PPT-Hybrid Variational/Ensemble Data Assimilation

for the NCEP GFS Tom Hamill for Jeff Whitaker NOAA Earth System Research Lab Boulder CO USA jeffreyswhitakernoaagov Daryl Kleist Dave Parrish and John Derber National Centers for Environmental Prediction Camp Springs MD USA. P. Lewis. What is Data Assimilation?. Optimal merging of models and data. Models. Expression of current understanding about process. E.g. terrestrial C model. Data. Observations. E.g. EO. . Some basic stats. 4D-Ensemble-Var – a development path for data assimilation at the Met Office. Probabilistic Approaches to Data Assimilation for Earth Systems. , . BIRS, Banff, February 2013.. Andrew Lorenc. Outline of Talk. Andrew Collard, Daryl . Keist. , David Parrish, Ed Safford, Emily Liu, Manuel . Pondeca. , . Miodrag. . Rancic. , Lidia . Cucurull. , . Haixia. Liu, . XiuJuan. Su, Shun Liu, Wan-. Shu. Wu, Paul van . Kalman. Filters. Yun Liu. Dept. of Atmospheric and Oceanic . Science, University of Maryland  . Atmospheric and oceanic . s. ciences and Center for Climatic . R. esearch, UW-Madison. Collaborators: X. . Yudong. Gao. 1 observational data analysis. Pictures are from P. W. Chan et al. (2014). Left figure is the reconnaissance data from 9:06 to 9:59 UTC, which is thinning at 3km. . data from 12:00 to 12:12 UTC. The direction of wind was changing as the flight direction.. Applying data assimilation for rapid forecast updates in global weather models. Luke E. Madaus --- Greg Hakim; Cliff Mass. University of Washington. In Revision -- QJRMS. Outline. Brief introduction. EGU 2012, Vienna. Michail Vrettas. 1. , Dan Cornford. 1. , Manfred Opper. 2. 1. NCRG, Computer Science, Aston University, UK. 2. Technical University of Berlin, Germany. Why do data assimilation?. Aim of data assimilation is to estimate the posterior distribution of the state of a dynamical model (X) given observations (Y). Gregory Carmichael(1), . Pablo . E. . Saide. (NCAR), . Meng. . Gao. (1), Maryam . Abdioskouei. (1), . Arlindo da Silva (NASA GSFC), R. Brad Pierce (NOAA NESDIS-STAR), David G. Streets (ANL), . Jhoon. Kalman. filter. Part I: The Big Idea. Alison Fowler. Intensive course on advanced data-assimilation methods. 3-4. th. March 2016, University of Reading. Recap of problem we wish to solve. Given . prior knowledge . When one cultural group adapts to another cultural group’s way of life. Language, religion, way of life is abandoned. Cultural differences then disappear. Cultural “uniformity” is created. Can be done voluntarily. Earl -- 2010. 45-km outer domain. 15-km moving nest. Best Track. Ensemble Members. Relocated Nest. COAMPS-TC Forecast Ensemble. Web Page Interface. http://www.nrlmry.navy.mil/coamps-web/web/ens?&spg=1. in the NCEP Global Forecast System. 1. Ting-Chi Wu. 1. , Lewis Grasso. 1. , . Milija. Zupanski. 1. , Heather Cronk. 1. , . James Fluke. 1. , Richard Schulte. 2. , Wesley Berg. 2. , Anton Kliewer. 1. Mihail. Codrescu. 1. , Stefan Codrescu. 1,2. , . Mariangel. Fedrizzi. 1,2. , and Claudia Borries. 3. 1. Space Weather Prediction Center, Boulder, United States of America (. mihail.codrescu@noaa.gov. Jeremy Berman. University at Albany. Thursday 03 May 2018. ATM 419/563. Outline. Data Assimilation (DA). At the end, you should know:. What is it?. How it works?. Why is it important?. Basic DA techniques.