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Varying Contributions of Drivers to the Relationship Between Canopy Photosynthesis and Far-Red Sun-Induced Fluorescence for Two Maize Sites at Different Temporal Scales

Miao, Guofang and Guan, Kaiyu and Suyker, Andrew E. and Yang, Xi and Arkebauer, Timothy J. and Walter‐Shea, Elizabeth A. and Kimm, Hyungsuk and Hmimina, Gabriel Y. and Gamon, John A. and Franz, Trenton E. and Frankenberg, Christian and Berry, Joseph A. and Wu, Genghong (2020) Varying Contributions of Drivers to the Relationship Between Canopy Photosynthesis and Far-Red Sun-Induced Fluorescence for Two Maize Sites at Different Temporal Scales. Journal of Geophysical Research: Biogeosciences, 125 (2). Art. No. e2019JG005051. ISSN 2169-8953. doi:10.1029/2019jg005051.

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Sun‐induced fluorescence (SIF) has been found to be strongly correlated with gross primary production (GPP) in a quasi‐linear pattern at the scales beyond leaves. However, the causes of the GPP:SIF relationship deviating from a linear pattern remain unclear. In the current study conducted at two maize sites in Nebraska in 2017 summer growing season, we investigated the relationship between GPP and SIF at 760 nm (F₇₆₀) at two temporal scales and quantified the contributions of incoming photosynthetically active radiation (PAR_(in)), fraction of absorbed PAR (fPAR), light use efficiency (LUE), and F₇₆₀ yield (F₇₆₀,y, defined as F760/(PAR_(in)×fPAR)) to GPP and F₇₆₀ variabilities to further understand the linearity and deviations in the GPP:F₇₆₀ relationship. We found the following: (1) For individual growth stages when canopy structure and chlorophyll content were stable, GPP and F₇₆₀ were strongly controlled by PAR_(in), while LUE and F₇₆₀,y had much lower contributions to the GPP:F₇₆₀ relationship; during this period, LUE and F₇₆₀,y had either a slightly negative or no clear relationship, which explained some deviations in the GPP:SIF relationship. (2) At the seasonal scale, the contribution of LUE to GPP variability as well as the contribution of F₇₆₀,y to F₇₆₀ variability increased and was comparable to the contribution of PARin; the LUE:F₇₆₀,y relationship showed a strong linear relationship, which strengthened the linear GPP:F₇₆₀ relationship. Both maize sites showed similar patterns. A framework was applied to estimate LUE at individual stages and as a result, significantly improved the GPP estimation, thus enhancing the SIF potential for inferring photosynthesis.

Item Type:Article
Related URLs:
URLURL TypeDescription
Miao, Guofang0000-0001-5532-932X
Yang, Xi0000-0002-5095-6735
Kimm, Hyungsuk0000-0001-8189-0874
Gamon, John A.0000-0002-8269-7723
Franz, Trenton E.0000-0003-2947-0906
Frankenberg, Christian0000-0002-0546-5857
Wu, Genghong0000-0002-6227-6390
Additional Information:© 2020 American Geophysical Union. Received 27 JAN 2019; Accepted 22 JAN 2020; Accepted article online 26 JAN 2020. K. G., G. M., H. K., and G. W. acknowledge the support from NASA New Investigator Award and NASA Terrestrial Ecology Program and DOE CABBI funding. C. F. and K. G. also acknowledge support from NASA Carbon Cycle Science. SIF data of this study are available at‐5893373_V1. The two study sites are part of the AmeriFlux long‐term cropland sites. GPP and PAR data are available on the AmeriFlux website. The US‐Ne1, US‐Ne2, and US‐Ne3 AmeriFlux sites are supported by the Lawrence Berkeley National Lab AmeriFlux Data Management Program and by the Carbon Sequestration Program, University of Nebraska‐Lincoln Agricultural Research Division. Funding for AmeriFlux core site data was provided by the U.S. Department of Energy's Office of Science. Partial support from the Nebraska Agricultural Experiment Station with funding from the Hatch Act (accession 1002649) through the USDA National Institute of Food and Agriculture is also acknowledged.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
United States Department of Agriculture (USDA)UNSPECIFIED
Subject Keywords:Sun‐induced fluorescence (SIF); gross primary production (GPP); light use efficiency (LUE); SIF yield; maize
Issue or Number:2
Record Number:CaltechAUTHORS:20200409-102029155
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Official Citation:Miao, G., Guan, K., Suyker, A. E., Yang, X., Arkebauer, T. J., Walter‐Shea, E. A., et al. (2020). Varying contributions of drivers to the relationship between canopy photosynthesis and far‐red Sun‐induced fluorescence for two maize sites at different temporal scales. Journal of Geophysical Research: Biogeosciences, 125, e2019JG005051.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102432
Deposited By: Tony Diaz
Deposited On:09 Apr 2020 17:34
Last Modified:16 Nov 2021 18:12

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