OSSEs for an Ensemble 3DVAR Data Assimilation System with Radar Observations of Convective Storms

Error modeling of simulated reflectivity observations for ensemble Kalman filter assimilation of convective storms

[1] The impact of two different ways of modeling errors in simulated radar reflectivity data for observing system simulation experiments (OSSEs) with an ensemble Kalman filter is investigated. An error model different from the one used in earlier studies is introduced, and it specifies relative Gaussian-distributed errors in the linear domain of the equivalent radar reflectivity factor. This mo...

Assimilation of Radar Radial Velocity Data with the WRF Hybrid Ensemble–3DVAR System for the Prediction of Hurricane Ike (2008)

An enhanced version of the hybrid ensemble–three-dimensional variational data assimilation (3DVAR) system for the Weather Research and Forecasting Model (WRF) is applied to the assimilation of radial velocity (Vr) data from two coastal Weather Surveillance Radar-1988 Doppler (WSR-88D) radars for the prediction of Hurricane Ike (2008) before and during its landfall. In this hybrid system, flow-d...

Assimilation of Radar Radial Velocity Data with the WRF Ensemble- 3DVAR Hybrid System for the Prediction of Hurricane Ike (2008)

An enhanced version of the hybrid ensemble-3DVAR data assimilation system for the WRF model is applied to the assimilation of radial velocity (Vr) data from two coastal WSR-88D radars for the prediction of Hurricane Ike (2008) before and during its landfall. In this hybrid system, flow-dependent ensemble covariance is incorporated into the varitional cost function using the extended control var...

Ensemble Assimilation of Doppler Radar Observations

The final goal of this project is to provide the US Navy with an increased capability of using Doppler radar observations in the detection and prediction of hazardous weather events that usually have a strong randomness in nature and affect the Navy operations, especially over oceans and in remote areas. By developing a high-resolution data assimilation capability that can effectively assimilat...

University of Oklahoma Graduate College Assimilation of Casa and Wsr-88d Radar Data for Tornadic Convective Storms Using an Ensemble Kalman Filter and Applications in Probabilistic Ensemble Forecasting