Sciences and Exploration Directorate

Helen M Amos



Org Code: 610

Mail Code: 610
Greenbelt, MD 20771


Brief Bio

Dr. Helen Amos is an Applications Scientist on the Goddard Applied Sciences team. Her role is to facilitate the use of Goddard research and data products toward addressing environmental health challenges. Her current focus is on climate, air quality, and natural disasters. Previously at NASA, Dr. Amos was the Science Outreach Lead for GLOBE Observer. She was in environmental consulting before starting her career in government. Dr. Amos received her PhD in atmospheric chemistry from Harvard University, postdoc'd at the Harvard TH Chan School of Public Health, and did a AAAS Science & Technology Policy Fellow at the US Environmental Protection Agency.  ORCiD 0000-0002-0297-6643.



Amos, H. M., M. J. Starke, T. M. Rogerson, et al. M. Colón Robles, T. Andersen, R. Boger, B. A. Campbell, R. D. Low, P. Nelson, D. Overoye, J. E. Taylor, K. L. Weaver, T. M. Ferrell, H. Kohl, and T. G. Schwerin. 2020. GLOBE Observer Data: 2016–2019 Earth and Space Science 7 (8): [10.1029/2020ea001175]

Robles, M. C., H. M. Amos, J. B. Dodson, et al. J. Bouwman, T. Rogerson, A. Bombosch, L. Farmer, A. Burdick, J. Taylor, and L. H. Chambers. 2020. Clouds Around the World: How a Simple Citizen Science Data Challenge Became a Worldwide Success Bulletin of the American Meteorological Society 101 (7): 1201-1213 []

Amos, H. M., K. Kuhn, S. Patel, et al. R. Gordon, C. Nelson, and J. Benforado. 2019. Integrating Open Innovation into the Core of Federal R&D Strategy Journal of Science Policy & Governance 15 (1):

Walker, J. T., G. M. Beachley, H. M. Amos, et al. J. S. Baron, J. Bash, R. Baumgardner, M. D. Bell, K. B. Benedict, X. Chen, D. W. Clow, A. Cole, J. G. Coughlin, K. Cruz, R. W. Daly, S. M. Decina, E. M. Elliot, M. E. Fenn, L. Ganzeveld, K. Gebhart, S. S. Isil, B. M. Kerschner, R. S. Larson, T. Lavery, G. G. Lear, T. Macy, M. A. Mast, K. Mishoe, K. H. Morris, P. E. Padgett, R. V. Pouyat, M. Puchalski, H. O. Pye, A. W. Rea, M. F. Rhodes, C. M. Rogers, R. Saylor, R. Scheffe, B. A. Schichtel, D. B. Schwede, G. A. Sexstone, B. C. Sive, P. H. Templer, T. Thompson, D. Tong, G. A. Wetherbee, T. H. Whitlow, Z. Wu, Z. Yu, and L. Zhang. 2019. Science needs for continued development of total nitrogen deposition budgets in the United States Science of the Total Environment 691 1328-1352 []

St. Louis, V., J. G. , I. L. , et al. H. M. Amos, E. Sunderland, K. St. Pierre, C. Emmerton, K. Sandilands, M. Tate, A. Steffen, and E. Humphreys. 2019. Atmospheric concentrations and wet/dry loadings of mercury at the remote Experimental Lakes Area, northwestern Ontario, Canada Environmental Science & Technology 53 (14): 8017-8026 []

Wagner, C. C., H. M. Amos, C. P. Thackray, et al. Y. Zhang, E. W. Lundgren, G. Forget, C. L. Friedman, N. E. Selin, R. Lohmann, and E. M. Sunderland. 2019. A global 3-D ocean model for polychlorinated biphenyls (PCBs): Benchmark compounds for understanding the impacts of global change on neutral persistent organic pollutants Global Biogeochemical Cycles [10.1029/2018gb006018]

Sun, R., M. Jiskra, H. M. Amos, et al. Y. Zhang, E. M. Sunderland, and J. E. Sonke. 2019. Modelling the mercury stable isotope distribution of Earth surface reservoirs: Implications for global Hg cycling Geochimica et Cosmochimica Acta 246 156-173 [10.1016/j.gca.2018.11.036]

