| 中国降水年内分配的时空演变特征之新法研究 |
| |
| 引用本文： | 李少娟,钱永甫.中国降水年内分配的时空演变特征之新法研究[J].南京气象学院学报,2006,29(3):314-321. |
| |
| 作者姓名： | 李少娟 钱永甫 |
| |
| 作者单位： | 南京大学,大气科学系,江苏,南京,210093;南京大学,灾害性天气气候研究室,江苏,南京,210093 |
| |
| 基金项目： | 中国科学院资助项目;科技部科研项目 |
| |
| 摘 要： | 利用中国160站50a月降水资料，分别用降水量序列法、降水量方差法及降水量离差法定量计算了全年降水的聚集程度（聚集度）和最大降水对应的聚集时间（聚集期），并利用计算出的聚集度和聚集期分析了中国降水年内时空变化的气候特征，验证并比较了3种新方法的合理性；挑选长江中下游作为关键区，对该区的聚集度进行了区域平均的趋势分析和小波分析，结果发现，该区的降水聚集度具有明显的年际变化，而年代际变化则表现得比较稳定。
|
| 关 键 词： | 降水聚集度 降水聚集期 长江中下游 小波分析 年际与年代际变化 |
| 文章编号： | 1000-2022（2006）03-0314-08 |
| 收稿时间： | 04 16 2004 12:00AM |
| 修稿时间： | 2004-04-162004-08-29 |
New Methods to Research the General Features of Precipitation in China |
| |
| LI Shao-juan,QIAN Yong-fu.New Methods to Research the General Features of Precipitation in China[J].Journal of Nanjing Institute of Meteorology,2006,29(3):314-321. |
| |
| Authors: | LI Shao-juan QIAN Yong-fu |
| |
| Institution: | 1. Department of Atmospheric Sciences;2. Institute of Severe Weather and Climate, Nanjing University,Nanjing 210093,China |
| |
| Abstract: | The data used in this study are taken from the monthly precipitation dataset at 160 stations in China during 1951 to 2000.The precipitation-concentration degree(PCD) and precipitation-concentration period(PCP) of annual precipitation are quantitatively defined by the so-called serial,variance,and departure methods respectively.According to the temporal variation of annual precipitation(AP),the seasonal cycle of the AP can be described more accurately with the help of the two parameters(PCD and PCP).Relationships of the spatial and temporal distribution patterns of PCD and PCP with the annual precipitation in China are further investigated.The computed results by using the three methods are compared with each other.Based on the correlation coefficients between precipitation anomalies of different stations in the mid-and low-reaches of the Changjiang River,the representative stations of this region are selected.The PCD and PCP at selected stations are summed up and then the time series of the regionally averaged PCD and PCP are computed,and further studied using the wavelet and trend analysis.Results show that the two parameters,PCD and PCP,both exhibit prominent interannual and interdecadal variations in this area,with the latter to be more stable in recent 50 years. |
| |
| Keywords: | precipitation-concentration degree precipitation-concentration period mid-lower reaches of the Changjiang River Morlet wavelet analysis interannual and interdecadal variations |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
