DOI: 10.1002/2016GL070723
论文题名: Evidence for a biological pump driver of atmospheric CO2 rise during Heinrich Stadial 1
作者: Hertzberg J.E. ; Lund D.C. ; Schmittner A. ; Skrivanek A.L.
刊名: Geophysical Research Letters
ISSN: 0094-8331
EISSN: 1944-8062
出版年: 2016
卷: 43, 期: 23 起始页码: 12242
结束页码: 12251
语种: 英语
英文关键词: AMOC
; biological pump
; CO2
; foraminifera
; Heinrich Stadial 1
; δ13C
Scopus关键词: Carbon
; Efficiency
; Glacial geology
; Oceanography
; AMOC
; Atlantic meridional overturning circulations
; Biological pumps
; Foraminifera
; Heinrich Stadial 1
; Intermediate depths
; Last deglaciation
; Remineralization
; Carbon dioxide
; Foraminifera
英文摘要: The initial trigger of the atmospheric CO2 rise during Heinrich Stadial 1 (HS1: 14.5–17.5 kyr B.P.) remains elusive. We present a compilation of four paired surface and intermediate-depth foraminiferal δ13C records to test whether reduced biological pump efficiency led to the initial CO2 rise during the last deglaciation. Surface ocean δ13C decreased across HS1 while intermediate-depth δ13C increased, leading to a reduction in the upper ocean δ13C gradient. Our compilation also suggests the δ13C gradient increased during the Bølling-Allerød (12.9–14.5 kyr B.P.) and decreased during the Younger Dryas (YD: 11.7–12.9 kyr B.P.). The HS1 and YD data are consistent with reduced biological export of isotopically light carbon from the surface ocean and its remineralization at depth. Our results support the idea that a weaker Atlantic Meridional Overturning Circulation decreased biological pump efficiency by increasing the overall fraction of preformed nutrients in the global ocean, leading to an increase in atmospheric CO2. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006160491&doi=10.1002%2f2016GL070723&partnerID=40&md5=b5dc2b85b4fd8610732de0682ffd2088
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9294
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Marine Sciences, University of Connecticut, Groton, CT, United States
Recommended Citation:
Hertzberg J.E.,Lund D.C.,Schmittner A.,et al. Evidence for a biological pump driver of atmospheric CO2 rise during Heinrich Stadial 1[J]. Geophysical Research Letters,2016-01-01,43(23).