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Mitigating Observation Perturbation Sampling Errors in the Stochastic EnKF
Publisher: American Meteorological Society
Abstract: he stochastic ensemble Kalman filter (EnKF) updates its ensemble members with observations perturbed with noise sampled from the distribution of the observational errors. This was shown to introduce noise into the system ...
Impact of Resolution and Optimized ECCO Forcing on Simulations of the Tropical Pacific
Publisher: American Meteorological Society
Abstract: The sensitivity of the dynamics of a tropical Pacific Massachusetts Institute of Technology (MIT) general circulation model (MITgcm) to the surface forcing fields and to the horizontal resolution is analyzed. During runs ...
A New Approximate Solution of the Optimal Nonlinear Filter for Data Assimilation in Meteorology and Oceanography
Publisher: American Meteorological Society
Abstract: This paper introduces a new approximate solution of the optimal nonlinear filter suitable for nonlinear oceanic and atmospheric data assimilation problems. The method is based on a local linearization in a low-rank kernel ...
Improving Short-Range Ensemble Kalman Storm Surge Forecasting Using Robust Adaptive Inflation
Publisher: American Meteorological Society
Abstract: his paper presents a robust ensemble filtering methodology for storm surge forecasting based on the singular evolutive interpolated Kalman (SEIK) filter, which has been implemented in the framework of the H∞ filter. By ...
Data Assimilation within the Advanced Circulation (ADCIRC) Modeling Framework for Hurricane Storm Surge Forecasting
Publisher: American Meteorological Society
Abstract: ccurate, real-time forecasting of coastal inundation due to hurricanes and tropical storms is a challenging computational problem requiring high-fidelity forward models of currents and water levels driven by hurricane-force ...
A Comparison of Ensemble Kalman Filters for Storm Surge Assimilation
Publisher: American Meteorological Society
Abstract: his study evaluates and compares the performances of several variants of the popular ensemble Kalman filter for the assimilation of storm surge data with the advanced circulation (ADCIRC) model. Using meteorological data ...