GSTDTAP  > 地球科学
DOI10.1038/s41561-017-0031-2
Effects of primitive photosynthesis on Earth's early climate system
Ozaki, Kazumi1,2,3; Tajika, Eiichi4; Hong, Peng K.5; Nakagawa, Yusuke6; Reinhard, Christopher T.1,2
2018
发表期刊NATURE GEOSCIENCE
ISSN1752-0894
EISSN1752-0908
出版年2018
卷号11期号:1页码:55-+
文章类型Article
语种英语
国家USA; Japan
英文摘要

The evolution of different forms of photosynthetic life has profoundly altered the activity level of the biosphere, radically reshaping the composition of Earth's oceans and atmosphere over time. However, the mechanistic impacts of a primitive photosynthetic biosphere on Earth's early atmospheric chemistry and climate are poorly understood. Here, we use a global redox balance model to explore the biogeochemical and climatological effects of different forms of primitive photosynthesis. We find that a hybrid ecosystem of H-2-based and Fe2+-based anoxygenic photoautotrophs-organisms that perform photosynthesis without producing oxygen-gives rise to a strong nonlinear amplification of Earth's methane (CH4) cycle, and would thus have represented a critical component of Earth's early climate system before the advent of oxygenic photosynthesis. Using a Monte Carlo approach, we find that a hybrid photosynthetic biosphere widens the range of geochemical conditions that allow for warm climate states well beyond either of these metabolic processes acting in isolation. Our results imply that the Earth's early climate was governed by a novel and poorly explored set of regulatory feedbacks linking the anoxic biosphere and the coupled H, C and Fe cycles. We suggest that similar processes should be considered when assessing the potential for sustained habitability on Earth-like planets with reducing atmospheres.


领域地球科学 ; 气候变化
收录类别SCI-E
WOS记录号WOS:000423842000019
WOS关键词ATMOSPHERIC CO2 ; ORGANIC-CARBON ; GREENHOUSE ; METHANE ; EVOLUTION ; TEMPERATURE ; LUMINOSITY ; BIOSPHERE ; OXIDATION ; HISTORY
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/34842
专题地球科学
气候变化
作者单位1.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA;
2.NASA, Astrobiol Inst, Alternat Earths Team, Mountain View, CA 94043 USA;
3.NASA, Postdoctoral Program, Univ Space Res Assoc, Columbia, MD 21046 USA;
4.Univ Tokyo, Dept Earth & Planetary Sci, Grad Sch Sci, Bunkyo Ku, Tokyo, Japan;
5.Univ Tokyo, Dept Syst Innovat, Sch Engn, Bunkyo Ku, Tokyo, Japan;
6.Hitachi Power Solut Co Ltd, Anal Engn Dept, Hitachi, Ibaraki, Japan
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GB/T 7714
Ozaki, Kazumi,Tajika, Eiichi,Hong, Peng K.,et al. Effects of primitive photosynthesis on Earth's early climate system[J]. NATURE GEOSCIENCE,2018,11(1):55-+.
APA Ozaki, Kazumi,Tajika, Eiichi,Hong, Peng K.,Nakagawa, Yusuke,&Reinhard, Christopher T..(2018).Effects of primitive photosynthesis on Earth's early climate system.NATURE GEOSCIENCE,11(1),55-+.
MLA Ozaki, Kazumi,et al."Effects of primitive photosynthesis on Earth's early climate system".NATURE GEOSCIENCE 11.1(2018):55-+.
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