Monday, 12 January 2004: 4:30 PM
Experiments with an ensemble Kalman filter for convective-scale data assimilation
Room 3AB
Forecasts of moist convective storms represent an important
frontier for numerical weather prediction. A principal
difficulty is to produce initial conditions through the
assimilation of reflectivity and radial velocity observations
from Doppler radars.
Recent results from assimilation experiments with an ensemble Kalman filter and both simulated and real radar observations will be presented. These experiments include assimilation of simulated observations from an idealized three-dimensional squall line, estimation of the environmental winds and sounding given radial velocity observations, assimilation of observations of zero reflectivity, and tests with real observations for the Arcadia supercell. Together, these experiments demonstrate the potential of the ensemble Kalman filter for convective-scale assimilation.
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