GFDL - Geophysical Fluid Dynamics Laboratory

John P. Krasting

Research Interests

My primary interests as a climate scientist are in the realm of studying and modeling climate-carbon cycle interactions, the ocean’s role in the climate system, and the development of climate models with a particular focus on inter-annual variability and future climate change.  I also develop “big data” diagnostics, metrics, and analyses to help benchmark and analyze climate model results.

Primary Research Activities

  • Understanding the relationships between climate variability and carbon cycle variability
  • Characterizing the role of natural carbon cycle variability during the 20th century
  • Exploring the sensitivity of the coupled climate-carbon cycle system to different climate change scenarios
  • Understanding the predictability of oceanic heat uptake, carbon uptake, and sea level rise
  • Developing coupled climate-carbon cycle Earth System Models (ESMs)

Other Research Interests

  • Understanding climate on millennial / paleo timescales
  • Idealized climate forcing scenarios
  • Execution of GFDL’s Earth System Model (ESM) experiments for the Fifth Coupled Model Inter-comparison Project (CMIP5)
  • Regional and hemispheric response of snowfall to increases in greenhouse gas (GHG) concentrations


  • Ph.D., Atmospheric Science, Rutgers University, 2008
  • B.S., Meteorology, Rutgers University, 2003

Research Highlights

Regional variations in sea level rise

In a paper published in Nature Geoscience, we demonstrate that basin scale differences in heat uptake and sea level rise (SLR) are a forced response from increasing atmospheric carbon dioxide concentrations, and the inter-basin differences vary with emission rate (see figure). Weaker overturning circulations in the Atlantic in the higher emission scenarios (i.e. > 5 GtC yr-1) make the ocean interior both warmer and less ventilated and are associated with enhanced Atlantic sea level rise, relative to the Pacific.  In this paper, we also explore basin-averaged SLR through the lens of cumulative carbon emissions.

Does TCRE depend on the rate of carbon emissions?

In a recent paper published in Geophysical Research Letters, we explore this question using the GFDL’s ESM2G coupled climate-carbon cycle model.  Our results indicate that TCRE varies between 0.76 and 1.04 °C/TtC for emissions ranging between 2 GtC/year and 25 GtC/year.  TCRE is highest for both the very low and very high emissions rates, but is lowest for emission rates that are close to present-day rates (i.e. 5 to 10 GtC/year).  We also demonstrate that the TCRE signal difficult to detect under low emissions and on short timescales.  Furthermore, the climate response to zero-emissions depends on prior emission rates.  [more]

Our paper was also highlighted in the April 2014 issue of Nature Climate Change.


