北京大学学报(自然科学版)

珠三角地区荔枝林挥发性有机化合物通量的观测研究

高祥1,张宏升1,蔡旭晖2,宋宇2,康凌2   

  1. 1. 北京大学物理学院大气与海洋科学系, 北京 100871; 2. 北京大学环境科学与工程学院, 北京100871;
  • 收稿日期:2010-09-14 出版日期:2011-09-20 发布日期:2011-09-20

VOCs Fluxes Analysis Based on Micrometeorological Methods over Litchi Plantation in the Pearl River Delta, China

GAO Xiang1, ZHANG Hongsheng1, CAI Xuhui2, SONG Yu2, KANG Ling2   

  1. 1. Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871; 2. College of Environmental Sciences and Engineering, Peking University, Beijing 100871;
  • Received:2010-09-14 Online:2011-09-20 Published:2011-09-20

摘要: 利用2008年7月和2009年2?3月在珠三角地区开展的挥发性有机化合物(VOCs)和微气象学综合实验观测资料, 分别应用近地面层通量廓线关系法和松弛涡旋累积法(REA)计算了荔枝林下垫面VOCs冠层尺度通量。结果表明: 荔枝林的主要生物挥发性有机化合物(BVOCs)排放为异戊二烯, 其排放有着明显的季节变化和日变化。荔枝林生长季白天的典型异戊二烯通量为0.932 nmol/(m2?s), 非生长季植物排放不显著。该结果为使用微气象学方法获取VOCs通量提供了借鉴。

关键词: 挥发性有机化合物, 荔枝, 人工林, 湍流通量, 近地面层通量廓线关系, 松弛涡旋累积法

Abstract: Observations of VOCs concentration were conducted at a litchi plantation in the Pearl River Delta in July 2008 and February-March 2009 respectively. VOCs fluxes were estimated based on the relationship of flux-gradient and REA method using the VOCs concentration data. Statistical evidence indicates that the major emission matter is isoprene with a typical daytime mean flux 0.932 nmol/(m2?s) in the growing season over the litchi plantation. While in the non growing season, the flux is negligible. This study provides a reliable reference not only for emission rates for litchi and manmade plantation, but also for usage of micrometeorological methods to measure VOCs fluxes.

Key words: VOCs, litchi, plantation, turbulent flux, surface-layer flux-profile relationship, REA

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