| 1960-2013年中国东南沿海地区年内降水集中度和集中期的时空变化特征 |
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| 引用本文： | 王米雪,延军平.1960-2013年中国东南沿海地区年内降水集中度和集中期的时空变化特征[J].水土保持通报,2016,36(2):277-282,287. |
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| 作者姓名： | 王米雪 延军平 |
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| 作者单位： | 陕西师范大学旅游与环境学院,陕西西安,710062 |
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| 基金项目： | 国家社会科学基金重点项目"西部重大灾害时空规律的统计研究"(14AZD094);国家社会科学基金项目"中国丝绸之路经济带生态文明建设评价与路径研究"(14XKS019) |
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| 摘 要： | 目的]揭示中国东南沿海地区降水集中度(PCD)和集中期(PCP)时空变化特征,为科学应对旱涝灾害和水资源利用等提供依据.方法]基于东南沿海地区46个气象台站的逐日降水量资料,采用Morlet小波分析、EOF等气候分析方法对1960-2013年东南沿海降水集中度和集中期时空变化特征进行分析.结果]在时间变化上,PCD波动幅度介于0.10～0.25,存在13～16 a,19～23 a和33～35 a的周期变化;PCP波动幅度介于139.5～208.2,存在13～16 a和25～30 a的周期变化.在空间变化上,PCD具有明显的地域分异特征,PCP空间差异性大.结论]1960-2013年中国东南沿海地区降水集中度在增强,且沿海地区值大于内陆地区;降水集中期稳定波动,空间上变化具有一致性.
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| 关 键 词： | 降水集中度(PCD) 降水集中期(PCP) 时空特征 东南沿海 |
| 收稿时间： | 2015/3/11 0:00:00 |
| 修稿时间： | 2015/3/25 0:00:00 |
Spatial-temporal Variation of Intra-annual Precipitation Concetration Degree and Precipitation Concetration Period on Southeast Coast of China from 1960 to 2013 |
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| WANG Mixue and YAN Junping.Spatial-temporal Variation of Intra-annual Precipitation Concetration Degree and Precipitation Concetration Period on Southeast Coast of China from 1960 to 2013[J].Bulletin of Soil and Water Conservation,2016,36(2):277-282,287. |
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| Authors: | WANG Mixue and YAN Junping |
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| Institution: | College of Tourism and Environment Science, Shaanxi Normal University, Xi''an, Shaanxi 710062, China and College of Tourism and Environment Science, Shaanxi Normal University, Xi''an, Shaanxi 710062, China |
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| Abstract: | Objective] The spatial-temporal variation characteristics of precipitation concentration degree(PCD) and precipitation concentration period(PCP) on the southeast coast of China were studied to provide bases for dealing with drought and flood disasters as well as water resources utilization scientifically. Methods] Based on daily precipitation data from 46 meteorological stations during 1960-2013 on the southeast coast of China, the authors investigated the characteristics of PCD and PCP using wavelet analysis and Empirical Orthogonal Function(EOF) methods. Results] Fluctuating range of PCD was between 0.10 and 0.25; PCD had three cycles: 13~16 a, 19~23 a and 33~35 a. PCP ranged between 139.5 and 208.2 and it had two cycles: 13~16 a and 25~30 a. An obvious characteristic of PCD was regional differentiation. Spatial variation of PCP was notable. Conclusion] During 1960-2013 in the southeast coast area of China, PCD increased, and the values of PCD of coastal areas were higher than those of inland areas. PCP fluctuated steadily. |
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| Keywords: | precipitation concentration degree(PCD) precipitation concentration period(PCP) spatial-temporal variation southeast coast of China |
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