Estimating CO2 exchange at two sites in Arctic tundra ecosystems during the growing season using a spectral vegetation index

被引:41
作者
McMichael, CE [1 ]
Hope, AS
Stow, DA
Fleming, JB
Vourlitis, G
Oechel, W
机构
[1] San Diego State Univ, Dept Geog, San Diego, CA 92182 USA
[2] San Diego State Univ, Dept Biol, Global Change Res Grp, San Diego, CA 92182 USA
关键词
D O I
10.1080/014311699213136
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
Measurements of carbon fluxes in Arctic tundra landscapes are generally obtained through intensive field work and involve the use of chamber and/or micrometeorological tower techniques. However, findings in a variety of nonArctic ecosystems have demonstrated the potential of remote sensing-based techniques (particularly spectral vegetation indices) to provide estimates of CO2 exchange in a more timely and efficient manner. As the first step towards modelling Arctic regional and circumpolar fluxes of CO2 using remotely sensed data, we investigated the relationships between plot-level fluxes of CO2 and a vegetation spectral reflectance index derived from hand-held radiometric data at two sites. These relationships were evaluated for variations in vegetation cover type and environmental factors using data collected during the short Arctic growing season. Overall, this study demonstrated a relationship between the Normalized Difference Vegetation Index (NDVI) and measurements of mean site gross photosynthesis and ecosystem respiration at two sites in Arctic tundra ecosystems on the North Slope of Alaska.
引用
收藏
页码:683 / 698
页数:16
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