The Structure of a Subtropical Prefrontal Convective Rainband. Part I: Mesoscale Kinematic Structure Determined from Dual-Doppler Measurements
| Autor: | Robert W. Pasken, Hsiu-Wu Chang, Yeong-Jer Lin |
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| Rok vydání: | 1992 |
| Předmět: | |
| Zdroj: | Monthly Weather Review. 120:1816-1836 |
| ISSN: | 1520-0493 0027-0644 |
| DOI: | 10.1175/1520-0493(1992)120<1816:tsoasp>2.0.co;2 |
| Popis: | In Part I of this study, structural features of a convective rainband associated with the Mei-Yu front on 25 June 1987 over northwestern Taiwan are investigated. The dynamic and thermodynamic structures and momentum budgets of the convective rainband will be reported in Part II. Dual-Doppler data were collected from CP-4 and TOGA Doppler radars positioned along the northwest coast of Taiwan during the Taiwan Area Mesoscale Experiment (TAMEX). Fields of the system-relative wind and reflectivity were derived in a horizontal domain of 40 km × 36 km using the objective analysis scheme with a 1-km grid spacing in all three directions. There were ten analysis levels in the vertical ranging from 0.8 to 9.8 km. Vertical velocities were computed from the anelastic continuity equation by integrating downward with variational adjustment. Results show that the low-level jet (LLJ) in the boundary layer provides large vertical shear ahead of the cold front. The orientation of the jet is in the direction almost... |
| Databáze: | OpenAIRE |
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