【摘要】 沙尘暴是一种自然的天气现象,本文初步分析了东亚地区(中、日、韩)沙尘暴发生的时空变化特征;提出了沙尘暴具有正负两方面的效应,论述了正面的生态效益,即中和酸雨、提供矿质营养、缓解温室效应、太阳伞效应、净化大气。此外,还对如何全面认识沙尘暴做了相关阐述。更多还原

【Abstract】 The paper introduced the facts that sand-dust storms happened both in ancient China and on the Mars, a planet closest to the earth. Sand-dust storm is a normal natural phenomenon on the earth. The temporal and spatial variation characters of the sand-dust of eastern Asia (including China, Korea and Japan) are described. The positive and negative ecological effects, especially the positive ecological benefits of sand-dust storm were discussed. The ecological benefits included the following five aspects: sand-dust storm may neutralize the acid deposition, provide the phytoplankton in the ocean with abundant mineral substance, restrain the earth from warming up, offer a parasol effect to shield off the sunlight and remove some toxic substance in the atmosphere. How to understand and be up against the sand-dust storm in a more scientific way is discussed, the future developing tendencies of sand-dust storm are predicted, providing reference fame for the ecologically controlling measure against sand-dust storms.更多还原