A study of the relationship between low—Level jet and inversion layer over an agroforest ecosystem in east china plain |
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Authors: | Zhong Zhong Wang Hanjie |
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Institution: | Eco-Environmental Research Center in Atmospheric Boundary Layer P. O. Box 003, Nanjing 211101,Eco-Environmental Research Center in Atmospheric Boundary Layer P. O. Box 003, Nanjing 211101 |
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Abstract: | The relationship between the super–low–level jet (LLJ) and inversion layer over an agroforest ecosystem on the Huang–Huai–Hai
plain in the eastern China is studied by means of a time–independent K–closure model. It is found that the intensified inversion near the surface of a luxuriantly growing agroforest ecosystem
leads to the formation and development of the LLJ, the more intense the inversion, the stronger is the LLJ. The critical value
of inversion intensity index for the LLJ formation is 0.75°C/ 100 m, which relates to the necessary geostraphic wind velocity
of 6.0 to 10 m / s at the top level of the model. The numerical calculations show that the roughness length of the underlying
surface has considerable effects on the LLJ structure.
The project was supported by the National Natural Science Foundation of China (NSFC) (49975016). |
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Keywords: | Low-level jet Temperature inversion Agroforest ecosystem |
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