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2000•Chinese Journal of GeophysicsRequires access

Study on the Wind Profiles and Turbulent Characteristics in the Baroclinic Convective Boundary Layer

Mingyu Zhou, Fen-Lan QIAN, Shi‐Ming Li, Zhi Chen, Li-Rong SU

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Abstract

Abstract Based on the data of STORM‐FEST (STorm‐scale Operational and Research Meteorology‐Front Experiment System Test) carried out near the boundary between Kansas and Nebraska, U. S. in 1992, the vertical distributions of temperature, humidity and wind velocity in the baroclinic convective boundary layer were analysed. The results showed that the temperature and humidity were well mixed in the convective boundary layer. The wind velocity was also well mixed, but there existed wind shear sometime. Under conditions with and without wind shear the turbulent kinetic energy budget was calculated. Finally. The possible reasons of wind shear formation in the convective boundary layer were discussed.

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What this paper is about

Abstract Based on the data of STORM‐FEST (STorm‐scale Operational and Research Meteorology‐Front Experiment System Test) carried out near the boundary between Kansas and Nebraska, U. S. in 1992, the vertical distributions of temperature, humidity and wind velocity in the baroclinic convective boundary layer were analysed. The results showed that the temperature and humidity were well mixed in the convective boundary layer. The wind velocity was also well mixed, but there existed wind shear sometime. Under conditions with and without wind shear the turbulent kinetic energy budget was calculated. Finally. The possible reasons of wind shear formation in the convective boundary layer were discussed.

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Available abstract

Abstract Based on the data of STORM‐FEST (STorm‐scale Operational and Research Meteorology‐Front Experiment System Test) carried out near the boundary between Kansas and Nebraska, U. S. in 1992, the vertical distributions of temperature, humidity and wind velocity in the baroclinic convective boundary layer were analysed. The results showed that the temperature and humidity were well mixed in the convective boundary layer. The wind velocity was also well mixed, but there existed wind shear sometime. Under conditions with and without wind shear the turbulent kinetic energy budget was calculated. Finally. The possible reasons of wind shear formation in the convective boundary layer were discussed.

Key concepts: Baroclinity, Convective Boundary Layer, Wind shear, Boundary layer, Thermal wind, Meteorology, Turbulence kinetic energy, Planetary boundary layer

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