基于Morlet小波的太阳活动与黄河输沙量关系分析

Relationship between Solar Activities and Sediment in the Yellow River Basin Based on Morlet Wavelet

太阳活动可能影响地球气候,直接或间接的对流域径流和输沙产生一定的影响。利用Morlet小波分析技术,对1919-2007年黄河龙门站输沙量与同期太阳黑子相对数的变化进行了对比分析,结果表明:黄河龙门站输沙量与太阳黑子活动在不同时间段表现出不同的相关关系。在相同的9a时间尺度上,1919-1950年龙门输沙量与太阳黑子小波系数呈一定的负相关;在1951-2007年期内则表现为正相关。由此可见,太阳活动对黄河输沙量的影响机制十分复杂。

Solar activity may affect the Earth＇s climate,directly or indirectly to the watershed runoff and sediment transport have a certain impact. The Morlet wavelet method has applied to analyze the changes of sediment at Longmen station and sunspot relative number from 1919 to 2007. The results show that there are different correlations between the Yellow River sediment and sunspot activity in different time periods. In same 9 year scale,there are negative correlations during 1919-1950,while there is positive correlation during 1951-2007. This indicates that the solar activity on the impact of the Yellow River sediment is very complicated.