International Symposium on Data Assimilation - Online
Overview
- Date: January 2021 - February 2022, October 2022 - June 2023, January 2024 - September 2024, January 2025 -
- Place: Online
- Language: English
Outline
The International Symposium on Data Assimilation - Online (ISDA-Online) is a seminar series on the topic of Data Assimilation.
The 8th ISDA that was planned at Colorado State University for the summer of 2020 had to be postponed until the year 2022 due to Corona.
In the meantime, the ISDA-Online seminar series provides a monthly platform for the exchange of new and exciting data assimilation research.
We, RIKEN Data Assimilation Research Team, publish recorded videos as a co-organizer.
Please see the details of the symposium at the main organizer's web site: ISDA-Onlie (University of Vienna).
Presentations in 2025
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Marc Bocquet, Alban Farchi, Tobias S. Finn, Charlotte Durand, Sibo Cheng, Yumeng Chen, Ivo Pasmans, Alberto Carrassi |
Are Ensemble-based Data Assimilation Methods Really Necessary for Accurate Filtering? |
Youtube |
| Robin Armstrong, Ian Grooms, Chris Snyder |
An Integral-Form Ensemble Square-Root Filter with Efficient and Precise Model-Space Localization |
Youtube |
| Jorge Gacitua, Juan Ruiz |
Exploration of Tempering Data Assimilation Methods for using the Local Ensemble Transform Kalman Filter: Simple and Intermediate Experiments |
Youtube |
| Saori Nakashita, Takeshi Enomoto |
Flow-Dependent Large-Scale Blending for Limited-Area Ensemble Data Assimilation |
Youtube |
| Shunji Kotsuki, Fumitoshi Kawasaki, Masanao Ohashi, Tadashi Tsuyuki |
Quantum Data Assimilation: A New Approach to Solving Data Assimilation on Quantum Annealers [Invitedt talk] |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Amos S. Lawless, Nancy K. Nichols |
Treating different timescales in weakly-coupled variational data assimilation |
Youtube |
| Argan Purcell, Pierre Brousseau, Loïk Berre, Sylvie Malardel |
Estimating background errors crossed covariances for an ocean-atmosphere coupled EDA |
Youtube |
| Sumit Kumar, Imranali M. Momin, K. Niranjan Kumar, Sukhwinder Kaur, Sushant Kumar, John P. George, V. S. Prasad |
Pre-operational performance of NCMRWF Coupled NWP system |
Youtube |
| Christoph Herbert, Peter Weston, Patricia de Rosnay, Sébastien Massart |
Outer loop coupled data assimilation for the land surface |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Takemasa Miyoshi |
Prediction Science: the fifth science integrating inductive and deductive sciences |
Youtube |
| Hannah L Cloke OBE |
Preparing for floods in an uncertain future: forecasting, warning and imagination |
Youtube |
Presentations in 2024
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Alan Geer |
Combining machine learning and data assimilation at ECMWF |
Youtube |
| Stephan Rasp |
The second revolution in numerical weather prediction and its implications for data assimilation |
Youtube |
| Ronan Fablet |
End-to-end neural data assimilation: from toy examples to uncertainty quantification with real ocean data |
Youtube |
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| Presenter |
Title |
Video |
| Marc Bocquet |
Bridging classical variational data assimilation and optimal transport |
Youtube |
| Olivier Goux |
Accounting for correlated observation error in variational ocean data assimilation |
Youtube |
| Arthur Filoche |
Data assimilation as variational inference. Full posterior estimation using the 4DVAR cost |
Youtube |
| Tracy Scanlon |
Deviation of skin increments using all-sky microwave observation for use in a coupled atmosphere-ocean system |
Youtube |
| Ziga Zaplotnik |
Towards higher resolution data assimilation in ECMWF IFS |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Eviatar Bach, Tim Colonius, Isabel Scherl, Andrew Stuart |
Filtering Dynamical Systems Using Observations of Statistics |
Youtube |
| Hao-Lun Yeh, Peter Jan van Leeuwen |
Unbiased fully nonlinear data assimilation: the Stochastic Particle Flow Filter |
Youtube |
| Vikrant Gupta, Minping Wan, Francesco Fossella, Luca Biferale, Massimo Cencini, Alberto Carrassi, Chunxue Yang |
DA for multi-time and multi-scale models of the turbulent energy cascade |
Youtube |
| Michael Tsyrulnikov, Arseniy Sotskiy |
Regularization of the ensemble Kalman filter using a non-stationary, non-parametric spatial model |
