Reduced solar-induced chlorophyll fluorescence from GOME-2 during Amazon drought caused by dataset artifacts

Yao Zhang; Joana Joiner; Pierre Gentine; Sha Zhou

doi:10.1111/gcb.14134

Reduced solar-induced chlorophyll fluorescence from GOME-2 during Amazon drought caused by dataset artifacts

Glob Chang Biol. 2018 Jun;24(6):2229-2230. doi: 10.1111/gcb.14134. Epub 2018 Apr 10.

Authors

Yao Zhang¹, Joana Joiner², Pierre Gentine¹, Sha Zhou¹

Affiliations

¹ Department of Earth and Environmental Engineering, Columbia University, New York, NY, USA.
² NASA Goddard Space Flight Center, Greenbelt, MD, USA.

PMID: 29573512
DOI: 10.1111/gcb.14134

Abstract

Recently, Yang et al. () reported a decrease in solar-induced chlorophyll fluorescence (SIF) during 2015/2016 El Niño event albeit the increase in enhanced vegetation index (EVI). They interpreted the reduced SIF as a signal of reduced ecosystem photosynthesis. However, we argue that the reduced SIF during 2015/2016 is caused by a decreasing trend of SIF due to sensor degradation and the satellite overpass time is critical for drought impact assessment.

Keywords: Amazon forest; drought; photosynthesis; solar-induced chlorophyll fluorescence; vegetation activity.

Publication types

Letter
Comment

MeSH terms

Artifacts
Chlorophyll*
Droughts*
Fluorescence
Photosynthesis
Seasons
Sunlight

Substances

Chlorophyll