| 内蒙古草原挥发性有机物排放通量的研究 |
| 摘要点击 3046 全文点击 2384 投稿时间：2003-02-01 修订日期：2003-06-05 |
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| 中文关键词 内蒙古草原 异戊二烯 挥发性有机物 可见光辐射 温度 |
| 英文关键词 Inner Mongolia isoprene volatile organic compounds solar visible radiation air temperature |
| 作者 | 单位 | | 白建辉 | 中国科学院大气物理研究所中层大气与全球环境探测开放实验室,北京,100029 | | 王庚辰 | 中国科学院大气物理研究所中层大气与全球环境探测开放实验室,北京,100029 | | 任丽新 | 中国科学院大气物理研究所中层大气与全球环境探测开放实验室,北京,100029 | | Brad Baker | South Dakota School of Mines and Technology,USA | | Patrick Zimmerman | South Dakota School of Mines and Technology,USA | | 梁宝生 | 北京大学环境学院,北京,100871 |
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| 中文摘要 |
| 2002年夏季,利用静态箱方法,对我国内蒙古草原生态系统挥发性有机物的排放进行了首次测量,同时观测了太阳辐射、温湿度等参数.结果表明,异戊二烯是草地挥发性有机物排放中的主要成分.异戊二烯的排放有明显的日变化、逐日变化和季节变化规律.因子分析表明,可见光辐射、温度、水汽含量是影响异戊二烯排放的主要因子,而且可见光辐射是控制其排放过程的最主要因子.根据相关分析,在考虑影响异戊二烯的排放因子时,不仅要考虑通常的影响因子--可见光辐射、温度,还要考虑水汽的作用.箱方法的使用不可避免地造成箱内外太阳辐射、温湿度等的差别,因此,必须考虑修正采样箱对挥发性有机物排放通量带来的影响.2002年夏季,异戊二烯排放通量(C)的最大值为1649.3μg/(m2·h).6、8、9月采样期间异戊二烯排放通量的日平均值分别为886.6、707.0、427.2μg/(m2·h). |
| 英文摘要 |
| During the summer season of 2002, emissions of volatile organic compounds were firstly measured by a static enclosure technique at a grassland site in the Inner Mongolia grassland. The parameters including solar radiation, air temperature and relative humidity were also measured in the same time period. The results showed that isoprene was the main component of volatile organic compounds emitted from the grassland. Isoprene exhibited an evident diurnal, daily and seasonal variation. Solar visible radiation, air temperature and water vapor content were the main factors to affect isoprene emission, and solar visible radiation was the most important factor to control the isoprene emission. Base on the correlation analysis, when considering the affecting factors of isoprene emission, it is not only to consider solar visible radiation, temperature, but also the water vapor. It is impossible to avoid the changes of solar radiation, temperature and humidity between inside and outside the chamber by using the enclosure technique. So, it is necessary to take these effects into the considerations and modify isoprene emission. In summer 2002, the maximum emission flux (C) of isoprene was 1649.3μg/(m2·h), and monthly averaged emission flux (C) in June, August and September were 886.6, 707.0 and 427.2 μg/(m2·h), respectively. |
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