Data Assimilation Seminar Series

Next Seminar

Date & Time

10:30 - 12:00am Friday 5th November 2021

Place & Contact Video meeting
To join the video meeting, please contact the following address in advance.
da-seminar(please remove here)@riken.jp
Language English
Speaker

Dr. Philippe Baron (National Institute of Information and Communications Technology)

Title

TBD

Abstract

TBD

Archives

Number Date Speaker Title (click the title to see abstract & PDF)

2021-09

(81th)

September 30,
2021
Dr. Shunsuke Noguchi (JAMSTEC) Gravity wave resolving prediction experiments by using a Japanese Atmospheric GCM for Upper Atmosphere Research (JAGUAR) and its data assimilation product

2021-08

(80th)

July 16,
2021
Dr. Milija Zupanski
(Cooperative Institute for Research in the Atmosphere)
An ensemble data assimilation method with state-space covariance localization and global numerical optimization

2021-07

(79th)

June 23,
2021
Dr. Akira Yamazaki
(JAMSTEC)
EFSO at different geographical locations verified with observing-system experiments

2021-06

(78th)

April 14,
2021
Dr. Pierre Tandeo
(IMT Atlantique)
Narrowing uncertainties in climate projections using data science tools

2021-05

(77th)

April 9,
2021
Mr. Thomas Hitchcock
(University of St Andrews)
Conflicts and trade-offs in relation to sex

2021-04

(76th)

March 31,
2021
Dr. Yicun Zhen
(Ifremer & IMT Atlantique) &
Dr. Arata Amemiya
(R-CCS)
Location uncertainty from another point of view/ Connecting Data Assimilation and Neural ODE

2021-03

(75th)

March 18,
2021
Dr. Maha Mdini
(R-CCS) &
Dr. Simon Benaïchouche
(IMT Atlantique & e-odyn)
Accelerating Climate Model Computation by Neural Networks/ Variational learning of sea surface current reconstructions from AIS data streams

2021-02

(74th)

March 3,
2021
Mr. Aurélien Colin
(IMT Atlantique & CLS, France) &
Dr. Hirotaka Hachiya
(Wakayama University, Japan)
Semantic Segmentation of Metocean Processes and Estimation of Ancillary Data/ Spatio-temporal integration of forecast guidance outputs using U-Net

2021-01

(73rd)

February 17,
2021
Dr. Takemasa Miyoshi
(R-CCS, Japan)
Big Data, Big Computation, and Machine Learning in Numerical Weather Prediction.

2020-12

(72nd)

December 8,
2020
Dr. Maha Mdini
(R-CCS, Japan)
Accelerating Climate Model Computation by Neural Networks: A comparative study.

2020-06

(71st)

November 20,
2020
Dr. Koji Terasaki
(R-CCS, Japan)
Including the horizontal observation error correlation in the assimilation of AMSU-A data.

2020-05

(70th)

October 1,
2020
Prof. Shu-Chih Yang
(NCU, Taiwan)
Recent improvements of the NCU convective-scale ensemble data assimilation system and their impact on short-term precipitation prediction in Taiwan.

2020-04

(69th)

September 11,
2020
Prof. Shunji Kotsuki and Dr. Keiichi Kondo
(Chiba University and JMA-MRI)
A local particle filter based on non-Gaussian statistics using an intermediate AGCM (Dr. Kondo). A Local Particle Filter and Its Gaussian Mixture Extension: Experiments with an Intermediate AGCM (Prof. Kotsuki)

2020-03

(68th)

July 20,
2020
Prof. Yohei Sawada
(University of Tokyo)
Advancing hydrometerological prediction by the integration of process-based simulation and machine learning

2020-02

(67th)

June 10,
2020
Dr. Guo-Yuan Lien
(CWB, Taiwan)
Recent data assimilation work at Taiwan’s Central Weather Bureau (CWB) and perspectives on its global NWP development

2020-01

(66th)

May 1,
2020
Dr. James Taylor
(R-CCS)
Oversampling Reflectivity Observations from a Geostationary Precipitation Radar Satellite: Impact on Typhoon Forecasts within an OSSE Framework

2019-13

(65th)

