摘要
2006年4月7—10日北京出现空气质量持续重污染,对当地生产和生活带来较大影响。从天气形势、气象要素、流场、大气稳定度等方面分析了这次重污染的形成及维持原因。结果表明,此次连续重污染过程是一次沙尘过程先后两次影响北京所造成。第一次为内蒙沙源地沙尘随西北气流南下影响北京的典型沙尘污染过程;第二次是移至下游的沙尘在“回流”天气形势下沿偏东风返回北京所造成,较为少见。这次重污染是混合型的,是沙尘和静稳气象条件共同作用的结果。
A heavy pollution occurred in Beijing during 7th - 10th April 2006. The synoptic situation, meteorological element, flow field and atmospheric stability of the event are analyzed. The results show that the same sand dust affected Beijing twice and caused continues heavy weather pollution. For the first time, the sand dust of inner Mongolia came down along with the northwest flow and reached Beijing. For the second time, based on ＂refluence＂ weather background, along with the easterly wind, the sand dust which had moved to downstream returned Beijing. The heavy weather pollution is a common action result of sand dust and calming weather condition.
出处
《气象》
CSCD
北大核心
2007年第6期32-36,共5页
Meteorological Monthly
关键词
重污染
沙尘
回流
偏东风
heavy pollution sand dust refluence easterly wind
