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Curriculum Vitae NATHANIEL C. JOHNSON Associate Research Scholar Princeton University NOAA Geophysical Fluid Dynamics Laboratory 201 Forrestal Road Princeton, New Jersey 08540-6649 Email: [email protected], Phone: (609) 452-5315 EDUCATION: Ph.D. Meteorology Spring 2009 The Pennsylvania State University, University Park, Pennsylvania B.A. Environmental Sciences and Policy, Minor in Spanish Duke University, Durham, North Carolina Spring 2001 EMPLOYMENT: Dec. 2014 – present: Associate Research Scholar Princeton University, Princeton, New Jersey Feb. 2013 – Nov. 2014: Visiting scholar, Scripps Institution of Oceanography, University of California, San Diego, California Jul. 2009 – Nov. 2014: Postdoctoral fellow, International Pacific Research Center University of Hawai’i at Manoa, Honolulu, Hawai’i PUBLICATIONS: Submitted Feng, J., Z. Wu, S.-P. Xie, and N. C. Johnson, 2015: On the evolution of different types of El Niño. Geophysical Research Letters, under review. Johnson, N. C., and Y. Kosaka, 2015: The impact of eastern equatorial Pacific convection on the diversity of boreal winter El Niño teleconnection patterns. Climate Dynamics, under review. Fučkar N. S., V. Guemas, N. C. Johnson, F. Massonnet, and F. J. Doblas-Reyes, 2015: Clusters of interannual sea ice variability in the Northern Hemisphere. Climate Dynamics, under revision. . 1 Peer-reviewed articles 2015 Chang, C.-H., and N. C. Johnson, 2015: The continuum of wintertime Southern Hemisphere atmospheric teleconnection patterns. Journal of Climate, in press. Xie, S -P., C. Deser, G. A. Vecchi, M. Collins, T. L. Delworth, A. Hall, E. Hawkins, N. C. Johnson, C. Cassou, A. Giannini and M. Watanabe, 2015: Towards predictive understanding of regional climate change. Nature Climate Change, 5, 921-930. Horton, D. E., N. C. Johnson, D. Singh, D. L. Swain, B. Rajaratnam, and N. S. Diffenbaugh, 2015: Contribution of changes in atmospheric circulation patterns to extreme temperature trends. Nature, 522, 465-469. 2014 Singh, D., D. E. Horton, M. Tsiang, M. Haugen, M. Ashfaq, R. Mei, D Rastogi, N. C. Johnson, A. Charland, B. Rajaratnam, and N.S. Diffenbaugh, 2014: Severe precipitation in northern India in June 2013: Causes, historical context, and changes in probability. [in "Explaining Extremes of 2013 from a Climate Perspective"]. Bulletin of the American Meteorological Society, 95, S58-S61. Chang, C.-H., N. C. Johnson, and N. Cassar, 2014: Neural network-based estimates of Southern Ocean net community production from in-situ O2/Ar and satellite observation: A methodological study. Biogeosciences, 11, 3279-3297. Maloney, E., S. J. Camargo, E. Chang, B. Colle, R. Fu, K. Geil, Q. Hu, X. Jiang, N. C. Johnson, K. Karnauskas, J. Kinter, B. Kirtman, S. Kumar, B. Langenbrunner, K. Lombardo, L. Long, A. Mariotti, J. Meyerson, K. Mo, D. Neelin, Z. Pan, R. Seager, Y. Serra, A. Seth, J. Sheffield, J. Stroeve, J. Thibeault, S.-P. Xie, C. Wang, B. Wyman, and M. Zhou, 2014: North American climate in CMIP5 Experiments: Part III: Assessment of 21st century projections. Journal of Climate, 27, 2230-2270. Johnson, N. C., D. C. Collins, S. B. Feldstein, M. L. L’Heureux, and E. E. Riddle, 2014: Skillful wintertime North American temperature forecasts out to four weeks based on the state of ENSO and the MJO. Weather and Forecasting, 29, 23-38. 2013 Sheffield, J., S. J. Camargo, R. Fu, Q. Hu, X. Jiang, N. C. Johnson, K. B. Karnauskas, J. Kinter, S. Kumar, B. Langenbrunner, E. Maloney, A. Mariotti, J. E. Meyerson, D. Neelin, Z. Pan, A. Ruiz-Barradas, R. Seager, Y. Serra, D.-Z. Sun, C. Wang, S.-P. Xie, J.-Y. Yu, T. Zhang, and M. Zhao, 2013: North American climate in CMIP5 Experiments. Part II: Evaluation of 20th century intra-seasonal to decadal variability. Journal of Climate, 26, 9247-9290. 2 Ito**, H., N. C. Johnson, and S.-P. Xie, 2013: Subseasonal and interannual temperature variability in relation to extreme temperature occurrence over East Asia. Journal of Climate, 26, 9026-9042. Li, J., S.