Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Atmospheric Sciences》 2006-01
Add to Favorite Get Latest Update

A Study of the Emission Characteristics of Volatile Organic Compounds at Different Grasslands

BAI Jian-Hui~(1) and Brad Baker~(2)1 Laboratory for Middle Atmosphere Layer and Globe Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 1000292 California State University,CA 95819,USA  
A synthetic experiment about volatile organic compounds(VOC),solar radiation,and meteorological parameters is carried out at different plots in the Inner Mongolia grassland in September 2003.At fixed and new aneurolepidium chinense sample plots(ACSP),fenced plot,moderated grazed plot and heavy grazed plot,the emission fluxes of isoprene,α-pinene,β-pinene,carene and limonene show obvious diurnal variations,and are consistent with solar visible radiation and leaf temperature.The maximum emission fluxes of isoprene of ACSP,fenced plot,mo-(derated) grazed plot and heavy grazed plot are 139.5,25.9,132.3,107.1 μg(C)·m~(-2)·h~(-1).In most instances,(isoprene) emission from ACSP is higher than fenced plot,and heavy grazed plot higher than moderated grazed plot.Generally,the emission fluxes of α-pinene,β-pinene,carene and limonene from heavy grazed plot are higher than moderated grazed plot.When the grasslands are cut,almost all emissions of VOC are enhanced for moderated and heavy grazed grasses,and isoprene emission is also enhanced around the noon.The emission fluxes of isoprene,α-pinene,β-pinene,carene and limonene from heavy grazed plot are higher than moderated grazed plot after these grasses are cut.The emissions of isoprene,α-pinene and β-pinene from soil are very small,with the ratio of 0.2%,0,3.0% to a fixed ACSP at similar solar visible radiation and leaf temperature,respectively.
【Fund】: 国家自然科学基金资助项目40175031;; 美国国家自然科学基金资助项目0131785
【CateGory Index】: S812
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved