摘要
对超强台风“利奇马”期间西北太平洋海表面高度异常(SLA)特征及台风移动路径附近中尺度冷涡特征进行了分析,结果表明:“利奇马”过境前后,西北太平洋SLA以正值为主,闭合SLA负值区C1负异常数值减小、范围扩大,C2变化不明显;“利奇马”以6.4~10.8 km/h移速横穿中尺度冷涡CE1,并向西北方向移动,移出前后CE1强度、范围加强(SLA极值为-19.6 cm);以13.9~20.4 km/h快速从CE2以东海域移过,过境前后CE2强度、范围变化不明显;CE1、CE2位于“利奇马”强迫区域内,“利奇马”对CE1影响时间长(18~42 h),使得CE1范围增大、强度增强,对CE2影响则不明显。
The characteristics of sea level anomaly(SLA)in the Northwest Pacific Ocean and mesoscale oceanic cold eddy near the typhoon path during Super Typhoon“Lekima”were analyzed.The results show that:(1)The SLA was mainly positive in the Northwest Pacific Ocean during“Lekima”,the value of negative SLA closed area C1 decreased and the scope expanded,the change of negative SLA closed area C2 was not obvious.(2)“Lekima”traversed mesoscale cold eddy CE1 at the speed of 6.4-10.8 km/h,the intensity and scope of CE1 were strengthened during and after the displacement,the maximum SLA was-19.6 cm.It quickly moved near the east of CE2 at the speed of 13.9-20.4 km/h,the intensity and scope of CE2 didn’t change significantly.(3)CE1 and CE2 were both located in the forcing region of“Lekima”,it had long influence on CE1 about 18-42 hours which increased the intensity and scope of CE1,but had no obvious effect on CE2.
作者
夏天竹
卜盛田
李肖霞
于润玲
胡潮
XIA Tianzhu;BU Shengtian;LI Xiaoxia;YU Runling;HU Chao(Tianjin Binhai New Area Meteorological Bureau,Tianjin 300450,China;Meteorological Observation Center of CMA,Beijing 100081,China;Shanghai Typhoon Institute,China Meteorological Administration,Shanghai 200030,China;Tianjin Yigang Logistics Technology Service Co.,Ltd.,Tianjin 300452,China)
出处
《天津科技》
2023年第S01期99-102,107,共5页
Tianjin Science & Technology
基金
上海台风研究基金项目“海洋观测要素对台风响应的特征研究”(TFJJ202008)
国家重点研发计划子课题“海洋机动环境下多波段云雾协同观测关键技术研究”(2021YFC3090201)。
关键词
中尺度冷涡
“
利奇马”
海表面高度异常
强迫时间
特征分析
mesoscale cold eddy
Super Typhoon Lekima
sea level anomaly
forcing time
characteristics analysis
