Sciences and Exploration Directorate

Jonathan Edward Hickman


Org Code: 611

Mail Code: 611
New York, NY 10025


Brief Bio

Postdoctoral Fellow at Columbia University, 2009-2011; Associate Research Scientist at Columbia University 2011-2014; Associate Editor at Nature Geoscience, 2014-2017; Researcher at Vrije Universiteit Amsterdam, 2017-2018; Senior Fellow in the NASA Postdoctoral Program, NASA-GISS, 2018-2021; Research Analyst at SciSpace LLC and NASA-GISS, 2021; Research Scientist at the Center for Climate Systems Research, Columbia University and NASA-GISS, 2021-present.

Current Projects

GISS ModelE development

 Construction, expansion and evaluation of the GISS ModelE coupled GCM.

Freeze/thaw agricultural soil nitric oxide emissions

Interactions and feedbacks between climate and exchange of nitric oxide and ammonia with soils and vegetation


Research Scientist

Columbia University & NASA-GISS - New York, NY

July 2021 - Present

Senior Fellow

NASA Postdoctoral Program - NASA-GISS, New York, NY

May 2018 - June 2021

Research Scientist

VU Amsterdam - Amsterdam, Netherlands

October 2017 - March 2018

Associate Editor

Nature Geoscience - New York, NY and London, UK

August 2014 - September 2017

Associate Research Scientist

Columbia University - New York, NY

July 2011 - July 2014

Postdoctoral Fellow

The Earth Institute at Columbia University - New York, NY

June 2009 - June 2011


B.A. English, Studio Art (Hons), Vassar College, 1995

PhD in Ecology and Evolution, State University of New York at Stony Brook, 2009

Selected Publications


Ossohou, M., J. E. Hickman, L. Clarisse, et al. P.-F. Coheur, M. Van Damme, M. Adon, V. Yoboué, E. Gardrat, M. D. Alvès, and C. Galy-Lacaux. 2023. Trends and seasonal variability in ammonia across major biomes in western and central Africa inferred from long-term series of ground-based and satellite measurements Atmospheric Chemistry and Physics 23 (16): 9473-9494 [10.5194/acp-23-9473-2023]

Tully, K. L., J. E. Hickman, T. A. Russo, et al. C. Neill, P. Matata, G. Nyadzi, P. Mutuo, and C. A. Palm. 2023. The Fate of Nitrogen During Agricultural Intensification in East Africa: Nitrogen Budgets in Contrasting Agroecosystems Journal of Geophysical Research: Biogeosciences 128 (7): e2022JG007128 [10.1029/2022jg007128]

Hickman, J. E., S. E. Bauer, G. S. Faluvegi, and K. Tsigaridis. 2023. Emissions Background, Climate, and Season Determine the Impacts of Past and Future Pandemic Lockdowns on Atmospheric Composition and Climate Earth's Future 11 (5): [10.1029/2022ef002959]

Kassamba-Diaby, M. L., C. Galy-Lacaux, V. Yoboué, et al. J. E. Hickman, C. Mouchel-Vallon, K. Jaars, S. Gnamien, R. Konan, E. Gardrat, and S. Silué. 2023. The Chemical Characteristics of Rainwater and Wet Atmospheric Deposition Fluxes at Two Urban Sites and One Rural Site in Côte d’Ivoire Atmosphere 14 (5): 809 [10.3390/atmos14050809]

Palmer, P. I., C. M. Wainwright, B. Dong, et al. R. I. Maidment, K. G. Wheeler, N. Gedney, J. E. Hickman, N. Madani, S. S. Folwell, G. Abdo, R. P. Allan, E. C. Black, L. Feng, M. Gudoshava, K. Haines, C. Huntingford, M. Kilavi, M. F. Lunt, A. Shaaban, and A. G. Turner. 2023. Drivers and impacts of Eastern African rainfall variability Nature Reviews Earth & Environment 4 (4): 254-270 [10.1038/s43017-023-00397-x]

Field, R. D., J. E. Hickman, I. V. Geogdzhayev, K. Tsigaridis, and S. E. Bauer. 2021. Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns Atmospheric Chemistry and Physics 21 18333–18350 [10.5194/acp-2020-567]

