Holocene variability in sea surface temperature and sea ice extent in the northern Bering Sea: A multiple biomarker study

被引：13
作者：
Ruan, Jiaping [1 ,2 ]
Huang, Yuanhui [3 ,4 ]
Shi, Xuefa [3 ,4 ]
Liu, Yanguang [3 ,4 ]
Xiao, Wenjie [1 ,2 ]
Xu, Yunping [1 ]
机构：
[1] Shanghai Ocean Univ, Coll Marine Sci, Hadal Sci & Technol Res Ctr HAST, Shanghai 201306, Peoples R China
[2] Peking Univ, Coll Urban & Environm Sci, MOE Key Lab Earth Surface Proc, Beijing 100871, Peoples R China
[3] State Ocean Adm, Key Lab, Inst Oceanog 1, State Ocean Adm Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China
[4] Natl Oceanog Lab, Funct Lab Marine Geol, Qingdao 266061, Peoples R China
来源：
ORGANIC GEOCHEMISTRY | 2017年 / 113卷
基金：
中国国家自然科学基金;
关键词：
Highly branched isoprenoid alkenes (HBIs); IP25; Sea ice; Sea surface temperature; Bering Sea; DIALKYL GLYCEROL TETRAETHERS; CANADIAN ARCTIC ARCHIPELAGO; LAST GLACIAL MAXIMUM; CLIMATE-CHANGE; MEMBRANE-LIPIDS; PROXY IP25; PACIFIC; OCEAN; ATLANTIC; SUBPOLAR;
D O I：
10.1016/j.orggeochem.2017.08.006
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The Bering Sea, as a transition between the Arctic and the Pacific oceans, plays an important role in global climate change and biogeochemical cycles. Here we examined a variety of biomarkers in a core (BR07) from the northern continental slope of the Bering Sea in order to reconstruct summer sea surface temperature (SST) and sea ice extent during the period 11-2 ka (thousands of calendar years ago). The TEX86L-derived SST gradually decreased (ca. 1.6 degrees C) from early to mid-Holocene (11.3-8.0 ka), but did not show a cooling or warming trend afterwards. Our SST data do not support the hypothesis of a Holocene seesaw in temperature between the North Atlantic and the North Pacific. Several algal biomarkers, including IP25 and its derived indicators for sea ice, brassicasterol for diatoms and dinosterol for dinoflagellates, suggest that the sea ice extent gradually increased from early to late Holocene, interrupted by rapid changes at ca. 2.8-2.6 and 5.5-5.0 ka. The synchronous evolution between IP25 and SST indicates a strong coupling between sea ice cover and climate change in the Holocene. (C) 2017 Elsevier Ltd. All rights reserved.
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页码：1 / 9
页数：9
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