Data from: Systematic assessment of retrieval methods for canopy far-red solar-induced chlorophyll fluorescence (SIF) using automated high-frequency field spectroscopy
| dc.contributor.author | Chang, Christine Y. | |
| dc.contributor.author | Melkonian, Jeffrey | |
| dc.contributor.author | Riha, Susan J. | |
| dc.contributor.author | Frankenberg, Christian | |
| dc.contributor.author | Guanter, Luis | |
| dc.contributor.author | Gu, Lianhong | |
| dc.contributor.author | Sun, Ying | |
| dc.date.accessioned | 2020-03-30T21:10:44Z | |
| dc.date.available | 2020-03-30T21:10:44Z | |
| dc.date.issued | 2020 | |
| dc.description | Christine Y. Chang, Jeffrey Melkonian, Susan J. Riha, Christian Frankenberg, Luis Guanter, Lianhong Gu, Ying Sun. (2020) Data from: Systematic assessment of retrieval methods for canopy far-red solar-induced chlorophyll fluorescence (SIF) using automated high-frequency field spectroscopy. [dataset] Cornell University Library eCommons Repository. https://doi.org/10.7298/wqx5-ba07 | |
| dc.description.abstract | Data in support of the following research: Remote sensing of solar-induced chlorophyll fluorescence (SIF) offers potential to infer photosynthesis across scales and biomes. Many retrieval methods have been developed to estimate top-of-canopy SIF using ground-based spectroscopy. However, inconsistencies among methods may confound interpretation of SIF dynamics, eco-physiological/environmental drivers, and its relationship with photosynthesis. Using high temporal- and spectral-resolution ground-based spectroscopy, we aimed to 1) evaluate performance of SIF retrieval methods under diverse sky conditions using continuous field measurements; 2) assess method sensitivity to fluctuating light, reflectance and fluorescence emission spectra; and 3) inform users for optimal ground-based SIF retrieval. Analysis included field measurements from bi-hemispherical and hemispherical-conical systems and synthetic upwelling radiance constructed from measured downwelling radiance, simulated reflectance and simulated fluorescence for benchmarking. Fraunhofer-based differential optical absorption spectroscopy (DOAS) and singular vector decomposition (SVD) retrievals exhibit convergent SIF-PAR relationships and diurnal consistency across different sky conditions while O2A-based spectral fitting method (SFM), SVD, and modified Fraunhofer line discrimination (3FLD) exhibit divergent SIF-PAR relationships across sky conditions. Such behavior holds across system configurations, though hemispherical-conical systems diverge less across sky conditions. O2A retrieval accuracy, influenced by atmospheric distortion, improves with a narrower fitting window and when training SVD with temporally-local spectra. This may impact SIF-photosynthesis relationships interpreted by previous studies using O2A-based retrievals with standard (759-767.76 nm) fitting windows. Fraunhofer-based retrievals resist atmospheric impacts but are noisier and more sensitive to assumed SIF spectral shape than O2A-based retrievals. We recommend SVD or SFM using reduced fitting window (759.5-761.5 nm) for robust far-red SIF retrievals across sky conditions. | |
| dc.identifier.doi | https://doi.org/10.7298/wqx5-ba07 | |
| dc.identifier.uri | https://hdl.handle.net/1813/69711 | |
| dc.language.iso | en_US | en_US |
| dc.relation.isreferencedby | Chang C.Y., Guanter L., Frankenberg C., Köhler P., Gu L., Magney T.S., Grossmann K., Sun Y. (2020) Systematic assessment of retrieval methods for canopy far-red solar-induced chlorophyll fluorescence (SIF) using high-frequency automated field spectroscopy. Journal of Geophysical Research: Biogeosciences. 125:e2019JG005533 https://doi.org/10.1029/2019JG005533 | |
| dc.relation.isreferencedby | Christine Yao-Yun Chang. (2020). SunCornell/SIF_retrieval_methods: SIF_retrieval_methods (Version v1.0). [code] Zenodo. https://doi.org/10.5281/zenodo.3759965 | |
| dc.relation.isreferencedbyuri | https://doi.org/10.1029/2019JG005533 | |
| dc.rights | Attribution 4.0 International | * |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
| dc.subject | solar-induced chlorophyll fluorescence (SIF) | |
| dc.subject | assessment of retrieval methods | |
| dc.subject | field spectroscopy | |
| dc.title | Data from: Systematic assessment of retrieval methods for canopy far-red solar-induced chlorophyll fluorescence (SIF) using automated high-frequency field spectroscopy | en_US |
| dc.type | dataset | en_US |
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- Aurora2018_SIF.csv
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- 10.74 MB
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- measurements from SIF tower
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- ECtower_data.csv
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- 279.38 KB
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- SCOPE inputs measured from eddy covariance tower
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- canopy_height.csv
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- Comma-separated values
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- SCOPE optional input for canopy height
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- LAI.csv
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- 145 B
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- Comma-separated values
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- SCOPE optional input for leaf area index
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- JGR_RetrievalMethodsComparison_readme.txt
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- 7.96 KB
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- Plain Text
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