Recent Publications

  1. Naiman, Z, P J Goodman, John P Krasting, Sergey Malyshev, J L Russell, Ronald J Stouffer, and Andrew T Wittenberg, June 2017: Impact of mountains on tropical circulation in two Earth System Models. Journal of Climate, 30(11), doi:10.1175/JCLI-D-16-0512.1.
    [ Abstract ]
  2. Eyring, V, M Righi, A Lauer, M Evaldsson, S Wenzel, C Jones, A Anav, O Andrews, I Cionni, E L Davin, C Deser, C Ehbrecht, P Friedlingstein, P J Gleckler, K-D Gottschaldt, S Hagemann, M Juckes, S Kindermann, and John P Krasting, et al., May 2016: ESMValTool (v1.0) – a community diagnostic and performance metrics tool for routine evaluation of Earth system models in CMIP. Geoscientific Model Development, 9(5), doi:10.5194/gmd-9-1747-2016.
    [ Abstract ]
  3. Griffies, Stephen M., G Danabasoglu, P J Durack, Alistair Adcroft, V Balaji, C Boning, E P Chassignet, E N Curchitser, J Deshayes, H Drange, B Fox-Kemper, P J Gleckler, J M Gregory, H Haak, Robert Hallberg, H T Hewitt, D M Holland, T Ilyina, J H Jungclaus, Y Komuro, John P Krasting, W G Large, S J Marsland, S Masina, T J McDougall, A J George Nurser, James C Orr, A Pirani, F Qiao, Ronald J Stouffer, K E Taylor, A M Treguier, H Tsujino, P Uotila, M Valdivieso, Michael Winton, and S G Yeager, September 2016: OMIP contribution to CMIP6: experimental and diagnostic protocol for the physical component of the Ocean Model Intercomparison Project. Geoscientific Model Development, 9(9), doi:10.5194/gmd-9-3231-2016.
    [ Abstract ]
  4. Krasting, John P., John P Dunne, Ronald J Stouffer, and Robert Hallberg, March 2016: Enhanced Atlantic sea-level rise relative to the Pacific under high carbon emission rates. Nature Geoscience, 9(3), doi:10.1038/ngeo2641.
    [ Abstract ]
  5. Frölicher, Thomas L., Jorge L Sarmiento, David J Paynter, John P Dunne, John P Krasting, and Michael Winton, January 2015: Dominance of the Southern Ocean in anthropogenic carbon and heat uptake in CMIP5 models. Journal of Climate, 28(2), doi:10.1175/JCLI-D-14-00117.1.
    [ Abstract ]
  6. Ding, Y, J A Carton, G A Chepurin, G Stenchikov, A Robock, Lori T Sentman, and John P Krasting, September 2014: Ocean response to volcanic eruptions in Coupled Model Intercomparison Project 5 (CMIP5) simulations. Journal of Geophysical Research, 119(9), doi:10.1002/2013JC009780.
    [ Abstract ]
  7. Krasting, John P., John P Dunne, Elena Shevliakova, and Ronald J Stouffer, April 2014: Trajectory sensitivity of the transient climate response to cumulative carbon emissions. Geophysical Research Letters, 41(7), doi:10.1002/2013GL059141.
    [ Abstract ]
  8. Dunne, John P., Jasmin G John, Elena Shevliakova, Ronald J Stouffer, John P Krasting, Sergey Malyshev, P C D Milly, Lori T Sentman, Alistair Adcroft, William F Cooke, Krista A Dunne, Stephen M Griffies, Robert Hallberg, Matthew J Harrison, Hiram Levy II, Andrew T Wittenberg, Peter Phillipps, and Niki Zadeh, April 2013: GFDL's ESM2 global coupled climate-carbon Earth System Models Part II: Carbon system formulation and baseline simulation characteristics. Journal of Climate, 26(7), doi:10.1175/JCLI-D-12-00150.1.
    [ Abstract ]
  9. Hallberg, Robert, Alistair Adcroft, John P Dunne, John P Krasting, and Ronald J Stouffer, May 2013: Sensitivity of Twenty-First-Century Global-Mean Steric Sea Level Rise to Ocean Model Formulation. Journal of Climate, 26(9), doi:10.1175/JCLI-D-12-00506.1.
    [ Abstract ]
  10. Krasting, John P., Anthony J Broccoli, Keith W Dixon, and John R Lanzante, October 2013: Future Changes in Northern Hemisphere Snowfall. Journal of Climate, 26(20), doi:10.1175/JCLI-D-12-00832.1.
    [ Abstract ]
  11. Shevliakova, Elena, Ronald J Stouffer, Sergey Malyshev, John P Krasting, G C Hurtt, and S W Pacala, October 2013: Historical warming reduced due to enhanced land carbon uptake. Proceedings of the National Academy of Sciences, 110(42), doi:10.1073/pnas.1314047110.
    [ Abstract ]
  12. Dunne, John P., Jasmin G John, Alistair Adcroft, Stephen M Griffies, Robert Hallberg, Elena Shevliakova, Ronald J Stouffer, William F Cooke, Krista A Dunne, Matthew J Harrison, John P Krasting, Sergey Malyshev, P C D Milly, Peter Phillipps, Lori T Sentman, Bonita L Samuels, Michael J Spelman, Michael Winton, Andrew T Wittenberg, and Niki Zadeh, October 2012: GFDL's ESM2 global coupled climate-carbon Earth System Models Part I: Physical formulation and baseline simulation characteristics. Journal of Climate, 25(19), doi:10.1175/JCLI-D-11-00560.1.
    [ Abstract ]

Page last updated: July 7, 2017