Dec 2,
2019
Dr. Shun Ohishi
(Nagoya University)
An LETKF-based ocean data assimilation system for the Asia-Oceania region

2019-12

(64th)

Oct 25,
2019
Dr. Naoto Nakano
(Kyoto University)
Data driven modeling using reservoir dynamics

2019-11

(63th)

Sep 30,
2019
Prof. Michael Ng
(Hong Kong University)
Robust Tensor Completion and Its Applications

2019-10

(62th)

Sep 10,
2019
Prof. Shu-Chih Yang
(National Central University, Taiwan)
Recent developments and challenges of the regional ensemble data assimilation system for high-impact weather prediction in Taiwan

2019-9

(61th)

Aug 21,
2019
Dr. Shigenori Otsuka
(RIKEN R-CCS)
RIKEN Nowcast: optical flow and machine learning

2019-8

(60th)

July 3,
2019
Dr. Tse-Chun Chen
(University of Maryland)
How to improve forecasts by identifying and deleting detrimental observations

2019-7

(59th)

May 31,
2019
Professor Serge Guillas
(U College London)
Statistical emulation to quantify uncertainties in tsunami modelling using high performance computing

2019-6

(58th)

May 7,

2019

Prof. Ming-Cheng Shiue
(NCTU)
Mathematical analysis of data assimilation algorithms based on synchronization of truth and models

2019-5

(57th)

Apr 25,

2019

Dr. Atsushi Okazaki
(RIKEN R-CCS)
Impact of geostationary satellite borne precipitation radar on numerical weather prediction: An observing system simulation experiment with an ensemble Kalman filter for a typhoon case

2019-4

(56th)

Feb 1,

2019

Dr. Tie Dai
(LASG, IAP,CAS)
Development and application of aerosol data assimilation in NICAM

2019-3

(55th)

Jan 28,

2019

Ms. Jemima Tabeart
(U of Reading)

Using reconditioning to study the impact of correlated observation errors in the Met Office 1D-Var system

2019-2

(54th)

Jan 28,

2019

Dr. Alison Fowler
(U of Reading)

Data compression in the presence of observation error correlations

2019-1

(53th)

Jan 18,

2019

Prof. Eugenia Kalnay
(U of Maryland)

Can large-scale solar and wind farms create a significant climate change? A model experiment in the Sahara

2018-12

(52th)

Dec 19,

2018

Dr. Tetsuo Nakazawa
(JMA MRI)

Is the Trend in Tropical Cyclone Formation Frequency due to Global Warming?

2018-10

(51th)

Nov 13,

2018

Prof. Roland Potthast
(DWD/U of Reading)

New Observations and Algorithmic Developments for Convective Scale Ensemble Data Assimilation

2018-09

(50th)

Oct 25,

2018

Dr. Jing-Shan Hong
(CWB, Taiwan)

Re-Center algorithm on the Continuous Cycling Radar Data Assimilation: Multi-scale Blending Scheme

2018-08

(49th)

Jul 27,

2018

Prof. Pierre Tandeo

(IMT Atlantique)

Data-driven methods in geophysics
2018-07 (48th)

Jul 27,

2018

Dr. Hironori Arai

(U Tokyo)

