Peter Jan van Leeuwen
Professor of Data Assimilation
RESPONSIBILITIES
- Professor of Data Assimilation
- Director of the Data-Assimilation Division of the National Centre for Earth Observation (NCEO)
- Head of the Data Assimilation Research Centre (DARC)
- Chair of the Royal Meteorological Society working group on Data Assimilation
RESEARCH INTERESTS
- Advanced data assimilation in non-linear models (e.g. particle filters)
- Information transfer in complex systems
- Agulhas system
- Geophysical fluid dynamics
- Data analysis
- Perturbation methods
- Low-frequency (period a few minutes) wave generation by breaking wind waves
RESEARCH PROJECTS
My research group consists of 18 scientists, distributed over two main research projects:
- Data assimilation in high-dimensional highly nonlinear systems (e.g. particle filters)
- CUNDA: Causality Relations using Nonlinear Data Assimilation (ERC Advanced Investigator Grant)
- Link to my research pages
WEB PAGES
Research group: Data Assimilation
POSTDOCTORAL & GRADUATE STUDENT SUPERVISION
PUBLICATIONS
Centaur Publications
2021
Ren, H., Amezcua, J. and Van Leeuwen, P. J. (2021) Effects of misspecified time-correlated model error in the (ensemble) Kalman Smoother. Quarterly Journal of the Royal Meteorological Society, 147 (734). pp. 573-588. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3934
Chiu, J. C. ORCID: https://orcid.org/0000-0002-8951-6913, Yang, C. K.
ORCID: https://orcid.org/0000-0001-7685-4481, Van Leeuwen, P. J.
ORCID: https://orcid.org/0000-0003-2325-5340, Feingold, G.
ORCID: https://orcid.org/0000-0002-0774-2926, Wood, R.
ORCID: https://orcid.org/0000-0002-1401-3828, Blanchard, Y.
ORCID: https://orcid.org/0000-0003-0515-3041, Mei, F.
ORCID: https://orcid.org/0000-0003-4285-2749 and Wang, J.
(2021)
Observational constraints on warm cloud microphysical processes using machine learning and optimization techniques.
Geophysical Research Letters, 48 (2).
e2020GL091236.
ISSN 0094-8276
doi: https://doi.org/10.1029/2020GL091236
2020
van Leeuwen, P. J. (2020) A consistent interpretation of the stochastic version of the Ensemble Kalman Filter. Quarterly Journal of the Royal Meteorological Society, 146 (731). pp. 2815-2825. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3819
Dauzickaite, I., Lawless, A. S., Scott, J. A. and Van Leeuwen, P. J. (2020) Spectral estimates for saddle point matrices arising in weak constraint four-dimensional variational data assimilation. Numerical Linear Algebra with Applications, 27 (5). ISSN 1099-1506 doi: https://doi.org/10.1002/nla.2313
Holm, H. H., Sætra, M. L. and Van Leeuwen, P. J. (2020) Massively parallel implicit equal-weights particle filter for ocean drift trajectory forecasting. Journal of Computational Physics: X, 6. 100053. ISSN 2590-0552 doi: https://doi.org/10.1016/j.jcpx.2020.100053
Tao, D., Bell, M., Rotunno, R. and Van Leeuwen, P. J. (2020) Why do the maximum intensities in modeled tropical cyclones vary under the same environmental conditions? Geophysical Research Letters, 47 (3). e2019GL085980. ISSN 0094-8276 doi: https://doi.org/10.1029/2019GL085980
2019
Van Leeuwen, P. J. (2019) Nonlocal observations and information transfer in data assimilation. Frontiers in Applied Mathematics and Statistics, 5. ISSN 2297-4687 doi: https://doi.org/10.3389/fams.2019.00048
