Controls on 231Pa and 230Th in the Arctic Ocean

被引：9
作者：
Luo, Yiming [1 ]
Lippold, Joerg [2 ,3 ]
机构：
[1] Dalhousie Univ, Dept Oceanog, Halifax, NS, Canada
[2] Univ Bern, Inst Geol Sci, Bern, Switzerland
[3] Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland
来源：
GEOPHYSICAL RESEARCH LETTERS | 2015年 / 42卷 / 14期
基金：
加拿大自然科学与工程研究理事会;
关键词：
sediment; 231Pa; 230Th; Arctic Ocean; 2-D model; circulation; THERMOHALINE CIRCULATION; PA-231/TH-230; ADVECTION; CONSTRAINTS; THORIUM; RATES;
D O I：
10.1002/2015GL064671
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The distributions of Th-230 and Pa-231 in the Arctic Ocean are not well understood. In order to examine the Arctic Pa-231/Th-230 system and therefore to shed light on the future use of Arctic sedimentary Pa-231/Th-230, we developed a 2-D scavenging model modified from an Atlantic model. Tuned with reasonable parameters that are consistent with Eurasian Basin geographic settings, the model can reproduce most of the features of the Th-230 and Pa-231 water column profiles as well as the sedimentary Pa-231/Th-230 distribution patterns and suggests that the sedimentary Pa-231/Th-230 in the Eurasian Basin is mainly controlled by the deep water circulation. In our attempt to reproduce the sedimentary Pa-231/Th-230 patterns during the last glacial, we found that circulation strength in the Eurasian Basin at shallower depths may have been stronger than today.
引用
收藏
页码：5942 / 5949
页数：8
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