Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusm.a21a..05s&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #A21A-05
Physics
0300 Atmospheric Composition And Structure
Scientific paper
Earth's deciduous plants have a sharp order-of-magnitude increase in leaf reflectance between approximately 700 and 750 nm wavelength. This strong reflectance of Earth's vegetation suggests that surface biosignatures with sharp spectral features might be detectable in the spectrum of scattered light from a spatially unresolved extrasolar terrestrial planet. We assess the potential of Earth's step-function-like spectroscopic feature, referred to as the "red edge," as a tool for the search for biomarkers. We point out that some mineral reflectance edges are similar in slope and strength to vegetation's red edge (albeit at different wavelengths). We review extrasolar terrestrial planet models and the case for detection of extrasolar plants.
Ford Eric B.
Seager Sara
Turner Edwin L.
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