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

Zhaoying Zhang; Yongguang Zhang; Joanna Joiner; Mirco Migliavacca

doi:10.1111/gcb.14427

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

Glob Chang Biol. 2018 Nov;24(11):5017-5020. doi: 10.1111/gcb.14427. Epub 2018 Sep 14.

Authors

Zhaoying Zhang^{1

2}, Yongguang Zhang^{1

2}, Joanna Joiner³, Mirco Migliavacca⁴

Affiliations

¹ International Institute for Earth System Sciences, Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, China.
² Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China.
³ National Aeronautics and Space Administration (NASA) Goddard Space Flight Center, Greenbelt, Maryland.
⁴ Max Planck Institute for Biogeochemistry, Jena, Germany.

Abstract

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.

Publication types

Letter

MeSH terms

Biomass*
Chlorophyll / analysis*
Ecosystem*
Fluorescence*
Remote Sensing Technology / instrumentation
Remote Sensing Technology / methods*
Solar System*
Spacecraft

Substances

Chlorophyll