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  New global observations of the terrestrial carbon cycle from GOSAT: Patterns of plant fluorescence with gross primary productivity

Frankenberg, C., Fisher, J. B., Worden, J., Badgley, G., Saatchi, S. S., Lee, J. E., et al. (2011). New global observations of the terrestrial carbon cycle from GOSAT: Patterns of plant fluorescence with gross primary productivity. Geophysical Research Letters, 38, L17706. doi:10.1029/2011gl048738.

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 Urheber:
Frankenberg, C., Autor
Fisher, J. B., Autor
Worden, J., Autor
Badgley, G., Autor
Saatchi, S. S., Autor
Lee, J. E., Autor
Toon, G. C., Autor
Butz, A., Autor
Jung, M.1, Autor           
Kuze, A., Autor
Yokota, T., Autor
Affiliations:
1Research Group Biogeochemical Model-data Integration, Dr. M. Reichstein, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497760              

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Schlagwörter: net primary production fourier-transform spectrometer gases observing satellite sun-induced fluorescence chlorophyll fluorescence photosynthesis climate model leaf efficiency
 Zusammenfassung: Our ability to close the Earth's carbon budget and predict feedbacks in a warming climate depends critically on knowing where, when and how carbon dioxide is exchanged between the land and atmosphere. Terrestrial gross primary production (GPP) constitutes the largest flux component in the global carbon budget, however significant uncertainties remain in GPP estimates and its seasonality. Empirically, we show that global spaceborne observations of solar induced chlorophyll fluorescence - occurring during photosynthesis - exhibit a strong linear correlation with GPP. We found that the fluorescence emission even without any additional climatic or model information has the same or better predictive skill in estimating GPP as those derived from traditional remotely-sensed vegetation indices using ancillary data and model assumptions. In boreal summer the generally strong linear correlation between fluorescence and GPP models weakens, attributable to discrepancies in savannas/croplands (18-48% higher fluorescence-based GPP derived by simple linear scaling), and high-latitude needleleaf forests (28-32% lower fluorescence). Our results demonstrate that retrievals of chlorophyll fluorescence provide direct global observational constraints for GPP and open an entirely new viewpoint on the global carbon cycle. We anticipate that global fluorescence data in combination with consolidated plant physiological fluorescence models will be a step-change in carbon cycle research and enable an unprecedented robustness in the understanding of the current and future carbon cycle. Citation: Frankenberg, C., et al. (2011), New global observations of the terrestrial carbon cycle from GOSAT: Patterns of plant fluorescence with gross primary productivity, Geophys. Res. Lett., 38, L17706, doi: 10.1029/2011GL048738.

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Sprache(n): eng - English
 Datum: 2011
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1029/2011gl048738
ISI: ://WOS:000295135000002
Anderer: BGC1540
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Titel: Geophysical Research Letters
  Kurztitel : GRL
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : American Geophysical Union
Seiten: - Band / Heft: 38 Artikelnummer: - Start- / Endseite: L17706 Identifikator: ISSN: 0094-8276
CoNE: https://pure.mpg.de/cone/journals/resource/954925465217