ZENG Yan,WANG Wei,HU Jiajie.Evolution Characteristics Analysis of Typhoon Mangkhut(1822)[J].Journal of Chengdu University of Information Technology,2021,36(01):86-94.[doi:10.16836/j.cnki.jcuit.2021.01.014]
1822号台风“山竹”演变特征分析
- Title:
- Evolution Characteristics Analysis of Typhoon Mangkhut(1822)
- 文章编号:
- 2096-1618(2021)01-0086-09
- Keywords:
- meteorology; weather analysis; “Mangkhut”typhoon; evolution characteristic; transport of water vapor; SST
- 分类号:
- P458.1+24
- 文献标志码:
- A
- 摘要:
- 为了解2018年第22号台风“山竹”的环流等特征,利用日本气象厅热带气旋最佳路径数据集、中国气象局提供的测站降水资料和欧洲气象中心环流、海温数据,对其路径、强度变化、海温背景、环流特征、水汽输送特征以及动热力物理量场进行分析。结果表明:“山竹”生成后先西行,后转为西北行并依次登陆菲律宾、广东台山市海晏镇; 台风发展演变过程中,中心气压和中心最大风速变化呈负相关。“山竹”移动路径主要受西太平洋副热带高压(简称副高)南侧偏东气流影响; 台风发展至强盛过程中,环境风垂直切变跳跃式变低,最低值可达1.51762 m/s,有利于维持“山竹”的暖心结构,促使其强度一直维持较高数值; 下垫面较高海温的维持也为“山竹”的强盛发展提供了有力支撑。“山竹”在海晏镇登陆前后形成强降水过程,其水汽主要来自孟加拉湾和南海; 同时台风中心附近有很强的辐合上升运动,广东地区上空的上升区与广西西部和台湾南部海域上空的下沉区构成垂直环流圈,充足的水汽供应和强烈的辐合抬升运动,致使台风登陆前后暴雨持续发生。
- Abstract:
- In order to understand the circulation and other characteristics of Typhoon No. 22 in 2018, the best path of tropical cyclone dataset by the Japan Meteorological Agency, the precipitation data provided by the China Meteorological Administration and the circulation, sea surface temperature data of the European Meteorological Center were used to analyze the characteristics of “Mangkhut”, such as the path, intensity changes, SST background, circulation and water vapor transport characteristics, and dynamic and thermodynamic physical fields. The results show that: “Mangkhut” first traveled westward, then turned northwestward and landed in the Philippines and Haiyan Town. During the typhoon’s development and evolution, the central pressure and the central maximum wind speed were negatively correlated.The movement path of “Mangkhut” is mainly affected by the steering flow of the western Pacific subtropical high. When the typhoon develops to its strength, the vertical shear of the environmental wind becomes lower by leaps and bounds, the lowest value can reach 1.51762 m/s, which is beneficial to maintain the warmth of “Mangkhut”. The core structure promotes its strength to maintain a relatively high value. Themaintenance of high SST of the underlying surface also provides strong support for the strong development of “Mangkhut”.Before and after the landing in Haiyan Town of “Mangkhut”, there is a strong convergence upward movement near the center of the typhoon, and the water vapor of “Mangkhut” mainly comes from the Bay of Bengal and the South China Sea. This strong convergence upward movement in the typhoon center and the downward movement over the western Guangxi and southern Taiwan constitute a vertical circulation circle. Sufficient water vapor supply and strong convergence and uplift movement result in continuous heavy rains before and after the typhoon landfall in Haiyan town.
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备注/Memo
收稿日期:2019-11-22
基金项目:国家自然科学基金资助项目(41005034); 公益性行业(气象)科研专项资助项目(GYHY201506001)