Science Source

Changes in precipitation frequency and intensity in the vicinity of Taiwan: typhoon versus non-typhoon events

Uses the hourly rainfall at 21 ground stations in Taiwan to investigate changes in the frequency, intensity, and duration of rainfall, which can be divided into typhoon and non-typhoon rainfall, in the period of 1970–2010
Finds that the frequency of rainfall shows a decreasing trend for lighter rain and an increasing trend for heavier rain
Finds that the typhoon rainfall shows a significant increase for all intensities, while the non-typhoon rainfall exhibits a general trend of decreasing, particularly for lighter rain
Finds that in rainfall intensity, both typhoon and non-typhoon rainfall extremes become more intense, with an increased rate much greater than the Clausius–Clapeyron thermal scaling
Results show that rainfall extremes associated with typhoons have tended to affect Taiwan rainfall for longer in recent decades
Results show that the more frequent, intense and long-lasting typhoon rainfall is mainly induced by the slower translation speed of the typhoons over the neighborhood of Taiwan