气候变化领域集成服务门户(CCPortal): Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise

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DOI	10.1038/s41561-019-0473-9
	Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise
	Moy A.D.; Palmer M.R.; Howard W.R.; Bijma J.; Cooper M.J.; Calvo E.; Pelejero C.; Gagan M.K.; Chalk T.B.
发表日期	2019
ISSN	17520894
卷号	12 期号:12
英文摘要	Glacial–interglacial changes in atmospheric CO2 are generally attributed to changes in seawater carbon chemistry in response to large-scale shifts in the ocean’s biogeochemistry and general circulation. The Southern Ocean currently takes up more CO2 than any other and it is likely to have played a crucial role in regulating past atmospheric CO2. However, the physical, biological and chemical variables that control ocean–atmosphere CO2 exchange during glacial–interglacial cycles are not completely understood. Here we use boron isotopes and carbon isotopes in planktonic foraminifera and an alkenone-based proxy of temperature to reconstruct seawater pH and CO2 partial pressure in sub-Antarctic surface waters south of Tasmania over the past 25,000 years, and investigate the mechanisms that regulate seawater CO2. The new record shows that surface waters in this region were a sink for atmospheric CO2 during the Last Glacial Maximum. Our reconstruction suggests changes in the strength of the biological pump and the release of deep-ocean CO2 to surface waters contributed to the last deglacial rise in atmospheric CO2. These findings demonstrate that variations in upwelling intensity and the distribution of Southern Ocean water masses in this sector played a key role in regulating atmospheric CO2 during the last glacial–interglacial cycle. © 2019, Crown.
语种	英语
scopus关键词	alkenone; biogeochemistry; biological pump; carbon cycle; deep sea; deglaciation; Last Glacial Maximum; partial pressure; planktonic foraminifera; reconstruction; seawater; Australia; Southern Ocean; Tasmania; Foraminifera
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124556
作者单位	Australian Antarctic Division, Kingston, TAS, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia; Ocean and Earth Science, University of Southampton, Southampton, United Kingdom; Climate Change Institute, The Australian National University, Canberra, Australian Capital Territory, Australia; Marine Biogeosciences, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany; ICM-CSIC, Institut de Ciències del Mar, Barcelona, Spain; ICREA, Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain; School of Earth and Environmental Sciences, The University of Queensland, Brisbane, QLD, Australia; Research School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory, Australia
推荐引用方式 GB/T 7714	Moy A.D.,Palmer M.R.,Howard W.R.,et al. Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise[J],2019,12(12).
APA	Moy A.D..,Palmer M.R..,Howard W.R..,Bijma J..,Cooper M.J..,...&Chalk T.B..(2019).Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise.Nature Geoscience,12(12).
MLA	Moy A.D.,et al."Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise".Nature Geoscience 12.12(2019).