LONG-TERMVARIATION PATTERN AND FUTURE TREND OF PRECIPITATION IN THE VALLEYS OF SONGHUAJIANG AND LIAOHE RIVERS

Li Xiang; Li Weijing; Zhao Zhenguo

Vol.16, NO.5, 2005

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2005 > 16(5): 593-599

Li Xiang, Li Weijing, Zhao Zhenguo. Long-term variation pattern and future trend of precipitation in the valleys of Songhuajiang and Liaohe Rivers. J Appl Meteor Sci, 2005, 16(5): 593-599.

Citation:

Li Xiang, Li Weijing, Zhao Zhenguo. Long-term variation pattern and future trend of precipitation in the valleys of Songhuajiang and Liaohe Rivers. J Appl Meteor Sci, 2005, 16(5): 593-599.

Li Xiang, Li Weijing, Zhao Zhenguo. Long-term variation pattern and future trend of precipitation in the valleys of Songhuajiang and Liaohe Rivers. J Appl Meteor Sci, 2005, 16(5): 593-599.

Citation:

Li Xiang, Li Weijing, Zhao Zhenguo. Long-term variation pattern and future trend of precipitation in the valleys of Songhuajiang and Liaohe Rivers. J Appl Meteor Sci, 2005, 16(5): 593-599.

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LONG-TERMVARIATION PATTERN AND FUTURE TREND OF PRECIPITATION IN THE VALLEYS OF SONGHUAJIANG AND LIAOHE RIVERS

1.
Chinese Academy of Meteorological Sciences, Beijing100081
2.
National Climate Center, Beijing100081

Received Date: 2004-09-21
Rev Recd Date: 2005-03-09
Publish Date: 2005-10-31

Abstract

Abstract

Study on the precipitation variation features for the valley s of the Songhuajiang and Liaohe rivers is undertaken by means of a t rend analysis, power spectral method and wavelet transform in terms of the monthly and seasonal precipitation data from 1881 to 2002.Results indicate that a remarkable interdecadal variation is inherent in the precipitation of the target region, dominated by 27-30 (35-38)year periods for the rainfall in the Song hua jiang (Liaohe)valleys.Based on the evolution of the rainfall itself and auto-regression estimationitis inferred that the former (latter)w ill remain in a drier (a still longer rain-deficient)stage in 5-10 years to follow.
- Precipitation;
- Interdecadal variation;
- Wavelet analysis;
- Abrupt change in the mean

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References(10)

Figures and Tables

图 1 1951～2002年辽河流域长时间序列和短时间序列年降水距平百分率对比

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图 2 1951～2002年松花江流域(a)、辽河流域(b)年降水距平百分率变化曲线

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图 3 松花江流域1881～2000年年降水量功率谱

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图 4 1881～2000年松花江流域(a)和辽河流域(b)年降水量小波分析功率谱图

(阴影部分表示小波分析的功率谱数值≥2.0 mm²)

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图 5 1881～2000年松花江流域降水的Mexican hat小波变换

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