论沙尘暴与冰后期古气候进程的关系

On Relation between Sand-dust Storm and Ancient Weather Course in Post-glacial

关于沙尘暴的成因，学界大多认为其是近期以来人为破坏荒漠植被的结果。通过分析第四纪黄土生成历史，以及古文献中的大量关于“雨土”的记录，可以发现其实沙尘暴古已有之，古代沙尘暴活动剧烈程度较今日有过之而无不及。事实上，黄土堆积即沙尘暴的直接产物，“雨土”是其过程和现象。第四纪冰期结束以来的全新世期间，存在着以2500-3000年为周期的冷暖干湿变化周期。目前，地球已经历了大约2500年的亚大西洋期行将结束，新的灾变时期即将来临。因此，从地球总的气候发展趋势来看，沙尘暴活动加剧是不可避免的，人类活动并非导致沙尘暴的主要原因，只不过加剧其程度而已。

Many academicians regard that the cause of formation of sand-dust storm mainly is the vegetation in hungriness is destroyed. However according to analyzing the history of loess in the Quaternary Period and records about ＂rain dust＂ in ancient literature, it can be found that sand-dust storm often happened in ancient time, even more acute than today. In fact the loess deposit is direct reason to form sand-dust storm, the ＂rain dust＂ is a kind of dust storm. During Holocene Period, there exists weather change circle about 2500~3000 years. By far, Sub-Atlantic Time that the Earth has gone through 2500 year is about to end, that means that new disaster period will come soon. Thus it is inevitable that sand-dust storm gets more and more serious according to the trend of the Earth weather, the human＇s activity is not the main cause for sand-dust storm.