Sciences and Exploration Directorate

Joaquin E Chaves


Joaquin E Chaves's Contact Card & Information.
Phone: 301.286.7045
Org Code: 616
Mail Code 616.1
Greenbelt, MD 20771

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:



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.

Selected Publications


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]


2016. "Report for dedicated JPSS VIIRS Ocean Color December 2015 Calibration/Validation Cruise." NOAA technical report NESDIS [] [Report]

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