Abstract
The uses of a 4-dimensional variational system (4DVAR), that was currently tested in real-time operations, are discussed. The variational Doppler radar assimilation system (VDRAS) can be used to retrieve boundary-layer flows and temperature perturbations in urban areas from Doppler radar observations. The retrieved meteorological fields can then be used to drive a dispersion model. One of the limitations of the VDRAS system is the lack of surface and planetary boundary layer (PBL) physics. Methods are needed to increase the speed of the minimization algorithm, in order to make it more efficient to run the system with more grid points.
| Original language | English |
|---|---|
| Pages (from-to) | 341-343 |
| Number of pages | 3 |
| Journal | Bulletin of the American Meteorological Society |
| State | Published - 2004 |
| Event | Combined Preprints: 84th American Meteorological Society (AMS) Annual Meeting - Seattle, WA., United States Duration: Jan 11 2004 → Jan 15 2004 |