Amos, H. M., C. F. Miniat, J. Lynch, et al. J. Compton, P. H. Templer, L. A. Sprague, D. Shaw, D. Burns, A. Rea, D. Whitall, L. Myles, D. Gay, M. Nilles, J. Walker, A. K. Rose, J. Bales, J. Deacon, and R. Pouyat. 2018. What Goes Up Must Come Down: Integrating Air and Water Quality Monitoring for Nutrients Environmental Science & Technology 52 (20): 11441-11448 [10.1021/acs.est.8b03504]

Horowitz, H. M., D. J. Jacob, Y. Zhang, et al. T. S. Dibble, F. Slemr, H. M. Amos, J. A. Schmidt, E. S. Corbitt, E. A. Marais, and E. M. Sunderland. 2017. A new mechanism for atmospheric mercury redox chemistry: implications for the global mercury budget Atmospheric Chemistry and Physics 17 (10): 6353-6371 [10.5194/acp-17-6353-2017]

Kocman, D., S. Wilson, H. Amos, et al. K. Telmer, F. Steenhuisen, E. Sunderland, R. Mason, P. Outridge, and M. Horvat. 2017. Toward an Assessment of the Global Inventory of Present-Day Mercury Releases to Freshwater Environments International Journal of Environmental Research and Public Health 14 (2): 138 [10.3390/ijerph14020138]

Sun, R., D. G. Streets, H. M. Horowitz, et al. H. M. Amos, G. Liu, V. Perrot, J.-P. Toutain, H. Hintelmann, E. M. Sunderland, and J. E. Sonke. 2016. Historical (1850–2010) mercury stable isotope inventory from anthropogenic sources to the atmosphere Elementa: Science of the Anthropocene 4 000091 [10.12952/journal.elementa.000091]

Zhang, Y., D. J. Jacob, H. M. Horowitz, et al. L. Chen, H. M. Amos, D. P. Krabbenhoft, F. Slemr, V. L. St. Louis, and E. M. Sunderland. 2016. Observed decrease in atmospheric mercury explained by global decline in anthropogenic emissions Proceedings of the National Academy of Sciences 113 (3): 526-531 [10.1073/pnas.1516312113]

Zhang, Y., D. J. Jacob, S. Dutkiewicz, et al. H. M. Amos, M. S. Long, and E. M. Sunderland. 2015. Biogeochemical drivers of the fate of riverine mercury discharged to the global and Arctic oceans Global Biogeochemical Cycles 29 (6): 854-864 [10.1002/2015gb005124]

Gustin, M. S., H. M. Amos, J. Huang, M. B. Miller, and K. Heidecorn. 2015. Measuring and modeling mercury in the atmosphere: a critical review Atmospheric Chemistry and Physics 15 (10): 5697-5713 [10.5194/acp-15-5697-2015]

Amos, H. M., J. E. Sonke, D. Obrist, et al. N. Robins, N. Hagan, H. M. Horowitz, R. P. Mason, M. Witt, I. M. Hedgecock, E. S. Corbitt, and E. M. Sunderland. 2015. Observational and Modeling Constraints on Global Anthropogenic Enrichment of Mercury Environmental Science & Technology 49 (7): 4036-4047 [10.1021/es5058665]

Weiss-Penzias, P., H. M. Amos, N. E. Selin, et al. M. S. Gustin, D. A. Jaffe, D. Obrist, G.-R. Sheu, and A. Giang. 2015. Use of a global model to understand speciated atmospheric mercury observations at five high-elevation sites Atmospheric Chemistry and Physics 15 (3): 1161-1173 [10.5194/acp-15-1161-2015]

Horowitz, H. M., D. J. Jacob, H. M. Amos, D. G. Streets, and E. M. Sunderland. 2014. Historical Mercury Releases from Commercial Products: Global Environmental Implications Environmental Science & Technology 48 (17): 10242-10250 [10.1021/es501337j]

Amos, H. M., D. J. Jacob, D. Kocman, et al. H. M. Horowitz, Y. Zhang, S. Dutkiewicz, M. Horvat, E. S. Corbitt, D. P. Krabbenhoft, and E. M. Sunderland. 2014. Global Biogeochemical Implications of Mercury Discharges from Rivers and Sediment Burial Environmental Science & Technology 48 (16): 9514-9522 [10.1021/es502134t]

