Results 41 to 50 of about 21,726,964 (386)

Data Assimilation in Reduced Modeling [PDF]

SIAM/ASA Journal on Uncertainty Quantification, 2017
We consider the problem of optimal recovery of an element $u$ of a Hilbert space $\mathcal{H}$ from $m$ measurements obtained through known linear functionals on $\mathcal{H}$. Problems of this type are well studied \cite{MRW} under an assumption that $u$ belongs to a prescribed model class, e.g. a known compact subset of $\mathcal{H}$.
Binev, Peter, Cohen, Albert, Dahmen, Wolfgang, Devore, Ronald, Petrova, Guergana, Wojtaszczyk, Przemyslaw   +5 more
openaire   +4 more sources

Sequential Data Assimilation of the Stochastic SEIR Epidemic Model for Regional COVID-19 Dynamics

Bulletin of Mathematical Biology, 2020
Newly emerging pandemics like COVID-19 call for predictive models to implement precisely tuned responses to limit their deep impact on society. Standard epidemic models provide a theoretically well-founded dynamical description of disease incidence.
Ralf Engbert, M. M. Rabe, Reinhold Kliegl, S. Reich   +3 more
semanticscholar   +1 more source

Data assimilation in price formation [PDF]

Inverse Problems, 2020
Abstract We consider the problem of estimating the density of buyers and vendors in a nonlinear parabolic price formation model using measurements of the price and the transaction rate. Our approach is based on a work by Puel (Puel J-P 2002 C. R. Acad.
Martin Burger, Jan-Frederik Pietschmann, Marie-Therese Wolfram   +2 more
openaire   +4 more sources

Improved Calculation of Nonlinear Near-Bed Wave Orbital Velocity in Shallow Water: Validation against Laboratory and Field Data

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, Joanna Staneva, Nguyen Thi Thao, Magnus Larson   +3 more
doaj   +1 more source

Alkalinization Scenarios in the Mediterranean Sea for Efficient Removal of Atmospheric CO2 and the Mitigation of Ocean Acidification

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, Tomas Lovato, Simona Masina, Stefano Caserini, Mario Grosso   +4 more
doaj   +1 more source

The ERA‐Interim reanalysis: configuration and performance of the data assimilation system

, 2011
ERA‐Interim is the latest global atmospheric reanalysis produced by the European Centre for Medium‐Range Weather Forecasts (ECMWF). The ERA‐Interim project was conducted in part to prepare for a new atmospheric reanalysis to replace ERA‐40, which will ...
D. Dee, S. Uppala, A. Simmons, P. Berrisford, P. Poli, S. Kobayashi, U. Andrae, M. Balmaseda, G. Balsamo, P. Bauer, P. Bechtold, A. Beljaars, L. V. D. Berg, J. Bidlot, N. Bormann, C. Delsol, R. Dragani, M. Fuentes, A. Geer, L. Haimberger, S. Healy, H. Hersbach, E. Holm, L. Isaksen, P. Kållberg, M. Köhler, M. Matricardi, A. Mcnally, B. Monge-Sanz, J. Morcrette, B. Park, C. Peubey, P. Rosnay, Christina Tavolato, J. Thepaut, F. Vitart   +35 more
semanticscholar   +1 more source

Toward Snow Cover Estimation in Mountainous Areas Using Modern Data Assimilation Methods: A Review

Frontiers in Earth Science, 2020
The snow cover is a key component of land surface hydrology, especially in mountain areas where it governs the amount and timing of water availability in downstream areas.
C. Largeron, M. Dumont, S. Morin, A. Boone, M. Lafaysse, Sammy Metref, E. Cosme, T. Jonas, A. Winstral, S. Margulis   +9 more
semanticscholar   +1 more source

Characteristic Scales of Tropical Convection Based on the Japanese Advanced Himawari-8 Imager Observations

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

Data assimilation in a multi-scale model [PDF]

, 2017
Data assimilation for multi-scale models is an important contemporary research topic. Especially the role of unresolved scales and model error in data assimilation needs to be systematically addressed.
Anderson, Anderson, Berner, Berry, Bonavita, Bonavita, Builtjes, Clayton, Courtier, Crommelin, Dalcher, Daley, Echevin, Ehrendorfer, Evensen, Fatkullin, Fisher, Franzke, Franzke, Gottwald, Grooms, Hamil, Haugen, Houtekamer, Hunt, Järvinen, Kalman, Kalman, Kalnay, Keppenne, Lorenc, Lorenz, Lorenz, Majda, Majda, Majda, Meng, Miller, Mitchell, Mitchell, Palmer, Pham, Rizzoli, Simmons, Toth, Var, Walker, Wang, Whitaker, Whitaker, Wilks   +50 more
core   +1 more source

Mitigation of Systematic Noise in F16 SSMIS LAS Channels Observations for Tropical Cyclone Applications

Remote Sensing, 2022
The Special Sensor Microwave Imager Sounder (SSMIS) onboard the Defense Meteorological Satellite Program (DMSP) F16, launched on 18 October 2003, was the first conical-scanning radiometer to combine the Special Sensor Microwave/Imagers (SSM/I), Special ...
Huijie Dong, Xiaolei Zou
doaj   +1 more source