"Carbon Dioxide Exchange and Nocturnal Processes Over a Mixed Deciduous" by Xuhui Lee, T. Andrew Black et al.
 

Aspen Bibliography

Carbon Dioxide Exchange and Nocturnal Processes Over a Mixed Deciduous Forest

Document Type

Article

Journal/Book Title/Conference

Agricultural and Forest Meteorology

Volume

81

Issue

1-2

First Page

13

Last Page

29

Publication Date

1996

Abstract

This paper reports the results of the analysis of C O 2 exchange from a one-month experiment conducted at a mixed deciduous forest, Camp Borden (80065' W, 44019' N), Canada, in the summer of 1993. The mid-day CO2 flux from the forest under clear sky conditions was around

- 1.0mgm-2s-l,theaveragelightandwateruseefficiencies13mmolCO2(molphoton)-1and 7.95 mgCO2(gH20)-L, and the average noctumal respiration rate 0.21 mgCO2m-2 S-1.

We observed different flow features at heights of 34.5 (14.5 m above the canopy) and 22.4 m at night. Wavelike structures were frequently encountered at z = 34.5 m. Depending on the phase angle between the vertical velocity and CO2 concentration time series, they could act to enhance the co-gradient (upward) flux or to create counter-gradient(downward) flux of CO2. We speculate that the wave events were limited to isolated regions in the upwind direction. Near the tree-tops (z = 22.4 m), the strong wind shear was able to maintain turbulence. Inverse temperature ramp structures were very common and flux of sensible heat was well behaved (directed downward).

Plum Print visual indicator of research metrics
PlumX Metrics
  • Citations
    • Citation Indexes: 51
  • Usage
    • Abstract Views: 7
  • Captures
    • Readers: 48
see details

Share

 
COinS
 
 
 
BESbswy