Polynomial Chaos (PC) expansions are used to propagate parametric uncertainties in an ocean general circulation model. The computations focus on shorttime, high-resolution simulations of the Gulf of Mexico (GOM), using the HYbrid Coordinate Ocean Model (HYCOM), with wind stresses corresponding to hurricane Ivan. A sparse quadrature approach is used to determine the PC coefficients which provide...

1. introduction climatic change is one of the most important challenges human beings have confronted with in recent centuries due to its severe effects on water resources, agriculture, energy, tourism and even human bioclimatic. developing strategies, making decisions with awareness about water consumption in different parts in the future, and available water resources management require climat...

A global ocean circulation model is formulated in terms of the “residual mean” and used to study eddy–mean flow interaction. Adjoint techniques are used to compute the three-dimensional eddy stress field that minimizes the departure of the coarse-resolution model from climatological observations of temperature. The resulting 3D maps of eddy stress and residual-mean circulation yield a wealth of...

In this paper we describe the parallelization of a local area ocean circulation model using HPF. We nd that this particular problem, leading to a typical data parallel algorithm is easily expressed in HPF. The problems which occurs is mainly due to restrictions in the current HPF-compilers. We have run our program on 3 diierent platforms, using diierent HPF-compilers. and will report on the sta...

A major impediment to understanding long-term changes in the marine nitrogen (N) cycle is the persistent uncertainty about the rates, distribution, and sensitivity of its largest fluxes in the modern ocean. We use a global ocean circulation model to obtain the first 3-D estimate of marine denitrification rates that is maximally consistent with available observations of nitrate deficits and the ...

The role of the Indonesian Throughflow (ITF) in the thermocline circulation of the low-latitude Pacific Ocean is explored using a high-resolution primitive equation ocean circulation model. Seasonally forced runs for a domain with an open Indonesian passage are compared with seasonally forced runs for a closed Pacific domain. Three cases are considered: one with no throughflow, one with 10 Sv o...