Tom Brown

Research Physicist, Lawrence Livermore National Laboratory; Affiliate Faculty, Quaternary Research Center

Email: tabrown@llnl.gov

Ph.D., University of Washington, 1994

Picture of Tom Brown

Tom Brown's research interests are based around the utilization of accelerator mass spectrometry in 14C-based studies related to global climate change and past climate variations, and the further development of AMS techniques for measurements of 14C and other isotopes.

The global climate studies have centered on the development of innovative 14C data sets to constrain/validate the coupled ocean-atmosphere general circulation climate models and global carbon cycle models that are used in efforts to predict the consequences of fossil fuel utilization. Paleoclimate studies have centered around the utilization of AMS 14C measurements to provide reliable, detailed chronologies for studies of past climates in Alaska and the Russian Far East over the last 50 ka, and studies of significant climate events in the Americas over the past 2 millennia. AMS developmental studies have centered on the computer modeling of high-intensity ion sources with the goal of significantly improving the performance of such ion sources, and the design of new ion beam transport system as a part of new initiatives to extend the capabilities of LLNL's Center for Accelerator Mass Spectrometry to new isotopes and applications of AMS technologies.

Selected Publications

T.A. Brown and G. Gillespie (submitted), Optics elements for modeling electrostatic lenses and accelerator components: II. Electrostatic Deflectors, Nucl. Instr. Meth.

A.V. Lozhkin, P.M. Anderson, S.L. Vartanyan, T.A. Brown, B.V. Belaya, and A.N. Kotov (in press), Late Quaternary Paleoenvironments and Modern Pollen Data from Wrangel Island (Northern Chukotka), Quaternary Science Reviews.

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