杜志恒^1,,
SoonDo Hur²,
效存德^3,1,
杨佼¹,
林佳梅⁴,
YeongcheolHan²,
张通³,
李传金¹,
任贾文¹,
王士猛¹,
SeongJoon Jun²,
SangBum Hong²,
KhanghyunLee²
1. 中国科学院西北生态环境资源研究院, 冰冻圈科学国家重点实验室, 甘肃 兰州 730000
2. Korea Polar Research Institute, Incheon 21990, Korea
3. 北京师范大学, 地表过程与资源生态国家重点实验室, 北京 100875
4. Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, Copenhagen N 2200, Denmark

基金项目: 国家自然科学基金项目（批准号：42071086）、国家重点研发计划项目（批准号：2018YFC1406104和2020YFA0608500）、韩国极地研究研究所项目（批准号：PE17040）和中国科学院西北生态环境资源研究院冰冻圈科学国家重点实验室专项项目（批准号：SKLCS-ZZ-2012；ZZ-2020）共同资助


详细信息

作者简介: 杜志恒, 男, 35岁, 副研究员, 极地冰冻圈与环境变化研究, E-mail: zhihengdu@lzb.ac.cn

中图分类号: P727.1;P591

收稿日期:2021-01-22
修回日期:2021-03-17
刊出日期:2021-05-30

The history of explosive volcanism in a Greenland NEEM ice core during 1711~1969

DU Zhiheng^1,,
Soon Do HUR²,
XIAO Cunde^3,1,
YANG Jiao¹,
LIN Jiamei⁴,
Yeongcheol HAN²,
ZHANG Tong³,
LI Chuanjin¹,
REN Jiawen¹,
WANG Shimeng¹,
Seong Joon JUN²,
Sang Bum HONG²,
Khanghyun LEE²
1. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu
2. Korea Polar Research Institute, Incheon 21990, Korea
3. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875
4. Physics of Ice, Climate and Earth, Niels Bohr Institute, Univerisity of Copenhagen, Copenhagen N 2200, Denmark


MSC: P727.1;P591

--> Received Date: 22 January 2021
Revised Date: 17 March 2021
Publish Date: 30 May 2021


摘要
摘要:冰芯作为良好的地质载体，为第四纪气候和环境研究提供了详实的信息。本研究利用连续流动装置对格陵兰冰盖西北部获取的一支90 m浅冰芯（命名为NEEM2009S1：77.45°N，51.06°W；海拔高度2450 m）融化处理，对氧和氢同位素比率（δ¹⁸O和δD，2 cm分辨率）和硫酸根离子浓度（SO₄^2-，10~12 cm分辨率）进行了测试。基于δ¹⁸O和关键的强火山事件对该冰芯进行了定年，结果为1711~1969年（不确定性为±1年）；通过非海盐硫酸根离子浓度（nssSO₄^2-）重建了该冰芯过去1711~1969年期间火山事件的历史。SO₄^2-浓度和通量很好地揭示了不同强度大小的火山事件。评估了强火山事件（VEI≥5）其产生的气候制冷效应；同时，由于该冰芯距离冰岛较近，本研究重点讨论了该冰芯对冰岛火山事件的记录历史，数据结果对了解冰岛历史时期火山信息具有重要的意义；此外，低纬度东亚与阿拉斯加地区的火山也容易传输至格陵兰冰盖。重建结果对于更好的理解火山事件对区域、全球环境与气候的影响具有重要的参考价值。
关键词: 格陵兰冰盖/
NEEM冰芯/
火山事件/
冰岛/
气候效应

Abstract:In this study, as part of the NEEM deep ice core, a 90 m shallow ice core(North Eemian(NEEM) 2009S1:77.45°N, 51.06°W; 2450 m a.s.l.) was drilled from northwest Greenland. Ice core samples from this core were melted using continuous flow analysis. The chemical compositions(with resolutions of 2.5 cm and 5 cm) and ratios of δ¹⁸O and δD(with resolutions of 10~12 cm) were analysed using the ion chromatography and Picarro wavelength-scanned cavity ring-down spectrometers, respectively. The results indicate that the ages in the ice core range from 1711 to 1969 (19 m to 90 m) using δ¹⁸O annual layer information and volcanic markers(i.e., non-sea salt(nss) sulfate). The estimated dating uncertainty is about ±1 a at the bottom of the core. A detailed history of volcanism covering the last 259 a was reconstructed. The measured non-sea salt sulfate concentrations agree well with documented volcanic events, which indicates that the history of volcanic eruptions in Iceland is clearly preserved in this shallow core. The eruption data recorded in the NEEM2009S1 core demonstrate that the larger volcanic events have a significant cooling effect, and volcanic aerosols from East Asia are easily transported to the Greenland ice sheet, which will contribute to a better understanding of the processes controlling the climate and environment of Greenland.
Key words:Greenland ice sheet/
NEEM ice core/
volcanic eruptions/
Iceland/
climatic effect



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