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Title: Advancing Terrestrial Ecosystem Science With a Novel Automated Measurement System for Sun‐Induced Chlorophyll Fluorescence for Integration With Eddy Covariance Flux Networks

Abstract

Sun–induced chlorophyll fluorescence (SIF) provides critical information on the dynamics of gross primary productivity, a unique role not readily achievable using other methods. Long–term continuous SIF observations have the potential to advance terrestrial ecosystem science. Realizing this potential, however, requires synergistic implementation of SIF measurements within eddy covariance (EC) flux networks. There is a need for SIF systems that can integrate seamlessly with EC instrumentation to maximize synergistic use of obtained data. Here we introduce the Fluorescence Auto–Measurement Equipment (FAME) and protocol that fulfill such a purpose. FAME is designed specifically for plug–and–play integration with existing EC data acquisition systems. Its innovative hardware and software designs provide versatility, extensibility, autonomous operation, and ease of maintenance for acquiring SIF data of high quality and quantity. A major novel feature of FAME is its synchronized sampling of spectral irradiance and environmental variables, allowing for more precise interpretation of the SIF signal. FAME has been deployed since September 2016 at the Missouri Ozark AmeriFlux site, providing high–quality measurements even when air temperatures approached 40 °C. Results reveal that canopy SIF saturated or even slightly decreased at high light, similar to leaf–level photosynthesis. Clear diurnal hysteresis was observed: For the same light, morning SIFmore » was higher than afternoon. Dynamic energy dissipation processes and stress–induced movements of chloroplasts and leaves may explain the observed pattern. The technology and measurement protocol introduced here advances the coordinated observation of SIF and EC fluxes and represents a step change in observational ecosystem and carbon cycle science research.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Missouri, Columbia, MO (United States)
  3. Cornell Univ., Ithaca, NY (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1491063
Alternate Identifier(s):
OSTI ID: 1560409
Grant/Contract Number:  
AC05-00OR22725; DE‐AC05‐00OR22725
Resource Type:
Published Article
Journal Name:
Journal of Geophysical Research. Biogeosciences
Additional Journal Information:
Journal Volume: 124; Journal Issue: 1; Journal ID: ISSN 2169-8953
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; instrument design and measurement protocol; canopy photosynthesis; gross primary production; nonphotochemical quenching; ecosystem carbon cycle

Citation Formats

Gu, Lianhong, Wood, Jeff D., Chang, Christine Y. ‐Y., Sun, Ying, and Riggs, Jeffrey S. Advancing Terrestrial Ecosystem Science With a Novel Automated Measurement System for Sun‐Induced Chlorophyll Fluorescence for Integration With Eddy Covariance Flux Networks. United States: N. p., 2018. Web. doi:10.1029/2018JG004742.
Gu, Lianhong, Wood, Jeff D., Chang, Christine Y. ‐Y., Sun, Ying, & Riggs, Jeffrey S. Advancing Terrestrial Ecosystem Science With a Novel Automated Measurement System for Sun‐Induced Chlorophyll Fluorescence for Integration With Eddy Covariance Flux Networks. United States. doi:10.1029/2018JG004742.
Gu, Lianhong, Wood, Jeff D., Chang, Christine Y. ‐Y., Sun, Ying, and Riggs, Jeffrey S. Tue . "Advancing Terrestrial Ecosystem Science With a Novel Automated Measurement System for Sun‐Induced Chlorophyll Fluorescence for Integration With Eddy Covariance Flux Networks". United States. doi:10.1029/2018JG004742.
@article{osti_1491063,
title = {Advancing Terrestrial Ecosystem Science With a Novel Automated Measurement System for Sun‐Induced Chlorophyll Fluorescence for Integration With Eddy Covariance Flux Networks},
author = {Gu, Lianhong and Wood, Jeff D. and Chang, Christine Y. ‐Y. and Sun, Ying and Riggs, Jeffrey S.},
abstractNote = {Sun–induced chlorophyll fluorescence (SIF) provides critical information on the dynamics of gross primary productivity, a unique role not readily achievable using other methods. Long–term continuous SIF observations have the potential to advance terrestrial ecosystem science. Realizing this potential, however, requires synergistic implementation of SIF measurements within eddy covariance (EC) flux networks. There is a need for SIF systems that can integrate seamlessly with EC instrumentation to maximize synergistic use of obtained data. Here we introduce the Fluorescence Auto–Measurement Equipment (FAME) and protocol that fulfill such a purpose. FAME is designed specifically for plug–and–play integration with existing EC data acquisition systems. Its innovative hardware and software designs provide versatility, extensibility, autonomous operation, and ease of maintenance for acquiring SIF data of high quality and quantity. A major novel feature of FAME is its synchronized sampling of spectral irradiance and environmental variables, allowing for more precise interpretation of the SIF signal. FAME has been deployed since September 2016 at the Missouri Ozark AmeriFlux site, providing high–quality measurements even when air temperatures approached 40 °C. Results reveal that canopy SIF saturated or even slightly decreased at high light, similar to leaf–level photosynthesis. Clear diurnal hysteresis was observed: For the same light, morning SIF was higher than afternoon. Dynamic energy dissipation processes and stress–induced movements of chloroplasts and leaves may explain the observed pattern. The technology and measurement protocol introduced here advances the coordinated observation of SIF and EC fluxes and represents a step change in observational ecosystem and carbon cycle science research.},
doi = {10.1029/2018JG004742},
journal = {Journal of Geophysical Research. Biogeosciences},
number = 1,
volume = 124,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1029/2018JG004742

Citation Metrics:
Cited by: 3 works
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Figures / Tables:

Figure 1 Figure 1: The primary configuration of the fluorescence auto-measurement equipment (FAME) system. TEC stands for thermoelectric cooling. The line from the datalogger to the motor denotes control signal, and the line denoting power supply to the motor is omitted for clarity.

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