Reply toTownsend et al.: Decoupling contributions from canopy structure and leaf optics is critical for remote sensing leaf biochemistry | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Reply toTownsend et al.: Decoupling contributions from canopy structure and leaf optics is critical for remote sensing leaf biochemistry

Type de publication:

Journal Article

Source:

Proceedings of the National Academy of Sciences of the United States of America, Volume 110, Ticket 12, p.E1075-E1075 (2013)

ISBN:

0027-8424

URL:

http://www.pnas.org/content/110/12/E1075

Mots-clés:

Planétologie et sciences spatiales, UMR 7154

Résumé:

Townsend et al. (1) agree that we explained that the apparent relationship (2) between foliar nitrogen (%N) and near-infrared (NIR) canopy reflectance was largely attributable to structure (which is in turn caused by variation in fraction of broadleaf canopy). Our conclusion that the observed correlation with %N was spurious (i.e., lacking a causal basis) is, thus, clearly justified: we demonstrated that structure explained the great majority of observed correlation, where the structural influence was derived precisely via reconciling the observed correlation with radiative-transfer theory. What this also suggests is that such correlations, although observed, do not uniquely provide information on canopy biochemical constituents. We, …

Notes:

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