Articles | Volume 25, issue 1
https://doi.org/10.5194/npg-25-125-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/npg-25-125-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Feb 2018
Research article |
| 23 Feb 2018
| 23 Feb 2018
Preface: Current perspectives in modelling, monitoring, and predicting geophysical fluid dynamics
Ana M. Mancho
CORRESPONDING AUTHOR
Instituto de Ciencias Matemáticas, CSIC-UAM-UC3M-UCM, Serrano 121, 28006 Madrid, Spain
Emilio Hernández-García
Instituto de Física Interdisciplinar y Sistemas Complejos IFISC (CSIC-UIB), Campus Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain
Cristóbal López
Instituto de Física Interdisciplinar y Sistemas Complejos IFISC (CSIC-UIB), Campus Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain
Antonio Turiel
Institut de Ciències del Mar, CSIC, Passeig Marítim de la Barceloneta 37–49, 08003 Barcelona, Spain
Stephen Wiggins
School of Mathematics, University of Bristol, University Walk, Bristol, BS8 1TW, UK
Vicente Pérez-Muñuzuri
Group of Nonlinear Physics, Faculty of Physics, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Cited articles
Basnayake, R., Bollt, E., Tufillaro, N., Sun, J., and Gierach, M.: Regularization destriping of remote sensing imagery, Nonlin. Processes Geophys., 24, 367–378, https://doi.org/10.5194/npg-24-367-2017, 2017.
Bower, A. S.: A simple kinematic mechanism for mixing fluid parcels across a menadering jet, J. Phys. Oceanogr., 21, 173–180, 1991.
Curbelo, J., García-Garrido, V. J., Mechoso, C. R., Mancho, A. M., Wiggins, S., and Niang, C.: Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex, Nonlin. Processes Geophys., 24, 379–392, https://doi.org/10.5194/npg-24-379-2017, 2017.
Garaboa-Paz, D., Lorenzo, N., and Pérez-Muñuzuri, V.: Influence of finite-time Lyapunov exponents on winter precipitation over the Iberian Peninsula, Nonlin. Processes Geophys., 24, 227–235, https://doi.org/10.5194/npg-24-227-2017, 2017.
García-Garrido, V. J., Curbelo, J., Mechoso, C. R., Mancho, A. M., and Wiggins, S.: A simple kinematic model for the Lagrangian description of relevant nonlinear processes in the stratospheric polar vortex, Nonlin. Processes Geophys., 24, 265–278, https://doi.org/10.5194/npg-24-265-2017, 2017.
Isern-Fontanet, J., Ballabrera-Poy, J., Turiel, A., and García-Ladona, E.: Remote sensing of ocean surface currents: a review of what is being observed and what is being assimilated, Nonlin. Processes Geophys., 24, 613–643, https://doi.org/10.5194/npg-24-613-2017, 2017.
Koshel, K. V. and Ryzhov, E. A.: Parametric resonance in the dynamics of an elliptic vortex in a periodically strained environment, Nonlin. Processes Geophys., 24, 1–8, https://doi.org/10.5194/npg-24-1-2017, 2017.
Monroy, P., Hernández-García, E., Rossi, V., and López, C.: Modeling the dynamical sinking of biogenic particles in oceanic flow, Nonlin. Processes Geophys., 24, 293–305, https://doi.org/10.5194/npg-24-293-2017, 2017.
Padberg-Gehle, K. and Schneide, C.: Network-based study of Lagrangian transport and mixing, Nonlin. Processes Geophys., 24, 661–671, https://doi.org/10.5194/npg-24-661-2017, 2017.
Prants, S. V., Budyansky, M. V., and Uleysky, M. Yu.: Statistical analysis of Lagrangian transport of subtropical waters in the Japan Sea based on AVISO altimetry data, Nonlin. Processes Geophys., 24, 89–99, https://doi.org/10.5194/npg-24-89-2017, 2017.
Rypina, I. I. and Pratt, L. J.: Trajectory encounter volume as a diagnostic of mixing potential in fluid flows, Nonlin. Processes Geophys., 24, 189–202, https://doi.org/10.5194/npg-24-189-2017, 2017.
Samelson, R. M.: Fluid exchange across a meandering jet, J. Phys. Oceanogr., 22, 431–440, 1992.
Samelson, R. M. and Wiggins, S.: Lagrangian Transport in Geophysical Jets and Waves: The Dynamical Systems Approach, Springer-Verlag, New York, 2006.
Yu, X., Zhang, S., Lin, X., and Li, M.: Insights on the role of accurate state estimation in coupled model parameter estimation by a conceptual climate model study, Nonlin. Processes Geophys., 24, 125–139, https://doi.org/10.5194/npg-24-125-2017, 2017.
