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Detecting the terrestrial vegetation while observing Earth as a single dot

Published online by Cambridge University Press:  28 May 2003

Claude Aime ,
Rémi Soummer ,
L. Arnold ,
S. Gillet ,
O. Lardière ,
P. Riaud  and
J. Schneider
L. Arnold
Affiliation:
OHP, CNRS, 04870 Saint-Michel-l'Observatoire, France
S. Gillet
Affiliation:
OHP, CNRS, 04870 Saint-Michel-l'Observatoire, France
O. Lardière
Affiliation:
OHP, CNRS, 04870 Saint-Michel-l'Observatoire, France
P. Riaud
Affiliation:
LISE CNRS 04870 Saint-Michel-l'Observatoire, and LESIA CNRS Observatoire de Paris-Meudon, Place Jules Janssen, 92195 Meudon Cedex, France
J. Schneider
Affiliation:
LUTH CNRS Observatoire de Paris-Meudon, Place Jules Janssen, 92195 Meudon Cedex, France
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Abstract

Spectroscopic observations of the Earthshine allowed us to make arelative measurement of the integrated Earth reflectance spectrumin which the terrestrial vegetation signature around λ = 700 nm has been detected. Therefore we conclude that the terrestrialvegetation, and thus terrestrial life, can be detected remotelywhen the Earth is seen as a single dot. We also conclude thatvegetation can be detected on an extrasolar Earth-like planet, ifa spectral resolution around 50 is available.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 8: Astronomy with High Contrast Imaging , 2003 , pp. 17 - 24
Copyright
© EAS, EDP Sciences, 2003

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