中国历史时期尘暴波动的分析  

ANALYSIS ON FLUCTUATIONS OF DUST STORMS IN THE HISTORIC TIMES OF CHINA

作　　者：刘多森[1] 汪枞生[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008

出　　处：《土壤学报》2006年第4期549-553,共5页Acta Pedologica Sinica

摘　　要：据正史记载，300-1909A．D．期间，中国共发生尘暴436次，尘暴日数达901日。每10年中尘暴的次数t与日数d之乘积斑值，可作为表达不同时段尘暴频发程度的指标，也可视为表达土壤环境干旱化强度的指标。330年的尘暴频发时段有：480-509，1170-1219，1690-1729，1840-1879A．D．，在这些时段内的斑值都大于等于25。尘暴频发时段对应于历史时期的寒冷时段。冷干期有利于尘暴发生。在所研究的1610年内，每年降尘的平均厚度约为0．54cm。黄土的风成过程目前仍在进行。According to the official history, during the period from 300 to 1909 A.D., China witnessed a total of 436 dust storms, which lasted a total of 901 days. The product td （ t, the number of dust storms in every ten years, d, the days the dust storms lasted）, may be used as an index of frequency of dust storms in different periods, and may also be regarded as an index of aRidification degree of soil environment. Dust storm frequent periods, ≥ 30 years, were distributed in 480 - 509, 1170 - 1219, 1690 - 1729 and 1840 - 1879 A.D. These periods with td values ≥25 corresponded to the cold periods in the history. Cold and dry periods are prone to triggering dust storms. During the 1 610 years studied, the average dust fall for every year is about 0.54 cm. Aeolian process of the loess is still going on nowadays.

关 键 词：尘暴 历史时期 干旱化 温度 

分 类 号：P425.55[天文地球—大气科学及气象学]