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Items where Author is "Lawless, Dr Amos"

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Number of items: 35.

Article

Waller, J. A., Dance, S. L., Lawless, A. S. and Nichols, N. K. (2014) Estimating correlated observation error statistics using an ensemble transform Kalman filter. Tellus Series A: Dynamic Meteorology and Oceanography, 66. 23294. ISSN 0280-6495 doi: 10.3402/tellusa.v66.23294

Waller, J. A., Dance, S. L., Lawless, A. S., Nichols, N. K. and Eyre, J. R. (2013) Representativity error for temperature and humidity using the Met Office high-resolution model. Quarterly Journal of the Royal Meteorological Society. ISSN 1477-870X doi: 10.1002/qj.2207

Smith, P. J., Thornhill, G. D., Dance, S. L., Lawless, A. S., Mason, D. C. and Nichols, N. K. (2013) Data assimilation for state and parameter estimation: application to morphodynamic modelling. Quarterly Journal of the Royal Meteorological Society, 139 (671 Part B). pp. 314-327. ISSN 1477-870X doi: 10.1002/qj.1944

Moodey, A. J. F., Lawless, A. S., Potthast, R. W. E. and Van Leeuwen, P. J. (2013) Nonlinear error dynamics for cycled data assimilation methods. Inverse Problems, 29 (2). 025002. ISSN 0266-5611 doi: 10.1088/0266-5611/29/2/025002

Thornhill, G. D., Mason, D. C., Dance, S. L., Lawless, A. S., Nichols, N. K. and Forbes, H. R. (2012) Integration of a 3D Variational data assimilation scheme with a coastal area morphodynamic model of Morecambe Bay. Coastal Engineering, 69. pp. 82-96. ISSN 0378-3839 doi: 10.1016/j.coastaleng.2012.05.010

Haben, S. A., Lawless, A. S. and Nichols, N. K. (2011) Conditioning of incremental variational data assimilation, with application to the Met Office system. Tellus Series A: Dynamic Meteorology and Oceanography, 63 (4). pp. 782-792. ISSN 1600-0870 doi: 10.1111/j.1600-0870.2011.00527.x

Haben, S. A., Lawless, A. S. and Nichols, N. K. (2011) Conditioning and preconditioning of the variational data assimilation problem. Computers & Fluids, 46 (1). pp. 252-256. ISSN 0045-7930 doi: 10.1016/j.compfluid.2010.11.025

Baxter, G.M., Dance, S.L., Lawless, A.S. and Nichols, N.K. (2011) Four-dimensional variational data assimilation for high resolution nested models. Computers & Fluids, 46 (1). pp. 137-141. ISSN 0045-7930 doi: 10.1016/j.compfluid.2011.01.023

Boess, C., Lawless, A. S., Nichols, N. K. and Bunse-Gerstner, A. (2011) State estimation using model order reduction for unstable systems. Computers & Fluids, 46 (1). pp. 155-160. ISSN 0045-7930 doi: 10.1016/j.compfluid.2010.11.033

Pocock, J. A., Dance, S. L. and Lawless, A. S. (2011) State estimation using the particle filter with mode tracking. Computers & Fluids, 46 (1). pp. 392-397. ISSN 0045-7930 doi: 10.1016/j.compfluid.2011.02.009

Katz, D., Lawless, A. S., Nichols, N. K., Cullen, M. J. P. and Bannister, R. N. (2011) Correlations of control variables in variational data assimilation. Quarterly Journal of the Royal Meteorological Society, 137 (656). pp. 620-630. ISSN 1477-870X doi: 10.1002/qj.798 (Part A)

Lawless, A. S. (2010) A note on the analysis error associated with 3D-FGAT. Quarterly Journal of the Royal Meteorological Society, 136 (649). pp. 1094-1098. ISSN 1477-870X doi: 10.1002/qj.619

Bannister, R. N., Katz, D., Cullen, M. J. P., Lawless, A. S. and Nichols, N. K. (2008) Modelling of forecast errors in geophysical fluid flows. International Journal for Numerical Methods in Fluids, 56 (8). pp. 1147-1153. ISSN 0271-2091 doi: 10.1002/fld.1618

Lawless, A.S., Nichols, N.K., Boess, C. and Bunse-Gerstner, A. (2008) Approximate Gauss-Newton Methods for optimal state estimation using reduced-order models. International Journal for Numerical Methods in Fluids, 56 (8). 1367 -1373. ISSN 0271-2091 doi: 10.1002/fld.1629

Lawless, A.S., Nichols, N.K., Boess, C. and Bunse-Gerstner, A. (2008) Using model reduction methods within incremental four-dimensional variational data assimilation. Monthly Weather Review, 136 (4). pp. 1511-1522. ISSN 0027-0644 doi: DOI: 10.1175/2007MWR2103.1

Watkinson, L.R., Lawless, A.S., Nichols, N.K. and Roulstone, I. (2007) Weak constraints in four-dimensional variational data assimilation. Meteorologische Zeitschrift, 16 (6). pp. 767-776. doi: 10.1127/0941-2948/2007/0249

Gratton, S., Lawless, A.S. and Nichols, N.K. (2007) Approximate Gauss-Newton methods for nonlinear least squares problems. SIAM Journal on Optimization (SIOPT), 18 (1). pp. 106-132. ISSN 1052-6234 doi: DOI:10.1137/050624935

Lawless, A. S. and Nichols, N. K. (2006) Inner loop stopping criteria for incremental four-dimensional variational data assimilation. Monthly Weather Review, 134. pp. 3425-3435.

