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RISPreemptive Forecasts Using an Ensemble Kalman Filter
Publisher: American Meteorological Society
Abstract: An ensemble Kalman filter (EnKF) estimates the error statistics of a model forecast using an ensemble of model forecasts. One use of an EnKF is data assimilation, resulting in the creation of an increment to the first-guess ...
Resilience of Hybrid Ensemble/3DVAR Analysis Schemes to Model Error and Ensemble Covariance Error
Publisher: American Meteorological Society
Abstract: Previous idealized numerical experiments have shown that a straightforward augmentation of an isotropic error correlation matrix with an ensemble-based error correlation matrix yields an improved data assimilation scheme ...
Targeting and Data Assimilation Studies during Hurricane Humberto (2001)
Publisher: American Meteorological Society
Abstract: Two operational synoptic surveillance missions were conducted by the National Oceanic and Atmospheric Administration into Hurricane Humberto (2001). Forecasts from two leading dynamical hurricane track forecast models were ...
Adaptive Sampling with the Ensemble Transform Kalman Filter. Part I: Theoretical Aspects
Publisher: American Meteorological Society
Abstract: A suboptimal Kalman filter called the ensemble transform Kalman filter (ET KF) is introduced. Like other Kalman filters, it provides a framework for assimilating observations and also for estimating the effect of observations ...
An Observing System Experiment for Tropical Cyclone Targeting Techniques Using the Global Forecast System
Publisher: American Meteorological Society
Abstract: In 1997, the National Oceanic and Atmospheric Administration?s National Hurricane Center and the Hurricane Research Division began operational synoptic surveillance missions with the Gulfstream IV-SP jet aircraft to improve ...