南京大学学报(自然科学版) ›› 2024, Vol. 60 ›› Issue (2): 218229.doi: 10.13232/j.cnki.jnju.2024.02.004
• • 上一篇
摘要:
台风尺度表征了台风低层风场特定风速半径大小,是台风灾害影响范围的重要度量.针对超强台风“舒力基”(2021),对其尺度可预报性进行初步探讨.结果表明,模式可以模拟出台风发展初期台风尺度(内核尺度RMW、外围尺度R17)的演变趋势.基于集合预报的模拟试验,具体分析了内核尺度RMW、外围尺度R17演变及其误差增长特征.台风预报总体误差主要出现在对流层下层850 hPa,距离台风中心50~150 km.从初始环境场看,初始相对湿度是影响台风尺度误差增长的重要因子,初始高湿环境有利于台风发展阶段的台风尺度高离散度,从而限制了台风尺度的可预报性.在一定程度上,外围风圈半径的可预报性要高于内核风圈半径.
中图分类号:
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