-P. Xie, E. R. Cook, M. S. Morales, D. A. Christie, N. C. Johnson, F. Chen, R. D’Arrigo, A. M. Fowler, X. Gou, and K. Fang, 2013: El Niño modulations during the past seven centuries. Nature Climate Change, 3, 822-826. Johnson, N. C., 2013: How many ENSO flavors can we distinguish? Journal of Climate, 26, 4816-4827. Riddle, E. E., M. B. Stoner, N. C. Johnson, M. L. L’Heureux, D. C. Collins, and S. B. Feldstein, 2013: The impact of the MJO on clusters of wintertime circulation anomalies over the North American region. Climate Dynamics, 40, 1749-1766. 2007-2012 Chowdary, J. S., S.-P. Xie, H. Tokinaga, Y. M. Okumura, H. Kubota, N. C. Johnson, and X.-T. Zheng, 2012: Inter-decadal variations in ENSO teleconnection to the Indo-western Pacific for 1870-2010. Journal of Climate, 25, 1722-1744. Lee, S., T. T. Gong, N. C. Johnson, S. B. Feldstein, and D. Pollard, 2011: On the possible link between tropical convection and Northern Hemisphere Arctic surface air temperature change between 1958-2001. Journal of Climate, 24, 4350-4367. Small, A. A., J. B. Stefik*, J. Verlinde, and N. C. Johnson, 2011: The cloud hunter’s problem: An automated decision algorithm to improve the productivity of scientific data collection in stochastic environments. Monthly Weather Review, 139, 2276-2289. Johnson, N. C., and S.-P. Xie, 2010: Changes in the sea surface temperature threshold for tropical convection. Nature Geoscience, 3, 842-845. Johnson, N. C., and S. B. Feldstein, 2010: The continuum of North Pacific sea level pressure patterns: Intraseasonal, interannual, and interdecadal variability. Journal of Climate, 23, 851-867. Johnson, N. C., S. B. Feldstein, and B. Tremblay, 2008: The continuum of Northern Hemisphere teleconnection patterns and a description of the NAO shift with the use of self-organizing maps. Journal of Climate, 21, 6354-6371. Lebo*, Z. J., N. C. Johnson, and J. Y. Harrington, 2008: Radiative influences on ice crystal and droplet growth within mixed-phase stratus clouds. Journal of Geophysical Research, 113, D09203, doi:10.1029/2007JD009262. 3 Verlinde, J., J.Y. Harrington, G.M. McFarquhar, V.T. Yanuzzi, A. Avramov, S. Greenberg, N. Johnson, M.R. Poellot, J.H. Mather, D.D. Turner, B.D. Zak, T.P. Tooman, A.J. Prenni, G.L. Kok, E.W. Eloranta, M.D. Ivey, C.P. Bahrmann, K. Sassen, P.J. DeMott, and A.J. Heymsfield, 2007: The Mixed-Phase Arctic Cloud Experiment (MPACE). Bulletin of the American Meteorological Society, 88, 205-221. * denotes a Master’s student mentored by N. C. Johnson during his graduate studies ** denotes a Master’s student mentored by N. C. Johnson during his postdoctoral fellowship. N. C. Johnson is the corresponding author. Technical reports Sheffield, J., A. Barrett, D. Barrie, S. J. Camargo, E. K. M. Chang, B. Colle, D. N. Fernando, R. Fu, K. L. Geil, Q. Hu, X. Jiang, N. Johnson, K. B. Karnauskas, S. T. Kim, J. Kinter, S. Kumar, B. Langenbrunner, K. Lombardo, L. N. Long, E. Maloney, A. Mariotti, J. E. Meyerson, K. C. Mo, J. D. Neelin, S. Nigam, Z. Pan, T. Ren, A. Ruiz-Barradas, R. Seager, Y. L. Serra, A. Seth, D.-Z. Sun, J. M. Thibeault, J. C. Stroeve, C. Wang, S.-P. Xie, Z. Yang, L. Yin, J.-Y. Yu, T. Zhang, and M. Zhao, 2014: Regional climate processes and projections for North America: CMIP3/CMIP5 differences, attribution and outstanding issues. NOAA Technical Report OAR CPO-2, 47 pp. Non peer-reviewed articles Johnson, N. C., 2014: A boost in big El Niño. Nature Climate Change, 4, 90-91. Johnson, N. C., 2013: Book Reviews. Global Change: Interviews with Leading Climate Scientists. Bulletin of the American Meteorological Society, 94, 1587-1588. Conference papers Johnson, N., E. Riddle, M. Stoner, S. Feldstein, D. Collins, and M. L’Heureux, 2011: Toward a framework for incorporating MJO and ENSO information into CPC probabilistic extended range forecasts. Science and Technology Infusion Climate Bulletin, NOAA’s National Weather Service, 36th NOAA Annual Climate Diagnostics and Prediction Workshop, 3-6 October, Fort Worth, TX. Lebo, Z., N. Johnson, and J. Y. Harrington, 2007: Radiative influences on the BergeronFindeisen process in Arctic mixed-phase clouds. 