Youtube |
| Mohamad Abed El Rahman Hammoud, Naila Raboudi, Edriss S. Titi, Omar Knio, Ibrahim Hoteit |
Nonlinear Data Assimilation in Chaotic Systems Using Deep Reinforcement Learning |
N/A |
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| Presenter |
Title |
Video |
| George Craig, Tobias Selz |
The Limits of Predictability |
Youtube |
| Pin-Ying Wu, Tetsuya Takemi |
Impacts of Mountain Topography and Background Flow Conditions on the Predictability of Thermally Induced Thunderstorms and the Associated Error Growth |
Youtube |
| Eviatar Bach, V. Krishnamurthy, Safa Mote, Jagadish Shukla, A. Surjalal Sharma, Eugenia Kalnay, Michael Ghil |
Improved subseasonal prediction of South Asian monsoon rainfall using data-driven forecasts of oscillatory modes |
Youtube |
| Takeshi Enomoto, Saori Nakashita |
Ensemble sensitivity analysis for high-impact weather |
Youtube |
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| Presenter |
Title |
Video |
| Ashish Routray, D. Dutta, K. B. R. R. Hari Prasad, V. S. Prasad |
Developed a Rapid Update Cycle Data Assimilation system for Prediction of Severe Convective Weather Events |
Youtube |
| Alan Demortier, Olivier Caumont, Vivien Pourret, Marc Mandement |
Added value of assimilating near-ground observations from personal weather stations in AROME-France system |
Youtube |
| Lisa Neef, Klaus Stephan |
Enhancing Regional Forecasting Through Assimilation of Lightning and Nowcast Objects in ICON-LAM |
Youtube |
| Meenakshi Shenoy, V. S. Prasad, D. Srinivas, Suryakanti Dutta, K.B.R.R. Hari Prasad, P. V. S Raju |
Tropical Cyclone Forecasting: Impact of Convective Scale Data Assimilation |
N/A |
| Lukas Kugler, Martin Weissmann |
Ambiguity and nonlinearity in the assimilation of visible and infrared observations |
Youtube |
| Swapan Mallick, Jelena Bojarova, Xiaohua Yang |
High-resolution Data Assimilation and the Structure Function for the Copernicus Arctic Regional Second Generation Reanalysis |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Loïk Berre |
Innovation-based Diagnosis of Error Covariances |
Youtube |
| Tobias Necker, Ludwig Wolfgruber, Lukas Kugler, Martin Weissmann, Manfred Dorninger, Stefano Serafin |
The Fractions Skill Score for Ensemble Verification |
Youtube |
| Krishnamoorthy Chandramouli, Daniel Leuenberger, Claire Merker |
Diagnostics on 2m Temperature assimilation in the KENDA-CH1 system at MeteoSwiss |
Youtube |
| Giovanni Conti, C. Cardinali, G. De Goncalves |
EnFSOI-Jof: An Objective Approach for Computing Observation Impact in Observation Space |
Youtube |
| Bruce Ingleby |
Verification and diagnostic issues illustrated by the assimilation of Mode-S aircraft data |
Youtube |
| Olaf Stiller |
Can we diagnose/assess localization functions directly with observations? |
Youtube |
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| Presenter |
Title |
Video |
| Balla Maggero |
Artificial Neural Networks Approach to Predict and Forecasting Significant Wave Height Using Long Short-Term Memory (LSTM) |
N/A |
| Yicun Zhen, Valentin Resseguier, Bertrand Chapron |
A physics-based method for calculating the displacement of background field |
Youtube |
| Hamza Ruzayqat, Alexandros Beskos, Dan Crisan, Nikolas Kantas, Ajay Jasra |
Sequential Markov Chain Monte Carlo for Data Assimilation with Applications to Unknown Data Locations |
Youtube |
| Abhishek Lodh |
Ensemble Kalman filter based Land Data Assimilation for the Soil Diffusion based ISBA model |
Youtube |
| Qi Tang, Hugo Delottier, Wolfgang Kurtz, Lars Nerger, Oliver S. Schilling, Philip Brunner |
HGS-PDAF (version 1.0): a modular data assimilation framework for an integrated surface and subsurface hydrological model |
Youtube |
| Kobra Khosravian, Klaus Stephan, Jana Mendrok, Alberto De Lozar, Ulrich Blahak |
Latest Results of Including ZDR Column for Enhanced Radar Data Assimilation at German weather Service (DWD) |
Youtube |
Presentations in 2023
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Jeff ANDERSON |
A Quantile Conserving Ensemble Filtering Framework: Regressing Probit-Transformed Quantile Increments to Update Unobserved Variables |
Youtube |
| Hristo G. CHIPILSKI, Ian Grooms, Mohamad El Gharamti, Jeffrey Anderson, Ricardo Baptista |
Revisiting and Repurposing the Gaussian Anamorphosis EnKF |
Youtube |
| Ian GROOMS |
A two-step nonlinear non-Gaussian framework for data assimilation applied to assimilation of wind direction observations |
