Dynamics and its prediction of 137Cs in soils in semi-arid region, Northeast Asia

在东北亚半干旱地区，近年来家畜数量迅速增加。牲畜大量过度放牧，造成天然草地严重退化。此外，由于东亚大陆最近的气候变化造成的大面积干旱，草地植被覆盖减少。这些变化很可能导致严重的土壤退化，并将大量土壤粉尘释放到大气中。本研究阐明了草地退化及其对亚洲沙尘现象的影响。

In semi-arid region, Northeast Asia, the livestock population has rapidly increased in recent years. Excessive grazing due to large numbers of livestock causes severe degradation of natural grassland. Furthermore, the vegetation cover of grassland has been reduced by extensive droughts caused by recent climatic changes in continental East Asia. These changes are likely to result in severe soil degradation and the release of large quantities of soil dust into the atmosphere. This study clarified the degradation of grassland and its influence on Asian dust phenomena.