【摘 要】
：
利用1999—2001年兰州河谷大气中空气污染物的监测数据,结合河西地区沙尘事件频次,分析了兰州河谷大气环境PM10含量的季节变化特征及其成因。结果表明,源于河西地区的沙尘暴对兰州市空气中PM10含量有重要影响,PM10浓度在冬春季较高,在夏季较低。1985—2001年16a来河西走廊中东部沙尘事件年均约为37.6d,兰州河谷年均沙尘事件约为24.4d,两者表现出显著的相关性(R=0.67,P=0
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利用1999—2001年兰州河谷大气中空气污染物的监测数据,结合河西地区沙尘事件频次,分析了兰州河谷大气环境PM10含量的季节变化特征及其成因。结果表明,源于河西地区的沙尘暴对兰州市空气中PM10含量有重要影响,PM10浓度在冬春季较高,在夏季较低。1985—2001年16a来河西走廊中东部沙尘事件年均约为37.6d,兰州河谷年均沙尘事件约为24.4d,两者表现出显著的相关性(R=0.67,P=0.003)。2001年兰州河谷1h平均沙尘PM10浓度统计分析显示:PM10含量大于1.0mg.m-3的
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