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overestimation of ecosystem respiration from half‐hourly to annual time‐scales, which can reach >25% for an annual budget and which consequently affects estimates of GEP. Conversely, in summer passive ...
The net ecosystem exchange (NEE) of forests represents the balance of gross primary productivity (GPP) and respiration (R). Methods to estimate these two components from eddy covariance flux ...
the daytime flux ‐partitioned eddy covariance data were within uncertainties during early and peak seasons but overestimated respiration later in the growing season. Overall, this study suggests ...
and broad-leaved mixed forest ecosystem using the open path eddy covariance method. Based on two years of data from 2003 to 2004, the characteristics of temporal variation in CO 2 flux and its response ...
) respiration measurements made at night are extrapolated to the daytime or (2) light–response curves are fit to daytime NEE measurements and respiration is estimated from the intercept of the ordinate, which ...
) components. Currently, however, standard flux measurement techniques, i.e. eddy covariance and manual chambers, generate empirical ER data during only night- or daytime , respectively, which are extrapolated ...
of processes influencing fluxes , or that additional research on the hard-to-measure fluxes (e.g., wintertime R s , unaccounted losses of CO 2 from eddy covariance sites), daytime and nighttime canopy respiration ...
, especially in areas of small roughness (such as pastures), ecosystem respiration rate is poorly measured using the eddy covariance (EC) technique. Nocturnal vertical profiles of temperature, humidity and winds ...
of selective felling (thinning) at a managed forest site. Previous statistical analyses of eddy covariance data at the study site had found that disturbance from thinning resulted in no significant change to net ...
to −30 mmol m−2 h−1. Nocturnal respiration ranged from 0 to +10 mmol m−2 h−1. The conditional sampling observations showed reasonable agreement with measurements of flux by eddy ‐covariance, gradient ...
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