| 辽西北沙化土地起尘量估算及对沈阳大气环境影响的初步研究 |
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| 引用本文： | 夏广锋,胡成,周昊.辽西北沙化土地起尘量估算及对沈阳大气环境影响的初步研究[J].气象与环境学报,2007,23(6):57-61. |
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| 作者姓名： | 夏广锋 胡成 周昊 |
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| 作者单位： | 辽宁省环境科学研究院 沈阳110031 |
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| 基金项目： | 辽宁省环保开放实验室开放资金项目资助 |
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| 摘 要： | 辽西北沙化土地面积约为12368 km2。在大风条件下,沙地扬起大量沙尘,在本地和大风经过的地带形成沙尘天气。利用US EPA推荐的地面起尘的半经验公式,估算了辽西北沙地地面尘的排放总量和各季节的排放量。结果表明:辽西北地区起尘量(PM50)为1.38×105t/a,春季起尘量占全年的70.2%。同时以2004年气象资料和空气质量监测数据为基础,利用CALPUFF模拟系统对沈阳市空气质量进行模拟。定量解析了辽西北沙地可吸入颗粒物(PM10)对沈阳空气质量的贡献率,贡献率较大主要集中在春冬季,年平均贡献率为26.9%。%。
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| 关 键 词： | 沙化土地 起尘量 扩散模式 |
| 收稿时间： | 2007-06-28 |
| 修稿时间： | 2007-09-28 |
Estimation on dust emission from ground surface in northwest of Liaoning province and its effect on Shenyang atmospheric environment |
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| XIA Guangfeng,HU Cheng,ZHOU Hao.Estimation on dust emission from ground surface in northwest of Liaoning province and its effect on Shenyang atmospheric environment[J].Journal of Meteorology and Environment,2007,23(6):57-61. |
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| Authors: | XIA Guangfeng HU Cheng ZHOU Hao |
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| Institution: | Liaoning Academy of Environmental Sciences;Shenyang 110031 |
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| Abstract: | In the northwest of Liaoning province,desertification land areas are about 12368 km2.Under the gale weather,lots of sand and dust was raised from the sandy land surface,which caused the sand-dust weather.The total amounts of dust into the atmosphere from ground surface and dust emission amounts of different seasons were calculated with US EPA formulas.The results indicated that the dust emission amount(PM50) from ground surface was 1.38×105 t/a in the northwest of Liaoning province.The dust emission amount in spring accounted for 70.2% of annual dust emission amount.In terms of meteorological data and atmospheric pollutants monitoring data in 2004,the air quality of Shenyang was simulated by CALPUFF diffusion model.The inhalable particle(PM10) contribution ratio to the air quality of Shenyang was detected.The contribution ratio was higher in spring and in winter,and the annual average one was 26.9%. |
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| Keywords: | Sandy land Dust emission Diffusion model Contribution ratio |
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