ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 44 Issue 10 > 2018,44(10):1325-1331. DOI:10.7519/j.issn.1000-0526.2018.10.009 Prev Next
Analysis on Mechanisms of Freezing Rain in Guizhou Province Using CloudSat Data
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The observation data of satellite CloudSat are used to analyze the mechanisms of freezing rain in Guizhou Province. The results show that, for the freezing rain under icephased mechanism, reflectivity of cloud profile radar, ice water content and temperature profile of CloudSat data could describe the process of icephased particles melting into liquid clearly. Bright bands of reflectivity at the 0℃ layer of cloud profile radar are the direct reflection of the melting process, and ice water content data could represent the melting process in melting layer as well. For the freezing rain under the supercooled warm rain mechanism, CloudSat data could depict the falling process of precipitation particles kept in the supercooled liquid in environment of temperature below 0℃ vertically. This research proves that the Guizhou freezing rain has warm rain mechanism with melting layer based on observation of cloudphysics. With the existence of temperature inversion in vertical temperature profile, precipitation particles exist in the liquid state in melting layer but remain supercooled in environment of temperature below 0℃. The supercooled liquid precipitation particles could be heated when falling into melting layer, getting frosted into supercooled droplets in freezing layer below, colliding with surface objects and forming freezing rain with temperature below 0℃ at last. Thus, melting layer could not be used to distinguish the formation mechanism of freezing rain.
Keywords:
Project Supported:
Clc Number:
Mobile website
