Climate Dynamics

, Volume 43, Issue 7, pp 1951–1963

Impact of land–sea breezes at different scales on the diurnal rainfall in Taiwan

Authors

    • Department of Earth SciencesNational Taiwan Normal University
  • Shih-Yu Wang
    • Utah Climate CenterUtah State University
    • Department of Plants, Soils, and ClimateUtah State University
Article

DOI: 10.1007/s00382-013-2018-z

Cite this article as:
Huang, W. & Wang, S. Clim Dyn (2014) 43: 1951. doi:10.1007/s00382-013-2018-z

Abstract

The formation mechanism of diurnal rainfall in Taiwan is commonly recognized as a result of local forcings involving solar thermal heating and island-scale land–sea breeze (LSB) interacting with orography. This study found that the diurnal variation of the large-scale circulation over the East Asia-Western North Pacific (EAWNP) modulates considerably the diurnal rainfall in Taiwan. It is shown that the interaction between the two LSB systems—the island-scale LSB and the large-scale LSB over EAWNP—facilitates the formation of the early morning rainfall in western Taiwan, afternoon rainfall in central Taiwan, and nighttime rainfall in eastern Taiwan. Moreover, the post-1998 strengthening of a shallow, low-level southerly wind belt along the coast of Southeast China appears to intensify the diurnal rainfall activity in Taiwan. These findings reveal the role of the large-scale LSB and its long-term variation in the modulation of local diurnal rainfall.

Keywords

Diurnal rainfallLand–sea breezeCirculation changeLow-level jet

Copyright information

© Springer-Verlag Berlin Heidelberg 2013