设为首页
加入收藏
广东近海台风路径异常的统计特征
Statistical Characteristics of Unusual Tropical Cyclone Tracks in Offshore Guangdong
-
摘要: 对1949~2000年的52年间在广东沿海近岸转折或沿海岸移动的热带气旋异常路径进行了统计分析，同时还研究了广东沿海的地形特征。结果发现，转折点 (或靠岸点) 主要集中在有明显山脉地形的区域，同时靠岸前热带气旋有移速减慢的特征。另外还发现，转折前强度越强，则转折点离岸越近；靠岸前平均移速越小，则转折角度越大；靠岸前强度越强，则其沿海岸移动所需入射角越小。Abstract: Statistical analyses are made on unusual tropical cyclone tracks with sudden changes of directions in offshore Guandong based on the data from Typhoon Almanac for the period of 1949 to 2000. Studies are also carried out on characteristics of intensity, moving speed, offshore distance, and turning points of typhoons with unusual tracks, as well as their relationships. Meanwhile, the impact of topography in the Guangdong coastal area on tropical cyclones is also studied. The results show that the locations where these tropical cyclones turned suddenly (or close to the coast) were concentrated in mountainous coastal areas, and tropical cyclones tend to slow down when they approach the coast. It is also shown that prior to turning, the more intense the tropical cyclones are, the closer the turning points are to the coast, and the smaller incident angle they need. In addition, near the coast, the slower the tropical cyclones move, the more markedly they turn.
-
Key words:
- Offshore Guangdong;
- Tropical cyclone;
- Unusual track;
-
表 1 离岸距离和转折角度分别与强度和移速的相关系数
表 2 平均离岸距离、入射角分别与强度和移速的相关系数
-
[1] 毛绍荣.目前台风路径预报中若干疑难问题探讨.广东气象, 1998, 3:2-3. http://www.cnki.com.cn/Article/CJFDTOTAL-GDCX199803000.htm [2] 毛绍荣.从9903号台风移动探讨台风登陆异常路径的条件.气象, 2000, 8:10-13. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXX200008003.htm [3] 罗哲贤, 陈联寿.台湾岛地形对台风移动路径的作用.大气科学, 1995, 19(6):701-706. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK506.007.htm [4] 孟智勇, 徐祥德, 陈联寿.台湾岛地形诱生次级环流系统对热带气旋异常运动的影响机制.大气科学, 1998, 22(2):156-168. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK802.003.htm [5] 秦曾灏, 端义宏.热带气旋强度变化研究的新进展.全国热带气旋科学讨论会论文集.北京:气象出版社, 2001, 25-30. [6] 梁必骐, 陈杰.近海加强的登陆台风统计分析.全国热带气旋科学讨论会论文集.北京:气象出版社, 2001, 180-185. -
下载:
图(8) / 表(2)
计量
- 摘要浏览量: 3985
- HTML全文浏览量: 710
- PDF下载量: 1693
- 被引次数: 0