Youtube |
| Yue (Michael) YING, Jeffrey Anderson, Laurent Bertino |
Improving vortex position accuracy with a new multiscale alignment ensemble filter |
Youtube |
| Patrick N. RAANES |
"Ensemblized" linear least squares (LLS) |
N/A |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Norihisa Usui, Yosuke Fujii, Nariaki Hirose, Ichiro Ishikawa |
Improvement of the Ocean 4D-Var Scheme for High-Accuracy Sea Surface Temperature Analysis and Forecast |
Youtube |
| Nabir Mamnun, Christoph Völker, Mihalis Vrekoussis, Lars Nerger |
Estimation of Spatially and Temporally Varying Biogeochemical Parameters in a Global Ocean Model |
Youtube |
| Svetlana N. Loza, Marylou Athanase, Longjiang Mu, Jan Streffing, Miguel Andrés-Martínez, Lars Nerger, Tido Semmler, Dmitry Sidorenko, Helge F. Goessling |
Predicting the Sea-Ice and Ocean State by Combining Sea-Ice and Ocean Data Assimilation with Atmospheric Wind Nudging |
Youtube |
| Tsz Yan Leung, Amos S. Lawless, Nancy K. Nichols, Daniel J. Lea, Matthew J. Martin |
The Impact of Hybrid Oceanic Data Assimilation in a Coupled Model: A Case Study of a Tropical Cyclone |
N/A |
| Zofia Stanley, Clara Draper, Sergey Frolov, Laura Slivinski, Wei Huang, Jeffrey Whitaker, Henry Winterbottom |
Guidance on Localization for Strongly Coupled Atmosphere-Ocean Data Assimilation |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Yoshiaki Sato |
Current status and Future Prospects of Data Assimilation Systems for Operational Numerical Weather Prediction Systems in Japan Meteorological Agency |
N/A
(The link is available upon request to the ISDA-Online organizers.) |
| Florence Rabier |
Developments and prospects for the ECMWF Data Assimilation system |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Indira Rani |
Use of satellite data in an operational NWP Data Assimilation System |
Youtube |
| Annika Schomburg, Christoph Schraff, Liselotte Bach, Robin Faulwetter, Christina Köpken-Watts |
Towards the operational assimilation of all-sky water vapour SEVIRI channels in our regional ensemble Kalman filter assimilation system |
Youtube |
| Xin Li, Xiaolei Zou |
Several Measures for Improving the CrIS All-sky Infrared Radiance Assimilation |
Youtube |
| Samuel K. Degelia, Xuguang Wang |
Assimilation of GOES-16 ABI all-sky radiance observations in RRFS using hybrid EnVar: Development and impacts for a severe convective event |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Shunji Kotsuki, Takumi Saito, Mao Ouyang, Daiya Shiojiri |
Combining Data Assimilation and Data-driven Sparse Sensing Placement Method For Designing Better Observation Locations |
Youtube |
| Martin Vojta, Andreas Plach, Rona L. Thompson, Andreas Stohl |
Critical remarks on inverse modeling techniques |
Youtube |
| Luca Cantarello, Nicolas Bousserez, Panagiotis Kountouris, Massimo Bonavita, Richard Engelen |
Data assimilation developments for a new emission inversion system at ECMWF |
Youtube |
| Alan Geer |
Simultaneous inference of sea ice state and surface emissivity model using machine learning and data assimilation |
Youtube |
| Yohei Sawada, Le Duc |
An Efficient Estimation of Time-Varying Parameters of Dynamic Models by Combining Offline Batch Optimization and Online Data Assimilation |
Youtube |
| Sujeong Lim, Seon Ki Park, Claudio Cassardo |
Parameter estimations in Land Surface Model |
Youtube |
Presentations in 2022
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Moha Gharamti |
The Data Assimilation Research Testbed in 2022 and Beyond: Not Your Parents' DART |
Youtube |
| Hisashi Yashiro |
A global 3.5km-mesh 1024-member ensemble data assimilation benchmark - Our challenges on the supercomputer Fugaku |
N/A |
| Arata Amemiya |
1000-member 30-second-update real-time precipitation forecast experiment using the supercomputer Fugaku |
Youtube |
| Sebastian Friedemann |
Melissa-DA: An Elastic and Fault Tolerant Large-Scale Online Data Assimilation Framework |
Youtube |
| Chao Sun |
Developing a common, flexible and efficient framework for weakly coupled ensemble data assimilation based on C-Coupler2 |
Youtube |
| Lars Nerger |
PDAF - community software for ensemble-based data assimilation |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Olivier Talagrand |
A Brief History of Data Assimilation |
Youtube |
| Michael Ghil |
