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

Wan-Ru Huang, Shih Yu Wang

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    20 Citations (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)1951-1963
    Number of pages13
    JournalClimate Dynamics
    Volume43
    Issue number7-8
    DOIs
    Publication statusPublished - 2013 Jan 1

    Keywords

    • Circulation change
    • Diurnal rainfall
    • Land–sea breeze
    • Low-level jet

    ASJC Scopus subject areas

    • Atmospheric Science

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