Publications (2005-2010)
  • Ruiz-Barradas, A., and S. Nigam, 2005: Warm-season rainfall variability over the US Great Plains in Observations, NCEP and ERA-40 Reanalyses, and NCAR and NASA Atmospheric Model Simulations. J. Climate, 18, 1808-1830.
  • Ruiz-Barradas, A., and S. Nigam, 2006: Great Plains hydroclimate variability: The view from North American Regional Reanalysis. J. Climate, 19, 3004-3010.
  • Nigam, S., and A. Ruiz-Barradas, 2006: Seasonal hydroclimate variability over North America in Global and Regional Reanalyses and AMIP Simulations: Varied representation. J. Climate, 19, 815-837.
  • Ruiz-Barradas, A., and S. Nigam, 2006: IPCC's Twentieth-Century climate simulations: Varied representations of North American hydroclimate variability. J. Climate, 19, 4041-4058.
  • Joseph, R., and S. Nigam, 2006: ENSO Evolution and teleconnections in IPCC's Twentieth-Century climate simulations: Realistic representation? J. Climate, 19, 4360-4377. Intercomparion of ENSO's Spring, Summer and Fall regressions is available in this web supplement.
  • Chang, C-Y., J. A. Carton, S. A. Grodsky, and S. Nigam, 2007: Seasonal climate of the Tropical Atlantic sector in the NCAR Community Climate System Model 3: Error structure and probable causes of errors. J. Climate, 20, 1053-1070.
  • Munoz, E., A. J. Busalacchi, S. Nigam, and A. Ruiz-Barradas, 2008: Winter and summer structure of the Caribbean Low-Level Jet. J. Climate, 21, 1260-1276.
  • Weaver, S.J., and S. Nigam, 2008: Variability of the Great Plains Low-Level Jet: Large-scale circulation context and hydroclimate impacts. J. Climate, 20, 1532-1551.
  • Karnauskas, K. B., A. Ruiz-Barradas, S. Nigam, and A. J. Busalacchi, 2008: North American droughts in ERA-40 global and North American Regional Reanalysis: A Palmer Drought Severity Index perspective. J. Climate, 21, 2102-2123.
  • Linkin, M. E., and S. Nigam, 2008: The North Pacific Oscillation--West Pacific teleconnection pattern: Mature-phase structure and winter impacts. J. Climate, 21, 1979-1997.
  • Rodriguez-Puebla, C., R. T. Pinker, and S. Nigam, 2008: Relationship between downwelling surface shortwave radiative fluxes and sea surface temperature over the tropical Pacific: AMIP-II models versus satellite estimates. Ann. Geophys., 26, 785-794.
  • Guan, B., and S. Nigam, 2008: Pacific Sea Surface Temperatures in the Twentieth Century: An evolution-centric analysis of variability and trend. J. Climate, 21, 2790-2809.
  • Bollasina, M., S. Nigam, and K.-M. Lau, 2008: Absorbing aerosols and summer monsoon evolution over South Asia: An observational portrayal. J. Climate, 21, 3221-3239.
  • Chang, C-Y., S. Nigam, and J. A. Carton, 2008: Origin of the Spring-time westerly bias in equatorial Atlantic surface winds in the CAM3 model simulation. J. Climate, 21, 4766-4778.
  • Bollasina, M., and S. Nigam, 2008: Indian Ocean SST, evaporation, and precipitation during the South Asian summer monsoon in IPCC-AR4 coupled simulations. Climate Dynamics, DOI 10.1007/s00382-008-0477-4.
  • Chan, S. C., and S. Nigam, 2009: Residual Diagnosis of Diabatic Heating from ERA-40 and NCEP Reanalyses: Intercomparisons with TRMM. J. Climate, 22, 414-428.
  • Nigam, S., and S. C. Chan, 2009: On the summertime strengthening of the Northern Hemisphere Pacific sea-level pressure anticyclone. J. Climate, 22, 1174-1192.
  • Weaver, S., A. Ruiz-Barradas, and S. Nigam, 2009: Pentad evolution of the 1988 drought and 1993 flood over the Great Plains: A NARR Perspective on the atmospheric and terrestrial water balance. J. Climate, 22, 5366-5384.
  • Bollasina, M., and S. Nigam, 2009: A new pathway for absorbing aerosols' influence on the interannual variability of the South Asian monsoon. GEWEX News, February 2009, 10-11 (contd. on 20).
  • Guan, B., and S. Nigam, 2009: Analysis of Atlantic SST variability factoring inter-basin links and the secular trend: Clarified structure of the Atlantic Multidecadal Oscillation. J. Climate, 22, 4228-4240.
  • Bollasina, M., and S. Nigam, 2009: Absorbing aerosols and pre-summer monsoon hydroclimate variability over the Indian Subcontinent: The challenge in investigating links. Atmos. Res., 94, 338-344.
  • Schubert, S., et al. (including S. Nigam and A. Ruiz-Barradas), 2009: A USCLIVAR project to assess and compare the responses of global climate models to drought-related SST forcing patterns: Overview and results. J. Climate, 22, 5251-5272.
  • Ruiz-Barradas, A., and S. Nigam 2010: SST - North American hydroclimate links in AMIP simulations of the Drought Working Group models: A proxy for the idealized drought modeling experiments. J. Climate, 23, 2585-2598.
  • Ruiz-Barradas, A., and S. Nigam 2010: Great Plains Precipitation and its SST Links in 20th Century Climate Simulations, and 21st and 22nd Century Climate Projections. J. Climate, 23, 6409-6429.
  • Nigam, S., and M. Bollasina, 2010: The 'Elevated Heat Pump' Hypothesis for the Aerosol-Monsoon Hydroclimate Link: "Grounded" in Observations? J. Geophys. Res., 115, D16201, doi:10.1029/2009JD013800.