globalchange  > 气候减缓与适应
DOI: 10.1038/s41561-017-0031-2
论文题名:
Effects of primitive photosynthesis on Earth's early climate system
作者: Ozaki K.; Tajika E.; Hong P.K.; Nakagawa Y.; Reinhard C.T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2018
卷: 11, 期:1
起始页码: 55
结束页码: 59
语种: 英语
Scopus关键词: atmospheric chemistry ; biogeochemistry ; biosphere ; cation ; climatology ; early Earth ; hydrogen ; iron ; methane ; model ; Monte Carlo analysis ; photoautotrophy ; photosynthesis ; redox conditions
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 H2-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. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105638
Appears in Collections:气候减缓与适应
科学计划与规划

Files in This Item:

There are no files associated with this item.


作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; NASA Astrobiology Institute, Alternative Earths Team, Mountain View, CA, United States; NASA Postdoctoral Program, Universities Space Research Association, Columbia, MD, United States; Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan; Department of Systems Innovation, School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan; Analysis Engineering Department, Hitachi Power Solutions Co., Ltd., Hitachi-Shi, Ibaraki, Japan

Recommended Citation:
Ozaki K.,Tajika E.,Hong P.K.,et al. Effects of primitive photosynthesis on Earth's early climate system[J]. Nature Geoscience,2018-01-01,11(1)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Ozaki K.]'s Articles
[Tajika E.]'s Articles
[Hong P.K.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Ozaki K.]'s Articles
[Tajika E.]'s Articles
[Hong P.K.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Ozaki K.]‘s Articles
[Tajika E.]‘s Articles
[Hong P.K.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.