Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance
Photosynthesis is essential for life on earth as it, inter alia, influences the composition of the atmosphere and is the driving mechanism of primary production. Photosynthesis is particularly controlled by leaf pigments such as chlorophyll, carotenoids or anthocyanins. Incoming solar radiation is mainly captured by chlorophyll, whereas plant organs are also protected from excess radiation by carotenoids and anthocyanins. Current and upcoming optical earth observation sensors are sensitive to these radiative processes and thus feature a high potential for mapping the spatial and temporal variation of these photosynthetic pigments. In the context of remote sensing, leaf pigments are either quantified as leaf area-based content [μg/cm2] or as leaf mass-based concentration [g/g or %]. However, these two metrics are fundamentally different, and until now there has been neither an in-depth discussion nor a consensus on which metric to choose. This is notable considering the amount of studies that do not explicitly differentiate between pigment content and concentration. We therefore seek to outline the differences between both metrics and thus show that the remote sensing of leaf pigment concentration [%] is unsubstantial. This is due to the fact that, firstly, pigment concentration is likely to primarily reflect variation in leaf mass per area and not pigments itself. Second, the radiative transfer in plant leaves is especially determined by the absolute content of pigments in a leaf and not its relative concentration to other leaf constituents. And third, as a ratio, pigment concentration is an ambiguous metric, which further complicates the quantification of leaf pigments at the canopy scale. Given these issues related to the use of chlorophyll concentration, we thus conclude that remote sensing of leaf pigments should be primarily performed on an area basis [μg/cm2].
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Format: | artículo biblioteca |
Langue: | English |
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Elsevier
2019-09-01
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Sujets: | Pigments, Chlorophylls, Carotenoids, Anthocyanins, Radiative transfer, Plant functioning, Plant health, Content, Concentration, Remote sensing, |
Accès en ligne: | http://hdl.handle.net/10261/205806 http://dx.doi.org/10.13039/501100002946 http://dx.doi.org/10.13039/501100002765 |
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dig-ias-es-10261-2058062021-09-01T04:30:39Z Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance Kattenborn, Teja Schiefer, Felix Zarco-Tejada, Pablo J. Schmidtlein, Sebastian German Centre for Air and Space Travel Federal Ministry of Economics and Technology (Germany) Pigments Chlorophylls Carotenoids Anthocyanins Radiative transfer Plant functioning Plant health Content Concentration Remote sensing Photosynthesis is essential for life on earth as it, inter alia, influences the composition of the atmosphere and is the driving mechanism of primary production. Photosynthesis is particularly controlled by leaf pigments such as chlorophyll, carotenoids or anthocyanins. Incoming solar radiation is mainly captured by chlorophyll, whereas plant organs are also protected from excess radiation by carotenoids and anthocyanins. Current and upcoming optical earth observation sensors are sensitive to these radiative processes and thus feature a high potential for mapping the spatial and temporal variation of these photosynthetic pigments. In the context of remote sensing, leaf pigments are either quantified as leaf area-based content [μg/cm2] or as leaf mass-based concentration [g/g or %]. However, these two metrics are fundamentally different, and until now there has been neither an in-depth discussion nor a consensus on which metric to choose. This is notable considering the amount of studies that do not explicitly differentiate between pigment content and concentration. We therefore seek to outline the differences between both metrics and thus show that the remote sensing of leaf pigment concentration [%] is unsubstantial. This is due to the fact that, firstly, pigment concentration is likely to primarily reflect variation in leaf mass per area and not pigments itself. Second, the radiative transfer in plant leaves is especially determined by the absolute content of pigments in a leaf and not its relative concentration to other leaf constituents. And third, as a ratio, pigment concentration is an ambiguous metric, which further complicates the quantification of leaf pigments at the canopy scale. Given these issues related to the use of chlorophyll concentration, we thus conclude that remote sensing of leaf pigments should be primarily performed on an area basis [μg/cm2]. The project was funded by the German Aerospace Center (DLR) on behalf of the Federal Ministry of Economics and Technology (BMWi), FKZ50EE 1347. Peer reviewed 2020-03-30T11:36:09Z 2020-03-30T11:36:09Z 2019-09-01 artículo http://purl.org/coar/resource_type/c_6501 Remote Sensing of Environment 230: 111195 (2019) 0034-4257 http://hdl.handle.net/10261/205806 10.1016/j.rse.2019.05.014 http://dx.doi.org/10.13039/501100002946 http://dx.doi.org/10.13039/501100002765 en Postprint https://doi.org/10.1016/j.rse.2019.05.014 Sí open Elsevier |
