منابع مشابه
Predictability and Dynamics of Geophysical Fluid Flows
The central objective of my research in this project is to understand the mathematical and physical connections between the bred-growing-mode and singular vector techniques recently developed for numerical weather prediction, the Lyapunov vectors and exponents of dynamical systems theory, and instability theories of geophysical fluid dynamics. My intent is to gain insight into fundamental mathe...
متن کاملEntropic Forces in Geophysical Fluid Dynamics
Theories and numerical models of atmospheres and oceans are based on classical mechanics with added parameterizations to represent subgrid variability. Reformulated in terms of derivatives of information entropy with respect to large scale configurations, we find systematic forces very different from those usually assumed. Two examples are given. We see that entropic forcing by ocean eddies sys...
متن کاملGeophysical Fluid Dynamics: a survival kit
If I change the rotation rate of Earth, what happens to the circulation? Start with Hadley cell; what is a relevant conserved quantity for air parcels uplifted by a Hadley cell? How does that relate to winds away from the equator? How does that related to winds in mid-latitude & in part, to meteorological activity there? Why is there a Hadley cell? If an air parcel in the northern hemisphere is...
متن کاملEfficient nonlinear data-assimilation in geophysical fluid dynamics
New ways of combining observations with numerical models are discussed in which the size of the state space can be very large, and the model can be highly nonlinear. Also the observations of the system can be related to the model variables in highly nonlinear ways, making this data-assimilation (or inverse) problem highly nonlinear. First we discuss the connection between data assimilation and ...
متن کاملEfficient fully nonlinear data assimilation for geophysical fluid dynamics
6 A potential problem with Ensemble Kalman Filter is the implicit Gaussian as7 sumption at analysis times. Here we explore the performance of a recently pro8 posed fully nonlinear particle filter on a high-dimensional but simplified ocean 9 model, in which the Gaussian assumption is not made. The model simulates 10 the evolution of the vorticity field in time, described by the barotropic vortic...
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ژورنال
عنوان ژورنال: Journal of Applied Mechanics
سال: 1981
ISSN: 0021-8936,1528-9036
DOI: 10.1115/1.3157711