卢嘉欣^1,,
姚远²,
朱泽阳^3,4,5,
孙春青^3,4,
伍婧^3,4,
刘嘉麒^3,4,5,1,,
1. 河北地质大学地球科学学院, 河北 石家庄 050031
2. 西安交通大学全球环境变化研究院, 陕西 西安 710054
3. 中国科学院地质与地球物理研究所, 中国科学院新生代地质与环境院重点实验室, 北京 100029
4. 中国科学院地球科学研究院, 北京 100029
5. 中国科学院大学, 北京 100049

基金项目: 中国科学院前沿科学重点研究项目（批准号：QYZDY-SSW-DQC030）和国家自然科学基金项目（批准号：41702187和41572353）共同资助


详细信息

作者简介: 卢嘉欣, 女, 26岁, 硕士研究生, 古生物学与地层学专业, E-mail:geoljx@outlook.com

通讯作者: 刘嘉麒, E-mail:liujq@mail.iggcas.ac.cn

中图分类号: P593;P532

收稿日期:2020-07-20
修回日期:2020-09-22
刊出日期:2021-01-30

Relationship between brGDGTs-based temperatures and volcanism record in the recent 300 years in Arxan region

LU Jiaxin^1,,
YAO Yuan²,
ZHU Zeyang^3,4,5,
SUN Chunqing^3,4,
WU Jing^3,4,
LIU Jiaqi^3,4,5,1,,
1. College of Earth Sciences of Hebei GEO University, Shijiazhuang 050031, Hebei
2. Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710054, Shaanxi
3. Key Laboratory of Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029
4. Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029
5. University of Chinese Academy of Sciences, Beijing 100049


More Information

Corresponding author: LIU Jiaqi,E-mail:liujq@mail.iggcas.ac.cn

MSC: P593;P532

--> Received Date: 20 July 2020
Revised Date: 22 September 2020
Publish Date: 30 January 2021


摘要
摘要:火山活动被认为是影响全球温度百年到千年时间尺度上变化的最主要因素。本研究对我国东北阿尔山地区鹿鸣湖的一支长约85 cm沉积物中支链甘油二烷基甘油四醚类化合物（brGDGTs）相关指标进行分析和计算，重建了近300年来阿尔山地区的生长季节（5~9月）温度变化。结果显示近300年来，研究区生长季温度的平均值在13.8℃左右，温度变幅为3.0℃左右。18世纪到20世纪初，阿尔山地区生长季温度呈波动趋势，20世纪初至20世纪90年代从14.0℃左右持续下降到了12.0℃，降温趋势较好地响应了大型火山喷发事件发生频率的增加，20世纪90年代之后表现出较为明显的增温趋势。相关性分析的结果表明近300年来大型火山喷发事件的发生频率和阿尔山地区的生长季温度变化有较好的相关性，火山喷发事件是阿尔山地区百年尺度上生长季温度变化的重要控制因素。
关键词: brGDGTs/
生长季节温度/
定量重建/
火山喷发记录/
阿尔山地区

Abstract:Volcanism is considered to be the most important factor affecting global temperature changes on centennial/millennial time scale. The study on this issue has made considerable progress in the past 40 years, attributes to the appearance of long-term volcanic eruption records reconstructed by the sulfate concentration from polar ice cores. Although there is a good correspondence between large-scale volcanic eruptions and regional cooling events, the systemic correlation between the growth season temperature changes reconstructed from the tree-ring records from low-and mid-latitude regions and the volcanic eruption records are relatively poor. The reason may be that the growth of tree rings in low-and mid-latitude regions is affected by a variety of factors such as temperature, rainfall, and photosynthesis, resulting in deviations of the temperature reconstruction for growth season. Therefore, new quantitative temperature reconstruction indicator in mid- and high-latitude regions is expected to explore the impact of volcanic eruptions on regional temperature changes. In order to solve this problem, the new biomarker indicator widely branched glycerol dialkyl glycerol tetraether lipids(brGDGTs), which is abundant in lacustrine sediments, has been used in quantitative past temperature reconstruction. In recent years, with the continuous maturity of GDGTs analysis technology and quantitative reconstruction calibration methods, it has become possible to quantitatively reconstruct regional summer temperature changes using MBT and CBT in lacustrine sediments.
In this study, a 85 cm-long gravity core was drilled in the central part of Luming Lake(47°24'N, 120°30'E; 1179 m a.s.l.), NE China. The second half was sub-sampled at 1 cm intervals and these samples were freeze-dried, and 1~7 g was collected to analyze the GDGTs. The chronology was based on the 22 ²¹⁰Pb/¹³⁷Cs dates and 1 AMS ¹⁴C dates. This study presented an independent growth temperature(May-September) record based on brGDGTs during the last 300 years from Luming Lake, Arxan region, Northeast China. The results show that the average growth season temperature in the study area is ca. 13.8 ℃ in the past 300 years, and the range is ca. 3.0 ℃. From the 18th century to the beginning of the 20th century, the growth season temperature in study area showed a fluctuating trend. From the beginning of the 20th century to the 1990s, it continues to drop from about 14.0 ℃ to 12.0 ℃, which indicates that the cooling responds well to the increasing frequency of large-scale volcanic eruptions. After the 1990s, it shows an obvious warming trend. The results of the correlation analysis show that the frequency of the large-scale volcanic eruptions has a good correlation with the growth season temperature changes in Arxan area in the past 300 years. Volcanism is an important control factor for the growth season temperature changes on centennial time scale in study area.
Key words:brGDGTs records/
temperature of growth season/
quantitative reconstruction/
volcanism/
Arxan region



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