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Effect of environmental conditions on the relationship between solar induced fluorescence and gross primary productivity at an OzFlux grassland site

Verma, Manish and Schimel, David and Evans, Bradley and Frankenberg, Christian and Beringer, Jason and Drewry, Darren T. and Magney, Troy and Marang, Ian and Hutley, Lindsay and Moore, Caitlin and Eldering, Annmarie (2017) Effect of environmental conditions on the relationship between solar induced fluorescence and gross primary productivity at an OzFlux grassland site. Journal of Geophysical Research: Biogeosciences, 122 (3). pp. 716-733. ISSN 2169-8953. https://resolver.caltech.edu/CaltechAUTHORS:20170320-130400902

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Abstract

Recent studies have utilized coarse spatial and temporal resolution remotely sensed solar induced fluorescence (SIF) for modeling terrestrial gross primary productivity (GPP) at regional scales. Although these studies have demonstrated the potential of SIF, there have been concerns about the ecophysiological basis of the relationship between SIF and GPP in different environmental conditions. Launched in 2014, the Orbiting Carbon Observatory-2 (OCO-2) has enabled fine scale (1.3-by-2.5 km) retrievals of SIF that are comparable with measurements recorded at eddy covariance towers. In this study, we examine the effect of environmental conditions on the relationship of OCO-2 SIF with tower GPP over the course of a growing season at a well-characterized natural grassland site. Combining OCO-2 SIF and eddy covariance tower data with a canopy radiative transfer and an ecosystem model, we also assess the potential of OCO-2 SIF to constrain the estimates of V_(cmax), one of the most important parameters in ecosystem models. Based on the results, we suggest that although environmental conditions play a role in determining the nature of relationship between SIF and GPP, overall the linear relationship is more robust at ecosystem scale than the theory based on leaf-level processes might suggest. Our study also shows that the ability of SIF to constrain V_(cmax) is weak at the selected site.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/2016JG003580DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2016JG003580/abstractPublisherArticle
ORCID:
AuthorORCID
Verma, Manish0000-0002-0722-8732
Frankenberg, Christian0000-0002-0546-5857
Beringer, Jason0000-0002-4619-8361
Magney, Troy0000-0002-9033-0024
Eldering, Annmarie0000-0003-1080-9922
Additional Information:© 2017 American Geophysical Union. Accepted manuscript online: 17 March 2017; Manuscript Accepted: 15 March 2017; Manuscript Revised: 14 March 2017; Manuscript Received: 11 August 2016. This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration, Copyright 2017, California Institute of Technology. The authors would like to acknowledge support and funding from OzFlux and the overarching Terrestrial Ecosystem Research Network (TERN), which is supported by the Australian Government through the National Collaborative Research Infrastructure Strategy. This work utilized data collected by grants funded by the Australian Research Council (DP0344744, DP0772981, and DP130101566). Beringer is funded under an ARC FT (FT110100602). Data presented in this paper are included in the supporting information. The two models, PROSAIL and SCOPE, are open source and are available free. PROSAIL can be downloaded from http://teledetection.ipgp.jussieu.fr/prosail/, and SCOPE can be obtained from https://github.com/Christiaanvandertol/SCOPE.
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
National Collaborative Research Infrastructure StrategyUNSPECIFIED
Australian Research CouncilDP0344744
Australian Research CouncilDP0772981
Australian Research CouncilDP130101566
Australian Research CouncilFT110100602
Subject Keywords:Remote sensing; carbon cycle; ecosystem functions
Issue or Number:3
Record Number:CaltechAUTHORS:20170320-130400902
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170320-130400902
Official Citation:Verma, M., et al. (2017), Effect of environmental conditions on the relationship between solar-induced fluorescence and gross primary productivity at an OzFlux grassland site, J. Geophys. Res. Biogeosci., 122, 716–733, doi:10.1002/2016JG003580
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75248
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:20 Mar 2017 20:14
Last Modified:11 Oct 2019 20:46

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