对中国北方沙尘天气和气候的功率谱比较  

The comparison of the power spectral of the sand-dust weather and climate in Northern China

作　　者：刘国梁[1,2] 郝丽珍[3] 张峰[2] 

机构地区：[1]山西大学环境与资源学院,太原030006 [2]山西大学黄土高原研究所,太原030006 [3]太原大学计算机科学系,太原030009

出　　处：《干旱区资源与环境》2011年第12期89-91,共3页Journal of Arid Land Resources and Environment

摘　　要：通过对中国北方103个站1961-2000年的每月沙尘天气日数、月平均风速、月降雨量和月平均蒸发量等气象资料的功率谱分析,发现沙尘天气和气候的功率谱在1年和0.5年上有2个峰值;沙尘天气和风速在低频部分(周期大于2年)的谱上有个高值区;降雨量和蒸发量在低频区均没有高值区;40年中国北方沙尘天气的整体下降趋势与风速减小是同步的。In this paper we analyzed the power spectral of sand-dust weather,wind speed,precipitation,evaporation of 103 stations in Northern China from 1961 to 2000.It was found that there exited two peaks of 1 year and 0.5 years,in the power spectral of Sand-Dust weather data and the climate data.A higher value region in the lower frequency（i.e.the period longer than 2 years） of the power spectral was found in the sand-dust weather and the wind speed but not the precipitation or evaporation.The decreasing trend of sand dust weather was synchronous with the wind speed variation in Northern China for 40 years.

关 键 词：沙尘天气 气候资料 功率谱 

分 类 号：X513[环境科学与工程—环境工程] P4[天文地球—大气科学及气象学]