请问最近东北地区的沙尘天气及南方雨水增多是什么原因?

请问最近东北地区的沙尘天气及南方雨水增多是什么原因? 高中地理”为什么我国南方沙尘天气较少?名师一号的题,6环境保护 怎样减少沙尘天气的发生 沙尘天气是怎样形成的 沙尘天气产生的原因及其危害 我国沙尘天气的分布规律! 南方的雨水天气将持续多长的时间?成因是什么? 我国南方地区春节以来大范围持续性的雨水天气由什么导致? 造成我国沙尘天气的天气系统是 如何减少沙尘天气 什么叫强对流天气?近段时间南方的雨水是这个现象造成的吗? 什么叫强对流天气?近段时间南方的雨水是这个现象造成的吗? 为什么今年南方的雨水多,北方的雨水少 如何减轻沙尘天气对北京的影响? 如何减少沙尘天气对人类的危害JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ~~~~ 为什么今年的南方雨水这么多? 为什么南方的雨水比较多呢 蚂蚁增多预兆地震吗?最近,我家蚂蚁突然增多,而且还爬的还很高?请问是要地震吗?