Li-Huan Hsu, Shih-Hao Su, Yu-Hsin Hsu, Wen-Wei Tseng, Jung-Lien Chu, Lee-Yaw Lin
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引用次数: 0
Abstract
This study investigates the climatological characteristics of remote rainfall in northeastern Taiwan during the cold half-year of 1980–2023. We identify critical factors driving heavy precipitation when tropical cyclones (TCs) are located south of Taiwan. Spatial analysis reveals distinct rainfall ‘hotspots’ that shift southward from Yilan depending on the TC's specific position. Statistical results indicate that heavy rainfall is primarily governed by extrinsic environmental thresholds, specifically moisture convergence and specific humidity. Validation using 2024–2025 cases confirm the robustness of these thresholds. We conclude that the interaction between background northeasterly flow and TC positioning acts as the dominant control. This relationship suggests that future climate-induced changes in TC tracks may displace established rainfall hotspots, potentially altering regional hydroclimatic risks.
期刊介绍：
Atmospheric Science Letters (ASL) is a wholly Open Access electronic journal. Its aim is to provide a fully peer reviewed publication route for new shorter contributions in the field of atmospheric and closely related sciences. Through its ability to publish shorter contributions more rapidly than conventional journals, ASL offers a framework that promotes new understanding and creates scientific debate - providing a platform for discussing scientific issues and techniques.
We encourage the presentation of multi-disciplinary work and contributions that utilise ideas and techniques from parallel areas. We particularly welcome contributions that maximise the visualisation capabilities offered by a purely on-line journal. ASL welcomes papers in the fields of: Dynamical meteorology; Ocean-atmosphere systems; Climate change, variability and impacts; New or improved observations from instrumentation; Hydrometeorology; Numerical weather prediction; Data assimilation and ensemble forecasting; Physical processes of the atmosphere; Land surface-atmosphere systems.
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