Evidence for cold events in the early Holocene from the Guliya ice core, Tibetan Plateau,China

来源 :Chinese Science Bulletin | 被引量 : 0次 | 上传用户:jessicazrz
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Evidence for the “8.2 ka cold event” has been provided mostly from the circum-North Atlantic area. However, whether this cold event occurred in other places is a key to understanding its cause. Here, we provide the evidence for the “8.2 ka cold event” from the Guliya ice core in the northwest Tibetan Plateau, and it was found that the peak cooling (-8.3-8.2 ka) in this ice core was about 7.8-10°C, which was larger than the cooling in the North Atlantic region. The primary causes for this episode were diminished solar activity and weakened thermohaline circulation. Moreover, another weak cold event, centered about 9.4 ka, was also recorded in the Guliya ice core record. These two cold events were concurrent with the ice-rafting episodes in the North Atlantic during the early Holocene, which implies that the millennial-scale climatic cyclicity might exist in the Tibetan Plateau as well as in the North Atlantic. Evidence for the “8.2 ka cold event ” has been provided mostly from the circum-North Atlantic area. However, whether this nor cold event occurred in other places is a key to understanding its cause. Here, we provide the evidence for the “8.2 ka cold event” from the Guliya ice core in the northwest Tibetan Plateau, and it was found that the peak cooling (-8.3-8.2 ka) in this ice core was about 7.8-10 ° C, which was larger than the cooling in the North Atlantic region. The primary causes for this episode were diminished solar activity and weakened thermohaline circulation. Moreover, another weak cold event, centered about 9.4 ka, was also recorded in the Guliya ice core record. Both two cold events were concurrent with the ice-rafting episodes in the North Atlantic during the early Holocene, which implies that the millennial-scale climatic cyclicity might exist in the Tibetan Plateau as well as in the North Atlantic.
其他文献
2013年11月7日讯——日前,Vishay Intertechno1ogy,Inc宣布,推出采用3.2 mm×2.51 mm×1.2 mm透明SMD侧视封装的新款940 nm高速红外发光二极管VSMY14940和VSMB14940。这两款
对武汉电力职业技术学院高等数学教学改革的实践进行了阐述,介绍了教学内容模块化的改革和基于数学实验的教学模式的改革。 This paper elaborates the practice of higher
The effects of strain and surface roughness scattering on the quasi-ballistic hole transport in a strained gate-all-around germanium nanowire p-channel field-ef
We report new 40Ar/39Ar dating results ob-tained from total fusion and incremental-heating analyses of sanidine and biotite from three tuffs found interbedded w
根据从印度库茂恩(Kumaun)喜马拉雅纳尼塔尔(Naini Tal)温带地区获得的85 cm钻井的孢粉资料,恢复了1720+/-130年以来晚全新世古植被演变史,并推测了当地的古气候。当前孢粉资
中国地球科学促进会(IPACES)和同济大学海洋与地球科学学院于2002年6月26~28日联合举办了“亚洲构造:从大陆到边缘海到岛弧”学术研讨会.会议主题是将亚洲和西太平洋作为一个统
Based on cross-dating tree rings from the Tianmu Mountain, Zhejiang Province, the tree rings α-cellulose δ13C time series was measured. By spectrum analysis,
In this study, to reconstruct the paleoclimatic history, pollen and oxygen isotope were analyzed on the 160 samples of a 2.7 m peat core from Taishizhuang, Huai
中职数学承担着促进学生职能发展与进一步学习专业知识的基础课程功能。本文从中职数学教学中教师和学生不同的角度,结合中职数学教学中常见的问题,提出改变教育观念、改善师
兼语句和主谓短语作宾语句是现代汉语中广泛存在的语法现象,它们结构相似,加以区分很有必要。使用不同句法分析法,能够全面、细致地得出结论。每种分析法都有优势和缺陷,一种