Impacts of coastal upwelling off east Vietnam on the regional winds system: An air-sea-land interaction

Zhe Wen Zheng, Quanan Zheng, Yi Chun Kuo, Ganesh Gopalakrishnan, Chia Ying Lee, Chung Ru Ho, Nan Jung Kuo, Shih Jen Huang

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    In this study, we analyze the influence of coastal upwelling off southeast Vietnam (CUEV) on local wind field using numerical simulations based on atmospheric model of Weather Research and Forecasting (WRF). Several scenarios are simulated by forcing identical model configurations with different SST fields. Based on simulation results, the relationship between CUEV and reduction of wind forcing is numerically evidenced. With the influence of a typical cold patch with a temperature drop of 3–5 °C, the local wind speeds can drop to less than 70% of original level. We find that the mechanism of response of the wind reduction to CUEV is enhancement of sea-breeze induced wind modulation. Onshore sea-breeze will enhance, while the contrast between land and sea is even more striking due to the contribution of a distinct coastal upwelling. This implies that air-sea-land interaction dominates the process of local wind system modulation in response to transient CUEV. This result sheds a new light on the air-sea interaction process within the SCS basin.

    Original languageEnglish
    Pages (from-to)105-115
    Number of pages11
    JournalDynamics of Atmospheres and Oceans
    Volume76
    DOIs
    Publication statusPublished - 2016 Dec 1

    Keywords

    • Air-sea-land interaction
    • Coastal upwelling
    • Sea-breeze
    • WRF model

    ASJC Scopus subject areas

    • Oceanography
    • Geology
    • Computers in Earth Sciences
    • Atmospheric Science

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