Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency

Matti Mõttus, Juho Aalto, Luiz Aragao, Jaana Bäck, Rocio Hernández-Clemente, Eduardo Eiji Maeda, Vincent Markiet, Caroline J. Nichol, Raimundo Cosme Oliveira, Natalia Restrepo-Coupe, Scott R. Saleska

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKonferenssiartikkeliTieteellinenvertaisarvioitu

Kuvaus

The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.
Alkuperäiskielienglanti
Otsikko2018 IEEE International Geoscience & Remote Sensing Symposium : Observing, Understanding And Forecasting The Dynamics Of Our Planet
Sivumäärä4
KustantajaInstitute of Electrical and Electronics Engineers
Julkaisupäivämarraskuuta 2018
Sivut9007-9010
ISBN (painettu)978-1-5386-7151-1
ISBN (elektroninen)978-1-5386-7150-4 , 978-1-5386-7149-8
DOI - pysyväislinkit
TilaJulkaistu - marraskuuta 2018
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
Tapahtuma38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS) - Valencia, Espanja
Kesto: 22 heinäkuuta 201827 heinäkuuta 2018

Julkaisusarja

NimiIEEE International Geoscience and Remote Sensing Symposium proceedings
KustantajaIEEE
ISSN (painettu)2153-6996
ISSN (elektroninen)2153-7003

Tieteenalat

  • 1171 Geotieteet
  • 1172 Ympäristötiede

Lainaa tätä

Mõttus, M., Aalto, J., Aragao, L., Bäck, J., Hernández-Clemente, R., Maeda, E. E., ... Saleska, S. R. (2018). Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency. teoksessa 2018 IEEE International Geoscience & Remote Sensing Symposium: Observing, Understanding And Forecasting The Dynamics Of Our Planet (Sivut 9007-9010). (IEEE International Geoscience and Remote Sensing Symposium proceedings). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/IGARSS.2018.8517554
Mõttus, Matti ; Aalto, Juho ; Aragao, Luiz ; Bäck, Jaana ; Hernández-Clemente, Rocio ; Maeda, Eduardo Eiji ; Markiet, Vincent ; Nichol, Caroline J. ; Oliveira, Raimundo Cosme ; Restrepo-Coupe, Natalia ; Saleska, Scott R. / Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency. 2018 IEEE International Geoscience & Remote Sensing Symposium: Observing, Understanding And Forecasting The Dynamics Of Our Planet. Institute of Electrical and Electronics Engineers, 2018. Sivut 9007-9010 (IEEE International Geoscience and Remote Sensing Symposium proceedings).
@inproceedings{8c55c2a32dfb4134a892e0dd82fc9129,
title = "Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency",
abstract = "The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.",
keywords = "Photochemical Reflectance Index, Light Use Efficiency, Boreal forest, Amazon rainforest, Pinus sylvestris, Betula Pendula, Manilkara data, MULTIPLE DRIVERS, SEASONAL-CHANGE, PHOTOSYNTHESIS, INDEX, 1171 Geosciences, 1172 Environmental sciences",
author = "Matti M{\~o}ttus and Juho Aalto and Luiz Aragao and Jaana B{\"a}ck and Rocio Hern{\'a}ndez-Clemente and Maeda, {Eduardo Eiji} and Vincent Markiet and Nichol, {Caroline J.} and Oliveira, {Raimundo Cosme} and Natalia Restrepo-Coupe and Saleska, {Scott R.}",
year = "2018",
month = "11",
doi = "10.1109/IGARSS.2018.8517554",
language = "English",
isbn = "978-1-5386-7151-1",
series = "IEEE International Geoscience and Remote Sensing Symposium proceedings",
publisher = "Institute of Electrical and Electronics Engineers",
pages = "9007--9010",
booktitle = "2018 IEEE International Geoscience & Remote Sensing Symposium",
address = "United States",

