2015年4月1日，强沙尘暴继续侵扰大西北，宁夏、甘肃、青海和新疆各地大面积PM10严重污染，其中南疆各地连续第三十四天遭受沙尘影响。东部各地从南到北受降水影响，空气质量普遍良好。江苏多地维持PM2.5污染。四川盆地污染维持，出现大面积PM2.5和臭氧“复合”污染。MODIS卫星图片上 （10:30AM)，大西北黄龙肆虐，四川盆地灰霾弥漫。
中国环境监测总站城市日报截图：2015年4月1日
NASA TERRA 2015年4月1日10:30AM真彩图片，来自NASA Worldview.
NASA AQUA 2015年4月1日1:30PM真彩图片，来自NASA Worldview.
NASA TERRA 2015年4月1日10:30AM真彩图片，四川盆地放大，来自NASA Worldview.
NASA TERRA 2015年4月1日10:30AM真彩图片，西北放大，来自NASA Worldview.
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