Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral Imager
Abstract Solar‐induced fluorescence (SIF) is a proxy of ecosystem photosynthesis that often scales linearly with gross primary productivity (GPP) at the canopy scale. However, the mechanistic relationship between GPP and SIF is still uncertain, especially at smaller temporal and spatial scales. We d...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2023GL107429 |
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| author | Sophie Ruehr Cynthia Gerlein‐Safdi Nicola Falco Paul O. Seibert Chunwei Chou Loren Albert Trevor F. Keenan |
| author_facet | Sophie Ruehr Cynthia Gerlein‐Safdi Nicola Falco Paul O. Seibert Chunwei Chou Loren Albert Trevor F. Keenan |
| author_sort | Sophie Ruehr |
| collection | DOAJ |
| description | Abstract Solar‐induced fluorescence (SIF) is a proxy of ecosystem photosynthesis that often scales linearly with gross primary productivity (GPP) at the canopy scale. However, the mechanistic relationship between GPP and SIF is still uncertain, especially at smaller temporal and spatial scales. We deployed a ultra‐hyperspectral imager over two grassland sites in California throughout a soil moisture dry down. The imager has high spatial resolution that limits mixed pixels, enabling differentiation between plants and leaves within one scene. We find that imager SIF correlates well with diurnal changes in leaf‐level physiology and gross primary productivity under well‐watered conditions. These relationships deteriorate throughout the dry down event. Our results demonstrate an advancement in SIF imaging with new possibilities in remotely sensing plant canopies from the leaf to the ecosystem. These data can be used to resolve outstanding questions regarding SIF's meaning and usefulness in terrestrial ecosystem monitoring. |
| format | Article |
| id | doaj-art-80fb4b77d12e4105a96d1f5e7eaa3f19 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-80fb4b77d12e4105a96d1f5e7eaa3f192025-08-20T03:49:46ZengWileyGeophysical Research Letters0094-82761944-80072024-07-015114n/an/a10.1029/2023GL107429Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral ImagerSophie Ruehr0Cynthia Gerlein‐Safdi1Nicola Falco2Paul O. Seibert3Chunwei Chou4Loren Albert5Trevor F. Keenan6Department of Environmental Science, Policy & Management UC Berkeley Berkeley CA USAClimate & Ecosystem Sciences Division Lawrence Berkeley National Laboratory Berkeley CA USAClimate & Ecosystem Sciences Division Lawrence Berkeley National Laboratory Berkeley CA USAClimate & Ecosystem Sciences Division Lawrence Berkeley National Laboratory Berkeley CA USAClimate & Ecosystem Sciences Division Lawrence Berkeley National Laboratory Berkeley CA USADepartment of Forest Ecosystems & Society Oregon State University Corvallis OR USADepartment of Environmental Science, Policy & Management UC Berkeley Berkeley CA USAAbstract Solar‐induced fluorescence (SIF) is a proxy of ecosystem photosynthesis that often scales linearly with gross primary productivity (GPP) at the canopy scale. However, the mechanistic relationship between GPP and SIF is still uncertain, especially at smaller temporal and spatial scales. We deployed a ultra‐hyperspectral imager over two grassland sites in California throughout a soil moisture dry down. The imager has high spatial resolution that limits mixed pixels, enabling differentiation between plants and leaves within one scene. We find that imager SIF correlates well with diurnal changes in leaf‐level physiology and gross primary productivity under well‐watered conditions. These relationships deteriorate throughout the dry down event. Our results demonstrate an advancement in SIF imaging with new possibilities in remotely sensing plant canopies from the leaf to the ecosystem. These data can be used to resolve outstanding questions regarding SIF's meaning and usefulness in terrestrial ecosystem monitoring.https://doi.org/10.1029/2023GL107429solar‐induced fluorescencehyperspectral imagingplant physiologycarbon cycleremote sensing |
| spellingShingle | Sophie Ruehr Cynthia Gerlein‐Safdi Nicola Falco Paul O. Seibert Chunwei Chou Loren Albert Trevor F. Keenan Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral Imager Geophysical Research Letters solar‐induced fluorescence hyperspectral imaging plant physiology carbon cycle remote sensing |
| title | Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral Imager |
| title_full | Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral Imager |
| title_fullStr | Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral Imager |
| title_full_unstemmed | Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral Imager |
| title_short | Quantifying Seasonal and Diurnal Cycles of Solar‐Induced Fluorescence With a Novel Hyperspectral Imager |
| title_sort | quantifying seasonal and diurnal cycles of solar induced fluorescence with a novel hyperspectral imager |
| topic | solar‐induced fluorescence hyperspectral imaging plant physiology carbon cycle remote sensing |
| url | https://doi.org/10.1029/2023GL107429 |
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