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Sciences and Exploration Directorate

Joaquín E Chaves

(SR. RESEARCH SCIENTIST)

Joaquín E Chaves's Contact Card & Information.
Email: joaquin.e.chavescedeno@nasa.gov
Phone: 301.286.7045
Org Code: 616
Address:
NASA/GSFC
 Mail Code 616.1
 Greenbelt, MD 20771
Employer: SCIENCE SYSTEMS AND APPLICATIONS INC

Brief Bio

I'm an oceanographer interested in ocean biogeochemistry and ocean color remote sensing. I'm currently a research scientist in the Ocean Ecology Branch Field Support Group. My current research focuses on in situ measurement protocols and uncertainty estimation in support of ocean color calibration and validation. I’m also interested in GPU-accelerated computing and visualization, machine learning, data science, and open source software. I’ve participated in various NASA co-sponsored oceanographic expeditions to all major ocean basins.

Email alias: joaquin.chaves@nasa.gov

 

Research Interests

Ocean Color

Ocean Biogeochemistry

Data Science and Machine Learning

Education

Ph.D.  2004, Graduate School of Oceanography, University of Rhode Island.
M.Sc. 1997,  Graduate School of Oceanography, University of Rhode Island.
B.Sc, 1991 Marine Biology, Universidad Nacional, Heredia, Costa Rica.

Positions/Employment

Senior Research Scientist

Science Systems & Applications Inc. - NASA Goddard Space Flight Center

October 2009 - Present

Postdoctoral Scholar

Brown University - Providence, RI

September 2007 - March 2009

Postdoctoral Associate

Ecosystems Center, Marine Biological Laboratory - Woods Hole, MA

September 2004 - August 2007

Associate Professor

Chemistry Department, Universidad Nacional de Costa Rica - Heredia, Costa Rica

June 2003 - August 2004

Awards


  • 2025 NASA GSFC Hydrosphere, Biosphere and Geophysics (HBG) Peer Award for Scientific/Technical Support: Ocean Ecology Laboratory, Field Support Group – Scott Freeman (Team Lead), Kelsey Allen, Joaquín Chaves, Harrison Smith, Vanessa Strohm, Ethan Taylor – Code 616


  • 2020 NASA GSFC Hydrosphere, Biosphere and Geophysics (HBG) Peer Award for Scientific Achievement: Joaquín Chaves – Code 616



Selected Publications

Refereed

2022. "Ocean Optics and Biogeochemistry Protocols for Satellite Ocean Colour Sensor Validation Volume 7.0. Aquatic Primary Productivity Field Protocols for Satellite Validation and Model Synthesis.", , 201 [Full Text] [http://dx.doi.org/10.25607/OBP-1835] [Book]

2018. "The GEOTRACES Intermediate Data Product 2017.", Chemical Geology, 493 210-223 [10.1016/j.chemgeo.2018.05.040] [Journal Article/Letter]

2018. "How the Distribution of Anthropogenic Nitrogen Has Changed in Narragansett Bay (RI, USA) Following Major Reductions in Nutrient Loads.", Estuaries and Coasts, 41 (8): 2260-2276 [10.1007/s12237-018-0435-2] [Journal Article/Letter]

2018. "The adsorption of dissolved organic carbon onto glass fiber filters and its effect on the measurement of particulate organic carbon: A laboratory and modeling exercise.", Limnology and Oceanography: Methods, [10.1002/lom3.10248] [Journal Article/Letter]

2015. "The GEOTRACES Intermediate Data Product 2014.", Marine Chemistry, 177 1-8 [10.1016/j.marchem.2015.04.005] [Journal Article/Letter]

2015. "Assessment of ocean color data records from MODIS-Aqua in the western Arctic Ocean.", Deep Sea Research Part II: Topical Studies in Oceanography, 118 (Part A): 32-43 [10.1016/j.dsr2.2015.02.011] [Journal Article/Letter]

2012. "Soil Carbon and Nutrient Changes Associated with Deforestation for Pasture in Southern Costa Rica.", Biotropica, 44 (5): 661-667 [10.1111/j.1744-7429.2012.00863.x] [Journal Article/Letter]

2011. "Runoff sources and land cover change in the Amazon: an end-member mixing analysis from small watersheds.", Biogeochemistry, 105 (1-3): 7-18 [10.1007/s10533-011-9597-8] [Journal Article/Letter]

2009. "Nitrogen Transformations in Flowpaths Leading from Soils to Streams in Amazon Forest and Pasture.", Ecosystems, 12 (6): 961-972 [10.1007/s10021-009-9270-4] [Journal Article/Letter]

2008. "Land management impacts on runoff sources in small Amazon watersheds.", Hydrological Processes, 22 (12): 1766-1775 [10.1002/hyp.6803] [Journal Article/Letter]

Non-Refereed

2016. "Report for dedicated JPSS VIIRS Ocean Color December 2015 Calibration/Validation Cruise.", NOAA technical report NESDIS, [http://doi.org/10.7289/V5/TR-NESDIS-148] [Report]

2014. "Assessment of ocean color data records from MODIS-Aqua in the western Arctic Ocean.", Proc. Ocean Optics XXII, [Proceedings]

Contact Us

For general inquiries about the Sciences and Exploration Directorate.

Jocelyn Lynch

Project Support Specialist

301-286-6066 jocelyn.m.lynch@nasa.gov
Ellie Jeffries

Project Support Specialist

301-286-6066 ellie.jeffries@nasa.gov
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