个人简介

B.S., 1981, California State Polytechnic University Pomona Ph.D., 1988, University of California, San Diego, Scripps Institution of Oceanography Postdoctoral Scholar Woods Hole Oceanographic Institution-MIT Fellow at the Hanse Institute for Advanced Study, Delmenhorst, Germany, 1999; Visiting Professor, University of Oldenburg, 2002; Fellow at the Hanse Institute for Advanced Study in Germany, 2010-2011

研究领域

Analytical/Environmental

Trace element geochemistry, environmental analytical chemistry; techniques development for trace elements of both anthropogenic and natural origin in the environment; geochemical cycling of trace elements in the environment. My work is focused on identifying factors that control the exchange of trace elements between the dissolved, particulate and biogenic phases in both the marine and fresh water systems. The goal is to identify the processes that control cycling and trophic transfer of trace elements and trace contaminants in the environment. Toward this end, my group routinely measures trace elements and tracers in groundwater, seawater, sediments, particulates (both inorganic and biogenic) and icebergs. In order to make these measurements, we also develop analytical techniques for trace element analysis in aqueous, colloidal, and solid phases and design and build sampling equipment. We maintain a clean room facility, and a radiochemical analysis laboratory that includes multple coincidence counters for analysis of 223Ra and a 224Ra as well as 227Ac isotopes, and a low level Beta counter for 234Th analysis. We work closely with the departmental elemental mass spectrometry facility that includes two High Resolution Inductively Coupled Plasma Mass Spectrometers (HR-ICP-MS). My group is in the midst of a program to examine the impact of groundwater mixing and exchange at the terrestrial/ocean interface. Currently, this work is focused on characterizing the processes that lead to the production of Reactive Oxygen Species at the groundwater/seawater interface as a function of the oxidation of Fe(II). This work is part of a combined set of laboratory/field experiments with Dr. John Ferry’s research group. We have also participated in several NSF funded projects to evaluate the role of free drifting icebergs as a micronutrient source in the Southern Ocean. This work is part of a large collaborative program with Dr. Ken Smith at the Monterey Bay Aquarium Research Institute (MBARI). These projects involved the measurement of tracers of terrestrial material flux to the Southern Ocean and requires the development of specialized sampling equipment and new analytical methods. This work is part of a larger effort to characterize mechanisms of atmospheric CO2 sequestration in the Southern Ocean as a function of climate change (see figure).

近期论文

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Murphy S.A., Solomon B.M., Meng S., Copeland J.M., Shaw T.J., Ferry J.L. ""Geochemical Production of Reactive Oxygen Species From Biogeochemically Reduced Fe."" Env. Sci. Tech. 2014, 48: 3815–3821. Burns J.M., Pennington P.L., Sisco P.N., Frey R., Kashiwada S., Fulton M.H., Scott G.I., Decho A.W., Murphy C.J., Shaw T.J. , Ferry J.L. ""Surface Charge Controls the Fate of Au Nanorods in Saline Estuaries."" Env. Sci. Tech. 2013, 47: 12844-12851. Swanstrom J. A., Bruckman L. S., Pearl M., Simcock M., Abernathy E., Donaldson K., Richardson T. L., Shaw T. J., Myrick M. L. ""Taxonomic Classification of Phytoplankton with Multivariate Optical Computing, Part I: Design and Theoretical Performance of Multivariate Optical Elements."" Appl. Spec. 2013, 67(6): 620-629. Swanstrom J. A., Bruckman L. S., Pearl M., Simcock M., Abernathy E., Richardson T. L., Shaw T. J., Myrick M. L. ""Taxonomic Classification of Phytoplankton with Multivariate Optical Computing, Part II: Design and Experimental Protocol of a Shipboard Fluorescence Imaging Photometer."" Appl. Spec. 2013, 67(6): 630-639. Pearl M., Swanstrom J. A., Bruckman L. S., Abernathy E., Richardson T. L., Shaw, Sosik H., T. J., Myrick M. L. ""Taxonomic Classification of Phytoplankton with Multivariate Optical Computing, Part III: Demonstration."" Appl. Spec. 2013, 67(6): 640-649. Smith K.L. Jr.; Sherman, A.D.; Shaw, T.J.; Sprintall, J. ""Icebergs as Unique Lagrangian Ecosystems in Polar Seas."" Annu. Rev. Mar. Sci. 2013 5, 14.1–14.19. Vernet, M.; Smith, K.L. Jr.; Cefarelli, A.O.; Helly, J.J.; Kaufmann, R.S.; Lin, H.; Long, D.G.; Murray, A.E.; Robison, B.H.; Ruhl, T.J. Shaw, H.A.; Sherman, A.D.; Sprintall, J.; Stephenson, G.R. Jr.; Stuart, K.M.; Twining, B.S. ""Islands of ice: Influence of free-drifting Antarctic icebergs on pelagic marine ecosystems."" Oceanography 2012, 25(3): 38–39 Bruckman, L.S.; Richardson, T.L.; Swanstrom, J.A.; Donaldson, K.A.; Allora, M. Jr.; Shaw, T.J.; Myrick, M.L. ""Linear Discriminant Analysis of Single-Cell Fluorescence Excitation Spectra of Five Phytoplankton Species."" Appl. Spec. 2012, 66(1):, 60-65. Shaw, T.J.; Raiswell, R.W.; Hexel, C.R.; Vu, H.P.; Moore, W.S.; Dudgeon, R.; Smith, K.L. Jr. ""Input, composition, and potential impact of terrigenous material from free-drifting icebergs in the Weddell Sea."" Deep-Sea Res. II, 2011, 58, 1376–1383. Shaw, T.J.; Hexel, C.R.; Smith, K.L. Jr.; Sherman, A.D.; Dudgeon, R.; Vernet M.; Kaufmann, R. ""234Th –based carbon export around free-drifting icebergs in the Southern Ocean."" Deep-Sea Res. II 2011, 58, 1384–1391. Smith, K.L. Jr.; Sherman, A.D.; Shaw, T.J.; Murray, A.; Vernet, M.; Cefarelli, A.O. ""Carbon export associated with free-drifting icebergs in the Southern Ocean."" Deep-Sea Res. II 2011, 58, 1485-1496.