Data Assimilation: From an Eventful Past to a Bright Future |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Sergey Frolov |
Findings from the CLIVAR workshop on future U.S. earth system reanalysis efforts |
Youtube |
| Lucie Bakels |
A Lagrangian translation of the ERA-5 re-analysis |
Youtube |
| Andrea Storto |
Towards systematic inter-comparison of ocean reanalyses and statistical mapping methods for long-term ocean heat content estimation |
Youtube |
| Kevin Raeder |
A CESM+DART Atmospheric Reanalysis for Forcing Ocean, Land, and Other Surface Models |
Youtube |
| Shun Ohishi |
LETKF-based Ocean Research Analysis (LORA) in the Western North Pacific region |
Youtube |
| Hao Zuo |
A preliminary evaluation of the ECMWF ORAS6 ocean and sea-ice reanalysis with ensemble ocean DA system |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Katrin Lonitz |
Running Ensemble of Data Assimilation Experiments - using GNSS-RO and MW sounding data |
Youtube |
| Bruce Ingleby |
Seasonality of the impact of stratospheric observations at high latitudes |
Youtube |
| Erica L. McGrath-Spangler |
Impacts of Assimilating Infrared Sounders from Geostationary Orbit |
Youtube |
| Gimena Casaretto |
Ensemble Forecast Sensitivity to Observations Impact (EFSOI) applied to a regional data assimilation system over Argentina |
Youtube |
| Philipp Griewank |
Using ensemble sensitivities to estimate the benefit of wind lidars |
Youtube |
| Olaf Stiller |
Covariance based impact diagnostics for cross-validating the consistent use of different observation types |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Kenta Ochi |
Recent activities on snow data assimilation for NWP and reanalysis at ECMWF |
Youtube |
| Sujeong Lim, Seon Ki Park, Milija Zupanski |
Assimilation Impacts of SMAP Soil Moisture Retrievals within Strongly Coupled Atmosphere-Land Surface Data Assimilation System |
N/A |
| Yohei Sawada |
Ecohydrological land reanalysis by assimilating satellite microwave observations into a land surface model |
Youtube |
| Akhilesh S. Nair |
Improving sub-seasonal prediction skill of NorCPM using soil moisture assimilation |
Youtube |
| Brett Raczka |
Improving the Representation of Land Surface Processes using the Data Assimilation Research Testbed (DART) |
Youtube |
| Michel Bechtold |
Improving streamflow simulation by assimilating Sentinel-1 backscatter into a land surface model with river routing |
Youtube |
Presentations in 2021
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Roland Potthast |
Feature Data Assimilation - Theory, Algorithms and Examples |
Youtube |
| Xinfeng Gao |
Space-Time Multigrid for the Maximum Likelihood Ensemble Filter Method |
Youtube |
| Oliver Guillet |
A method for representing spatially correlated observation errors for wind data |
Youtube |
| Flavia Pinheiro |
Efficient nonlinear data assimilation using synchronization in a particle filter |
Youtube |
| Jeff Whitaker |
Understanding the differences between EnVar and LETKF solvers in an operational NWP setting |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Yasutaka IKUTA |
Assimilation of GPM DPR Spectral Latent Heating using Vertical Correlated Observation Error Covariance in Kalman Gain |
Youtube |
| James Taylor |
Oversampling Reflectivity Observations from a Geostationary Precipitation Radar Satellite: Impact to Typhoon Forecasts within a Perfect Model OSSE Framework |
Youtube |
| Renaud Hostache |
A tempered particle filter for jointly assimilating satellite soil moisture and flood extent maps into a flood inundation model |
Youtube |
| Jyoti Bhate |
Role of Scatterometer Data Assimilation in the simulation of boundary layer flow of tropical cyclones |
Youtube |
| Marta Janisková |
Experimental assimilation of space-borne cloud radar and lidar observations directly in the 4D-Var system used at ECMWF |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Rebecca Atkinson |
Mitigating Sampling Error using Optimal Localisation in Ensemble Data Assimilation |
Youtube |
| Ricardo Baptista |
Ensemble-based data assimilation via nonlinear couplings |
Youtube |
| Shay Gilpin |
Continuum Covariance Propagation for Understanding Variance Loss in Advective Systems |
Youtube |
| Geir Evensen |
A subspace iterative ensemble smoother for solving DA and inverse problems |
Youtube |
| Jonathan Poterjoy |