Pinheiro, F. R., Van Leeuwen, P. J. and Geppert, G. (2019) Efficient nonlinear data assimilation using synchronisation in a particle filter. Quarterly Journal of the Royal Meteorological Society, 145 (723). pp. 2510-2523. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3576
Van Leeuwen, P. J., Künsch, H. R., Nerger, L., Potthast, R. and Reich, S. (2019) Particle filters for high‐dimensional geoscience applications: a review. Quarterly Journal of the Royal Meteorological Society, 145 (723). pp. 2335-2365. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3551
Pulido, M., Van Leeuwen, P. J. and Posselt, D. J. (2019) Kernel embedded nonlinear observational mappings in the variational mapping particle filter. In: ICCS 2019, 12-14 Jun 2019, Faro, Portugal, pp. 141-155. doi: https://doi.org/10.1007/978-3-030-22747-0_11
Gommenginger, C., Chapron, B., Hogg, A., Buckingham, C., Fox-Kemper, B., Eriksson, L., Soulat, F., Ubelmann, C., Ocampo-Torres, F., Nardelli, B. B., Griffin, D., Lopez-Dekker, P., Knudsen, P., Andersen, O., Stenseng, L., Stapleton, N., Perrie, W., Violante-Carvalho, N., Schulz-Stellenfleth, J., Woolf, D., Isern-Fontanet, J., Ardhuin, F., Klein, P., Mouche, A., Pascual, A., Capet, X., Hauser, D., Stoffelen, A., Morrow, R., Aouf, L., Breivik, Ø., Fu, L.-L., Johannessen, J. A., Aksenov, Y., Bricheno, L., Hirschi, J., Martin, A. C. H., Martin, A. P., Nurser, G., Polton, J., Wolf, J., Johnsen, H., Soloviev, A., Jacobs, G. A., Collard, F., Groom, S., Kudryavtsev, V., Wilkin, J., Navarro, V., Babanin, A., Martin, M., Siddorn, J., Saulter, A., Rippeth, T., Emery, B., Maximenko, N., Romeiser, R., Graber, H., Azcarate, A. A., Hughes, C. W., Vandemark, D., Silva, J. d., Van Leeuwen, P. J., Naveira-Garabato, A., Gemmrich, J., Mahadevan, A., Marquez, J., Munro, Y., Doody, S. and Burbidge, G. (2019) SEASTAR: a mission to study ocean submesoscale dynamics and small-scale atmosphere-ocean processes in coastal, shelf and polar seas. Frontiers in Marine Science, 6. 457. ISSN 2296-7745 doi: https://doi.org/10.3389/fmars.2019.00457
Skauvold, J., Eidsvik, J., Van Leeuwen, P. J. and Amezcua, J. (2019) A revised implicit equal-weights particle filter. Quarterly Journal of the Royal Meteorological Society, 145 (721). ISSN 1477-870X doi: https://doi.org/10.1002/qj.3506
2018
Amezcua, J. and Van Leeuwen, P. J. (2018) Time-correlated model error in the (ensemble) Kalman smoother. Quarterly Journal of the Royal Meteorological Society, 144 (717). pp. 2650-2665. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3378
Zhu, M., Van Leeuwen, P. J. and Zhang, W. (2018) Estimating model error covariances using particle filters. Quarterly Journal of the Royal Meteorological Society, 144 (713). pp. 1310-1320. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3132
Pinheiro, F. R., Van Leeuwen, P. J. and Parlitz, U. (2018) An ensemble framework for time delay synchronisation. Quarterly Journal of the Royal Meteorological Society, 144 (711(partB)). pp. 305-316. ISSN 1477-870X doi: https://doi.org/10.1002/qj.3204
Vetra-Carvalho, S., Van Leeuwen, P. J., Nerger, L., Bart, A., Altaf, M. U., Brasseur, P., Kirchgessner, P. and Beckers, J.-M. (2018) State-of-the-art stochastic data assimilation methods for high-dimensional non-Gaussian problems. Tellus A: Dynamic Meteorology and Oceanography, 70 (1). 1445364. ISSN 1600-0870 doi: https://doi.org/10.1080/16000870.2018.1445364
