Aspen Bibliography
Spatial and temporal variability of CO2 concentration and flux in a boreal aspen forest
Document Type
Article
Journal/Book Title/Conference
Journal of Geophysical Research: Special section BOREAS in 1999: experiment and science overview
Volume
104
Issue
D22
First Page
27653
Last Page
27661
Publication Date
1999
Abstract
In conjunction with eddy covariance measurements of CO2 fluxes at the 39.5-m height over a 21.5-m-tall boreal aspen stand in northern Saskatchewan, CO2 concentration was measured at eight heights in order to calculate net ecosystem exchange. During both leafless and full-leaf periods, daytime vertical CO2 concentration gradients above 9 m were weak (r2 = 0.70) in unstable conditions. However, average daytime and nighttime CO2 fluxes over the 10 days agreed to within 5%. This suggests that partitioning net ecosystem exchange between overstory and understory on an hourly basis using a single-understory eddy covariance system is inadvisable; however, partitioning probably can be done quite reliably using 5-day average fluxes.
Recommended Citation
Yang, P.C.; Black, T.A.; Neumann, H.H.; Novak, M.D.; and Blanken, P.D., "Spatial and temporal variability of CO2 concentration and flux in a boreal aspen forest" (1999). Aspen Bibliography. Paper 936.
https://digitalcommons.usu.edu/aspen_bib/936