| 乌海市灰霾天气的气候特征分析 |
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| 引用本文： | 孙红斌,王晓丽,刘克利,袁梅.乌海市灰霾天气的气候特征分析[J].内蒙古气象,2011(4):15-16,59. |
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| 作者姓名： | 孙红斌 王晓丽 刘克利 袁梅 |
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| 作者单位： | 内蒙古气象科技服务中心,内蒙古呼和浩特,010051 |
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| 摘 要： | 利用乌海市1971—2009年每天4个时次（或3个时次）的常规地面观测资料和2004—2009年的空气质量状况（PM10、SO2、NO2浓度值）,统计分析了乌海市灰霾的分布特征和规律以及出现灰霾时的相对湿度、平均水平能见度、2分钟平均风速、风向特征和空气质量状况。得到：（1）乌海市1971—2009年共出现165次灰霾天气,2004年以后出现了161次,最多出现在2007年和2009年;春季出现次数最多,冬季最少;4月出现最多,1月和2月出现最少;82.4%的灰霾天气出现在08时。（2）当出现灰霾时,相对湿度在60%以下占71%,相对湿度在70%以上时绝大部分是与雾同时出现;灰霾天气出现最多风向是偏南风,最多风速是≤3.0 m.s-1。（3）2004—2006年出现灰霾时92%的空气质量出现了三级轻微或轻度污染,2007年以后出现灰霾时,在冬半年空气质量绝大部分为三级轻微或轻度污染,而在夏半年大部分空气质量为良。
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| 关 键 词： | 灰霾 特征 空气质量 |
Analysis on Climatic Characteristics of Haze Weather in Wuhai City |
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| Authors: | Sun Hongbin Wang Xiaoli Liu Keli Yuan Mei |
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| Institution: | (Inner Mongolian Meteorological Science ＆ Technology Service Center,Inner Mongolian Hohhot 010051) |
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| Abstract: | Using the convention ground observation data for four time orders（three time orders） every day from 1971 to 2009 years and air quality condition（the concentration of PM10、SO2、NO2） from 2004 to 2009 years.The distribution characteristics and law of haze and the relative humidity,average horizontal visibility,average wind speed per two minute,wind direction characteristic and air quality condition when the haze appeared were analyzed.The results showed that there were 165 times haze weather from 1971 to 2009 years,after 2004 years,the haze weather appeared for 161 times,the 2007 and 2009 years were maximum years,the most haze weather appeared on April of spring,and the least on January and February of winter,the 82.4 percent haze weather appeared in 8：00 Am.The relative humidity of 71% haze weather was under 60%,the haze weather appeared with fog when the relative humidity above 70%,the most wind direction was southerly wind,the major wind speed was ≤3.0 m·s-1.When the haze weather appeared from 2004 to 2009 years,92% air was three-level slight pollution,after 2007 years,this phenomenon appeared in winter,but the air quality was well. |
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| Keywords: | haze characteristics air quality |
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