Graphical Abstract

Hsieh, M.-K., Y.-W. Chen, Y.-C. Chen, and C.-M. Wu, 2022: The roles of local circulation and boundary layer development in tracer transport over complex topography in central Taiwan. J. Meteor. Soc. Japan, 100, 555-573.
https://doi.org/10.2151/jmsj.2022-028
Graphical Abstract Published

 

Plain Language Summary: The PM2.5 concentration tends to be high in central Taiwan under northeasterly monsoon. We examine the essential pollutant transport and accumulation mechanism in central Taiwan by conducting high-resolution idealized tracer transport TaiwanVVM simulations. We conclude that the lee vortex, which is induced by the blocking effect of the Central Mountain Range of Taiwan to the northeasterly monsoon, controls the tracer transport in the plain areas of central Taiwan. Once the pollutant is transported to the mountain areas, the diurnal variation of the boundary layer development over complex topography could further decide the nighttime local pollutant concentration in the Puli basin.  

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