6th Annual AMS Student Conference in San Antonio, Texas. Lebo, Z., N. Johnson, and J. Y. Harrington, 2006: Radiative influences on the glaciation timescales of Arctic mixed-phase clouds. 12th Conference on Cloud Physics, American Meteorological Society, 10-14 July, Madison, WI. 4 Lebo, Z., N. Johnson, and J. Y. Harrington, 2005: Does cloud top radiative heating and cooling affect mixed-phase cloud longevity? AGU Fall Meeting, 5-9 December, San Francisco, CA. EXTERNAL FUNDING: Title: Improved extended-range prediction through a Bayesian approach: Exploiting the enhanced predictability offered by the Madden-Julian Oscillation. Sponsor: NOAA Co-Principal Investigators: S.-P. Xie, N. C. Johnson*, S. B. Feldstein, M. L’Heureux, D. Collins, J. Gottschalk. Amount: $228,000 University of Hawai’i, $436,995 Total, August 2010 – July 2014 *At the University of Hawaii, it is required that a postdoctoral fellow’s supervisor, i.e., S.-P. Xie, be listed as the lead PI. N. C. Johnson wrote this proposal and supervised the research of all collaborators. Title: Bridging the gap in NOAA’s extended and long range prediction systems through the development of new forecast products for weeks 3 and 4 Sponsor: NOAA Co-Principal Investigators: S.-P. Xie, S. B. Feldstein, M. L’Heureux, S. Baxter Co-Investigator: N. C. Johnson* Amount: $193,000 Scripps Institution of Oceanography, $399,000 Total, August 2014 – July 2016 *As a Visiting Scholar, N.C. Johnson could not be listed as a PI. However, N.C Johnson wrote this proposal and supervises the research of all collaborators. INVITED PRESENTATIONS, SEMINARS, AND WEBINARS 2015 Johnson, N. C. (November 2015). Development of new forecast products for weeks 3-4. NOAA Climate Test Bed Meeting. Johnson, N. C., Harnos, D. (October 2015). Operational transition of combined ENSO, MJO, and trend influences on temperature and precipitation for Weeks 3-4. Webinar presentation in the NOAA MAPP Webinar series. Johnson, N. C. (July 2015). Transitioning research into operations for extended range weather and climate prediction. Penn State extended range forecast workshop for Pennsylvania middle and high school teachers. 5 Johnson, N. C. (April 2015). The diversity of El Niño teleconnection patterns during boreal winter. Lamont-Doherty Earth Observatory Ocean and Climate Physics Seminar series. Johnson, N. C., Baxter, S., Feldstein, S., L’Heureux, M., & Xie, S.-P. (February 2015). Beyond week 2: Preliminary work toward generating a North American forecast system for weeks 3-4. Webinar presentation in the NOAA MAPP Webinar series. 2014 Johnson, N. C. (October 2014). Skillful wintertime, intraseasonal North American temperature forecasts based on the state of ENSO and the MJO. 2014 AMS Board for Operational Government Meteorologists (BOGM) webinar conference Johnson, N. C. (July 2014). The diversity of El Niño teleconnection patterns during boreal winter. Geophysical Fluid Dynamics Laboratory in Princeton, New Jersey Johnson, N. C. (January 2014). The diversity and projected changes of El Niño teleconnections during boreal winter. Spring Colloquium series of the Department of Meteorology at the Pennsylvania State University 2010 Johnson, N. C. (December 2010). Changes in the sea surface temperature threshold for tropical convection. Joint IPRC/Meteorology Department seminar at the University of Hawai’i in Honolulu, Hawai’i Johnson, N. C. (July 2010). Variability and change of the sea surface temperature threshold for convection over tropical oceans. Climate Prediction Center in Camp Springs, Maryland 2009 Johnson, N. C. (April 2009). The continuum perspective of teleconnection patterns. Geophysical Fluid Dynamics Laboratory in Princeton, New Jersey Johnson, N. C. (February 2009). The continuum of atmospheric teleconnection patterns. Spring Colloquium series of the Department of Meteorology at the Pennsylvania State University 2008 Johnson, N. C. (November 2008). The