沙尘天气对西安市环境空气质量的影响
胡元洁(
), 蒋楠()
), 蒋楠()
Influence of dust storm on atmospheric environment quality in Xi’an， China
Yuanjie Hu(), Nan Jiang()
), Nan Jiang()
图1. 2013—2018年西安市空气首要污染物发生频率（A）和PM10Ⅲ级及以上污染天数（B）
Fig.1. Average occurrence frequency of primary air-pollutant (A) and occurrence days of PM10 pollution above level Ⅲ (B) in Xi’ an during 2013-2018