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Pigments Chlorophylls Carotenoids Anthocyanins Radiative transfer Plant functioning Plant health Content Concentration Remote sensing Pigments Chlorophylls Carotenoids Anthocyanins Radiative transfer Plant functioning Plant health Content Concentration Remote sensing |
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Pigments Chlorophylls Carotenoids Anthocyanins Radiative transfer Plant functioning Plant health Content Concentration Remote sensing Pigments Chlorophylls Carotenoids Anthocyanins Radiative transfer Plant functioning Plant health Content Concentration Remote sensing Kattenborn, Teja Schiefer, Felix Zarco-Tejada, Pablo J. Schmidtlein, Sebastian Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance |
description |
Photosynthesis is essential for life on earth as it, inter alia, influences the composition of the atmosphere and is the driving mechanism of primary production. Photosynthesis is particularly controlled by leaf pigments such as chlorophyll, carotenoids or anthocyanins. Incoming solar radiation is mainly captured by chlorophyll, whereas plant organs are also protected from excess radiation by carotenoids and anthocyanins. Current and upcoming optical earth observation sensors are sensitive to these radiative processes and thus feature a high potential for mapping the spatial and temporal variation of these photosynthetic pigments. In the context of remote sensing, leaf pigments are either quantified as leaf area-based content [μg/cm2] or as leaf mass-based concentration [g/g or %]. However, these two metrics are fundamentally different, and until now there has been neither an in-depth discussion nor a consensus on which metric to choose. This is notable considering the amount of studies that do not explicitly differentiate between pigment content and concentration. We therefore seek to outline the differences between both metrics and thus show that the remote sensing of leaf pigment concentration [%] is unsubstantial. This is due to the fact that, firstly, pigment concentration is likely to primarily reflect variation in leaf mass per area and not pigments itself. Second, the radiative transfer in plant leaves is especially determined by the absolute content of pigments in a leaf and not its relative concentration to other leaf constituents. And third, as a ratio, pigment concentration is an ambiguous metric, which further complicates the quantification of leaf pigments at the canopy scale. Given these issues related to the use of chlorophyll concentration, we thus conclude that remote sensing of leaf pigments should be primarily performed on an area basis [μg/cm2]. |
author2 |
German Centre for Air and Space Travel |
author_facet |
German Centre for Air and Space Travel Kattenborn, Teja Schiefer, Felix Zarco-Tejada, Pablo J. Schmidtlein, Sebastian |
format |
artículo |
topic_facet |
Pigments Chlorophylls Carotenoids Anthocyanins Radiative transfer Plant functioning Plant health Content Concentration Remote sensing |
author |
Kattenborn, Teja Schiefer, Felix Zarco-Tejada, Pablo J. Schmidtlein, Sebastian |
author_sort |
Kattenborn, Teja |
title |
Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance |
title_short |
Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance |
title_full |
Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance |
title_fullStr |
Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance |
title_full_unstemmed |
Advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance |
title_sort |
advantages of retrieving pigment content [μg/cm2] versus concentration [%] from canopy reflectance |
publisher |
Elsevier |
publishDate |
2019-09-01 |
url |
http://hdl.handle.net/10261/205806 http://dx.doi.org/10.13039/501100002946 http://dx.doi.org/10.13039/501100002765 |
work_keys_str_mv |
AT kattenbornteja advantagesofretrievingpigmentcontentmgcm2versusconcentrationfromcanopyreflectance AT schieferfelix advantagesofretrievingpigmentcontentmgcm2versusconcentrationfromcanopyreflectance AT zarcotejadapabloj advantagesofretrievingpigmentcontentmgcm2versusconcentrationfromcanopyreflectance AT schmidtleinsebastian advantagesofretrievingpigmentcontentmgcm2versusconcentrationfromcanopyreflectance |
_version_ |
1777663251095486464 |