1951—2014年西北太平洋双台风活动气候特征研究

doi:10.11867/j.issn.1001-8166.2017.06.0643

地球科学进展 ›› 2017, Vol. 32 ›› Issue (6): 643 -650. doi: 10.11867/j.issn.1001-8166.2017.06.0643

尹碧文 ^1, ^2, ³(

), 任福民 ^1, ^2, ^*(

), 李国平 ¹

1.成都信息工程大学大气科学学院,四川成都 610225
2.中国气象科学研究院灾害天气国家重点实验室,北京,100081
3.秦皇岛市气象局,河北秦皇岛 066000

收稿日期:2017-01-03 修回日期:2017-04-20 出版日期:2017-06-20
通讯作者: 任福民 E-mail:biwenyin@163.com;fmren@163.com
基金资助:
国家自然科学基金项目“双台风相互作用对中国极端降水的影响”(编号:41675042)和“我国东南沿海热带气旋极端降水的识别及其成因研究”(编号:41375056)资助

Climatic Characteristics of Binary Tropical Cyclones in the Northwest Pacific Ocean

Biwen Yin ^1, ^2, ³( ), Fumin Ren ^1, ^2, ^*( ), Guoping Li ¹

1.School of Atmospheric Sciences, Chengdu University of Information Technology,Chengdu 610225,China
2.State Key Laboratory of Severe Weather/Chinese Academy of Meteorological Sciences,Beijing 100081,China
3.Qinhuangdao Meteorological Office, Qinhuangdao Hebei 066000, China

Received:2017-01-03 Revised:2017-04-20 Online:2017-06-20 Published:2017-06-10
Contact: Fumin Ren E-mail:biwenyin@163.com;fmren@163.com
About author:
First author:Yin Biwen(1992-),female,Qitaihe City,Heilongjiang Province,Master student. Research areas include interactions of binary cyclones.E-mail:biwenyin@163.com
Supported by:
Project supported by the National Natural Science Foundation of China “Impacts of binary tropical cyclones on extreme precipitations over mainland of China”(No.41675042)and “Identifying tropical cyclone extreme rainfall and study on its causes over Southeast China”(No.41375056)

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利用台风最佳路径资料以及NCEP全球再分析资料,采用客观判定标准对1951—2014年西北太平洋2类双台风活动进行识别及气候特征分析,并对典型类双台风活动极值特征给出合适的解释。当2个台风之间距离d≤1 800 km时被定义为双台风活动;双台风活动又划分为典型类双台风和非典型类双台风。双台风活动的主要气候特征如下:1951—2014年西北太平洋一共出现699对双台风活动,其中典型类双台风和非典型类双台风分别为446对和253对,分别占到63.8%和36.2%;典型类双台风对比例随过程最短距离减小而增大,非典型类双台风对比例随过程最短距离减小而减小。典型类双台风过程相互靠近速度最大时刻,双台风对主要表现为东—西向分布,正好受副高南侧东风气流控制,有利于东台风快速靠近西台风;典型类双台风过程逆时针互旋角速度最大时刻,双台风对主要呈东北—西南或东北东—西南西向分布,并位于副高西侧和西南方主要受东南风为主控制,有利于双台风的逆时针互旋。

关键词: 西北太平洋, 双台风活动, 典型类, 非典型类, 气候特征

Based on typhoon best track data of China Meteorological Administration and NCEP global reanalysis data, this study analyzed the characteristics of binary tropical cyclones (TC) in the Northwest Pacific Ocean during 1951 to 2014 by using the objective determine standard. When the distance between the two TCs d≤ 1 800 km, they are defined as binary tropical cyclones or binary typhoons. And binary typhoons are divided into two different types which are typical binary typhoons and atypical binary typhoons. The climatic characteristics of binary tropical cyclones are as follows: There were 699 pairs of binary typhoons in Northwest Pacific Ocean during 1951 to 2014. In these cases, there were 446 pairs of typical binary typhoons and 253 pairs of atypical cases, occupying 63.8% and 36.2%, respectively. The proportion of typical cases increased with the shortest distance decreasing, while the proportion of atypical cases decreased with the shortest distance decreasing. When the speed of typical binary typhoons moving towards each other reached the peak, binary typhoons mainly showed the east to west direction. At this time, typhoons were controlled by easterly stream of the southern edge of the subtropical high. In this situation, the east typhoon moved toward the west typhoon quickly. When the anticlockwise angular velocity of typical binary typhoons reached the peak, binary cases distributed northeast to southwest or east-northeast to west-southwest, appearing in west and southwest edge of the subtropical high and mainly being controlled by southeasterly stream, thus benefiting the anticlockwise rotation between the typical binary typhoons.

Key words: Northwest Pacific Ocean, Activity of binary typhoons, Typical category, Atypical category, Climatic characteristics.

中图分类号:

P458

图1 1951—2014年西北太平洋双台风活动过程最短距离时刻2个台风位置及连线地理分布

Fig.1 The geographical distribution of locations and connections of two typhoons’ activity at the moment of the minimum distance in the Northwest Pacific Ocean during 1951-2014

图2 1951—2014年西北太平洋2类双台风对比例—过程最短距离分布

Fig.2 The distribution of two kindsof binary TC pair proportions-the minimum distance in the Northwest Pacific Ocean during 1951-2014

图3 1951—2014年西北太平洋2类双台风对频次年际变化

Fig.3 Annual variations of two kinds of binary TC pair frequencies in the Northwest Pacific Ocean during 1951-2014

图4 1951—2014年西北太平洋2类双台风对频次季节变化

Fig.4 Seasonal variations of two kinds of binary TC pair frequencies in the Northwest Pacific Ocean during 1951-2014

图5 双台风连线方向的划分示意图

Fig.5 Division of the direction for line between binary typhoons

图6 三参量极值情况下不同方向—双台风对频次占比分布

Fig.6 The distribution of frequencies’ proportions of paired binary typhoon under the different direction in case of extreme value of three parameters

图7 过程相互靠近速度最大时刻占比值前2位方向(合并为“东—西向”)的2个台风连线的中点位置、双台风平均位置和平均连线位置,及500 hPa上的588 gpm等高线^考虑到图中双台风对数量最多的月份为8月和9月,故500 hPa上的588 gpm等高线采用了8月(虚线)和9月(实线)1951—2014年平均高度场

Fig.7 Thecenter distribution of the two typhoon lines, the average position of the binary typhoons and the average connection position at the moment of the maximum-speeding procedural closing to each other in the top two direction (merged into“east-west”) and the location of 588 gpm contour line of 500 hPa^In consideration of the maximum amount of the month of paired binary typhoon is August and September, 588 gpm contour line of 500 hPa adopts annual mean height field in August and September during 1951-2014

图8 过程逆时针互旋角速度最大时刻占比值前2位方向(合并为“0°~45°方向”)的2个台风连线的中点位置、双台风平均位置和平均连线位置,及500 hPa上的588 gpm等高线^考虑到图中双台风对数量最多的月份为8月和9月,故500 hPa上的588 gpm等高线采用了8月(虚线)和9月(实线)1951—2014年平均高度场

Fig.8 Thecenter distribution of the two typhoon lines, the average position of the binary typhoons and the average connection position at the moment of the maximum-speeding counterclockwise spinning in the top two direction(merged into“0°~45°”) and the location of 588 gpm contour line of 500 hPa^In consideration of the maximum amount of the month of paired binary typhoon is August and September, 588 gpm contour line of 500 hPa adopts annual mean height field in August and September during 1951-2014

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