Hickman, J. E., N. Andela, E. Dammers, et al. L. Clarisse, P.-F. Coheur, M. Van Damme, C. A. Di Vittorio, M. Ossohou, C. Galy-Lacaux​​​​​​​, K. Tsigaridis​​​​​​​, and S. E. Bauer. 2021. Changes in biomass burning, wetland extent, or agriculture drive atmospheric NH3 trends in select African regions Atmospheric Chemistry and Physics 21 16277-16291 [10.5194/acp-21-16277-2021]

Hickman, J. E., N. Andela, K. Tsigaridis, et al. C. Galy‐Lacaux, M. Ossohou, E. Dammers, M. Van Damme, L. Clarisse, and S. E. Bauer. 2021. Continental and Ecoregion‐Specific Drivers of Atmospheric NO2 and NH3 Seasonality Over Africa Revealed by Satellite Observations Global Biogeochemical Cycles 35 (8): e2020GB006916 [10.1029/2020gb006916]

Jones, C. D., J. E. Hickman, S. T. Rumbold, et al. J. Walton, R. D. Lamboll, R. B. Skeie, S. Fiedler, P. M. Forster, J. Rogelj, M. Abe, M. Botzet, K. Calvin, C. Cassou, J. N. Cole, P. Davini, M. Deushi, M. Dix, J. C. Fyfe, N. P. Gillett, T. Ilyina, M. Kawamiya, M. Kelley, S. Kharin, T. Koshiro, H. Li, C. Mackallah, W. A. Müller, P. Nabat, T. van Noije, P. Nolan, R. Ohgaito, D. Olivié, N. Oshima, J. Parodi, T. J. Reerink, L. Ren, A. Romanou, R. Séférian, Y. Tang, C. Timmreck, J. Tjiputra, E. Tourigny, K. Tsigaridis, H. Wang, M. Wu, K. Wyser, S. Yang, Y. Yang, and T. Ziehn. 2021. The Climate Response to Emissions Reductions due to COVID‐19: Initial Results from CovidMIP Geophysical Research Letters 48 e2020GL091883 [10.1029/2020gl091883]

Kim, D.-G., E. Grieco, A. Bombelli, J. E. Hickman, and A. Sanz-Cobena. 2021. Challenges and opportunities for enhancing food security and greenhouse gas mitigation in smallholder farming in sub-Saharan Africa. A review Food Security 13 457–476 [10.1007/s12571-021-01149-9]

Hickman, J. E., N. Andela, K. Tsigaridis, et al. C. Galy-Lacaux, M. Ossohou, and S. E. Bauer. 2021. Reductions in NO2 burden over north equatorial Africa from decline in biomass burning in spite of growing fossil fuel use, 2005 to 2017 Proceedings of the National Academy of Sciences 118 (7): e2002579118 [10.1073/pnas.2002579118]

Bakayoko, A., C. Galy-Lacaux, V. Yoboué, et al. J. E. Hickman, F. Roux, E. Gardrat, F. Julien, and C. Delon. 2021. Dominant contribution of nitrogen compounds in precipitation chemistry in the Lake Victoria catchment (East Africa) Environmental Research Letters 16 045013 [10.1088/1748-9326/abe25c]

Hickman, J. E., B. Kaya, A. Kebede, et al. S. Kandji, L. Fitch, C. Neill, G. Nyadzi, W. Diru, and C. A. Palm. 2021. Little effect of land use on N2O and NO emission pulses following re‐wetting of dry soils across seasonally‐dry sub‐Saharan Africa Journal of Geophysical Research: Biogeosciences 126 e2020JG005742 [10.1029/2020jg005742]

Hickman, J. E., S. Zingore, C. Galy-Lacaux, et al. J. Kihara, M. Bekunda, and C. A. Palm. 2020. Assessing Synergies and Trade-Offs from Nitrogen Use in Africa Just Enough Nitrogen [10.1007/978-3-030-58065-0]

Huddell, A. M., G. L. Galford, K. L. Tully, et al. C. Crowley, C. A. Palm, C. Neill, J. E. Hickman, and D. N. Menge. 2020. Meta‐analysis on the potential for increasing nitrogen losses from intensifying tropical agriculture Global Change Biology 26 (3): 1668-1680 [10.1111/gcb.14951]

Ossohou, M., C. Galy-Lacaux, V. Yoboué, et al. J. Hickman, E. Gardrat, M. Adon, S. Darras, D. Laouali, A. Akpo, M. Ouafo, B. Diop, and C. Opepa. 2019. Trends and seasonal variability of atmospheric NO2 and HNO3 concentrations across three major African biomes inferred from long-term series of ground-based and satellite measurements Atmospheric Environment 207 148-166 [10.1016/j.atmosenv.2019.03.027]

