AI Article Synopsis
- The paper used an Eulerian second-order closure model to analyze sensible heat distribution and flux characteristics in forest canopies during thermally stratified atmospheric conditions.
- It found that above the canopy, the atmosphere was unstably stratified, while below it was stable, with a 'hot spot' located around two-thirds up the canopy height.
- The research indicated that including buoyancy in the heat balance equation improved the accuracy of simulations and modeled heat flux, aligning well with observed measurements (R2 = 0.9035, P < 0.01).
Article Abstract
By using Eulerian second-order closure model, this paper studied the source-sink distribution and flux characteristics of sensible heat within forest canopy under atmospheric thermally stratified condition. In the daytime, a notable feature for the atmospheric stratification of forest canopy was the unstable stratification above the canopy and the stable stratification under the canopy. The changes of temperature profile indicated there was a 'hot spot' at about 2/3 of canopy height. The counter-gradient fluxes within the canopy were discovered by modeling the heat flux under weak stable atmospheric condition. Simulations of the diurnal variation of sensible heat flux were consistent with the measurements (R2 = 0.9035, P < 0.01). Adding buoyancy in the sensible heat balance equation could increase the simulation accuracy of inversion model, and improve the simulation capability for heat flux balance.
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