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Three-Dimensional Numerical Simulations of the Effects of a Cold Water Surface on the Evolution and Propagation of Thunderstorms

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【作者】 孔凡铀黄美元徐华英

【Author】 Kong Fanyou Huang Meiyuan Xu HuayingInstitute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029

【机构】 Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029Beijing 100029

【摘要】 <正> The influences of large areas of semi-unbounded cold water surface on the evolution, propagation and precipitation production of thunderstorms are simulated by using a fully elastic three-dimensional numerical hailstorm model. Real sounding profiles for temperature, humidity and wind are employed. The model has successfully simulated the significant modification of the propagation path of thunderstorms near the cold water area. The path change can be either’ along-bank’ or’ toward-bank’, depending on the position of the storm system relative to convergence zone of the water-land circulation. The simulations also show that thunderstorms developing or propagating within the convergence zone of local circulation will be intensified and produce much heavier hail, whereas those over cold water surface or the air that has been cooled by the water will be strongly inhibited.The influence of the cold water surface on thunderstorm characters is largely dependent upon the direction and intensity of the low-level

【Abstract】 The influences of large areas of semi-unbounded cold water surface on the evolution, propagation and precipitation production of thunderstorms are simulated by using a fully elastic three-dimensional numerical hailstorm model. Real sounding profiles for temperature, humidity and wind are employed. The model has successfully simulated the significant modification of the propagation path of thunderstorms near the cold water area. The path change can be either’ along-bank’ or’ toward-bank’, depending on the position of the storm system relative to convergence zone of the water-land circulation. The simulations also show that thunderstorms developing or propagating within the convergence zone of local circulation will be intensified and produce much heavier hail, whereas those over cold water surface or the air that has been cooled by the water will be strongly inhibited.The influence of the cold water surface on thunderstorm characters is largely dependent upon the direction and intensity of the low-level wind.

【基金】 This work is supported by LASG, IAP, Chinese Academy of Sciences.
  • 【文献出处】 Advances in Atmospheric Sciences ,大气科学进展(英文版) , 编辑部邮箱 ,1993年03期
  • 【被引频次】1
  • 【下载频次】20
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