| 1961—2010年中国华南地区夏季降水结构变化分析 |
| |
| 引用本文： | 李慧,周顺武,陆尔,姜有山,张运鹏.1961—2010年中国华南地区夏季降水结构变化分析[J].气候变化研究进展,2018,14(3):247-256. |
| |
| 作者姓名： | 李慧 周顺武 陆尔 姜有山 张运鹏 |
| |
| 作者单位： | 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 2100442 中国气象报社,北京 1000813 南京市气象局,南京 2100094 中国气象局国家卫星气象中心,北京 100081 |
| |
| 基金项目： | 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) |
| |
| 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 |
| 收稿时间： | 2017-10-11 |
| 修稿时间： | 2017-10-31 |
Changes in the structure of summertime precipitation in South China during 1961-2010 |
| |
| Hui LI,Shun-Wu ZHOU,Er LU,You-Shan JIANG,Yun-Peng ZHANG.Changes in the structure of summertime precipitation in South China during 1961-2010[J].Advances in Climate Change,2018,14(3):247-256. |
| |
| Authors: | Hui LI Shun-Wu ZHOU Er LU You-Shan JIANG Yun-Peng ZHANG |
| |
| 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. |
| |
| Keywords: | South China Precipitation concentration Wet spells Persistent time |
|
| 点击此处可从《气候变化研究进展》浏览原始摘要信息 |
| 点击此处可从《气候变化研究进展》下载免费的PDF全文 |
|