High-dimensional Data Assimilation using Regularization and Iterative Resampling with the Local Particle Filter |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Joshua McCurry |
Exploring Particle Filtering Strategies for Convective-scale Weather Forecasting |
Youtube |
| Tadashi Fujita |
Assimilation of Radial Winds with Observation Error Correlated in Time and Space |
Youtube |
| Leonhard Scheck |
Using visible satellite images in convective-scale data assimilation |
Youtube |
| Pauline Combarnous |
An observation operator for geostationary lightning imager data assimilation in storm-scale numerical weather prediction systems |
Youtube |
| Pierre Brousseau |
AROME-France 4DEnVar: A data assimilation system for NWP at convective scale |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Sergey Frolov |
Coupled Ocean-Atmosphere Covariances in Global Ensemble Simulations: Impact of an Eddy-Resolving Ocean |
Youtube |
| Qi Tang |
Strongly coupled data assimilation with the coupled ocean-atmosphere model AWI-CM: comparison with the weakly coupled data assimilation |
Youtube |
| Zofia Stanley |
Multivariate localization functions for strongly coupled data assimilation |
Youtube |
| Bo Huang |
Development of Global Ensemble-based Data Assimilation System in JEDI for Aerosol Forecasting and Reanalysis using the GEFS-Aerosols Model |
Youtube |
| Alberto Carrassi |
Data assimilation in coupled chaotic dynamics and its combination to machine learning to infer unresolved scale error |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Longjiang Mu |
The Seamless Sea Ice Prediction System Based on AWI-CM |
Youtube |
| Angelica M. Castillo |
Reconstructing the Dynamics of the Outer Electron Radiation Belt by Means of the Standard and Ensemble Kalman Filter with the VERB-3D Code |
Youtube |
| Yohei Sawada |
Socio-Hydrological Data Assimilation: Analyzing Human-Flood Interactions by Model-Data Integration |
Youtube |
| Maximilian Hamm |
Estimating Thermophysical Properties of Asteroid (162173) Ryugu Using Data Assimilation |
Youtube |
| Reyko Schachtschneider |
Inferring Mantle Viscosity Through Data Assimilation of Relative Sea-Level Observations in a Glacial Isostatic Adjustment Model |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Naila F. Raboudi |
Ensemble Kalman filtering with colored observation noise |
N/A |
| Samuel K. Degelia |
Impacts of Flow-dependent and Static Observation Error Estimation for the Frequent Assimilation of Thermodynamic Profilers on Convective-scale Forecasts |
Youtube |
| Hao-Lun Yeh |
Including observation error correlation for ensemble radar radial wind assimilation and its impact on heavy rainfall prediction |
Youtube |
| Jérémy Briant |
Background error covariance matrix estimation from multifidelity ensembles |
Youtube |
| Clara Draper |
Accounting for land model uncertainty in numerical weather prediction ensemble systems: toward ensemble-based coupled land/atmosphere data assimilation |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Shih-Wei Wei |
Toward Aerosol-aware Data Assimilation System: Accounting for Aerosol Transmittance Effects on Radiance Observation Operator |
Youtube |
| Louie Grasso |
Satellite Imagery and Products of the 16-17 February 2020 Saharan Air Layer Dust Event over the Eastern Atlantic: Impacts of Water Vapor on Dust Detection and Morphology |
Youtube |
| Louie Grasso |
A fast visible-wavelength 3D radiative transfer model for numerical weather prediction visualization and forward modeling |
Youtube |
| Tie Dai |
Aerosol Data Assimilation using the Four-Dimensional Local Ensemble Transform Kalman Filter |
Youtube |
| Xinxin Ye |
Constraining Vertical Allocation of Wildfire Emissions using Airborne DIALHSRL Observations during FIREX-AQ |
Youtube |
Download Abstracts [PDF]
| Presenter |
Title |
Video |
| Daisuke Hotta |
VAE as a Stochastic Multidimensional Extension to Gaussian Anamorphosis |
Youtube |
| Quentin Malartic |
State, Global and Local Parameter Estimation using Local Ensemble Kalman Filters: Applications to Online Machine Learning of Chaotic Dynamics |
N/A |
| Lucia Minah Yang |
Machine Learning Techniques to Construct Patched Analog Ensembles for Data Assimilation |
Youtube |
| Maria Aufschlager |
Deep Learning for Retrieving Terrestrial Water Storage (TWS) from Spaceborne Gravity Observations and Satellite Altimetry |
Youtube |
| Maximiliano A. Sacco |
Forecast Uncertainty for Data Assimilation using Neural Network |
Youtube |
