Editorial: Data Assimilation of Nonlocal Observations in Complex Systems by A. Hutt, M. Bocquet, A. Carrassi, A. Carrassi, L. Lei, R. Potthast

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Trends on major actinides from an integral data assimilation by Rimpault Gerald, Noguère Gilles, de Saint Jean Cyrille

“…The objective of this work is to revisit integral data assimilation for a better prediction of the characteristics of SFR cores. …”
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Impact of nuclear data evaluations on data assimilation for an LFR by Romojaro Pablo, Álvarez-Velarde Francisco

“…However, the impact of using different evaluations while performing data assimilation to constraint the uncertainties in the criticality parameters has not been properly assessed yet. …”
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Three-dimensional data assimilation for ionospheric reference scenarios by T. Gerzen, V. Wilken, D. Minkwitz, M. M. Hoque, S. Schlüter

“…A significant improvement is achieved by the data assimilation, with a decrease in the residual errors by up to 98 % compared to the initial guess of the background. …”
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Data Assimilation in Forest Inventory: First Empirical Results by Mattias Nyström, Nils Lindgren, Jörgen Wallerman, Anton Grafström, Anders Muszta, Kenneth Nyström, Jonas Bohlin, Erik Willén, Johan E. S. Fransson, Sarah Ehlers, Håkan Olsson, Göran Ståhl

Subjects: “…data assimilation…”
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Non-local Observations and Information Transfer in Data Assimilation by Peter Jan van Leeuwen, Peter Jan van Leeuwen

Subjects: “…data assimilation…”
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Variational data assimilation with the YAO platform for hydrological forecasting by A. Abbaris, H. Dakhlaoui, H. Dakhlaoui, S. Thiria, Z. Bargaoui

“…In this study data assimilation based on variational assimilation was implemented with the HBV hydrological model using the YAO platform of University Pierre and Marie Curie (France). …”
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Ultra Rapid Data Assimilation Based on Ensemble Filters by Roland Potthast, Roland Potthast, Christian A. Welzbacher

Subjects: “…data assimilation (DA)…”
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Statistical Data Assimilation: Formulation and Examples From Neurobiology by Anna Miller, Dawei Li, Jason Platt, Arij Daou, Daniel Margoliash, Henry D. I. Abarbanel, Henry D. I. Abarbanel

Subjects: “…data assimilation…”
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Bayesian sequential data assimilation for COVID-19 forecasting by Maria L. Daza-Torres, Marcos A. Capistrán, Antonio Capella, J. Andrés Christen

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Impact of Satellite and In Situ Data Assimilation on Hydrological Predictions by Jude Lubega Musuuza, David Gustafsson, Rafael Pimentel, Louise Crochemore, Ilias Pechlivanidis

Subjects: “…data assimilation…”
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Quantifying Precipitation Uncertainty for Land Data Assimilation Applications by Entekhabi, Dara, Alemohammad, Hamed, McLaughlin, Dennis

“…Ensemble-based data assimilation techniques are often applied to land surface models in order to estimate components of terrestrial water and energy balance. …”
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High order stochastic transport and Lagrangian data assimilation by Dutt, Arkopal

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Oil reservoir characterization using ensemble data assimilation by Jafarpour, Behnam

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WRF-Var implementation for data assimilation experimentation at MIT by Williams, John K. (John Kenneth)

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Variational data assimilation using targetted random walks by Cotter, S, Dashti, M, Robinson, J, Stuart, A

“…The variational approach to data assimilation is a widely used methodology for both online prediction and for reanalysis (offline hindcasting). …”

Investigating the semiannual oscillation on Mars using data assimilation by Ruan, T, Lewis, N, Lewis, S, Montabone, L, Read, P

“…A Martian semiannual oscillation (SAO), similar to that in the Earths tropical stratosphere, is evident in the Mars Analysis Correction Data Assimilation reanalysis dataset (MACDA) version 1.0, not only in the tropics, but also extending to higher latitudes. …”

The conditioning of least-squares problems in variational data assimilation by Tabeart, J, Dance, S, Haben, S, Lawless, A, Nichols, N, Waller, J

“…In variational data assimilation a least-squares objective function is minimised to obtain the most likely state of a dynamical system. …”

Data assimilation by conditioning of driving noise on future observations by Lee, W, Farmer, C

“…Alternatively, the order of the steps can be switched to i) one step ahead data assimilation followed by ii) uncertainty propagation. …”

Efficient ensemble data assimilation for coupled models with the Parallel Data Assimilation Framework: example of AWI-CM (AWI-CM-PDAF 1.0) by L. Nerger, Q. Tang, L. Mu

“…<p>Data assimilation integrates information from observational measurements with numerical models. …”
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