| Approximate Gauss–Newton methods for nonlinear least squares problems S Gratton, AS Lawless, NK Nichols SIAM Journal on Optimization 18 (1), 106-132, 2007 | 227 | 2007 |
| An investigation of incremental 4D‐Var using non‐tangent linear models AS Lawless, S Gratton, NK Nichols Quarterly Journal of the Royal Meteorological Society: A journal of the …, 2005 | 86 | 2005 |
| Representativity error for temperature and humidity using the Met Office high‐resolution model JA Waller, SL Dance, AS Lawless, NK Nichols, JR Eyre Quarterly Journal of the Royal Meteorological Society 140 (681), 1189-1197, 2014 | 63 | 2014 |
| Conditioning of incremental variational data assimilation, with application to the Met Office system SA Haben, AS Lawless, NK Nichols Tellus A: Dynamic Meteorology and Oceanography 63 (4), 782-792, 2011 | 55 | 2011 |
| Exploring strategies for coupled 4D-Var data assimilation using an idealised atmosphere–ocean model PJ Smith, AM Fowler, AS Lawless Tellus A: Dynamic Meteorology and Oceanography 67 (1), 27025, 2015 | 51 | 2015 |
| Data assimilation for state and parameter estimation: application to morphodynamic modelling PJ Smith, GD Thornhill, SL Dance, AS Lawless, DC Mason, NK Nichols Quarterly Journal of the Royal Meteorological Society 139 (671), 314-327, 2013 | 51 | 2013 |
| Approximate iterative methods for variational data assimilation AS Lawless, S Gratton, NK Nichols International journal for numerical methods in fluids 47 (10‐11), 1129-1135, 2005 | 50 | 2005 |
| Conditioning and preconditioning of the variational data assimilation problem SA Haben, AS Lawless, NK Nichols Computers & Fluids 46 (1), 252-256, 2011 | 46 | 2011 |
| A comparison of two methods for developing the linearization of a shallow‐water model AS Lawless, NK Nichols, SP Ballard Quarterly Journal of the Royal Meteorological Society: A journal of the …, 2003 | 45 | 2003 |
| Using model reduction methods within incremental four-dimensional variational data assimilation AS Lawless, NK Nichols, C Boess, A Bunse-Gerstner Monthly Weather Review 136 (4), 1511-1522, 2008 | 37 | 2008 |
| Estimating correlated observation error statistics using an ensemble transform Kalman filter JA Waller, SL Dance, AS Lawless, NK Nichols Tellus A: Dynamic Meteorology and Oceanography 66 (1), 23294, 2014 | 34 | 2014 |
| Investigating the role of prior and observation error correlations in improving a model forecast of forest carbon balance using Four-dimensional Variational data assimilation EM Pinnington, E Casella, SL Dance, AS Lawless, JIL Morison, ... Agricultural and forest meteorology 228, 299-314, 2016 | 27 | 2016 |
| Variational data assimilation for very large environmental problems AS Lawless Large scale inverse problems, 55-90, 2013 | 26 | 2013 |
| Inner-loop stopping criteria for incremental four-dimensional variational data assimilation AS Lawless, NK Nichols Monthly weather review 134 (11), 3425-3435, 2006 | 26 | 2006 |
| Estimating forecast error covariances for strongly coupled atmosphere–ocean 4D-Var data assimilation PJ Smith, AS Lawless, NK Nichols Monthly Weather Review 145 (10), 4011-4035, 2017 | 23 | 2017 |
| Accounting for model error in strong‐constraint 4D‐Var data assimilation KE Howes, AM Fowler, AS Lawless Quarterly Journal of the Royal Meteorological Society 143 (704), 1227-1240, 2017 | 21 | 2017 |
| Integration of a 3D variational data assimilation scheme with a coastal area morphodynamic model of Morecambe Bay GD Thornhill, DC Mason, SL Dance, AS Lawless, NK Nichols, HR Forbes Coastal Engineering 69, 82-96, 2012 | 21 | 2012 |
| A note on the analysis error associated with 3D‐FGAT AS Lawless Quarterly Journal of the Royal Meteorological Society 136 (649), 1094-1098, 2010 | 21 | 2010 |
| The conditioning of least‐squares problems in variational data assimilation JM Tabeart, SL Dance, SA Haben, AS Lawless, NK Nichols, JA Waller Numerical Linear Algebra with Applications 25 (5), e2165, 2018 | 20 | 2018 |
| An idealized study of coupled atmosphere–ocean 4D-Var in the presence of model error AM Fowler, AS Lawless Monthly Weather Review 144 (10), 4007-4030, 2016 | 20 | 2016 |
Nancy K NicholsProfessor of Applied Mathematics, University of ReadingDirección de correo verificada de reading.ac.uk
