ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Application of Advanced Observation Operator of Doppler Radar Radial Velocity Assimilation in GRAPES_3Dvar
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
On the basis of GRAPES_3Dvar system, the insertion of preprocessed module and assimilation module for Doppler radar radial velocity assimilation are conducted (including traditional and advanced emulators respectively). In this paper, the rain case on 6 June 2014 is selected to perform the assimilation and prediction experiments using the GRAPES_3Dvar system after the accuracy test, analyzing the impact on the adjustment of initial conditions and precipitation simulations through different emulators. The results indicate that the mesoscale information increases after assimilating radar radial velocity. Moreover, by comprehensively analyzing the radial and tangential components, the results using the advanced emulator approach are closer to observation and reference wind fields compared with those using the traditional one. In addition, the accumulated precipitation result adopting the advanced emulator can better simulate the location and magnitude of precipitation and effectively restrain the virtual rainfall among all tests, the test scores also illustrate this conclusion.
Keywords:
Project Supported:
Clc Number:
Mobile website
