Sun-induced fluorescence and gross primary productivity during a heat wave

被引：103

作者：

Wohlfahrt, G. ^{[1
]}

Gerdel, K. ^{[1
]}

Migliavacca, M. ^{[2
]}

Rotenberg, E. ^{[3
]}

Tatarinov, F. ^{[3
]}

Muller, J. ^{[3
]}

Hammerle, A. ^{[1
]}

Julitta, T. ^{[4
]}

Spielmann, F. M. ^{[1
]}

Yakir, D. ^{[3
]}

机构：

[1] Univ Innsbruck, A-6020 Innsbruck, Austria

[2] Max Planck Inst Biogeochem, D-07745 Jena, Germany

[3] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[4] Univ Milano Bicocca, I-20126 Milan, Italy

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

基金：

以色列科学基金会; 欧盟地平线“2020”; 奥地利科学基金会;

关键词：

INDUCED CHLOROPHYLL FLUORESCENCE; CARBONYL SULFIDE COS; STOMATAL CONDUCTANCE; CANOPY PHOTOSYNTHESIS; USE EFFICIENCY; MODEL; TRANSPIRATION; LAND; REFLECTANCE; TEMPERATURE;

D O I：

10.1038/s41598-018-32602-z

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Remote sensing of sun-induced chlorophyll fluorescence (SIF) has been suggested as a promising approach for probing changes in global terrestrial gross primary productivity (GPP). To date, however, most studies were conducted in situations when/where changes in both SIF and GPP were driven by large changes in the absorbed photosynthetically active radiation (APAR) and phenology. Here we quantified SIF and GPP during a short-term intense heat wave at a Mediterranean pine forest, during which changes in APAR were negligible. GPP decreased linearly during the course of the heat wave, while SIF declined slightly initially and then dropped dramatically during the peak of the heat wave, temporally coinciding with a biochemical impairment of photosynthesis inferred from the increase in the uptake ratio of carbonyl sulfide to carbon dioxide. SIF thus accounted for less than 35% of the variability in GPP and, even though it responded to the impairment of photosynthesis, appears to offer limited potential for quantitatively monitoring GPP during heat waves in the absence of large changes in APAR.

引用

页数：9

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