黄土高原沙尘暴持续时间LH现象分析  

Analysis on the dust storm LH phenomenon in Loess Plateau

作　　者：郝丽珍[1] 刘国梁[2] 

机构地区：[1]太原学院计算机工程系,太原030032 [2]山西大学环境与资源学院,太原030006

出　　处：《干旱区资源与环境》2015年第1期145-148,共4页Journal of Arid Land Resources and Environment

摘　　要：持续时间大于t的沙尘暴次数N满足lgN=a-bt(即LH现象)。文中分析了黄土高原四季沙尘暴持续时间。平均持续时间:春季126.5分钟,冬季113分钟,秋季95分钟,夏季51.9分钟;春季、秋季和冬季满足LH现象,拟合的b值:春季0.1634 hr-1,秋季0.2043 hr-1,冬季0.1707 hr-1。夏季例外,但在t≤8hr也满足LH现象,拟合的b值为0.2639 hr-1。The number of dust storms（ N） with the duration greater than t,is obeyed by lgN = a- bt,i. e.,LH phenomenon. The dust storm durations in Loess Plateau were analyzed. The mean duration of dust storm was126. 5 min for spring,51. 9 min for summer,95. 9 min for autumn and 113. 6 min for winter,respectively. The duration distribution of dust storm for spring,autumn and winter obeyed the LH phenomenon and with b value of0. 1634 hr- 1,0.2043 hr- 1,0.1707 hr- 1,respectively. For summer,the duration distribution of dust storm was different from the LH phenomenon,but while t ≤ 8h the duration distribution obeyed LH phenomenon and with b value of 0. 2639 hr- 1.

关 键 词：黄土高原 沙尘暴 持续时间 分布 B值 

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]