2017
Lang, M., Browne, P., Van Leeuwen, P. J. and Owens, M. (2017) Data assimilation in the solar wind: challenges and first results. Space Weather, 15 (11). pp. 1490-1510. ISSN 1542-7390 doi: https://doi.org/10.1002/2017SW001681
Goodliff, M., Amezcua, J. and Van Leeuwen, P. J. (2017) A weak-constraint 4DEnsembleVar. Part II: experiments with larger models. Tellus A, 69 (1). 1271565. ISSN 1600-0870 doi: https://doi.org/10.1080/16000870.2016.1271565
Van Leeuwen, P. J. (2017) Particle Filters for nonlinear data assimilation in high-dimensional systems. Annales de la faculté des sciences de Toulouse Mathématiques, 26 (4). pp. 1051-1085. ISSN 0240-2963 doi: https://doi.org/10.5802/afst.1560
Amezcua, J., Goodliff, M. and Van Leeuwen, P. J. (2017) A weak-constraint 4DEnsembleVar. Part I: formulation and simple model experiments. Tellus A, 69 (1). 1271564. ISSN 1600-0870 doi: https://doi.org/10.1080/16000870.2016.1271564
2016
Zhu, M., Van Leeuwen, P. J. and Amezcua, J. (2016) Implicit equal-weights particle filter. Quarterly Journal of the Royal Meteorological Society. ISSN 0035-9009 doi: https://doi.org/10.1002/qj.2784
Lang, M., Van Leeuwen, P. J. and Browne, P. (2016) A systematic method of parameterisation estimation using data assimilation. Tellus A, 68. 29012. ISSN 1600-0870
2015
Van Leeuwen, P. J. (2015) Representation errors and retrievals in linear and nonlinear data assimilation. Quarterly Journal of the Royal Meteorological Society, 141 (690). pp. 1612-1623. ISSN 1477-870X doi: https://doi.org/10.1002/qj.2464 (Part A)
Vaughan, G., Methven, J., Anderson, D., Antonescu, B., Baker, L., Baker, T. P., Ballard, S. P., Bower, K. N., Brown, P. R. A., Chagnon, J., Choularton, T. W., Chylik, J., Connolly, P. J., Cook, P. A., Cotton, R. J., Crosier, J., Dearden, C., Dorsey, J. R., Frame, T. H. A., Gallagher, M. W., Goodliff, M., Gray, S. L., Harvey, B. J., Knippertz, P., Lean, H. W., Li, D., Lloyd, G., Martinez-Alvarado, O., Nicol, J., Norris, J., Öström, E., Owen, J., Parker, D. J., Plant, R. S., Renfrew, I. A., Roberts, N. M., Rosenberg, P., Rudd, A. C., Schultz, D. M., Taylor, J. P., Trzeciak, T., Tubbs, R., Vance, A. K., Van Leeuwen, P. J., Wellpott, A. and Woolley, A. (2015) Cloud banding and winds in intense European cyclones: results from the DIAMET project. Bulletin of the American Meteorological Society, 96 (2). pp. 249-265. ISSN 1520-0477 doi: https://doi.org/10.1175/BAMS-D-13-00238.1
Van Leeuwen, P. (2015) Aspects of particle filtering in high-dimensional spaces. In: Ravela, S. and Sandu, A. (eds.) Dynamic data-driven environmental systems science. Lecture notes in computer science, 8964. Springer, Heidelberg, pp. 251-262. ISBN 9783319251370 doi: https://doi.org/10.1007/978-3-319-25138-7
Goodliff, M., Amezcua, J. and Van Leeuwen, P. (2015) Comparing hybrid data assimilation methods on the Lorenz 1963 model with increasing nonlinearity. Tellus A, 67. ISSN 1600-0870 doi: https://doi.org/10.3402/tellusa.v67.26928
Buehner, M., Gelaro, R., Alves, O., Dee, D., Kalnay, E., Van Leeuwen, P. J., Lorenc, A., Miyoshi, T., Saunders, R. and Schiller, A. (2015) Data assimilation methods and applications. In: Brunet, G., Jones, S. and Ruti, P.M. (eds.) Seamless prediction of the earth system: from minutes to months. World Meteorological Organization. ISBN 9789263111562