continuum of atmospheric teleconnection patterns. Fall Colloquium of the IGERT Joint Program in Applied Mathematics and Earth and Environmental Sciences at Columbia University 6 2006 Johnson, N. C. (March 2006). Classification of sea level pressure patterns: A comparison between self-organizing maps and principal component analysis. Community Climate System Model (CCSM) Joint Polar Climate and Climate Variability Working Group Meeting STUDENT AND POSTDOCTORAL MENTORING: 2015-present: Supervising Dr. Jiaxin Feng with her postdoctoral research on intraseasonal climate variability and prediction 2010-2011: Mentored Mr. Hiroyuki Ito with research leading to his Master’s thesis entitled “Extreme Temperature Occurrence over East Asia,” University of Hawai’i at Manoa 2007-2009: Mentored Mr. Jason Stefik with his undergraduate and Master’s research leading to a thesis entitled “To Fly or Not to Fly: A Decision Algorithm to Improve Data Collection in Stochastic Environments,” Pennsylvania State University 2006-2007: Mentored Mr. Zachary Lebo with his undergraduate and Master’s research leading to a thesis entitled “Radiative influences on ice crystal and droplet growth within simulated mixed-phase arctic stratus clouds,” Pennsylvania State University AWARDS: 2008: Carl H. and Helen H. Chelius Graduate Fellowship in Earth Science for academic excellence in Earth Sciences from the College of Earth and Mineral Sciences, Pennsylvania State University 2002: University Graduate Fellowship, Wilson Research Award from Pennsylvania State University PROFESSIONAL ACTIVITIES: Panels: Panelist on the U.S. Department of Energy’s review of proposals to the Earth System Modeling (ESM) and the Regional and Global Climate Modeling (RGCM) Programs, 21-23 April 2014 Committees: Member of the AMS Committee on Climate Variability and Change (CVC) since January 2012 7 Conferences: Session chair at the 18th Conference on Atmospheric and Oceanic Fluid Dynamics, 13-17 June 2011; the 92nd AMS Annual Meeting, 22-26 January 2012; the 37th Annual Climate Diagnostics and Prediction Workshop, 22-25 October 2012; and the 93rd AMS Annual Meeting, 6-10 January 2013 Reviewer: African Journal of Environmental Science and Technology, Atmospheric Research, Atmospheric Science Letters, Climate Dynamics, Environmental Research Letters, Geophysical Research Letters, International Journal of Climatology, IPCC WG1 AR5, ISPRS International Journal of Geo-Information, Journal of the Atmospheric Sciences, Journal of Climate, Journal of Environmental and Agricultural Sciences, Journal of Geophysical Research – Atmospheres, Journal of Geophysical Research – Oceans, Journal of Hydrometeorology, Journal of Oceanography, Nature, Nature Climate Change, Nature Geoscience, Monthly Weather Review, Scientific Reports, Theoretical and Applied Climatology Field Research: Participated in Mixed-Phase Arctic Cloud Experiment (MPACE) September 2004 – October 2004: launched radiosondes at field sites. Volunteer in Pennsylvania Area Mobile Radar Experiment (PAMREX) in fall 2004 and 2005: served as principal operator of a Doppler on Wheels (DOW) vehicle; obtained and analyzed data for radar course. UNIVERSITY ACTIVITIES: Teaching: Instructor of Physical Meteorology Laboratory class (Spring 2005), substitute lecturer for two classes in a mesoscale meteorology class for advanced undergraduates at the Pennsylvania State University (Fall 2008), substitute lecturer for two classes in a dynamical meteorology class for advanced undergraduates (Fall 2009), two classes in tropical climate (Spring 2012) at the University of Hawai’i, and three classes in climate dynamics at the Scripps Institution of Oceanography, University of California, San Diego (Spring 2013 and 2014) Committees: Chair of Graduate Advisory Council in the Pennsylvania State University Meteorology Department (Summer 2006 – Summer 2008) 8 Panelist in professional development workshop on developing research topics at the Pennsylvania State University (November 2007) Faculty Representative