干旱气象 ›› 2015, Vol. 33 ›› Issue (1): 38-44.DOI: 10.11755/j.issn.1006-7639(2015)-01-0038

• 论文 • 上一篇    下一篇

河西走廊农业区春季气溶胶光学特性

史晋森田鹏飞周 天黄忠伟   

  1. 兰州大学大气科学学院, 半干旱气候变化教育部重点实验, 甘肃 兰州 730000
  • 出版日期:2015-02-28 发布日期:2015-02-28
  • 作者简介:史晋森(1982-),男,山西运城人,博士,工程师,主要从事地面气溶胶观测研究.E-mail:shijs@lzu.edu.cn
  • 基金资助:

    国家重大科学研究计划(2012CB955302)、国家自然科学基金项目(41405113)、高等学校学科创新引智计划(B13045)共同资助

Aerosol Optical Properties in Spring in Agricultural Area in Hexi Corridor

SHI JinsenTIAN PengfeiZHOU TianHUANG Zhongwei   

  1. Key Laboratory for Semi - Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China
  • Online:2015-02-28 Published:2015-02-28

摘要:

为研究干旱农业区农耕季节气溶胶的基本光学特性,2014年4月利用地面气溶胶移动集成系统在甘肃武威黄羊镇农场开展气溶胶综合观测试验。结果表明,河西走廊黄羊镇农场PM2.5和PM1.0的散射系数以及PM2.5的吸收系数分别为98.2±38.3、74.6±29和8.8±6.3Mm-1,均小于中东部地区观测值。气溶胶单次散射反照率为0.90±0.03,PM2.5和PM1.0的Angstrom指数分别为1.31±0.29和2.10±0.24。散射系数和吸收系数的日变化具有明显的双峰特征,单次散射反照率在散射系数出现峰值的时间段出现谷值。黄羊镇农场受人为气溶胶影响较大,西西南和东南方向来的气溶胶散射系数和吸收系数值较大,西北方向传输过来的气溶胶主要是农业生产活动产生的。

关键词: 河西走廊, 大气气溶胶, 光学特性, 农业活动

Abstract:

In order to study basic aerosol optical properties in arid agricultural region during the farming season,a field campaign was carried out using the ground aerosol integrated observation system at the Huangyangzhen Farm site in Wuwei of Gansu Province in April of 2014. Results show that the scattering coefficients of PM2. 5 and PM1. 0 at the Huangyangzhen Farm site in Hexi Corridor were 98. 2 ± 38. 3 Mm - 1,74. 6 ± 29. 1 Mm - 1,respectively. The absorption coefficient of PM2. 5 was 8. 8 ± 6. 3 Mm - 1. These values were all smaller than that observed in the central - eastern regions of China. The SSA was 0. 90 ± 0. 03,and the Angstrom exponents of PM2. 5 and PM1. 0 were 1. 31 ± 0. 29 and 2. 10 ± 0. 24,respectively. Diurnal variation of aerosol scattering and absorption coefficients appeared two peaks,while SSA appeared two valleys values. Aerosol was greatly influenced by anthropogenic aerosol at Huangyangzhen site. Scattering and absorption coefficients of aerosol from the western,the southwestern and the southeastern regions were larger,and aerosol from the northeastern direction contained more dust aerosol generated by agricultural activities.

Key words: atmospheric aerosol, optical properties, agricultural activities, Hexi Corridor

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