Van Leeuwen, P. J., Cheng, Y. and Reich, S. (2015) Nonlinear data assimilation. Frontiers in Applied Dynamical Systems: Reviews and Tutorials, 2. Springer. ISBN 9783319183466
Browne, P. A. and Van Leeuwen, P. J. (2015) Twin experiments with the equivalent weights particle filter and HadCM3. Quarterly Journal of the Royal Meteorological Society. ISSN 1477-870X doi: https://doi.org/10.1002/qj.2621
Ades, M. and Van Leeuwen, P. (2015) The effect of the equivalent-weights particle filter on dynamical balance in a primitive equation model. Monthly Weather Review, 143 (2). pp. 581-596. ISSN 0027-0644 doi: https://doi.org/10.1175/MWR-D-14-00050.1
2014
Van Leeuwen, P. (2014) Particle filters for the geosciences. In: Advanced data assimilation for Geosciences : lecture notes of the Les Houches School of Physics: special issue, June 2012. Oxford University Press, Oxford, pp. 291-318. ISBN 9780198723844
Amezcua, J. and Van Leeuwen, P. (2014) Gaussian anamorphosis in the analysis step of the EnKF: a joint state-variable/observation approach. Tellus A, 66. 23493. ISSN 1600-0870 doi: https://doi.org/10.3402/tellusa.v66.23493
Ades, M. and Van Leeuwen, P. J. (2014) The equivalent-weights particle filter in a high-dimensional system. Quarterly Journal of the Royal Meteorological Society, 141 (687). pp. 484-503. ISSN 1477-870X doi: https://doi.org/10.1002/qj.2370
2013
Van Leeuwen, P. J. and Ades, M. (2013) Efficient fully nonlinear data assimilation for geophysical fluid dynamics. Computers & Geosciences, 55. pp. 16-27. ISSN 0098-3004 doi: https://doi.org/10.1016/j.cageo.2012.04.015
Fowler, A. and Van Leeuwen, P. J. (2013) Observation impact in data assimilation: the effect of non-Gaussian observation error. Tellus A, 65. 20035. ISSN 1600-0870 doi: https://doi.org/10.3402/tellusa.v65i0.20035
Ades, M. and Van Leeuwen, P. J. (2013) An exploration of the equivalent weights particle filter. Quarterly Journal of the Royal Meteorological Society, 139 (672 part A). pp. 820-840. ISSN 1477-870X doi: https://doi.org/10.1002/qj.1995
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: https://doi.org/10.1088/0266-5611/29/2/025002
Bianchi, B., Van Leeuwen, P., Hogan, R. and Berne, A. (2013) A variational approach to retrieve rain rate by combining information from rain gauges, radars, and microwave links. Journal of Hydrometeorology, 14 (6). pp. 1897-1909. ISSN 1525-7541 doi: https://doi.org/10.1175/JHM-D-12-094.1
2012
Kramer, W., Dijkstra, H. A., Pierini, S. and van Leeuwen, P. J. (2012) Measuring the impact of observations on the predictability of the Kuroshio Extension in a shallow-water model. Journal of Physical Oceanography, 42 (1). pp. 3-17. ISSN 0022-3670 doi: https://doi.org/10.1175/JPO-D-11-014.1
Fowler, A. and Van Leeuwen, P. (2012) Measures of observation impact in non-Gaussian data assimilation. Tellus A, 64. 17192. ISSN 1600-0870 doi: https://doi.org/10.3402/tellusa.v64i0.17192
Van Leeuwen, P. and De Ruijter, W. P. M. (2012) Reply to comments on ‘On the steadiness of separating meandering currents’. Journal of Physical Oceanography, 42 (8). pp. 1371-1374. ISSN 0022-3670 doi: https://doi.org/10.1175/JPO-D-11-0213.1
2011
