DOI: 10.1038/ngeo1807
论文题名: A middle Eocene carbon cycle conundrum
作者: Sluijs A. ; Zeebe R.E. ; Bijl P.K. ; Bohaty S.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 6 起始页码: 429
结束页码: 434
语种: 英语
Scopus关键词: atmosphere-ocean system
; carbon cycle
; deep-sea sediment
; dissolution
; Eocene
; sea level change
; shelf sediment
; timescale
英文摘要: The Middle Eocene Climatic Optimum (MECO) was an approximately 500,000-year-long episode of widespread ocean-atmosphere warming about 40 million years ago, superimposed on a long-term middle Eocene cooling trend. It was marked by a rise in atmospheric CO2 concentrations, biotic changes and prolonged carbonate dissolution in the deep ocean. However, based on carbon cycle theory, a rise in atmospheric CO2 and warming should have enhanced continental weathering on timescales of the MECO. This should have in turn increased ocean carbonate mineral saturation state and carbonate burial in deep-sea sediments, rather than the recorded dissolution. We explore several scenarios using a carbon cycle model in an attempt to reconcile the data with theory, but these simulations confirm the problem. The model only produces critical MECO features when we invoke a sea-level rise, which redistributes carbonate burial from deep oceans to continental shelves and decreases shelf sediment weathering. Sufficient field data to assess this scenario is currently lacking. We call for an integrated approach to unravel Earth system dynamics during carbon cycle variations that are of intermediate timescales (several hundreds of thousands of years), such as the MECO. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106775
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands; School of Ocean and Earth Science and Technology, Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI 96822, United States; Ocean and Earth Science, National Oceanography Centre, University of Southampton, European Way, SO14 3ZH, Southampton, United Kingdom
Recommended Citation:
Sluijs A.,Zeebe R.E.,Bijl P.K.,et al. A middle Eocene carbon cycle conundrum[J]. Nature Geoscience,2013-01-01,6(6)