Characteristics of Wind and Wave Changes During Cold Air Processes in the Jieyang Sea Area of Guangdong from 2023 to 2024
XIA Yun
CHEN Jing
TIAN Shenglin
HUANG Fengru
CHEN Yuqiang
HUANG Yujiao
LIN Qiaomei
Abstract：To enhance the understanding of the variation patterns of cold air-induced waves in the Jie-yang sea area and improve the forecasting,early warning,and disaster prevention capabilities of professional meteorological services,measured data from wave and anemometer instruments on offshore wind power plat-forms in Jieyang,Guangdong,along with supplementary data,were used to summarize and analyze cold air-induced waves in the Jieyang sea area from autumn 2023 to spring 2024.The results are shown as follows.During this period,55 cold air-induced wave events occurred due to southward cold air,with 34 of them reaching or exceeding the standard for high waves.The significant increase in wave height lagged behind the significant increase in wind speed,with an average delay of 4.5 hours.The wave period generally remained stable at around 7 seconds.After the cold air subsided,the swell energy was mostly dissipated,and the wave height decreased to light wave conditions,accompanied by a sudden drop in wave period.If new cold air arrived later,the wave period would increase rapidly.When the Jieyang sea area was affected by easterly cold air and the wind speed measured by lidar reached level 6 or higher on the Beaufort scale,cold air-in-duced waves with significant wave heights of 3 meters or more were likely to occur.
Keywords：synopticscold airwindwavesJieyangGuangdong
Publication Date：2025-04-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 63-66 )