气候变化研究进展 ›› 2018, Vol. 14 ›› Issue (3): 247-256.doi: 10.12006/j.issn.1673-1719.2017.210

• 气候系统变化 • 上一篇    下一篇

1961—2010年中国华南地区夏季降水结构变化分析

李慧1,2,周顺武1(),陆尔1,姜有山3,张运鹏4   

  1. 1 南京信息工程大学气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心/气候与环境变化国际合作联合实验室,南京 210044
    2 中国气象报社,北京 100081
    3 南京市气象局,南京 210009
    4 中国气象局国家卫星气象中心,北京 100081
  • 收稿日期:2017-10-11 修回日期:2017-10-31 出版日期:2018-05-31 发布日期:2018-06-07
  • 作者简介:李慧,女,博士,lihui100.com@163.com
  • 基金资助:
    公益性行业(气象)科研专项(重大专项)(GYHY201506001-1);国家自然科学基金项目(41565005);国家自然科学基金项目(41275095)

Changes in the structure of summertime precipitation in South China during 1961-2010

Hui LI1,2,Shun-Wu ZHOU1(),Er LU1,You-Shan JIANG3,Yun-Peng ZHANG4   

  1. 1 Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, China
    2 China Meteorological News Press, Beijing 100081, China
    3 Nanjing Meteorological Bureau, Nanjing 210009, China
    4 National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081,China
  • Received:2017-10-11 Revised:2017-10-31 Online:2018-05-31 Published:2018-06-07

摘要:

利用1961—2010年华南地区64个气象站的逐日降水资料,通过计算降水集中度指数Q,分析了华南夏季降水的结构。结果表明:夏季华南地区北部(南部)大部分地区降水集中度较小(大),表明该地区降水较为分散(集中)。在趋势变化上,近50年华南大部分地区夏季降水量和降水集中度都是增多的。北部和南部的降水量也均呈增加的趋势,北部增加更明显。另外,降水集中度在华南北部和南部也均呈增加的趋势,即降水呈现更集中的趋势,尤其是华南南部降水集中度增加更明显。此外,无论降水量为1 mm以上、25 mm以上还是50 mm以上的降水,持续1 d降水的雨日都在减少,而超过1 d的持续性降水过程都在增多。在空间分布上,华南大部分地区1 mm以上降水的雨日呈减少的趋势,而25 mm以上和50 mm以上的持续性降水过程呈增加的趋势。

关键词: 华南, 降水集中度, 持续性降水过程, 持续时间

Abstract:

In this paper, the changes in structure of summertime precipitation over South China (SC) were comprehensively analyzed using the concentration index (Q), based on 1961-2010 daily precipitation data collected at 64 rain gauge stations. The results indicate that the regions with smaller (larger) Q values were mostly located in the north (south) of SC, where daily precipitation events tended to become temporally dispersed (concentrated) during the study period. Variations of the Q and the total summertime rainfall amount during the period 1961-2010 in SC both exhibited an upward trend. The precipitation showed a more increase trend in north of SC than it in south of SC. However, the Q index showed a more increase trend in south of SC than it in north of SC. In SC, when the daily precipitation is greater than 1 mm, 25 mm and 50 mm, 1 d precipitation showed negative trends. In contrast, the precipitation events related to long wet spells increased. Over most parts of SC, the rainy days with precipitation amount greater than 1 mm tended to decrease whereas the wet spells with daily precipitation greater than 25 mm and 50 mm tended to increase.

Key words: South China, Precipitation concentration, Wet spells, Persistent time

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