Bonita L. Samuels

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This paper summarizes the formulation of the ocean component to the Geophysical Fluid Dynamics Laboratory’s (GFDL) climate model used for the 4th IPCC Assessment (AR4) of global climate change. In particular, it reviews the numerical schemes and physical parameterizations that make up an ocean climate model and how these schemes are pieced together for use(More)
Coordinated Ocean-ice Reference Experiments (COREs) Stephen M. Griffies *, Arne Biastoch , Claus Böning , Frank Bryan , Gokhan Danabasoglu , Eric P. Chassignet , Matthew H. England , Rüdiger Gerdes , Helmuth Haak , Robert W. Hallberg , Wilco Hazeleger , Johann Jungclaus , William G. Large , Gurvan Madec , Anna Pirani , Bonita L. Samuels , Markus Scheinert ,(More)
The current generation of coupled climate models run at the Geophysical Fluid Dynamics Laboratory (GFDL) as part of the Climate Change Science Program contains ocean components that differ in almost every respect from those contained in previous generations of GFDL climate models. This paper summarizes the new physical features of the models and examines(More)
The impact of changes in shortwave radiation penetration depth on the global ocean circulation and heat transport is studied using the GFDL Modular Ocean Model (MOM4) with two independent parameterizations that use ocean color to estimate the penetration depth of shortwave radiation. Ten to eighteen percent increases in the depth of 1% downwelling surface(More)
This paper documents time mean simulation characteristics from the ocean and sea ice components in a new coupled climate model developed at NOAA’s Geophysical Fluid Dynamics Laboratory (GFDL). The climate model, known as CM3, is formulated with effectively the same ocean and sea ice components as the earlier GFDL climate model, CM2.1, yet with extensive(More)
[1] The impact of the penetration length scale of shortwave radiation into the surface ocean is investigated with a fully coupled ocean, atmosphere, land and ice model. Oceanic shortwave radiation penetration is assumed to depend on the chlorophyll concentration. As chlorophyll concentrations increase the distribution of shortwave heating becomes shallower.(More)
In many global ocean climate models, mesoscale eddies are parameterized as along isopycnal diffusion and eddyinduced advection (or equivalently skew-diffusion). The eddy-induced advection flattens isopycnals and acts as a sink of available potential energy, whereas the isopycnal diffusion mixes tracers along neutral directions. While much effort has gone(More)
A simple model of the temperature-dependent biological decay of dissolved oil is embedded in an oceanclimate model and used to simulate underwater plumes of dissolved and suspended oil originating from a point source in the northern Gulf of Mexico, with an upper-bound supply rate estimated from the contemporary analysis of the Deepwater Horizon blowout. The(More)
[1] This paper considers the impact of the parameterization of subgridscale mixing on ocean heat transport in coarseresolution ocean models of the type used in coupled climate models. Increasing the vertical diffusion increases poleward heat transport in both hemispheres. Increasing lateral diffusion associated with transient eddies increases poleward heat(More)
Desmoid tumors frequently reoccur after surgery and radiation. The therapy of recurrent desmoid tumors is often unsatisfactory. Additional surgery may not be feasible. Drug therapy can sometimes be helpful, and even remarkably successful. Unfortunately, the rarity of desmoids precludes conduct of large clinical trials. Most series are small, anecdotal, and(More)