climate scientist

  • about

    I am interested in better understanding how our Earth will respond to increased greenhouse gases. My research involves estimating the rate of warming in the atmosphere as measured from satellite observations. I then compare these observations with global climate models that are used to project future changes in climate.

    I also look for ways to apply my skills toward other global problems and am particularly interested in global health and food security. I have been an active participant in science education and outreach and enjoy getting kids interested in science and helping the public learn about climate change.

  • research interests

    • Reconciling differences between satellite microwave estimates of tropical tropospheric warming
    • Tropical tropospheric amplification in global climate models and satellite observations
    • Climate sensitivity and feedbacks
    • Food security
  • media

Decade of heavy storms has helped Northwest glaciers, but don't expect that to last, studies show

January 2019: Seattle Times including coverage of our snowpack study.

Up to half of Arctic's melt might be totally natural

March 2017: Popular science coverage of our study on the role of natural variabily's role in sea ice loss.

The interaction between sea surface temperature and the atmosphere

April 2015: EOS coverage of our study on the role of the warming of the west Pacific in warming the tropical troposphere.

Reconciling satellite temperature trends

March 2015: Guardian coverage of our study working toward reconciling tropical atmospheric temperature trends.


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  • publications

    In preparation Po-Chedley, S., et al., "Climatology differences explain intermodel spread in upper tropospheric cloud and humidity response to greenhouse gases," Geophys. Res. Lett.
    2019 Santer, B. D., et al., 2019: "Celebrating the Anniversary of Three Key Events in Climate Change Science," Nature Climate Change, 9, 180 - 182, doi: 10.1038/s41558-019-0424-x.
    Siler, N., C. Proistosescu, and S. Po-Chedley, 2019: "Natural variability has slowed the decline in western-US snowpack since the 1980s" Geophys. Res. Lett., 46, 346 - 355, doi: 10.1029/2018GL081080.
    2018 Po-Chedley, S., C. Proistosescu, K. C. Armour, and B. D. Santer, 2018: "Forced temperature changes contaminate a natural variability constraint on climate sensitivity," Nature, Brief Communication Arising, 563 (7729), E6 - E9, doi: 10.1038/nature25450.
    Santer, B., S. Po-Chedley, M. Zelinka, et al, 2018: "Human influence on the seasonal cycle of tropospheric temperature", Science, 361 (6399), eaas8806, doi: 10.1126/science.aas8806 [Perspective, Carbon Brief]
    Po-Chedley, S. et al, 2018: "Sources of intermodel spread in the lapse rate and water vapor feedbacks", J. Clim., 31, 3187 - 3206, doi: 10.1175/JCLI-D-17-0674.1
    2017 Bilinski, A., E. Birru, M. Peckarsky, M. Herce, N. Kalanga, C. Neumann, G. Bronson, S. Po-Chedley, C. Kachimanga, R. McBain, J. Keck, 2017: “Distance to care, enrollment and loss to follow-up of HIV patients during decentralization of antiretroviral therapy in Neno District, Malawi: A retrospective cohort study,” PLOS ONE, 12 (10), e0185699, doi: 10.1371/journal.pone.0185699
    Santer, B. D. et al., 2017: "Causes of differences in model and satellite tropospheric warming rates," Nature Geoscience, 10, 478 - 485, doi: 10.1038/NGEO2973.
    Santer, B., S. Solomon, F.J. Wentz, Q. Fu, S. Po-Chedley, C. Mears, J.F. Painter, C. Bonfils, 2017: "Tropospheric Warming Over The Past Two Decades," Scientific Reports, 7, 2336, doi: 10.1038/s41598-017-02520-7.
    Siler, Nicholas, S. Po-Chedley, C. Bretherton, 2017: "An observational constraint on the global cloud feedback," Climate Dynamics, 50 (3-4), 1209 - 1220, doi: 10.1007/s00382-017-3673-2.
    Ding, Q., A. Schweiger, M. L'Heureux, D. S. Battisti, S. Po-Chedley, N. C. Johnson, E. B. Wrigglesworth, Q. Zhang, K. Harnos, R. Eastman, E. J. Steig, 2017: "Influence of the recent high-latitude atmospheric circulation change on summertime Arctic sea ice," Nature Climate Change, 7 (4), 289 - 295, doi: 10.1038/nclimate3241. [Popular Science | Christian Science Monitor]
    Santer, B. D., S. Solomon, G. Pallotta, C. Mears, S. Po-Chedley, Q. Fu, F. Wentz, C.-Z. Zou, J. Painter, I. Cvijanovic, and C. Bonfils: Comparing tropospheric warming in climate models and satellite data,” J. Clim., 30 (4), 373 - 392, doi: 10.1175/JCLI-D-16-0333.1. [Guardian Coverage]
    2015 Po-Chedley, Stephen, Tyler J. Thorsen, and Qiang Fu: “Removing diurnal cycle contamination in satellite-derived tropospheric temperatures: Understanding tropical tropospheric trend discrepancies.” J. Clim., 28 (6), 2274 - 2290, doi: 10.1175/JCLI-D-13-00767.1. [Guardian Coverage]
    2014 Flannaghan, T. J., S. Fueglistaler, I. M. Held, S. Po-Chedley, B. Wyman, and M. Zhao, 2014: “Tropical temperature trends in Atmospheric General Circulation Model simulations and the impact of uncertainties in observed SSTs.” J. Geophys. Res., 119, 13,327 - 13,337, doi: 10.1002/2014JD022365. [EOS Summary]
    2013 Po-Chedley, Stephen and Qiang Fu, 2013: “Reply to Comments on ‘A bias in the mid-tropospheric channel warm target factor on the NOAA-9 microwave sounding unit.’” J. Atm. Oceanic Techol., 30 (5), 1014 - 1020, doi: 10.1175/JTECH-D-12-00131.1.
    2012 Po-Chedley, Stephen and Qiang Fu, 2012: “Discrepancies in tropical upper tropospheric warming between atmospheric circulation models and satellites.” Environ. Res. Lett., 7, 044018 (8pp), doi: 10.1088/1748-9326/7/4/044018. [ERL Summary]
    Po-Chedley, Stephen and Qiang Fu, 2012: “A bias in the mid-tropospheric channel warm target factor on the NOAA-9 microwave sounding unit.” J. Atm. Oceanic Techol., 29 (5), 646-652, doi: 10.1175/JTECH-D-11-00147.1. [UW Today]