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DOI10.1088/0004-637X/766/2/133
ON THE EFFECTS OF THE EVOLUTION OF MICROBIAL MATS AND LAND PLANTS ON THE EARTH AS A PLANET. PHOTOMETRIC AND SPECTROSCOPIC LIGHT CURVES OF PALEO-EARTHS
Sanroma, E.1,2; Palle, E.1,2; Garcia Munoz, A.1,2
通讯作者Sanroma, E.
来源期刊ASTROPHYSICAL JOURNAL
ISSN0004-637X
出版年2013
卷号766期号:2
英文摘要

Understanding the spectral and photometric variability of the Earth and the rest of the solar system planets has become of utmost importance for the future characterization of rocky exoplanets. As this is not only interesting at present times but also along the planetary evolution, we studied the effect that the evolution of microbial mats and plants over land has had on the way our planet looks from afar. As life evolved, continental surfaces changed gradually and non-uniformly from deserts through microbial mats to land plants, modifying the reflective properties of the ground and most likely the distribution of moisture and cloudiness. Here, we used a radiative transfer model of the Earth, together with geological paleo-records of the continental distribution and a reconstructed cloud distribution, to simulate the visible and near-IR radiation reflected by our planet as a function of Earth’s rotation. We found that the evolution from deserts to microbial mats and to land plants produces detectable changes in the globally averaged Earth’s reflectance. The variability of each surface type is located in different bands and can induce reflectance changes of up to 40% in period of hours. We conclude that by using photometric observations of an Earth-like planet at different photometric bands it would be possible to discriminate between different surface types. While recent literature proposes the red-edge feature of vegetation near 0.7 mu m as a signature for land plants, observations in near-IR bands can be equally or even better suited for this purpose.


英文关键词astrobiology Earth planets and satellites: atmospheres planets and satellites: surfaces radiative transfer
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000316320900067
WOS关键词DISK-AVERAGED SPECTRA ; VEGETATION SIGNATURE ; EXTRASOLAR PLANETS ; HABITABLE ZONE ; LUNAR ECLIPSE ; RED-EDGE ; VARIABILITY ; ATMOSPHERE ; STAR ; PHOTOSYNTHESIS
WOS类目Astronomy & Astrophysics
WOS研究方向Astronomy & Astrophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/175959
作者单位1.Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain;
2.Univ La Laguna, Dept Astrofis, E-38206 San Cristobal la Laguna, Spain
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Sanroma, E.,Palle, E.,Garcia Munoz, A.. ON THE EFFECTS OF THE EVOLUTION OF MICROBIAL MATS AND LAND PLANTS ON THE EARTH AS A PLANET. PHOTOMETRIC AND SPECTROSCOPIC LIGHT CURVES OF PALEO-EARTHS[J],2013,766(2).
APA Sanroma, E.,Palle, E.,&Garcia Munoz, A..(2013).ON THE EFFECTS OF THE EVOLUTION OF MICROBIAL MATS AND LAND PLANTS ON THE EARTH AS A PLANET. PHOTOMETRIC AND SPECTROSCOPIC LIGHT CURVES OF PALEO-EARTHS.ASTROPHYSICAL JOURNAL,766(2).
MLA Sanroma, E.,et al."ON THE EFFECTS OF THE EVOLUTION OF MICROBIAL MATS AND LAND PLANTS ON THE EARTH AS A PLANET. PHOTOMETRIC AND SPECTROSCOPIC LIGHT CURVES OF PALEO-EARTHS".ASTROPHYSICAL JOURNAL 766.2(2013).
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