Flux-variance and flux-gradient relationships in the roughness sublayer over the Amazon forest

Chor, Tomás; Dias, Nelson Luı́s; Araújo, Alessandro; Wolff, Stefan; Zahn, Einara; Manzi, A. O.; Trebs, Ivonne; Sá, Marta; Teixeira, Paulo Ricardo; Sörgel, Matthias

doi:10.1016/j.agrformet.2017.03.009

Cited by 30 publications

(51 citation statements)

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“…At the 150‐ and 325‐m levels, the scatter is considerably larger than that observed at the lower levels (Figures g–i). Note that the dimensionless velocity gradients ϕ τ found by Chor et al () in the RSL are very close to MOST functions found in the literature. Therefore, neither ϕ τ nor ϕ w are good discriminators between the RSL and the ISL for the ATTO site.…”

Section: Resultssupporting

confidence: 88%

“…Figure shows the nondimensional standard deviations ϕ w = σ w / u * and

ϕ_{θ_{v}} = σ_{θ_{v}} false/ θ_{v *}

as functions of ζ . There is low scatter in σ w / u * and good agreement with the standard function for the ISL reported in the literature (equation (11), Chor et al, ) for the levels 40 m, 55 m, and slightly less so for 81 m (Figures a, c, and e). These results confirm the findings of Zahn et al () and Chor et al () for the same site.…”

Section: Resultssupporting

confidence: 85%

“…There is low scatter in σ w / u * and good agreement with the standard function for the ISL reported in the literature (equation (11), Chor et al, ) for the levels 40 m, 55 m, and slightly less so for 81 m (Figures a, c, and e). These results confirm the findings of Zahn et al () and Chor et al () for the same site. At the 150‐ and 325‐m levels, the scatter is considerably larger than that observed at the lower levels (Figures g–i).…”

Section: Resultssupporting

confidence: 85%

“…The failure of MOST for scalars in the RSL, on the other hand, is evident. A large scatter and deviation from MOST is observed in the values of

σ_{θ_{v}} false/ θ_{v *}

(Figure , right side), as also noted by Dias et al (), and by Zahn et al () and Chor et al () for the same site. Moreover, the scatter increases continuously with height, with no improvement at an intermediate level that could indicate the presence of an ISL.…”

Section: Resultssupporting

confidence: 83%

“…Flux-gradient methods have been assessed in a few studies over forests such as Mölder et al (1999). For the Amazon, MOST dimensionless gradients have been obtained by Viswanadham et al (1990) and more recently by Chor et al (2017). Interestingly, however, results are not reported in terms of errors in the flux estimates.…”

Section: Errors In the Flux-gradient Methodsmentioning

confidence: 99%

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