Earth's oxygen and phosphorus cycle and the evolution of animal life
The purpose of this study is to reconstruct an environmental context for the emergence and expansion of early animal life during the Middle Proterozoic (∼1.8–0.8 billion years ago). Specifically, we examined the spatially and temporally evolving Earth surface ocean oxygen (O2) concentration impacted...
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Georgia Institute of Technology
2018
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ftgeorgiatech:oai:smartech.gatech.edu:1853/60364 2023-05-15T18:18:24+02:00 Earth's oxygen and phosphorus cycle and the evolution of animal life Liu, Xinyi Reinhard, Christopher T. Earth and Atmospheric Sciences 2018-08-20T19:10:53Z application/pdf http://hdl.handle.net/1853/60364 en_US eng Georgia Institute of Technology http://hdl.handle.net/1853/60364 Earth system modelling biogeochemical cycles animal evolution Proterozoic Text Undergraduate Thesis 2018 ftgeorgiatech 2022-12-12T18:37:15Z The purpose of this study is to reconstruct an environmental context for the emergence and expansion of early animal life during the Middle Proterozoic (∼1.8–0.8 billion years ago). Specifically, we examined the spatially and temporally evolving Earth surface ocean oxygen (O2) concentration impacted by atmospheric partial pressure of oxygen (pO2) and phosphorus levels. We exploited a quantitative biogeochemical model - the Grid ENabled Integrated Earth system (cGENIE) model, which consists of a reduced physics 3-D ocean circulation model coupled to a 2-D energy-moisture balance model of the atmosphere and a dynamic-thermodynamic sea-ice model. Our results suggest a challenging evolutionary landscape for basal metazoan life characterized by spatiotemporal variation in surface ocean oxygen level and prevalent benthic anoxia even with surface ocean-atmosphere oxygen level sufficient to support basal biological activities. By studying the environmental variability presented during the evolutionary history of complex life on Earth, we are thus equipped with a valuable tool to examine the potential biotic complexity throughout the universe. Undergraduate Bachelor Thesis Sea ice Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech |
institution |
Open Polar |
collection |
Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech |
op_collection_id |
ftgeorgiatech |
language |
English |
topic |
Earth system modelling biogeochemical cycles animal evolution Proterozoic |
spellingShingle |
Earth system modelling biogeochemical cycles animal evolution Proterozoic Liu, Xinyi Earth's oxygen and phosphorus cycle and the evolution of animal life |
topic_facet |
Earth system modelling biogeochemical cycles animal evolution Proterozoic |
description |
The purpose of this study is to reconstruct an environmental context for the emergence and expansion of early animal life during the Middle Proterozoic (∼1.8–0.8 billion years ago). Specifically, we examined the spatially and temporally evolving Earth surface ocean oxygen (O2) concentration impacted by atmospheric partial pressure of oxygen (pO2) and phosphorus levels. We exploited a quantitative biogeochemical model - the Grid ENabled Integrated Earth system (cGENIE) model, which consists of a reduced physics 3-D ocean circulation model coupled to a 2-D energy-moisture balance model of the atmosphere and a dynamic-thermodynamic sea-ice model. Our results suggest a challenging evolutionary landscape for basal metazoan life characterized by spatiotemporal variation in surface ocean oxygen level and prevalent benthic anoxia even with surface ocean-atmosphere oxygen level sufficient to support basal biological activities. By studying the environmental variability presented during the evolutionary history of complex life on Earth, we are thus equipped with a valuable tool to examine the potential biotic complexity throughout the universe. Undergraduate |
author2 |
Reinhard, Christopher T. Earth and Atmospheric Sciences |
format |
Bachelor Thesis |
author |
Liu, Xinyi |
author_facet |
Liu, Xinyi |
author_sort |
Liu, Xinyi |
title |
Earth's oxygen and phosphorus cycle and the evolution of animal life |
title_short |
Earth's oxygen and phosphorus cycle and the evolution of animal life |
title_full |
Earth's oxygen and phosphorus cycle and the evolution of animal life |
title_fullStr |
Earth's oxygen and phosphorus cycle and the evolution of animal life |
title_full_unstemmed |
Earth's oxygen and phosphorus cycle and the evolution of animal life |
title_sort |
earth's oxygen and phosphorus cycle and the evolution of animal life |
publisher |
Georgia Institute of Technology |
publishDate |
2018 |
url |
http://hdl.handle.net/1853/60364 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
http://hdl.handle.net/1853/60364 |
_version_ |
1766194967006412800 |