Establishing an integrated MRV system of Greenhouse gas emission from wetlands with Japanese earth-observation/modelling technologies and a data assimilation technique
2018-06 (47th) Jun 28, 2018 Prof. John C. Wells
(Ritsumeikan U)
Towards nowcasting in Lake Biwa: field tests of acoustic tomography, and discussion of some theorems relating the flow at a water surface to that below
2018-05 (46th) Apr 17, 2018 Dr. Kohei Takatama
(R-CCS)
Regional atmospheric data assimilation coupled with an ocean mixed layer model: a case of typhoon Soudelor (2015)
2018-04 (45th) Feb 16, 2018 Prof. Pierre Tandeo
(IMT Atlantique)
The analog data assimilation: method, applications and implementation
2018-03 (44th) Feb 9, 2018 Prof. Roland Potthast
(DWD/U of Reading)
Data Assimilation From Minutes to Days
2018-02 (43rd) Jan 29, 2018 Dr. Shinsuke Satoh
(NICT)
Three-dimensional precipitation data measured by phased array weather radar every 30 seconds
2018-01 (42nd) Jan 18, 2018 Prof. David J. Stensrud
(Penn State U)
(Canceled)
2017-16 (41st) Dec 11, 2017 Dr. Tsuyoshi Thomas Sekiyama
(Meteorological Research Institute, Japan Meteorological Agency)
Data assimilation of atmospheric chemistry: past, present, and future
2017-15 (40th) Nov 17, 2017 Prof. Yusuke Uchiyama
(Kobe U)
Challenges and issues in forward regional ocean modeling: Eddies, terrestrial influences, and surface gravity waves
2017-14 (39th) Oct 12, 2017 Mr. Krishnamoorthy Chandramouli
(IIT Madras)
Dr. Koji Terasaki
(R-CCS)
Impact of assimilating humidity sounder radiances with the NICAM-LETKF system
2017-13 (38th) Sep 26, 2017 Mr. Cheng Da
(U of Maryland)
Dr. Guo-Yuan Lien
(RIKEN AICS)
Assimilation of the GSMaP Precipitation Data with the SCALE-LETKF System
2017-12 (37th) Aug 16, 2017 Ms. Paula Maldonado
(CONICET-U of Buenos Aires)
Radar Data Assimilation in a Case of Deep Convection in Argentina
2017-11 (36th) Aug 16, 2017 Mr. Sam Hatfield
(Oxford U)
How low can you go? Reducing the precision of data assimilation to improve forecast skill
2017-10 (35th) Aug 4, 2017 Dr. Chih-Chien Tsai
(TTFRI, Taiwan)
Preliminary Experimental Results of Polarimetric Radar Data Assimilation in the Case of Typhoon Soudelor (2015)
2017-09 (34th) Jun 26, 2017 Dr. Toshio Iguchi
(NICT)
Radar Measurement of Precipitation from Space: TRMM/PR and GPM/DPR rain retrieval algorithms data
2017-08 (33rd) May 18, 2017 Dr. Guo-Yuan Lien
(RIKEN AICS)
30-second-cycle convection-resolving data assimilation of dense phased array weather radar data
2017-07 (32nd) Mar 7, 2017 Dr. Alison Fowler
(U of Reading)
On the interaction of observation and a-priori error correlations in data assimilation
2017-06 (31st) Mar 7, 2017 Dr. Joanne A. Waller
(U of Reading)
Diagnosing observation error statistics for numerical weather prediction
2017-05 (30th) Mar 7, 2017 Prof. Nancy K. Nichols
(U of Reading)
New applications and challenges in data assimilation
2017-04 (29th) Mar 6, 2017 Prof. Steven J. Greybush
(Penn State U)
Ensembles, Data Assimilation, and Predictability for Winter Storms
2017-03 (28th) Mar 6, 2017 Prof. Eugenia Kalnay
(U of Maryland)
Modeling Sustainability: Coupling Earth and Human System Models
2017-02 (27th) Feb 7, 2017 Prof. Hiromichi Nagao
(U of Tokyo)
Promises and Challenges in Assimilation of Infrared and Microwave All-sky Satellite Radiances for Convection-Permitting Analysis and Prediction
2017-01 (26th) Jan 13, 2017 Prof. Fuqing Zhang
(Penn State U)
Data assimilation for massive autonomous systems based on a second-order adjoint method
2016-09 (25th) Dec 22, 2016 Dr. Takahiro Nishimichi
(Kavli IPMU, U of Tokyo)
