Claim · model-written summary
Diurnal carbon dioxide variation reached 100 vpm in the canopy and diminished with height.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingQualifier
Verbatim
t0“native grassland”
e0“The diurnal periodicity has an amplitude maximum in the vegetation canopy, of up to 100 vpm, and this diminishes with increasing height above the surface.”
Title
Carbon dioxide concentrations over a native grassland in Saskatchewan
D. L. Spiltlehouse; E. A. Ripley Tellus A Dynamic Meteorology and Oceanography 1977. doi:10.3402/tellusa.v29i1.11330
Other claims from this paper (4)
- Mechanism Daytime photosynthetic intake and nighttime plant and soil respiration drove the diurnal carbon dioxide variation.
- Association Irregular carbon dioxide variations had 3 to 5 day periods and appeared linked to synoptic weather.
- Observation Carbon dioxide fell with longer trajectories over land, differing by up to 7 vpm in daily minima.
- Observation Mean daily carbon dioxide decreased 28 vpm from June to September.