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中国沙漠 ›› 2009, Vol. 29 ›› Issue (1): 183-188.

• 天气与气候 • 上一篇    下一篇

半干旱区冬春季黑碳气溶胶吸收特性的观测研究

章秋英1, 牛生杰1, 沈建国2, 王英舜3, 武 魁3, 王 敏3, 张凯霞3

  

  1. 1.南京信息工程大学 中国气象局大气物理与大气环境重点开放实验室, 江苏 南京 210044; 2.山东省气象局, 山东 济南 250031; 3.内蒙古锡林浩特国家气候观象台, 内蒙古 锡林浩特 026000
  • 收稿日期:2007-08-31 修回日期:2007-10-16 出版日期:2009-01-20 发布日期:2009-01-20

Observational Study on Aerosol Absorption Properties inWinter and Spring in Semiarid Area

ZHANG Qiu-ying1, NIU Sheng-jie1, SHEN Jiao-guo2, WANG Ying-shun3,
WU Kui3, WANG Min3, ZHANG Kai-xia3

  

  1. 1.Key Laboratory for Atmospheric Physics & Environment(LAPE) of China Meteorological Administ4ation (CMA), Nanjing University of Information Science & Technology( NUIST), Nanjing 210044, China; 2.Shandong Meteorological Bureau, Jinan 250031, China; 3.Xilinhot National Climate Observation, Xilinhot 026000, China
  • Received:2007-08-31 Revised:2007-10-16 Online:2009-01-20 Published:2009-01-20

摘要:

利用2006年4月和12月锡林浩特观象台黑碳灰度仪的观测资料,分析了半干旱地区黑碳气溶胶浓度的变化特征,讨论了引起这些变化特征的影响因子。结果表明,黑碳气溶胶浓度冬季远大于春季,日变化呈明显的双峰型;讨论了风速对黑碳气溶胶浓度不同影响的范围,可知风速在较小的情况下(小于3.5 m·s-1),黑碳气溶胶浓度值随风速的增大而减小;在3.5~4.5 m·s-1之间,风速增大,黑碳气溶胶浓度值也增大;风速较大(大于4.5 m·s-1)后,黑碳气溶胶浓度与风速之间没有明显的相关性。冬季12月由于黑碳气溶胶吸收作用造成的消光占总气溶胶消光的25%。

关键词: 黑碳气溶胶, 吸收特性, 能见度, 影响因子

Abstract:

The aerosol absorption properties were measured with an aethalometer in April and December 2006. Analyzing these real-time black carbon (BC) mass concentration data, we found that the BC mass concentration in winter was much larger than in spring, the daily variations of concentration in the two seasons present a curve of bi-peaks. We specially analyzed the wind speed range which has different influence on BC concentration, and found that when the wind speed is slow(less than 3.5 m·s-1 ), there has an significantly dilution effect to BC concentration. When the wind speed is between 3.5~4.5 m·s-1, the BC concentration increases as the wind speed increased. When the wind speed is larger than 4.5 m·s-1, no apparent relevance is occurred. We also discussed the relationship between the absorption coefficient and the visibility, and we found that the extinction due to aerosol absorption is 25% of the total extinction which due to aerosol absorption and scattering in winter.

Key words: black carbon aerosol, absorption properties, visibility, influencing factor

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