T
Thomas M. Powell
Researcher at University of California, Berkeley
Publications - 76
Citations - 7200
Thomas M. Powell is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Population & Bay. The author has an hindex of 38, co-authored 76 publications receiving 6718 citations. Previous affiliations of Thomas M. Powell include United States Geological Survey & University of California, Davis.
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Journal ArticleDOI
Ocean forecasting in terrain-following coordinates: Formulation and skill assessment of the Regional Ocean Modeling System
Dale B. Haidvogel,Hernan G. Arango,W. P. Budgell,Bruce D. Cornuelle,Enrique N. Curchitser,E. Di Lorenzo,Katja Fennel,W. R. Geyer,Albert J. Hermann,L. Lanerolle,Julia Levin,James C. McWilliams,Arthur J. Miller,Andrew M. Moore,Thomas M. Powell,Alexander F. Shchepetkin,Christopher R. Sherwood,Richard P. Signell,John C. Warner,John Wilkin +19 more
TL;DR: The combination of moderate-order spatial approximations, enhanced conservation properties, and quasi-monotone advection produces both more robust and accurate, and less diffusive, solutions than those produced in earlier terrain-following ocean models.
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North Pacific Gyre Oscillation links ocean climate and ecosystem change
E. Di Lorenzo,Niklas Schneider,Kim M. Cobb,Peter Franks,Kettyah C. Chhak,Arthur J. Miller,James C. McWilliams,Steven J. Bograd,Hernan G. Arango,Enrique N. Curchitser,Thomas M. Powell,Pascal Rivière +11 more
TL;DR: The North Pacific Gyre Oscillation (NPGO) as mentioned in this paper is the most widely used index of large-scale climate variability in the Northeast Pacific region and has been shown to be correlated with previously unexplained fluctuations of salinity, nutrients, chlorophyll, and zooplankton taxa.
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Chaos in a Three-Species Food Chain
Alan Hastings,Thomas M. Powell +1 more
TL;DR: In this article, a continuous time model of a food chain incorporating nonlinear functional (and numerical) responses exhibits chaotic dynamics in long-term behavior when biologically reasonable parameter values are chosen.
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Isohaline Position as a Habitat Indicator for Estuarine Populations
Alan D. Jassby,William J. Kimmerer,Stephen G. Monismith,Charles Armor,James E. Cloern,Thomas M. Powell,Jerry R. Schubel,Timothy J. Vendlinski +7 more
TL;DR: Populations of native and introduced aquatic organisms in the San Francisco Bay/Sacramento- San Joaquin Delta Estuary have undergone significant declines over the past two decades, and uncertainty analysis can identify the most practical direction for future data acquisition.
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Vertical patterns of eddy diffusion during stratification in Castle Lake, California1
Alan D. Jassby,Thomas M. Powell +1 more
TL;DR: The vertical eddy diffusivity for heat, Kz, which characterizes the intensity of vertical mixing, was estimated for depths below the epilimnion in Castle Lake, California, calculated from a series of temperature profiles collected during summer 1972 suitably corrected for solar radiation absorption.