Jaffe, D. A., S. Lyman, H. M. Amos, et al. M. S. Gustin, J. Huang, N. E. Selin, L. Levin, A. ter Schure, R. P. Mason, R. Talbot, A. Rutter, B. Finley, L. Jaeglé, V. Shah, C. McClure, J. Ambrose, L. Gratz, S. Lindberg, P. Weiss-Penzias, G.-R. Sheu, D. Feddersen, M. Horvat, A. Dastoor, A. J. Hynes, H. Mao, J. E. Sonke, F. Slemr, J. A. Fisher, R. Ebinghaus, Y. Zhang, and G. Edwards. 2014. Progress on Understanding Atmospheric Mercury Hampered by Uncertain Measurements Environmental Science & Technology 48 (13): 7204-7206 [10.1021/es5026432]

Sofen, E. D., B. Alexander, E. J. Steig, et al. M. H. Thiemens, S. A. Kunasek, H. M. Amos, A. J. Schauer, M. G. Hastings, J. Bautista, T. L. Jackson, L. E. Vogel, J. R. McConnell, D. R. Pasteris, and E. S. Saltzman. 2014. WAIS Divide ice core suggests sustained changes in the atmospheric formation pathways of sulfate and nitrate since the 19th century in the extratropical Southern Hemisphere Atmospheric Chemistry and Physics 14 (11): 5749-5769 [10.5194/acp-14-5749-2014]

Fisher, J. A., D. J. Jacob, A. L. Soerensen, et al. H. M. Amos, E. S. Corbitt, D. G. Streets, Q. Wang, R. M. Yantosca, and E. M. Sunderland. 2013. Factors driving mercury variability in the Arctic atmosphere and ocean over the past 30 years Global Biogeochemical Cycles 27 (4): 1226-1235 [10.1002/2013gb004689]

Amos, H. M., D. J. Jacob, D. G. Streets, and E. M. Sunderland. 2013. Legacy impacts of all-time anthropogenic emissions on the global mercury cycle Global Biogeochemical Cycles 27 (2): 410-421 [10.1002/gbc.20040]

Schauer, A. J., S. A. Kunasek, E. D. Sofen, et al. J. Erbland, J. Savarino, B. W. Johnson, H. M. Amos, R. Shaheen, M. Abaunza, T. L. Jackson, M. H. Thiemens, and B. Alexander. 2012. Oxygen isotope exchange with quartz during pyrolysis of silver sulfate and silver nitrate Rapid Communications in Mass Spectrometry 26 (18): 2151-2157 [10.1002/rcm.6332]

Zhang, Y., L. Jaeglé, A. van Donkelaar, et al. R. V. Martin, C. D. Holmes, H. M. Amos, Q. Wang, R. Talbot, R. Artz, S. Brooks, W. Luke, T. M. Holsen, D. Felton, E. K. Miller, K. D. Perry, D. Schmeltz, A. Steffen, R. Tordon, P. Weiss-Penzias, and R. Zsolway. 2012. Nested-grid simulation of mercury over North America Atmospheric Chemistry and Physics 12 (14): 6095-6111 [10.5194/acp-12-6095-2012]

Fisher, J. A., D. J. Jacob, A. L. Soerensen, et al. H. M. Amos, A. Steffen, and E. M. Sunderland. 2012. Riverine source of Arctic Ocean mercury inferred from atmospheric observations Nature Geoscience 5 (7): 499-504 [10.1038/ngeo1478]

Alexander, B., D. J. Allman, H. M. Amos, et al. T. D. Fairlie, J. Dachs, D. A. Hegg, and R. S. Sletten. 2012. Isotopic constraints on the formation pathways of sulfate aerosol in the marine boundary layer of the subtropical northeast Atlantic Ocean Journal of Geophysical Research: Atmospheres 117 (D6): [10.1029/2011jd016773]

