DOI: 10.1007/s00382-015-2646-6
Scopus记录号: 2-s2.0-84957441173
论文题名: Deglacial climate, carbon cycle and ocean chemistry changes in response to a terrestrial carbon release
作者: Simmons C.T. ; Matthews H.D. ; Mysak L.A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-03-04 起始页码: 1287
结束页码: 1299
语种: 英语
英文关键词: Alkalinity
; Carbon dioxide
; Deglacial carbon cycle
; Earth system modeling
; Glacial–interglacial change
; Permafrost
英文摘要: Researchers have proposed that a significant portion of the post-glacial rise in atmospheric CO2 could be due to the respiration of permafrost carbon stocks that formed over the course of glaciation. In this paper, we used the University of Victoria Earth System Climate Model v. 2.9 to simulate the deglacial and interglacial carbon cycle from the last glacial maximum to the present. The model’s sensitivity to mid and high latitude terrestrial carbon storage is evaluated by including a 600 Pg C carbon pool parameterized to respire in concert with decreases in ice sheet surface area. The respiration of this stored carbon during the early stages of deglaciation had a large effect on the carbon cycle in these simulations, allowing atmospheric CO2 to increase by 40 ppmv in the model, with an additional 20 ppmv increase occurring in the case of a more realistic, prescribed CO2 radiative warming. These increases occurred prior to large-scale carbon uptake due to the reestablishment of boreal forests and peatlands in the proxy record (beginning in the early Holocene). Surprisingly, the large external carbon input to the atmosphere and oceans did not increase sediment dissolution and mean ocean alkalinity relative to a control simulation without the high latitude carbon reservoir. In addition, our simulations suggest that an early deglacial terrestrial carbon release may come closer to explaining some observed deglacial changes in deep-ocean carbonate concentrations than simulations without such a release. We conclude that the respiration of glacial soil carbon stores may have been an important contributor to the deglacial CO2 rise, particularly in the early stages of deglaciation. © 2015, Springer-Verlag Berlin Heidelberg. 资助项目: NSERC, Natural Sciences and Engineering Research Council of Canada
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53839
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geography, Planning and Environment, Concordia University, 1445 Rue de Maisonneuve Ouest, H1255-26, Montréal, QC, Canada; Department of Atmospheric and Oceanic Sciences, McGill University, Montréal, QC, Canada
Recommended Citation:
Simmons C.T.,Matthews H.D.,Mysak L.A.. Deglacial climate, carbon cycle and ocean chemistry changes in response to a terrestrial carbon release[J]. Climate Dynamics,2016-01-01,46(2017-03-04)