Relationship Between Different Types of ENSO Events and East Asian Winter Near-surface Wind Speed Variability Revealed by Reanalyses and CMIP6 Models
编号:117 访问权限:仅限参会人 更新:2025-11-06 11:06:17 浏览:9次 张贴报告

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摘要
Near-surface wind speed (NSWS) plays a crucial role in influencing East Asian natural environment, yet its interannual variability remain unclear. This study investigates the relationship between different types of El Niño–Southern Oscillation (ENSO) events and East Asian NSWS variability during the boreal winter, using multiple reanalysis datasets and CMIP6 outputs. The results indicate that ENSO events can exert significant impacts on East Asian NSWS by regulating atmospheric circulation over the Western Pacific. During El Niño years, high-pressure anomalies occur over the western Pacific, weakening sea level pressure gradient along the East Asian coastal regions, leading to decreased NSWS. By comparison, the EP-type El Niño produce more widespread high-pressure anomalies over the oceans than the CP-type El Niño, resulting in a stronger and more extensive reduction in NSWS. Conversely, multi-year La Niña tend to induce low-pressure anomalies over broader areas over the Western Pacific compared to single-year La Niña, intensifying the surface pressure gradient along East Asian coasts. Consequently, multi-year La Niña strengthen NSWS across the entire East Asian coastal regions and the offshore seas, whereas single-year La Niña primarily enhance NSWS over the adjacent oceans. Although CMIP6 models successfully reproduce ENSO-related NSWS anomalies over the South China Sea and southern China, they fail to simulate NSWS anomalies at higher latitudes and in inland regions of China. This discrepancy is primarily attributed to models' inability to accurately capture the locations of high-pressure anomalies over the Western Pacific.
关键词
Near surface wind speed, Winter, ENSO events, East Asian
报告人
Wentian Qiu
Master Degree Candid Sun Yet-Sen University

稿件作者
Wentian Qiu Sun Yet-Sen University
Kaiqiang Deng Sun Yet-Sen University
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重要日期
  • 会议日期

    11月20日

    2025

    11月24日

    2025

  • 11月10日 2025

    初稿截稿日期

  • 11月24日 2025

    注册截止日期

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太平洋科学协会
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Shantou University
Xiamen University
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