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Moisture availability mediates the relationship between terrestrial gross primary production and solar-induced fluorescence: Insights from global scale variations

Chen, Anping and Mao, Jiafu and Ricciuto, Daniel and Xiao, Jingfeng and Frankenberg, Christian and Li, Xing and Thornton, Peter E. and Gu, Lianhong and Knapp, Alan K. (2020) Moisture availability mediates the relationship between terrestrial gross primary production and solar-induced fluorescence: Insights from global scale variations. Global Change Biology . ISSN 1354-1013. (In Press) https://resolver.caltech.edu/CaltechAUTHORS:20201002-100219021

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Abstract

Effective use of solar‐induced chlorophyll fluorescence (SIF) to estimate and monitor gross primary production (GPP) in terrestrial ecosystems requires a comprehensive understanding and quantification of the relationship between SIF and GPP. To date, this understanding is incomplete and somewhat controversial in the literature. Here we derived the GPP/SIF ratio from multiple data sources as a diagnostic metric to explore its global‐scale patterns of spatial variation and potential climatic dependence. We found that the growing season GPP/SIF ratio varied substantially across global land surfaces, with the highest ratios consistently found in boreal regions. Spatial variation in GPP/SIF was strongly modulated by climate variables. The most striking pattern was a consistent decrease in GPP/SIF from cold‐and‐wet climates to hot‐and‐dry climates. We propose that the reduction in GPP/SIF with decreasing moisture availability may be related to stomatal responses to aridity. Furthermore, we show that GPP/SIF can be empirically modelled from climate variables using a machine learning (random forest) framework, which can improve the modelling of ecosystem production and quantify its uncertainty in global terrestrial biosphere models. Our results point to the need for targeted field and experimental studies to better understand the patterns observed and to improve the modelling of the relationship between SIF and GPP over broad scales.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/gcb.15373DOIArticle
https://avdc.gsfc.nasa.gov/pub/data/satellite/MetOp/GOME_F/v28Related ItemGOME-2 SIF data
http://globalecology.unh.eduRelated ItemGOSIF data
ftp://fluo.gps.caltech.edu/data/tropomiRelated ItemTROPOMI SIF data
https://www.bgcjena.mpg.de/geodb/projects/Data.phpRelated ItemFLUXCOM GPP data
https://e4ftl01.cr.usgs.gov/MOLT/MOD17A2H.006Related ItemMODIS GPP data
http://www.cru.uea.ac.uk/dataRelated ItemCRU climatic data
ftp://ext-catdscecsm:catds2010@ftp.ifremer.fr/Land_productsRelated ItemSMOS-IC soil moisture data
ORCID:
AuthorORCID
Chen, Anping0000-0003-2085-3863
Ricciuto, Daniel0000-0002-3668-3021
Xiao, Jingfeng0000-0002-0622-6903
Frankenberg, Christian0000-0002-0546-5857
Gu, Lianhong0000-0001-5756-8738
Additional Information:© 2020 Wiley. Accepted manuscript online: 01 October 2020. The work is supported by an Oak Ridge National Lab subcontract (4000167205). J.M., D.R. and L.G. were supported by the Terrestrial Ecosystem Science Scientific Focus Area (TES SFA) project funded by the US Department of Energy, Office of Science, Office of Biological and Environmental Research. P.T. was supported as part of the Energy Exascale Earth System Model (E3SM) project, funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research. Oak Ridge National Laboratory is supported by the Office of Science of the US Department of Energy under Contract No. DE-AC05-00OR22725. J. X. and X. L. were supported by the National Aeronautics and Space Administration (NASA)’s Climate Indicators and Data Products for Future National Climate Assessments (Grant number: NNX16AG61G). We also thank two anonymous reviewers for their constructive comments which helped improve our manuscript. Data Availability Statement: The data that support the findings of this study are openly available, hosted by different agencies and institutions. The GOSAT SIF data are available on request from Christian Frankenberg (cfranken@caltech.edu). The GOME-2 SIF data are available at https://avdc.gsfc.nasa.gov/pub/data/satellite/MetOp/GOME_F/v28/. The GOSIF data are available at http://globalecology.unh.edu/. The TROPOMI SIF data are available at ftp://fluo.gps.caltech.edu/data/tropomi/. The FLUXCOM GPP data are available at https://www.bgcjena.mpg.de/geodb/projects/Data.php. The MODIS GPP data are available at https://e4ftl01.cr.usgs.gov/MOLT/MOD17A2H.006/. The CRU climatic data are available at http://www.cru.uea.ac.uk/data/. The SMOS-IC soil moisture data are available at ftp://ext-catdscecsm:catds2010@ftp.ifremer.fr/Land_products.
Funders:
Funding AgencyGrant Number
Oak Ridge National Laboratory4000167205
Department of Energy (DOE)DE-AC05-00OR22725
NASANNX16AG61G
Record Number:CaltechAUTHORS:20201002-100219021
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20201002-100219021
Official Citation:Chen, A., Mao, J., Ricciuto, D., Xiao, J., Frankenberg, C., Li, X., Thornton, P.E., Gu, L. and Knapp, A.K. (2020), Moisture availability mediates the relationship between terrestrial gross primary production and solar‐induced fluorescence: Insights from global scale variations. Glob Change Biol. Accepted Author Manuscript. doi:10.1111/gcb.15373
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105752
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:02 Oct 2020 17:21
Last Modified:02 Oct 2020 17:21

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