}

Mõttus, M, Aalto, J, Aragao, L, Bäck, J, Hernández-Clemente, R, Maeda, EE, Markiet, V, Nichol, CJ, Oliveira, RC, Restrepo-Coupe, N & Saleska, SR 2018, Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency. julkaisussa 2018 IEEE International Geoscience & Remote Sensing Symposium: Observing, Understanding And Forecasting The Dynamics Of Our Planet. IEEE International Geoscience and Remote Sensing Symposium proceedings, Institute of Electrical and Electronics Engineers, Sivut 9007-9010, 38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Valencia, Espanja, 22/07/2018. https://doi.org/10.1109/IGARSS.2018.8517554

Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency. / Mõttus, Matti; Aalto, Juho; Aragao, Luiz; Bäck, Jaana; Hernández-Clemente, Rocio; Maeda, Eduardo Eiji; Markiet, Vincent; Nichol, Caroline J.; Oliveira, Raimundo Cosme; Restrepo-Coupe, Natalia; Saleska, Scott R.

2018 IEEE International Geoscience & Remote Sensing Symposium: Observing, Understanding And Forecasting The Dynamics Of Our Planet. Institute of Electrical and Electronics Engineers, 2018. s. 9007-9010 (IEEE International Geoscience and Remote Sensing Symposium proceedings).

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKonferenssiartikkeliTieteellinenvertaisarvioitu

TY - GEN

T1 - Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency

AU - Mõttus, Matti

AU - Aalto, Juho

AU - Aragao, Luiz

AU - Bäck, Jaana

AU - Hernández-Clemente, Rocio

AU - Maeda, Eduardo Eiji

AU - Markiet, Vincent

AU - Nichol, Caroline J.

AU - Oliveira, Raimundo Cosme

AU - Restrepo-Coupe, Natalia

AU - Saleska, Scott R.

PY - 2018/11

Y1 - 2018/11

N2 - The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.

AB - The spectral properties of plant leaves reflect the state of their photosynthetic apparatus and the surrounding environment. A well-known mechanism of photosynthetic downregulation, active on the time scale from minutes to hours, is caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the Photochemical Reflectance Index (PRI). This index can thus be used to monitor the photosynthetic status of the vegetation canopy, potentially from a large distance, and allows for a global satellite-based monitoring of photosynthesis. Such Earth observation satellites in near polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and scale them to longer timescales, we measured the daily course of leaf PRI in two evergreen biomes: European boreal forest and Amazon rainforest. The daily course of PRI was different for the two locations. In Amazon, PRI was driven by incident Photosynthetic Photon Flux Density (PPFD). In the boreal location, PRI and PPFD were decoupled and PRI indicated downregulation only in the afternoon. This downregulation was confirmed with carbon exchange measurements. The study demonstrates the utility of biome-specific daily PRI curves for scaling instantaneous remote measurements to daily values and comparing data acquired at different times of day.

KW - Photochemical Reflectance Index

KW - Light Use Efficiency

KW - Boreal forest

KW - Amazon rainforest

KW - Pinus sylvestris

KW - Betula Pendula

KW - Manilkara data

KW - MULTIPLE DRIVERS

KW - SEASONAL-CHANGE

KW - PHOTOSYNTHESIS

KW - INDEX

KW - 1171 Geosciences

KW - 1172 Environmental sciences

U2 - 10.1109/IGARSS.2018.8517554

DO - 10.1109/IGARSS.2018.8517554

M3 - Conference contribution

SN - 978-1-5386-7151-1

T3 - IEEE International Geoscience and Remote Sensing Symposium proceedings

SP - 9007

EP - 9010

BT - 2018 IEEE International Geoscience & Remote Sensing Symposium

PB - Institute of Electrical and Electronics Engineers

ER -

Mõttus M, Aalto J, Aragao L, Bäck J, Hernández-Clemente R, Maeda EE et al. Implications of Diurnal Changes in Leaf PRI on Remote Measurements of Light Use Efficiency. julkaisussa 2018 IEEE International Geoscience & Remote Sensing Symposium: Observing, Understanding And Forecasting The Dynamics Of Our Planet. Institute of Electrical and Electronics Engineers. 2018. s. 9007-9010. (IEEE International Geoscience and Remote Sensing Symposium proceedings). https://doi.org/10.1109/IGARSS.2018.8517554