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.
Atmosphere-ecosystem interactions and feedbacks
Earth system modeling
Biogeochemical cycling
Climate and global change
GISS ModelE development
Construction, expansion and evaluation of the GISS ModelE coupled GCM.
COVID-19 climate impacts
Experimental analyses of short- and long-term impacts of lockdowns on atmospheric composition and climate using the GISS ModelE
Freeze/thaw agricultural soil nitric oxide emissions
Interactions and feedbacks between climate and exchange of nitric oxide and ammonia with soils and vegetation
B.A. English, Studio Art (Hons), Vassar College, 1995
PhD in Ecology and Evolution, State University of New York at Stony Brook, 2009
Refereed
Hickman, J. E., N. Andela, E. Dammers, et al. 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. 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. 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. 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. 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. 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., N. Andela, E. Dammers, et al. 2020. "Changes in biomass burning, wetland extent, or agriculture drive atmospheric NH3 trends in several African regions."
Atmospheric Chemistry and Physics Discussions,
(Submitted)
[10.5194/acp-2020-945]
Hickman, J. E., S. Zingore, C. Galy-Lacaux, et al. 2020. "Assessing Synergies and Trade-Offs from Nitrogen Use in Africa."
Just Enough Nitrogen,
Switzerland: Springer International Publishing
[10.1007/978-3-030-58065-0]
Field, R. D., J. E. Hickman, I. V. Geogdzhayev, K. Tsigaridis, and S. E. Bauer. 2020. "Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns."
Atmospheric Chemistry and Physics Discussions,
(Submitted)
[10.5194/acp-2020-567]
Huddell, A. M., G. L. Galford, K. L. Tully, et al. 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. 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. 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. 2016. "Introduction to the SAMPLES Approach."
Methods for Measuring Greenhouse Gas Balances and Evaluating Mitigation Options in Smallholder Agriculture,
New York: Springer International Publishing, 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]
Non-Refereed
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.
Refereed
Hickman, J. E., N. Andela, E. Dammers, et al. 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. 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. 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. 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. 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. 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., N. Andela, E. Dammers, et al. 2020. "Changes in biomass burning, wetland extent, or agriculture drive atmospheric NH3 trends in several African regions."
Atmospheric Chemistry and Physics Discussions
(Submitted)
[10.5194/acp-2020-945]
Hickman, J. E., S. Zingore, C. Galy-Lacaux, et al. 2020. "Assessing Synergies and Trade-Offs from Nitrogen Use in Africa."
Just Enough Nitrogen
[10.1007/978-3-030-58065-0]
Field, R. D., J. E. Hickman, I. V. Geogdzhayev, K. Tsigaridis, and S. E. Bauer. 2020. "Changes in satellite retrievals of atmospheric composition over eastern China during the 2020 COVID-19 lockdowns."
Atmospheric Chemistry and Physics Discussions
(Submitted)
[10.5194/acp-2020-567]
Huddell, A. M., G. L. Galford, K. L. Tully, et al. 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. 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. 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. 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]
Non-Refereed
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