Hickman, J. E., E. Dammers, C. Galy-Lacaux, and G. R. van der Werf. 2018. Satellite evidence of substantial rain-induced soil emissions of ammonia across the Sahel Atmospheric Chemistry and Physics 18 (22): 16713-16727 [10.5194/acp-18-16713-2018]

Huang, Y., J. E. Hickman, and S. Wu. 2018. Impacts of enhanced fertilizer applications on tropospheric ozone and crop damage over sub-Saharan Africa Atmospheric Environment 180 117-125 [10.1016/j.atmosenv.2018.02.040]

Hickman, J. E., Y. Huang, S. Wu, et al. W. Diru, P. M. Groffman, K. L. Tully, and C. A. Palm. 2017. Nonlinear response of nitric oxide fluxes to fertilizer inputs and the impacts of agricultural intensification on tropospheric ozone pollution in Kenya Global Change Biology 23 (8): 3193-3204 [10.1111/gcb.13644]

Tully, K. L., J. Hickman, M. McKenna, C. Neill, and C. A. Palm. 2016. Effects of fertilizer on inorganic soil N in East Africa maize systems: vertical distributions and temporal dynamics Ecological Applications 26 (6): 1907-1919 [10.1890/15-1518.1]

Rosenstock, T. S., B. O. Sander, K. Butterbach-Bahl, et al. M. C. Rufino, J. E. Hickman, C. Stirling, M. Richards, and L. Wollenberg. 2016. Introduction to the SAMPLES Approach Methods for Measuring Greenhouse Gas Balances and Evaluating Mitigation Options in Smallholder Agriculture 1-13 [10.1007/978-3-319-29794-1]

Hickman, J. E., K. L. Tully, P. M. Groffman, W. Diru, and C. A. Palm. 2015. A potential tipping point in tropical agriculture: Avoiding rapid increases in nitrous oxide fluxes from agricultural intensification in Kenya Journal of Geophysical Research: Biogeosciences 120 (5): 938-951 [10.1002/2015jg002913]

Hickman, J. E., R. J. Scholes, T. S. Rosenstock, C. Perez Garcia Pando, and J. Nyamangara. 2014. Assessing non-CO2 climate-forcing emissions and mitigation in sub-Saharan Africa Curr. Opin. Environ. Sustain. 9-10 65-72 [10.1016/j.cosust.2014.07.010]

Hickman, J. E., C. A. Palm, P. Mutuo, J. M. Melillo, and J. Tang. 2014. Nitrous oxide (N2O) emissions in response to increasing fertilizer addition in maize (Zea mays L.) agriculture in western Kenya Nutrient Cycling in Agroecosystems 100 (2): 177-187 [10.1007/s10705-014-9636-7]

Scholes, R. J., C. A. Palm, and J. E. Hickman. 2014. Agriculture and climate change mitigation in the developing world CCAFS Working Paper no. 59. CGIAR Research Program on Climate Change, Agriculture, and Food Security

Hickman, J. E., and M. T. Lerdau. 2013. Biogeochemical impacts of the northward expansion of kudzu under climate change: the importance of ecological context Ecosphere 4 (10): art121 [10.1890/es13-00142.1]

Hickman, J. E., I. W. Ashton, K. M. Howe, and M. T. Lerdau. 2013. The native–invasive balance: implications for nutrient cycling in ecosystems Oecologia 173 (1): 319-328 [10.1007/s00442-013-2607-x]

Hickman, J. E., M. Havlikova, C. Kroeze, and C. A. Palm. 2011. Current and future nitrous oxide emissions from African agriculture Current Opinion in Environmental Sustainability 3 (5): 370-378 [10.1016/j.cosust.2011.08.001]

Hickman, J. E., S. Wu, L. J. Mickley, and M. T. Lerdau. 2010. Kudzu (Pueraria montana) invasion doubles emissions of nitric oxide and increases ozone pollution Proceedings of the National Academy of Sciences 107 (22): 10115-10119 [10.1073/pnas.0912279107]


Hickman, J. E. 2015. Putting local food to the test Nature Geoscience 8 (11): 824-824 [10.1038/ngeo2579]

Hickman, J. E. 2015. Carbon Sequestration: Biology's Growing Role Nature Geoscience 8 173

Hickman, J. E. 2014. Carbon sinks and sinking tundra Nature Geoscience 7 784