoon hydroclimate link: 'Grounded' in observations? J. Geophys. Res. 116, D07204, doi:10.1029/2010JD015246.
  • Bollasina, M., and S. Nigam, 2011: The Summertime "Heat" Low over Pakistan / Northwestern India: Evolution and Origin. Climate Dynamics, 37:957-970 DOI 10.1007/s00382-010-0879-y.
  • Bollasina, M., and S. Nigam, 2011: Modeling of Regional Hydroclimate Change over the Indian Subcontinent: Impact of the Expanding Thar Desert J. Climate, 24, 3089-3106.
  • Bollasina, M., and S. Nigam, 2011: Increasing desertification of Northwestern India can adversely impact the South Asian monsoon. GEWEX News, 21, No. 2, 8-10.
  • Weaver, S.J., and S. Nigam, 2011: Recurrent Supersynoptic Evolution of the Great Plains Low-Level Jet.
    J. Climate, 24, 575-582.
  • Grodsky, S., J. Carton, S. Nigam, and Y. Okumura, 2012: Tropical Atlantic Biases in CCSM4. J. Climate, 25, 3684-3701.
  • Ruiz-Barradas, A, and S. Nigam, 2013: Atmosphere-Land-surface Interactions over the Southern Great Plains: Characterization from Pentad Analysis of DOE-ARM Field Observations and NARR Reanalysis. J. Climate, 26, 875-886.
  • Kavvada, A., A. Ruiz-Barradas, and S. Nigam, 2013: AMO's Structure and Climate Footprint in Observations and IPCC AR5 Climate Simulations. Climate Dynamics, DOI 10.1007/s00382-013-1712-1, published online 9 March.
  • Baxter, S., and S. Nigam, 2013: A Sub-Seasonal Teleconnection Analysis: PNA Development and Its Relationship to the NAO. J. Climate, 26, 6733-6741.
  • Ruiz-Barradas, A., S. Nigam, and A. Kavvada, 2013: The Atlantic Multidecadal Oscillation in 20th Century Climate Simulations: Uneven Progress from CMIP3 to CMIP5. Climate Dynamics, DOI 10.1007/s00382-013-1810-0.
  • Sheffield, J., et al. (including S. Nigam), 2013: North American Climate in CMIP5 Experiments. Part I: Evaluation of Historical Simulations of Continental and Regional Climatology. J. Climate (in press).
  • Sheffield, J., et al. (including S. Nigam), 2013: North American Climate in CMIP5 Experiments. Part II: Evaluation of Historical Simulations of Intra-Seasonal to Decadal Variability. J. Climate (in press).
  • Nigam, S. and S. Baxter, 2013: Teleconnections. Encyclopedia of Atmospheric Sciences; Editors: Gerald North, Fuqing Zhang and John Pyle; Academic Press, Elsevier Science, London (Invited contribution).
  • Nigam, S., Y. Zhao, and T. Zhou, 2013: The South-Flood North-Drought Pattern over Eastern China and the Drying of the Gangetic Plain: Observations, Simulations, and Origin. Invited book chapter in Climate Change: Multidecadal and Beyond  (Editors: Michael Ghil, Mojif Latif, Mike Wallace and C.P. Chang), World Press.
  • Zhao, Y., and S. Nigam, 2014: The Indian Ocean Dipole: A Monopole in SST. Submitted to J. Climate on 14 January.

    Science Cover (28 May 2004)
    Acknowledgements: I thank Owen Thompson for his advice and help with web-page development; Owen generously provided his web-page template and photo-editing skills.