ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 42 Issue 8 > 2016,42(8):987-995. DOI:10.7519/j.issn.1000-0526.2016.08.009 Prev Next
Retrieving Vertical Divergence and Temperature Advection Profiles from Doppler Weather Radar Data
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
Divergence and temperature advection can be used to infer the atmospheric vertical movement situation and the stability of atmospheric stratification respectively, which is helpful to deduce the precipitation evolution trend. Considering there is no vertical divergence profile and vertical temperature advection profile products of China new generation weather radar, this paper proposes the retrieval algorithms of vertical divergence and temperature advection profiles from Doppler weather radar data. First, the vertical wind profile and vertical divergence profile above the radar station are retrieved using layered VVP method from radar radial velocity data， and then under the assumption that the atmosphere were in the geostrophic balance in middle latitude and based on the relationship between the temperature advection and geostrophic wind changing with height, the vertical temperature advection profile is retrieved from the vertical wind profile. Taking two severe precipitation processes as examples, the retrieved vertical wind profile, vertical divergence profile and vertical temperature advection profile are analyzed. The results show that the vertical wind profile and vertical divergence profile can be retrieved reasonably using layered VVP in the case of largescale precipitation around radar. In this case, the retrieved winds represent average winds within the valid detection range of radar, which meets approximately the geostrophic equilibrium condition, so the vertical temperature advection profile can be retrieved reasonably from the vertical wind profile. The synoptic principles and the observation data can be used to explain the reliability of the retrieval results.
Keywords:
Project Supported:
Clc Number:
Mobile website
