Search Results - "Lawless, A.S."

Conditioning and preconditioning of the variational data assimilation problem by Haben, S.A., Lawless, A.S., Nichols, N.K.

“…Numerical weather prediction (NWP) centres use numerical models of the atmospheric flow to forecast future weather states from an estimate of the current…”
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State estimation using model order reduction for unstable systems by Boess, C., Lawless, A.S., Nichols, N.K., Bunse-Gerstner, A.

“…The problem of state estimation occurs in many applications of fluid flow. For example, to produce a reliable weather forecast it is essential to find the best…”
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State estimation using the particle filter with mode tracking by Pocock, J.A., Dance, S.L., Lawless, A.S.

“…A particle filter is a data assimilation scheme that employs a fully nonlinear, non-Gaussian analysis step. Unfortunately as the size of the state grows the…”
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Integration of a 3D variational data assimilation scheme with a coastal area morphodynamic model of Morecambe Bay by Thornhill, G.D., Mason, D.C., Dance, S.L., Lawless, A.S., Nichols, N.K., Forbes, H.R.

“…This paper describes the implementation of a 3D variational (3D-Var) data assimilation scheme for a morphodynamic model applied to Morecambe Bay, UK. A simple…”
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An investigation of incremental 4D‐Var using non‐tangent linear models by Lawless, A. S., Gratton, S., Nichols, N. K.

“…We investigate the convergence of incremental four‐dimensional variational data assimilation (4D‐Var) when an approximation to the tangent linear model is used…”
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Four-dimensional variational data assimilation for high resolution nested models by Baxter, G.M., Dance, S.L., Lawless, A.S., Nichols, N.K.

“…Four-dimensional variational data assimilation (4D-Var) is used in environmental prediction to estimate the state of a system from measurements. When 4D-Var is…”
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