Moisture availability mediates the relationship between terrestrial gross primary production and solar-induced chlorophyll fluorescence: Insights from global-scale variations
Abstract
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 modeled from climate variables using a machine learning (random forest) framework, which can improve the modeling 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 modeling of the relationshipmore »
- Authors:
-
- Colorado State Univ., Fort Collins, CO (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of New Hampshire, Durham, NH (United States)
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1831693
- Alternate Identifier(s):
- OSTI ID: 1804920
- Grant/Contract Number:
- AC05-00OR22725; 4000167205; NNX16AG61G; DE‐AC05‐00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Global Change Biology
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 6; Journal ID: ISSN 1354-1013
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; fluorescence escaping ratio; gross primary production (GPP); moisture stress; random forest; solar-induced chlorophyll fluorescence (SIF); stomatal openness
Citation Formats
Chen, Anping, Mao, Jiafu, Ricciuto, Daniel, Xiao, Jingfeng, Frankenberg, Christian, Li, Xing, Thornton, Peter E., Gu, Lianhong, and Knapp, Alan K. Moisture availability mediates the relationship between terrestrial gross primary production and solar-induced chlorophyll fluorescence: Insights from global-scale variations. United States: N. p., 2020.
Web. doi:10.1111/gcb.15373.
Chen, Anping, Mao, Jiafu, Ricciuto, Daniel, Xiao, Jingfeng, Frankenberg, Christian, Li, Xing, Thornton, Peter E., Gu, Lianhong, & Knapp, Alan K. Moisture availability mediates the relationship between terrestrial gross primary production and solar-induced chlorophyll fluorescence: Insights from global-scale variations. United States. https://doi.org/10.1111/gcb.15373
Chen, Anping, Mao, Jiafu, Ricciuto, Daniel, Xiao, Jingfeng, Frankenberg, Christian, Li, Xing, Thornton, Peter E., Gu, Lianhong, and Knapp, Alan K. Thu .
"Moisture availability mediates the relationship between terrestrial gross primary production and solar-induced chlorophyll fluorescence: Insights from global-scale variations". United States. https://doi.org/10.1111/gcb.15373. https://www.osti.gov/servlets/purl/1831693.
@article{osti_1831693,
title = {Moisture availability mediates the relationship between terrestrial gross primary production and solar-induced chlorophyll fluorescence: Insights from global-scale variations},
author = {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.},
abstractNote = {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 modeled from climate variables using a machine learning (random forest) framework, which can improve the modeling 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 modeling of the relationship between SIF and GPP over broad scales.},
doi = {10.1111/gcb.15373},
journal = {Global Change Biology},
number = 6,
volume = 27,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 2020},
month = {Thu Oct 01 00:00:00 EDT 2020}
}
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