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| 1961—2012年长江三角洲地区霾日气候特征及变化分析 |
| The Climate Characteristics and Change of Haze Days over the Yangtze River Delta Region during 1961—2012 |
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| DOI： |
| 中文关键词: 霾 气候特征 季节和年代际变化 长江三角洲地区 |
| 英文关键词: Haze Climatic characteristics Seasonal and decadal changes Yangtze River Delta region |
| 基金项目:国家自然科学基金资助项目（41571044和41001283）；中国气象局气候变化专项基金资助项目（CCSF201503） |
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| 中文摘要: |
| 利用长三角地区123个气象站1961—2012年逐日4次能见度和日平均相对湿度数据，对霾与气象条件关系进行分析。结果表明：长三角周边地区多年平均年霾日数大部分在0 d～25 d之间，中部地区在25 d～75 d之间，浙江北方中部的极个别城市在100 d～125 d之间；长三角地区霾日呈现为冬季多、夏季少、春秋季居中的特点；长三角地区年均霾日及四季霾日均呈极显著的增加趋势，其中浙江省中北部地区的年霾日及四季霾日增加速率最大，长三角地区平均年霾日以每十年9.23 d极显著增加；年代际上，年及春秋冬季霾日逐年代递增，而夏季则在20世纪70年代后递增。 |
| 英文摘要: |
| The long term haze days from 1961 to 2012 were reconstructed by using daily average relative humidity and visibility of 123 meteorological stations over the Yangtze River Delta （YRD）, the relationship between the haze and the meteorological conditions were analyzed. The average haze days for many years in most surrounding areas of YRD were between 0 d～25 d, the central regions were between 25 d～75 d, very few cities in the middle of north Zhejiang were between 100 d～125 d. The haze days in YRD appeared more in winter, less in summer, spring and autumn were mediate. In the past 52 years, the annual haze days and seasonal haze days increased very significantly, the annual haze days of YRD increased very significantly with the rate of 9.23 d in ten years. And the interdecadal characteristic showed that the yearly, spring， autumn, winter haze days increased from 1960s, the summer increased from 1970s. |
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