Premium
Angle matters: Bidirectional effects impact the slope of relationship between gross primary productivity and sun‐induced chlorophyll fluorescence from Orbiting Carbon Observatory‐2 across biomes
Author(s) -
Zhang Zhaoying,
Zhang Yongguang,
Joiner Joanna,
Migliavacca Mirco
Publication year - 2018
Publication title -
global change biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.146
H-Index - 255
eISSN - 1365-2486
pISSN - 1354-1013
DOI - 10.1111/gcb.14427
Subject(s) - primary production , zenith , biome , solar zenith angle , remote sensing , productivity , satellite , atmospheric sciences , chlorophyll fluorescence , environmental science , physics , fluorescence , optics , geology , ecosystem , ecology , astronomy , biology , macroeconomics , economics
Written Summary: It is important to understand how sun‐sensor geometry affects satellite sun‐induced fluorescence (SIF) in order to take full advantage of these measurements, particularly given their close relationship with gross primary production (GPP). We displayed the bidirectionality of SIF at different viewing zenith angles in the solar principal plane and observed a clear bowl shape of SIF from the backward to forward scattering directions. Therefore, it is important to consider the bidirectionality of SIF when using OCO‐2 SIF data to evaluate the SIF‐GPP relationship.