van Leeuwen, P. (2011) Efficient non-linear data assimilation in geophysical fluid dynamics. Computers & Fluids, 46 (1). pp. 52-58. ISSN 0045-7930 doi: https://doi.org/10.1016/j.compfluid.2010.11.011
2010
Ridderinkhof, H., van der Werf, P. M., Ullgren, J. E., van Aken, H. M., Van Leeuwen, P. J. and de Ruijter, W. P. M. (2010) Seasonal and interannual variability in the Mozambique Channel from moored current observations. Journal of Geophysical Research, 115 (C6). C06010. ISSN 0148-0227 doi: https://doi.org/10.1029/2009JC005619
van der Werf, P. M., Van Leeuwen, P. J., Ridderinkhof, H. and de Ruijter, W. P. M. (2010) Comparison between observations and models of the Mozambique Channel transport: Seasonal cycle and eddy frequencies. Journal of Geophysical Research, 115 (C2). C02002. ISSN 0148-0227 doi: https://doi.org/10.1029/2009JC005633
van Sebille, E., Van Leeuwen, P. J., Biastoch, A. and de Ruijter, W. P.M. (2010) Flux comparison of Eulerian and Lagrangian estimates of Agulhas leakage: A case study using a numerical model. Deep Sea Research Part I: Oceanographic Research Papers, 57 (3). pp. 319-327. ISSN 0967-0637 doi: https://doi.org/10.1016/j.dsr.2009.12.006
van Leeuwen, P. J. (2010) Nonlinear data assimilation in geosciences: an extremely efficient particle filter. Quarterly Journal of the Royal Meteorological Society, 136 Part B (653). pp. 1991-1999. ISSN 1477-870X doi: https://doi.org/10.1002/qj.699
van Sebille, E., Van Leeuwen, P. J., Biastoch, A. and de Ruijter, W. P. M. (2010) On the fast decay of Agulhas rings. Journal of Geophysical Research, 115 (C3). C03010. ISSN 0148-0227 doi: https://doi.org/10.1029/2009JC005585
2009
Van Leeuwen, P. J. (2009) Particle filtering in geophysical systems. Monthly Weather Review, 137 (12). pp. 4089-4114. ISSN 0027-0644 doi: https://doi.org/10.1175/2009MWR2835.1
van der Werf, P. M., Schouten, M. W., Van Leeuwen, P. J., Ridderinkhof, H. and de Ruijter, W. P. M. (2009) Observation and origin of an interannual salinity anomaly in the Mozambique Channel. Journal of Geophysical Research, 114 (C3). C03017. ISSN 0148-0227 doi: https://doi.org/10.1029/2008JC004911
van Sebille, E., Biastoch, A., Van Leeuwen, P. J. and de Ruijter, W. P. M. (2009) A weaker Agulhas Current leads to more Agulhas leakage. Geophysical Research Letters, 36 (3). L03601. ISSN 0094-8276 doi: https://doi.org/10.1029/2008GL036614
van Sebille, E., Van Leeuwen, P. J., Biastoch, A., Barron, C.N. and de Ruijter, W.P.M. (2009) Lagrangian validation of numerical drifter trajectories using drifting buoys: Application to the Agulhas system. Ocean Modelling, 29 (4). pp. 269-276. ISSN 1463-5003 doi: https://doi.org/10.1016/j.ocemod.2009.05.005
Van Leeuwen, P. J. and de Ruijter, W. P. M. (2009) On the steadiness of separating meandering currents. Journal of Physical Oceanography, 39 (2). pp. 437-448. ISSN 0022-3670 doi: https://doi.org/10.1175/2008JPO3869.1
Van Sebille, E., Barron, C.N., biastoch, A., Van Leeuwen, P. J., Vossepoel, F.C. and De Ruijter, W.P.M. (2009) Relating Agulhas leakage to the Agulhas Current retroflection location. Ocean Science, 5 (4). pp. 511-521. ISSN 1812-0784 doi: https://doi.org/10.5194/os-5-511-2009
De Steur, L. and Van Leeuwen, P. J. (2009) The influence of bottom topography on the decay of modeled Agulhas rings. Deep Sea Research Part I: Oceanographic Research Papers , 56 (4). 471-494 . ISSN 0967-0637 doi: https://doi.org/10.1016/j.dsr.2008.11.009
