Boundary scavenging at the East Atlantic margin does not negate use of 231Pa/230Th to trace Atlantic overturning
Boundary scavenging at the East Atlantic margin does not negate use of 231Pa/230Th to trace Atlantic overturning
复制标题
东大西洋边缘的边界清除并不否定使用 231Pa/230Th 来追踪大西洋翻转
DOI:
10.1016/j.epsl.2012.04.005
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发表时间:
2012
影响因子:
5.3
通讯作者:
M. Christl
中科院分区:
文献类型:
--
作者:
Lippold;S. Mulitza;G. Mollenhauer;D. Heslop;S. Weyer;M. Christl
The231Pa/230Th method is a promising tool to reconstruct Ocean circulation over the past Glacial–Interglacial cycle. However, marine particle flux may constrain the applicability of this ratio as a direct quantitative proxy for the strength of Atlantic Meridional Overturning Circulation (AMOC) by influencing the fractionation between the in situ produced231Pa and230Th in ocean water. Here we present231Pa/230Th down-core profiles from high particle flux areas off Namibia and Senegal covering the past ∼35ka. The231Pa/230Th profiles at these sites show very different responses to temporal variations of particle fluxes and to changes in water masses. Our results show that sedimentary231Pa/230Th in the Eastern Atlantic margin is linked to particle flux, but controlled primarily by the mode of the AMOC. Our data suggest that during the past ∼30ka the high productivity Eastern margin was not capable of importing and storing significant amounts of231Pa from the open Ocean. Consequently, the applicability of the231Pa/230Th proxy to reconstruct past ocean circulation is not hampered by this potentially additional231Pa sink.
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DOI:
10.1016/s0031-0182(96)00136-8
发表时间:
1997
期刊:
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子:
--
作者:
M. Little;R. Schneider;D. Kroon;B. Price;T. Bickert;G. Wefer
通讯作者:
G. Wefer
影响因子:
--
作者:
H. Niebler;H. Arz;B. Donner;S. Mulitza;J. Pätzold;G. Wefer
通讯作者:
G. Wefer
影响因子:
--
作者:
J. Gherardi;Yiming Luo;R. Francois;J. McManus;S. Allen;L. Labeyrie
通讯作者:
L. Labeyrie
DOI:
10.1016/j.nimb.2007.05.017
发表时间:
2007
影响因子:
1.3
作者:
M. Christl;L. Wacker;J. Lippold;H. Synal;M. Suter
通讯作者:
M. Suter
影响因子:
5.3
作者:
Z. Chase;R. Anderson
通讯作者:
R. Anderson