Jeremy Werdell @ NASA Goddard Space Flight Center
Jeremy Werdell @ NASA Goddard Space Flight Center
PACE Project Scientist & Oceanographer in the Ocean Biology Processing Group (616) at Goddard Space Flight Center
My so-called "expertise" lies in the realm of ocean color satellites and bio-optical remote sensing. Specifically: the on-orbit calibration of these satellites and the validation of their data products; the development and evaluation of marine bio-optical algorithms; the collection and analysis of in situ biogeochemical oceanographic measurements; and the assimilation of the above to study how the global ocean and various regional ecosystems are changing with time. I occasionally sneak away from the office to teach or act as a student mentor, or escape completely to present our work and ongoing analyses. While recuperating from such scientific endeavors or unable to sail upon favorite locales, I remain dedicated to maritime pursuits by preparing and consuming significant quantities of local fish and shellfish.
ContactNASA Goddard Space Flight Center
Mail Code 616.2
Greenbelt, Maryland 20771, USA
jeremy dot werdell at nasa dot gov
SED Earth Sciences Division staff page
EducationDoctor of Philosophy, Oceanography, 2014
University of Maine
Master of Science, Oceanography, 1998
University of Connecticut
Bachelor of Arts, Biology/Environmental Science, 1996
University of Virginia
Selected publications and proceedings2016
J.E. Chaves, P.J. Werdell, C.W. Proctor, A.R. Neeley, S.A. Freeman, C.S. Thomas, and S.B. Hooker, "Assessment of ocean color data records from MODIS-Aqua in the western Arctic Ocean", Deep Sea Research II, doi:10.1016/j.dsr2.2015.02.011 (2015).
L. I.W. McKinna, P.R.C. Fearns, S.J. Weeks, P.J. Werdell, M. Reichstetter, B.A. Franz, D.M. Shea, and G.C. Feldman, "A semianalytical ocean color inversion algorithm with explicit water column depth and substrate reflectance parameterization", Journal of Geophysical Research 120, 1741-1770, doi:10.1002/2014JC010224 (2015).
B.A Franz, S.W. Bailey, N. Kuring, and P.J. Werdell, "Ocean color measurements with the Operational Land Imager on Landsat-8: implementation and evaluation in SeaDAS", Journal of Applied Remote Sensing 9, doi:10.1117/I.JRS.9.096070 (2015).
B.A Franz, M.J. Behrenfeld, D.A. Siegel, and P.J. Werdell, "Global ocean phytoplankton", State of the Climate 2014, Bulletin of the American Meteorological Society, 585-587 (2015).
B.A Franz, M.J. Behrenfeld, D.A. Siegel, and P.J. Werdell, "Global ocean phytoplankton", State of the Climate 2013, Bulletin of the American Meteorological Society, 578-580 (2014).
P.S. Thibodeau, C.S. Roesler, S. Drapeau, P. Matondkar, J.I Goes, and P.J. Werdell, "Locating Noctiluca miliaris in the Arabian Sea: An optical proxy approach", Limnology and Oceanography 59, 2042-2056 (2014).
P.J. Werdell, C.W. Proctor, E. Boss, T. Leeuw, and M. Ouhssain, "Underway sampling of marine inherent optical properties on the Tara Oceans expedition as a novel resource for ocean color satellite data product validation", Methods in Oceanography 7, 40-51 (2013).
R.J.W. Brewin, S. Sathyendranath, 21 co-authors,P.J. Werdell, and G.N. White III, "The Ocean Colour Climate Change Initiative: III. A round-robin comparison on in-water bio-optical algorithms", Remote Sensing of Environment, doi:10.1016/j.rse.2013.09.016 (2013).
B.A. Franz, M.J. Behrenfeld, D.A. Siegel, and P.J. Werdell, "Global ocean phytoplankton", State of the Climate 2012, Bulletin of the American Meteorological Society, 575-578 (2013).
P.J. Werdell, B.A. Franz, S.W. Bailey, G.C. Feldman and 15 co-authors, "Generalized ocean color inversion model for retrieving marine inherent optical properties", Applied Optics 52, 2019-2037 (2013).
D.A. Siegel, M.J. Behrenfeld, 20 co-authors, P.J. Werdell, T.K. Westberry, J.G. Wilding, and J.A. Yoder, "Regional to global assessments of phytoplankton dynamics from the SeaWiFS mission", Remote Sensing of Environment 135, 77-91 (2013).
M.J. Sauer, C.S. Roesler, P.J. Werdell, and A. Barnard, "Under the hood of satellite empirical chlorophyll algorithms: revealing the dependencies of maximum band ratio algorithms on inherent optical properties", Optics Express 20, 20920-20933 (2012).