2008
Sterl, A., Severijns, C., Dijkstra, H., Hazeleger, W., Jan van Oldenborgh, G., van den Broeke, M., Burgers, G., van den Hurk, B., Van Leeuwen, P. J. and van Velthoven, P. (2008) When can we expect extremely high surface temperatures? Geophysical Research Letters, 35 (14). L14703. ISSN 0094-8276 doi: https://doi.org/10.1029/2008GL034071
2007
van Sebille, E. and van Leeuwen, P. J. (2007) Fast northward energy transfer in the Atlantic due to Agulhas rings. Journal of Physical Oceanography, 37 (9). pp. 2305-2315. ISSN 0022-3670 doi: https://doi.org/10.1175/JPO3108.1
Van Leeuwen, P. J. (2007) The propagation mechanism of a vortex on the β plane. Journal of Physical Oceanography, 37 (9). pp. 2316-2330. ISSN 0022-3670 doi: https://doi.org/10.1175/JPO3107.1
Palastanga, V., Van Leeuwen, P. J., Schouten, M. W. and de Ruijter, W. P. M. (2007) Flow structure and variability in the subtropical Indian Ocean: Instability of the South Indian Ocean Countercurrent. Journal of Geophysical Research, 112 (C1). C01001. ISSN 0148-0227 doi: https://doi.org/10.1029/2005JC003395
Vossepoel, F. C. and Van Leeuwen, P. J. (2007) Parameter estimation using a particle method: inferring mixing coefficients from sea level observations. Monthly Weather Review, 135 (3). pp. 1006-1020. ISSN 0027-0644 doi: https://doi.org/10.1175/MWR3328.1
2006
de Ruijter, W. P. M., Brummer, G. -J. A., Drijfhout, S. S., Lutjeharms, J. R. E., Peeters, F., Ridderinkhof, H., van Aken, H. and Van Leeuwen, P. J. (2006) Observations of the inter-ocean exchange around South Africa. EOS transactions, 87 (9). p. 97. ISSN 0096-3941 doi: https://doi.org/10.1029/2006EO090002
Palastanga, V., Van Leeuwen, P. J. and de Ruijter, W. P. M. (2006) A link between low-frequency mesoscale eddy variability around Madagascar and the large-scale Indian Ocean variability. Journal of Geophysical Research, 111 (C9). C09029. ISSN 0148-0227 doi: https://doi.org/10.1029/2005JC003081
2005
Brasseur, P., Bahurel, P., Bertino, L., Birol, F., Brankart, J.-M., Ferry, N., Losa, S., Remy, E., Schröter, J., Skachko, S., Testut, C.-E., Tranchant, B., Van Leeuwen, P. J. and Verron, J. (2005) Data assimilation for marine monitoring and prediction: The MERCATOR operational assimilation systems and the MERSEA developments. Quarterly Journal of the Royal Meteorological Society, 131 (613). pp. 3561-3582. ISSN 1477-870X doi: https://doi.org/10.1256/qj.05.142
2004
de Steur, L., Van Leeuwen, P. J. and Drijfhout, S. S. (2004) Tracer Leakage from Modeled Agulhas Rings. Journal of Physical Oceanography, 34 (6). pp. 1387-1399. ISSN 0022-3670 doi: https://doi.org/10.1175/1520-0485(2004)034<1387:TLFMAR>2.0.CO;2
2003
Schouten, M. W., de Ruijter, W. P.M., Van Leeuwen, P. J. and Ridderinkhof, H. (2003) Eddies and variability in the Mozambique Channel. Deep Sea Research Part II: Topical Studies in Oceanography, 50 (12-13). pp. 1987-2003. ISSN 09670645 doi: https://doi.org/10.1016/S0967-0645(03)00042-0
van Hees, F., van der Steen, A. J. and Van Leeuwen, P. J. (2003) A parallel data assimilation model for oceanographic observations. Concurrency and Computation: Practice and Experience, 15 (13). pp. 1191-1204. ISSN 1532-0626 doi: https://doi.org/10.1002/cpe.726