for Graduate Advisory Council in the Pennsylvania State University Meteorology Department (Fall 2005 – Spring 2006) Member of committee for the construction of writing-intensive physical meteorology laboratory course (Fall 2005 – Spring 2006) SCHOLARSHIPS, SOCIETIES: Member of American Meteorology Society (AMS), American Geophysical Union (AGU), and Chi Epsilon Pi Meteorology Honor Society LANGUAGES: English Spanish – Read fair, speak/write fair MEETINGS ATTENDED: Atmospheric Radiation Measurement (ARM) Science Team Meeting, March 22-26, 2004 AMS 85th Annual Conference, January 9-13, 2005; Presented poster entitled “Advantages of T-mode Decomposition in Rotated Principal Component Analysis: Applications to the Arctic” Community Climate System Model (CCSM) Joint Polar Climate and Climate Variability Working Group Meeting, February 6-7, 2006 ARM Science Team Meeting, March 27-31, 2006; Presented poster entitled “Classification of Sea Level Pressure Patterns: A Comparison between Self-Organizing Maps and Principal Component Analysis” 17th Conference on Atmospheric and Oceanic Fluid Dynamics, June 8-12, 2009; Presented poster entitled “The continuum of North Pacific sea level pressure patterns: Intraseasonal, interannual, and interdecadal variability” 18th Conference on Atmospheric and Oceanic Fluid Dynamics, June 13-17, 2011; Gave talk entitled “Variability and change of the sea surface temperature threshold for convection” 36th Annual Climate Diagnostics and Prediction Workshop, October 3-6, 2011; 9 Gave talk entitled “A framework for incorporating MJO and ENSO information into CPC probabilistic extended range forecasts” AMS 92nd Annual Conference, January 22-26, 2012; Gave talk entitled “A Framework for Incorporating MJO and ENSO information into probabilistic extended range forecasts” and a presented a poster entitled “Local sea surface temperature versus largescale circulation influences on tropical ocean rainfall” 37th Annual Climate Diagnostics and Prediction Workshop, October 22-25, 2012; Gave talk entitled “Incorporating MJO and ENSO information into probabilistic temperature forecasts over North America” 2012 AGU Fall Meeting, December 3-7, 2012; Presented a poster entitled “ENSO teleconnections to North America in CMIP5 models: Fidelity to observed relationships and projected changes” AMS 93rd Annual Conference, January 6-10, 2013; Gave talk entitled “A Framework for Incorporating MJO information into probabilistic temperature forecasts over North America” and a presented a poster entitled “ENSO teleconnections to North America in CMIP5 models: Fidelity to observed relationships and projected changes” 38th Annual Climate Diagnostics and Prediction Workshop, October 21-24, 2013; Gave talk entitled “Skillful wintertime, intraseasonal North American temperature forecasts based on the state of ENSO and the MJO” AMS 94th Annual Conference, February 2-6, 2014; Gave talks entitled “Skillful wintertime, intraseasonal North American temperature forecasts based on the state of ENSO and the MJO” and “Partial least squares regression: A potentially useful tool for climate prediction” 2014 Ocean Sciences Meeting, February 23-28, 2014; Presented a poster entitled “A partial least squares regression approach for atmosphere and ocean predictions and diagnostics” 39th Annual Climate Diagnostics and Prediction Workshop, October 20-23, 2014; Gave talk entitled “A partial least squares regression approach for long-range intraseasonal and seasonal forecasts” 2014 AGU Fall Meeting, December 15-19, 2014; Presented a poster entitled “Probabilistic representations of regional climate change in the CESM Large Ensemble” 2015 AMS Annual Meeting, January 5-8, 2015; Gave a talk entitled “Increasing temperature extremes during the recent global warming hiatus” 10 2015 Climate Diagnostics and Prediction Workshop, October 26-29, 2015; Gave a talk entitled “Distinctions in the boreal winter teleconnection patterns between convective and non-convective eastern Pacific El Niño episodes” 11