自然资源学报 ›› 2018, Vol. 33 ›› Issue (12): 2238-2248.doi: 10.31497/zrzyxb.20171244

• 资源评价 • 上一篇    

台风“杜鹃”降水δ18O的云雨区效应初探

许涛a, 蔡健榕a, 孙晓双a, 崔梦月a, 雷国良a, b, 姜修洋a, b, *   

  1. a. 福建师范大学 地理科学学院,湿润亚热带生态地理过程教育部重点实验室,福州 350007;
    b. 福建师范大学 地理研究所,福州 350007
  • 收稿日期:2017-11-23 修回日期:2018-02-06 出版日期:2018-12-20 发布日期:2018-12-20
  • 通讯作者: 姜修洋(1981- ),男,山东临沂人,教授,博士,主要从事全球变化与环境变迁研究。 E-mail: xyjiang@fjnu.edu.cn
  • 作者简介:许涛(1995- ),男,安徽颍上人,硕士研究生,主要从事自然地理学研究。E-mail: xutao_1995@126.com
  • 基金资助:
    国家自然科学基金(41672170); 福建省自然科学基金(2017J01654); 福建省高校杰出青年科研人才培育计划; 福建师范大学“大学生创新创业训练计划”(cxxl-2017195)

A Tentative Study of “Cloudy and Rainy Area Effect” of the δ18O in the Precipitation of Typhoon “Dujuan”

XU Taoa, CAI Jian-ronga, SUN Xiao-shuanga, CUI Meng-yuea, LEI Guo-lianga, b, JIANG Xiu-yanga, b   

  1. a. School of Geographical Sciences, Key Laboratory for Humid Subtropical Eco-geographical Process (Fujian Normal University), Ministry of Education, Fujian Normal University, Fuzhou 350007, China;
    b. Institute of Geography, Fujian Normal University, Fuzhou 350007, China
  • Received:2017-11-23 Revised:2018-02-06 Online:2018-12-20 Published:2018-12-20
  • Supported by:
    National Natural Science Foundation of China, No. 41672170; Natural Science Foundation of Fujian Province, No. 2017J01654; Training Program for Distinguished Young Scholar in Higher Education Institutions of Fujian Province; “The Undergraduate Innovation and Entrepreneurship Training Program” of Fujian Normal University, No. cxxl-2017195.

摘要: 我国东南地区台风降水显著,但对这种强降水事件中的稳定同位素研究较少,限制了对短时间极端降水稳定同位素变化过程和影响因素的认识。论文根据2015年9月28日至29日第21号台风“杜鹃”两次登陆(台湾宜兰、福建莆田)前后台北、福州两地气象数据和降水稳定同位素数据,分析了此次台风的降水稳定同位素变化特征及影响因素。台风期间,两地降水δ18O波动范围为-3.4‰~-15.0‰,变化幅度达11.6‰。台风前端和尾端两地降水同位素值相对偏正,平均值为-4‰~-6‰而台风中端两地降水同位素值极其偏负,平均值分别为-12.4‰和 -13.2‰。台风前端与尾端降水同位素值偏正,水汽受蒸发效应影响明显;而台风中端降水δ18O值极端偏负主要受“云雨区效应”的影响,即云雨区气流急剧上升,水汽在过饱和环境中快速凝结降落,受动力分馏作用小,降水δ18O极端偏负。结合降水δ18O变化特征、过量氘及模拟水汽轨迹,得到台风“杜鹃”降水主要的水汽来源为西太平洋海域。

关键词: 18O, 杜鹃”, 二次登陆, 降水δ, 台风“, 云雨区效应

Abstract: Typhoon precipitation is conspicuous in southeastern China, but little is known about the characteristics of the stable isotopes in these heavy rainfall events. It is thus highly needed to study the variation and controlling factors of the stable isotopes in extreme precipitation events. According to the meteorological data and stable isotope compositions of precipitation in Taipei and Fuzhou, the No. 21 Typhoon “Dujuan” led to landfall twice in Yilan County, Taiwan Province and Putian City, Fujian Province respectively, from September 28th to 29th, 2015. This paper analyzed the characteristic of stable isotopes in the precipitation of Typhoon “Dujuan” and the influence factors. During the period of Typhoon “Dujuan”, the δ18O varied from -3.4‰ to -15.0‰ with a fluctuation range of 11.6‰. The stable isotope compositions in the precipitation at the front and back in these two places are relative positive, and the average values vary from -4‰ to -6‰. The stable isotope composition of precipitation in the central area of these two places are most negative, and the average values are -12.4‰ and -13.2‰, respectively. The stable isotope compositions of front-end and back-end precipitation in two places are relative positive and the water vapor is obviously affected by “evaporation effect”. The stable isotope composition of middle-end precipitation is mainly influenced by “cloudy and rainy area effect”, which has the most negative values. In the sharp rise process of the airflow in cloudy and rainy area of Typhoon, water vapor rapidly condensed and fell in supersaturated environment, and the effect of kinetic fractionation is small, so the δ18O is most negative. Characteristics of δ18O, deuterium excess and simulated vapor transport trajectories suggest that the water vapor source of precipitation with Typhoon “Dujuan” is the western Pacific Ocean.

Key words: δ18O;, cloudy and rainy area effect, landfall twice, Typhoon “Dujuan”

中图分类号: 

  • P426.6