Van Leeuwen, P. J. (2003) A variance-minimizing filter for large-scale applications. Monthly Weather Review, 131 (9). pp. 2071-2084. ISSN 0027-0644 doi: https://doi.org/10.1175/1520-0493(2003)131<2071:AVFFLA>2.0.CO;2
2002
Burgers, G., Balmaseda, M. A., Vossepoel, F. C., van Oldenborgh, G. J. and Van Leeuwen, P. J. (2002) Balanced Ocean-Data Assimilation near the Equator. Journal of Physical Oceanography, 32 (9). pp. 2509-2519. ISSN 0022-3670 doi: https://doi.org/10.1175/1520-0485-32.9.2509
Schouten, M. W., De Ruijter, W. P. M. and Van Leeuwen, P. J. (2002) Upstream control of Agulhas Ring shedding. Journal of Geophysical Research, 107 (C8). ISSN 0148-0227 doi: https://doi.org/10.1029/2001JC000804
2001
Van Leeuwen, P. J. (2001) An ensemble smoother with error estimates. Monthly Weather Review, 129 (4). pp. 709-728. ISSN 0027-0644 doi: https://doi.org/10.1175/1520-0493(2001)129<0709:AESWEE>2.0.CO;2
2000
Evensen, G. and Van Leeuwen, P. J. (2000) An Ensemble Kalman Smoother for Nonlinear Dynamics. Monthly Weather Review, 128 (6). pp. 1852-1867. ISSN 0027-0644 doi: https://doi.org/10.1175/1520-0493(2000)128<1852:AEKSFN>2.0.CO;2
Schonten, M. W., de Ruijter, W. P. M., Van Leeuwen, P. J. and Lutjeharms, J. R. E. (2000) Translation, decay and splitting of Agulhas rings in the southeastern Atlantic Ocean. Journal of Geophysical Research: Oceans, 105 (C9). pp. 21913-21925. ISSN 01480227 doi: https://doi.org/10.1029/1999JC000046
1999
Van Leeuwen, P. J. (1999) Comment on “Data Assimilation Using an Ensemble Kalman Filter Technique”. Monthly Weather Review, 127 (6). pp. 1374-1377. ISSN 0027-0644 doi: https://doi.org/10.1175/1520-0493(1999)127<1374:CODAUA>2.0.CO;2
de Ruijter, W. P. M., Van Leeuwen, P. J. and Lutjeharms, J. R. E. (1999) Generation and Evolution of Natal Pulses: Solitary Meanders in the Agulhas Current. Journal of Physical Oceanography, 29 (12). pp. 3043-3055. ISSN 0022-3670 doi: https://doi.org/10.1175/1520-0485(1999)029<3043:GAEONP>2.0.CO;2
Weijer, W., de Ruijter, W. P. M., Dijkstra, H. A. and Van Leeuwen, P. J. (1999) Impact of Interbasin Exchange on the Atlantic Overturning Circulation. Journal of Physical Oceanography, 29 (9). pp. 2266-2284. ISSN 0022-3670 doi: https://doi.org/10.1175/1520-0485(1999)029<2266:IOIEOT>2.0.CO;2
1998
Burgers, G., Van Leeuwen, P. J. and Evensen, G. (1998) Analysis Scheme in the Ensemble Kalman Filter. Monthly Weather Review, 126 (6). pp. 1719-1724. ISSN 0027-0644 doi: https://doi.org/10.1175/1520-0493(1998)126<1719:ASITEK>2.0.CO;2
1997
Van Leeuwen, P. J. (1997) A monitoring system for the Indian-Atlantic connection. Proceedings of the First International Conference on EuroGOOS, 62. pp. 596-602. ISSN 04229894 doi: https://doi.org/10.1016/S0422-9894(97)80071-2
1996
Evensen, G. and Van Leeuwen, P. J. (1996) Assimilation of Geosat Altimeter Data for the Agulhas Current Using the Ensemble Kalman Filter with a Quasigeostrophic Model. Monthly Weather Review, 124 (1). pp. 85-96. ISSN 0027-0644 doi: https://doi.org/10.1175/1520-0493(1996)124<0085:AOGADF>2.0.CO;2
Van Leeuwen, P. J. and Evensen, G. (1996) Data Assimilation and Inverse Methods in Terms of a Probabilistic Formulation. Monthly Weather Review, 124 (12). pp. 2898-2913. ISSN 0027-0644 doi: https://doi.org/10.1175/1520-0493(1996)124<2898:DAAIMI>2.0.CO;2
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