Results 31 to 40 of about 24,876,673 (286)
Data assimilation: The Schrödinger perspective [PDF]
Acta Numerica, 2019 Data assimilation addresses the general problem of how to combine model-based predictions with partial and noisy observations of the process in an optimal manner. This survey focuses on sequential data assimilation techniques using probabilistic particle-based algorithms.
openaire +4 more sources
A posteriori error covariances in variational data assimilation [PDF]
, 2009 The problem of variational data assimilation for a nonlinear evolution model is formulated as an optimal control problem to find some unknown parameters of the model.
Le Dimet, F.X. +5 more
core +2 more sources
Journal of Marine Science and Engineering, 2020 A new parameterization for calculating the nonlinear near-bed wave orbital velocity in the shallow water was presented. The equations proposed by Isobe and Horikawa (1982) were modified in order to achieve more accurate predictions of the peak orbital ...
Pham Thanh Nam +3 more
doaj +1 more source
Frontiers in Climate, 2021 It is now widely recognized that in order to reach the target of limiting global warming to well below 2°C above pre-industrial levels (as the objective of the Paris agreement), cutting the carbon emissions even at an unprecedented pace will not be ...
Momme Butenschön +4 more
doaj +1 more source
On process-oriented conditional targeted covariance inflation (TCI) for 3D-volume radar data assimilation [PDF]
Nonlinear Processes in GeophysicsThis paper addresses a major challenge in assimilating 3D radar reflectivity data with a localized ensemble transform Kalman filter (LETKF).
K. Vobig +3 more
doaj +1 more source
The role of heat wave events in the occurrence and persistence of thermal stratification in the southern North Sea [PDF]
Natural Hazards and Earth System Sciences, 2022 Temperature extremes not only directly affect the marine environment and ecosystems but also indirectly influence hydrodynamics and marine life. In this study, the role of heat wave events in the occurrence and persistence of thermal stratification was ...
W. Chen +4 more
doaj +1 more source
Robustness of nuclear core activity reconstruction by data assimilation [PDF]
, 2010 We apply a data assimilation technique, inspired from meteorological applications, to perform an optimal reconstruction of the neutronic activity field in a nuclear core. Both measurements and information coming from a numerical model are used.
Bouriquet, Bertrand +13 more
core +1 more source
Remote Sensing, 2022 Convective activities play an important role in tropical weather systems. To investigate the characteristic scales of convection, a method combining a principal component (PC) analysis with Fourier decomposition is applied to brightness temperature ...
Jingchen Pu, Xiaolei Zou
doaj +1 more source
Benefits and limitations of data assimilation for discharge forecasting using an event-based rainfall–runoff model [PDF]
, 2013 Mediterranean catchments in southern France are threatened by potentially devastating fast floods which are difficult to anticipate. In order to improve the skill of rainfall-runoff models in predicting such flash floods, hydrologists use data ...
C. Bouvier +10 more
core +2 more sources
JEDI-MPAS Data Assimilation System v2.0.0-beta
, 2022 JEDI-MPAS is a multi-component software package that provides everything that is needed to run data assimilation applications for the atmospheric core of the Model for Prediction Across Scales (MPAS).
National Center for Atmospheric Research +1 more
core +1 more source