M.S. Salama, R. Van der Velde, H.J. van der Woerd, J.C. Kromkamp, C.J.M. Philippart, A.T. Joseph, P.E. O'Neill, R.H. Lang, T. Gish, P.J. Werdell, and Z.Su, "Calibration and validation of geophysical observation models", Biogeosciences 9, 2195-2201 (2012).
M. Szeto, P.J. Werdell, T.S. Moore, and J.W. Campbell, "Are the world's oceans optically different?", Journal of Geophysical Research 116, C00H04, doi:10.1029/2011JC007230 (2011).
Z. Ahmad, B.A. Franz, C.R. McClain, E.J. Kwiatkowska, P.J. Werdell, E.P. Shettle, and B.N. Holben, "New aerosol models for the retrieval of aerosol optical thickness and normalized water-leaving radiances from the SeaWiFS and MODIS sensors over coastal regions and open oceans", Applied Optics 49, 5545-5560 (2010).
S.W. Bailey, B.A. Franz, and P.J. Werdell, "Estimation of near-infrared water-leaving reflectance for satellite ocean color data processing", Optics Express 18, 7521-7527 (2010).
R.P. Stumpf and P.J. Werdell, "Adjustment of ocean color sensor calibration through multi-band statistics", Optics Express 18, 401-412 (2010).
Z-P. Lee, R. Arnone, C. Hu, P.J. Werdell, and B. Lubac, "Uncertainties of optical parameters and their propagations in an analytical ocean color inversion algorithm", Applied Optics 49, 369-381 (2010).
P.J. Werdell, "Global bio-optical algorithms for ocean color satellite applications", EOS Transactions AGU (Meeting Report) 90, 4 (2009).
M.M.P.B. Fuentes, J.A. Maynard, M. Guinea, I.P. Bell, P.J. Werdell, and M. Hamann, "Proxy indicators of sand temperature help project impacts of global warming on sea turtles", Endangered Species Research 9, 33-40 (2009).
S.W. Bailey, S.B. Hooker, D. Antoine, B.A. Franz, and P.J. Werdell, "Sources and assumptions for the vicarious calibration of ocean color satellite observations", Applied Optics 47(12), 2035-2045 (2008).
B.A. Franz, S.W. Bailey, P.J. Werdell, and C.R. McClain, "Sensor-independent approach to the vicarious calibration of satellite ocean color radiometry", Applied Optics 46(22), 5068-5082 (2007).
A. Morel, Y. Huot, B. Gentili, P.J. Werdell, S.B. Hooker, and B.A. Franz, "Examining the consistency of products derived from various ocean color sensors in open ocean (Case 1) waters in the perspective of a multi-sensor approach", Remote Sensing of Environment 111, 69-88 (2007).
P.J. Werdell, B.A. Franz, S.W. Bailey, L.W. Harding Jr., and G.C. Feldman, "Approach for the long-term spatial and temporal evaluation of ocean color satellite data products in a coastal environment", Proceedings of SPIE 6680, doi:10.1117/12.732489 (2007).
P.J. Werdell and S.W. Bailey, "An improved in-situ bio-optical data set for ocean color algorithm development and satellite data product validation", Remote Sensing of Environment 98, 122-140 (2005).
B.A. Franz, P.J. Werdell, and 8 co-authors, "The continuity of ocean color measurements from SeaWiFS to MODIS", Proceedings of SPIE 5882, doi:10.1117/12.620069 (2005).
P.J. Werdell, S. Bailey, G. Fargion, C. Pietras, K. Knobelspiesse, G. Feldman, and C. McClain, "Unique data repository facilitates ocean color satellite validation", EOS Transactions AGU 84(38), 379 (2003).
P.J. Werdell and C.S. Roesler, "Remote assessment of benthic substrate composition in shallow waters using multispectral reflectance", Limnology and Oceanography 48(1, part 2), 557-567 (2003).
P.J. Werdell and S.W. Bailey, "The SeaWiFS Bio-optical Archive and Storage System (SeaBASS): Current architecture and implementation", NASA/TM-2002-211617, NASA Goddard Space Flight Center, Greenbelt, MD, 45 pp. (2002).
Teaching ExperienceInstructor, Calibration and Validation for Ocean Color Remote Sensing
University of Maine Ira C. Darling Marine Center, Walpole, ME, Jul 2011/Jul 2013/Jul 2015
Instructor, Vernon/Bolton (Middle School) Bermuda Workshop
Bermuda Institute for Ocean Sciences, St. George's, Bermuda, Jul 2003 - present
Adjunct Instructor, Introduction to Marine Sciences
Three Rivers Community-Technical College, Norwalk, Connecticut, Jan - Jun 1999