Amos, H. M., D. J. Jacob, C. D. Holmes, et al. J. A. Fisher, Q. Wang, R. M. Yantosca, E. S. Corbitt, E. Galarneau, A. P. Rutter, M. S. Gustin, A. Steffen, J. J. Schauer, J. A. Graydon, V. L. Louis, R. W. Talbot, E. S. Edgerton, Y. Zhang, and E. M. Sunderland. 2012. Gas-particle partitioning of atmospheric Hg(II) and its effect on global mercury deposition Atmospheric Chemistry and Physics 12 (1): 591-603 [10.5194/acp-12-591-2012]

Kunasek, S. A., B. Alexander, E. J. Steig, et al. E. D. Sofen, T. L. Jackson, M. H. Thiemens, J. R. McConnell, D. J. Gleason, and H. M. Amos. 2010. Sulfate sources and oxidation chemistry over the past 230 years from sulfur and oxygen isotopes of sulfate in a West Antarctic ice core Journal of Geophysical Research 115 (D18): D18313 [10.1029/2010jd013846]


Keller, C. A., H. M. Amos, V. J. Buchard, et al. A. S. Darmenov, S. Shen, M. D. Knoll, F. Villavicencio, and M. G. Bosilovich. 2021. File Specification for MERRA-2 Country-Level Surface PM2.5 Monthly Mean Products GMAO Office Note No. 20 (Version 1.0): 10


Harvard University, Department of Earth & Planetary Sciences, PhD, 2009-2014.

University of Washington, Department of Atmospheric Sciences, BS, 2005-2009. 


Supervisory Research Scientist

Science Systems and Applications, Inc. - NASA Goddard Space Flight Center, Greenbelt, MD

October 2022 - Present

Lead Research Scientist

Science Systems and Applications, Inc. - NASA Goddard Space Flight Center, Greenbelt, Maryland

May 2022 - September 2022

Senior Research Scientist

Science Systems and Applications, Inc. - NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

October 2018 - April 2022

AAAS Science & Technology Policy Fellow

US Environmental Protection Agency - Washington, DC, USA

October 2016 - September 2018

Research Scientist

Amos Environmental, LLC - Washington, DC, USA

March 2016 - September 2016

Postdoctoral Fellow

Harvard University, TH Chan School of Public Health - Cambridge, Massachusetts, USA

July 2014 - February 2016


NASA Robert H. Goddard Award - Science, 2023

Science Systems and Applications, Inc. (SSAI) Performance Award - Customer, 2022

NASA Goddard Space Flight Center (GSFC), Exceptional Achievement for Mission and Enabling Support, Applied Sciences Team, 2022

NASA Agency Honor Award, Group Achievement, The GLOBE Program, 2021

Science Systems and Applications, Inc. (SSAI) Performance Award, 2021

Science Systems and Applications, Inc. (SSAI) Early Career Award, 2019

National Science Foundation (NSF) Graduate Research Fellowship, 2011-2014

American Meteorological Society (AMS) Fellowship, sponsored by NASA’s Earth Science Division, 2009-2010

Washington Scholar, 2005-2009

Teaching Experience

Teaching Fellow for Engineering Sciences 169: Seminar on Global Pollution Issues: Case Study of Mercury Biogeochemistry, Professor Elsie M. Sunderland, Spring Semester 2013

Teaching Fellow for Earth & Planetary Sciences 200: Atmospheric Chemistry (Graduate Level), Harvard University, Professor Daniel J. Jacob, Fall Semester 2010

Teaching Fellow for Engineering Sceinces 6: Intro to Environmental Science and Technology (Undergraduate Level), Harvard University, Professor Scot Martin, Spring Semester 2011

Professional Societies

American Association for the Advancement of Science

2016 - Present

American Geophysical Union

2009 - Present

Earth Science Women's Network

2009 - Present

Earth Science Information Partners

GLOBE Representative

2019 - 2020

Citizen Science Association

2018 - 2020

Selected Public Outreach

Girl Scout Expo

December 2019 - December 2019

Outreach for The GLOBE Program. Expo was attended by 10,000 Girl Scouts and their familes.

NASA Earth Day

May 2019 - May 2019

NASA Earth Day Events at Union Station in downtown Washington, DC. Open to the public.

STEM Girls Night In

December 2018 - December 2018

High school-aged girls hosted at NASA Goddard Space Flight Center for an overnight experience with learning activities, team building, and face-to-face interactions with women scientists and engineers (and an astronaut!).