Lawless, A. S., Gratton, S. and Nichols, N. K. (2005) Approximate iterative methods for variational data assimilation. International Journal For Numerical Methods In Fluids, 47 (10-11). pp. 1129-1135.

Watkinson, L. R., Lawless, A. S., Nichols, N. K. and Roulstone, I. (2005) Variational data assimilation for Hamiltonian problems. International Journal For Numerical Methods In Fluids, 47 (10-11). pp. 1361-1367.

Lawless, A. S., Gratton, S. and Nichols, N. K. (2005) An investigation of incremental 4D-Var using non-tangent linear models. Quarterly Journal of the Royal Meteorological Society, 131 (606). pp. 459-476. ISSN 1477-870X

Lawless, A.S., Nichols, N.K. and Ballard, S.P. (2003) A comparison of two methods for developing the linearization of a shallow-water model. Quarterly Journal of the Royal Meteorological Society, 129 (589). pp. 1237-1254. ISSN 1477-870X doi: 10.1256/qj.02.75

Book or Report Section

Lawless, A. (2013) Variational data assimilation for very large environmental problems. In: Cullen, M., Freitag, M.A., Kindermann, S. and Scheichl, R. (eds.) Large Scale Inverse Problems: Computational Methods and Applications in the Earth Sciences. Radon Series on Computational and Applied Mathematics , 2 (13). De Gruyter, Berlin, pp. 55-90. ISBN 9783110282269

Scott, T. R., Smith, P. J., Dance, S. L., Mason, D.C., Baines, M.J., Nichols, N.K., Horsburgh, K.J., Sweby, P.K. and Lawless, A.S. (2008) Data assimilation for morphodynamic prediction and predictability. In: Coastal Engineering 2008 Proceedings of the 31st International Conference. World Scientific, pp. 2386-2398. doi: 10.1142/9789814277426_0197

Lawless, A. S., Nichols, N. K., Boess, C. and Bunse-Gerstner, A. (2007) Approximate Gauss-Newton methods using reduced order models. In: Proceedings of the Ninth International ICFD Conference on Numerical Methods for Fluid Dynamics, March 26 – 29, 2007. ICFD, Reading.

Bannister, R. N., Katz, D., Cullen, M. J. P., Lawless, A. S. and Nichols, N. K. (2007) Modelling of forecast errors in geophysical fluid flows. In: Proceedings of the Ninth International ICFD Conference on Numerical Methods for Fluid Dynamics, March 26 – 29, 2007. ICFD, Reading.

Baxter, G. M., Dance, S. L., Lawless, A. S., Nichols, N. K. and Ballard, S. P. (2007) Towards Multi-scale Data Assimilation for High Resolution Nested Models. In: Proceedings of the Ninth International ICFD Conference on Numerical Methods for Fluid Dynamics, March 26 – 29, 2007. ICFD, Reading.

Lawless, A.S. and Nichols, N.K. (2003) The convergence of incremental 4D-Var using non-tangent linear models. In: Cote, J. (ed.) Research activities in atmospheric and oceanic modelling. WMO CAS/JSG Working Group on Numerical Experimentation, 01-17 + 01-18.

Conference or Workshop Item

Dance, S. L., Baines, M. J., Lawless, A. S., Mason, D. C., Nichols, N. K., Scott, T. R., Sweby, P. K., Smith, P. and Thornhill, G. D. (2010) Use of data assimilation methods in coastal sediment models. In: Flood Risk from Extreme Events (FREE) Final Science Meeting, 20 October, London. (Unpublished)

Nichols, N. K., Baxter, G., Dance, S. L. and Lawless, A. S. (2009) Issues in high resolution data assimilation. In: The 8th International Workshop on Adjoint Model Applications in Dynamic Meteorology, May 2009, Tannersville, PA, USA.

Thornhill, G. D., Scott, T. R., Smith , P.J., Dance, S. L., Mason, D. C., Nichols, N. K., Baines, M. J., Horsburgh, K.J., Sweby, P. K. and Lawless, A. S. (2009) Progress on “Changing coastlines: data assimilation for morphodynamic prediction and predictability”. In: Third NERC FREE Conference, 10-11 September, Plymouth. (Unpublished)

Scott, T. R., Smith, P. J., Dance, S.L., Mason, D.C., Nichols, N.K., Baines, M.J., Horsburgh, K., Sweby, P. K. and Lawless, A.S. (2007) Progress on Changing coastlines: data assimilation for morphodynamic prediction and predictability. In: 2nd NERC Conference on Flood Risk from Extreme Events (FREE). (Unpublished)

Lawless, A., Gratton, S. and Nichols, N. (2006) An investigation of the convergence of incremental 4D-Var. In: The Fourth WMO International Symposium on Assimilation of Observations in Meteorology and Oceanography, 2006.

Lawless, A.S., Gratton, S. and Nichols, N. K. (2004) Approximate iterative methods for variational data assimilation. In: Proceedings of the ICFD International Conference on Numerical Methods for Fluid Dynamics, Oxford, University of Oxford.

Stanton, L.R., Lawless, A.S., Nichols, N. K. and Roulstone, I. (2004) Variational data assimilation for Hamiltonian problems. In: Proceedings of the ICFD International Conference on Numerical Methods for Fluid Dynamics, Oxford, University of Oxford.

This list was generated on Thu Oct 30 09:02:50 2014 GMT.

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