Responses of net ecosystem exchanges of carbon dioxide to changes in cloudiness: Results from two North American deciduous forests

  title={Responses of net ecosystem exchanges of carbon dioxide to changes in cloudiness: Results from two North American deciduous forests},
  author={Lianhong Gu and Jos{\'e} D. Fuentes and Herman H. Shugart and Ralf M. Staebler and Thomas Andrew Black},
  journal={Journal of Geophysical Research},
We analyzed half-hourly tower-based flux measurements of carbon dioxide (CO 2 ) from a boreal aspen forest and a temperate mixed deciduous forest in Canada to examine the influences of clouds on forest carbon uptake. We showed that the presence of clouds consistently and significantly increased the net ecosystem exchanges (NEE) of CO 2 of both forests from the level under clear skies. The enhancement varied with cloudiness, solar elevation angles, and differed between the two forests. For the… 

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