Dark Emulator: cosmic large-scale structures and parameter estimate
2016-08 (24th) Dec 21, 2016 Dr. Takumi Honda
(RIKEN AICS)
Assimilating All-Sky Himawari-8 Satellite Infrared Radiances: Preliminary Case Studies
2016-07 (23rd) Nov 24, 2016 Mr. Yasumitsu Maejima
(RIKEN AICS)
Impacts of dense and frequent surface observations on a sudden severe rainstorm forecast: A case of an isolated convective system
2016-06 (22nd) June 13, 2016 Mr. Yasutaka Ikuta
(JMA)
Assimilation of GPM/DPR at JMA
2016-05 (21st) Apr 14, 2016 Dr. Yohei Sawada
(RIKEN AICS)
Advancing land data assimilation science to monitor terrestrial water and vegetation dynamics
2016-04 (20th) Mar 16, 2016 Dr. Juan Ruiz
(U Buenos Aires (CIMA)/RIKEN AICS)
Implementation and evaluation of a regional data assimilation system based on WRF-LETKF
2016-03 (19th) Mar 7, 2016 Prof. Roland Potthast
(DWD/U of Reading)
On Ensemble and Particle Filters for Large-Scale Data Assimilation
2016-02 (18th) Mar 2, 2016 Ms. Chang Yaping
(CAS)
Dr. Shunji Kotsuki
(RIKEN AICS)
Ensemble data assimilation of MODIS surface temperature into land surface model
2016-01 (17th) Feb 17, 2016 Mr. Sho Yokota
(JMA MRI)
Comparison between LETKF and EnVAR with observation localization
2015-10 (16th) Dec 25, 2015 Dr. Shunji Kotsuki
(RIKEN AICS)
Ensemble Data Assimilation of GSMaP precipitation into the nonhydrostatic global atmospheric model NICAM
2015-09 (15th) Dec 15, 2015 Dr. Kozo Okamoto
(MRI-JMA/RIKEN AICS)
Assimilation of cloud-affected infrared radiances
2015-08 (14th) Oct 21, 2015 Prof. Kosuke Ito
(U of the Ryukyus)
Advanced data assimilation techniques for predicting tropical cyclone intensities
2015-07 (13th) Sep 16, 2015 Mr. Shumpei Terauchi
(U of Tsukuba)
Dr. Guo-Yuan Lien
(RIKEN AICS)
Verification of the near-real-time weather forecasts and study on 2015 typhoon Nangka with the SCALE-LETKF system
2015-06 (12th) Sep 2, 2015 Dr. Daisuke Hotta
(JMA)
Diagnostic methods for ensemble data assimilation
2015-05 (11th) Jun 25, 2015 Dr. Koji Terasaki
(RIKEN AICS)
Applying the Local Transform Ensemble Kalman Filter to the non-hydrostatic atmospheric model NICAM
2015-04 (10th) Jun 5, 2015 Prof. S. Lakshmivarahan
(U of Oklahoma)
Nonlinear dynamics and Predicitability
2015-03 (9th) Apr 17, 2015 Prof. Takeshi Enomoto
(Kyoto U/JAMSTEC)
Assimilation and forecast experiments using bright band heights
2015-02 (8th) Mar 24, 2015 Dr. Shigenori Otsuka
(RIKEN AICS)
Towards 100-m resolution prediction of local convective storms: predictability and nowcasting
2015-01 (7th) Jan 20, 2015 Dr. Nobumasa Komori
(JAMSTEC)
Development of an ensemble-based data assimilation system with a coupled atmosphere-ocean GCM
2014-06 (6th) Dec 26, 2014 Dr. Keiichi Kondo
(RIKEN AICS)
The 10,240-member ensemble Kalman filtering with an intermediate AGCM without localization
2014-05 (5th) Nov 26, 2014 Prof. Shin-ichiro Shima
(U of Hyogo/RIKEN AICS)
Data assimilation experiments of the dynamic global vegetation model SEIB-DGVM with simulated GPP observations
2014-04 (4th) Nov 26, 2014 Prof. Takeshi Ise
(Kyoto U)
Simulating terrestrial ecosystems: current progress and future perspectives
2014-03 (3rd) Oct 31, 2014 Prof. Masayuki Yokozawa
(Shizuoka U)
Evaluating the productivities of major crops at the global scale using process-based crop model
2014-02 (2nd) Sep 10, 2014 Dr. Guo-Yuan Lien
(RIKEN AICS)
Ensemble Assimilation of Global Large-scale Precipitation
2014-01 (1st) July 23, 2014 Dr. Juan Ruiz
(U of Buenos Aires (CIMA)/RIKEN AICS)
Efficient parameter estimation for numerical weather prediction models using data assimilation

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