2017年总计27个台风在西北太平洋和南海生成,其中8个在我国沿海登陆。台风生成时间集中于7-8月,生成源地较多年平均偏西5°,南海台风数（8个）较多年平均（4.7个）明显偏多,台风登陆点集中在广东沿海,气旋峰值强度（30.9 m·s~（-1））较多年平均（40.3 m·s~（-1））明显偏弱,登陆台风的平均登陆强度（29.0 m·s~（-1））较多年平均（32.8 m·s~（-1））偏弱。台风雨水情呈现降雨范围广、暴雨强度大,主要江河平稳、部分中小河流超警戒水位的特征。使用实时业务定位、定强及降水、大风、水文观测数据,针对2017年影响我国的10个台风个例的气象水文特征及社会经济影响做出详细分析。＂天鸽＂为2017年登陆中国最强的台风,导致灾损最为严重,其与＂帕卡＂在4 d内先后登陆经济发达、人口密集的珠三角地区,造成损失叠加。
A total of 27 typhoons were generated over western North Pacific and the South China Sea in2017,of which 8 landed on the coast of China. The typhoons were generated mainly in July and August,whose origins were 5° to the west of previous average longitude. The number of typhoons generated over the South China Sea（ 8） was significantly higher than the annual average（ 4. 7）. The landing sites of these typhoons were concentrated on the coast of Guangdong. The cyclone peak intensity（ 30. 9 m·s~（-1））was obviously weaker than the annual average（ 40. 3 m·s~（-1））,and the average landing intensity（ 29. 0 m· s~（-1）） was also weaker than the annual average（ 32. 8 m · s~（-1））. The typhoon rainwater was characterized by widespread rainfall area and enhanced heavy rain intensity,and major rivers＇ water levels were stable with several small and medium-sized rivers exceeding the warning level. Based on real-time operational track and intensity,precipitation and wind observations,combined with the hydrological observations,a detailed analysis was conducted of the meteorological and hydrological characteristics and socio-economic impacts of the 10 typhoon cases affecting China in 2017. HATO was the strongest typhoon that hit China in 2017,and it claimed the most affected population,deaths,missing persons and direct economic losses. It hit the economically developed and densely populated Pearl River Delta regionfollowed by PAKHAR within 4 days,resulting in a doubled loss.
Journal of Marine Meteorology
characteristics of activities