Identifying orbital- and sub-orbital-scale controls on the Asian summer monsoon: a 500,000 year hydroclimate record from Nam Co, Tibet [NamCore-UK]

确定对亚洲夏季风的轨道和亚轨道尺度控制:西藏纳木错 50 万年的水文气候记录 [NamCore-UK]

基本信息

  • 批准号:
    NE/W000989/1
  • 负责人:
  • 金额:
    $ 82.93万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2023
  • 资助国家:
    英国
  • 起止时间:
    2023 至 无数据
  • 项目状态:
    未结题

项目摘要

The Tibetan Plateau, located north of the Himalaya mountain range, is a large geographical area with an elevation greater than 4 km above sea-level. It is called "The Third Pole" because it has the third highest glacier ice volume after the Arctic and Antarctic, and it is a region that is already experiencing the effects on the ongoing global climate crisis. The Tibetan Plateau and associated glacier ice also have great significance for many neighbouring Asian countries, being the source of many of the major river systems supplying water to 100s of millions of people, as well as sediment that builds several mega-deltas that are homes to 10s of millions of individuals. The Tibetan Plateau also plays a major role in the Indian summer monsoon atmospheric circulation system, with the Sun's heating of the high-altitude region traditionally thought to set up a low-pressure cell (i.e., upward flowing heated air), into which wetter air masses are drawn from the Indian Ocean, from which seasonal monsoonal rain then falls over the Indian sub-continent. However, there remains a lack of detailed understanding of the controls on, and the complexity of, Asian monsoon systems, and additional knowledge is required in relation to how climate in this region will develop under future climate-change scenarios that will result from ongoing global warming.One way to gain an improved understanding of natural Earth systems, such as the Indian summer monsoon, is to investigate such systems in the historical and geological past, i.e. by the reconstruction of past climate (called palaeoclimate), one commonly used statement being "the past is the key to the present". To be able to investigate palaeoclimate it is necessary to have an archive of information and a means to reconstruct key palaeoclimate parameters, the latter termed a proxy-based approach because one measures something preserved in the archive (the proxy) that exhibits a relationship with the key parameter of interest. Continental lake sediments are one important archive and this project will utilise such materials from lake Nam Co on the Tibetan Plateau. Prior investigations of this lake have shown there is around 700 metres of sediment buried below the lake floor and it is expected that these sediments extend back to around one million years before present. The significant international value of the Nam Co lake sediment archive was recognised in summer 2020 by panels of international researchers who awarded US$1.5M from the International Continental Drilling Project (ICDP), an international agency currently with 21 member countries (including the UK). An additional US$0.9M funding also has already been committed by the Institute of Tibetan Plateau Research, Chinese Academy of Science (Beijing, China), further confirming the significance of this large-scale international research project.The Nam Co sediment archive will be recovered during summer 2023 by coring from a drilling rig sitting on top a barge that will float on the lake surface, an approach that has been applied successfully to many other ICDP lake drilling projects. Once the lake sediments have been recovered from below the lake floor they will be subject to numerous biological, chemical and physical measurements, in order to address the fundamental science questions that the Nam Co sediment archive will allow to be addressed. This UK NERC-funded project, including two of the proponents of the main ICDP project, will: 1) contribute additional funding to the lake coring operations; 2) apply chemistry-based dating techniques, so that the ages of the recovered sediments can be determined; 3) complete chemical proxy measurements on the lake sediments for palaeoclimate reconstruction, specifically with a focus on improving understanding of the water balance on the Tibetan Plateau and how that relates to controls on the Indian summer monsoon.
青藏高原位于喜马拉雅山脉以北,是一个海拔4公里以上的大地理区域。它被称为“第三极”,因为它拥有仅次于北极和南极的第三大冰川冰量,而且它是一个已经在经历持续的全球气候危机影响的地区。青藏高原及相关的冰川对许多亚洲邻国也具有重要意义,它们是许多主要水系的源头,为数亿人供水,也是建造几个巨型三角洲的沉积物的源头,这些三角洲是数千万人的家园。青藏高原在印度夏季风大气环流系统中也扮演着重要角色,传统上认为,太阳对高海拔地区的加热建立了一个低压单体(即向上流动的加热空气),从印度洋吸入更潮湿的气团,然后季节性季风雨落在印度次大陆上。然而,对亚洲季风系统的控制和复杂性仍然缺乏详细的了解,关于该地区的气候在未来全球变暖导致的气候变化情景下将如何发展,还需要更多的知识。要更好地了解自然地球系统,如印度夏季风,一种方法是研究这种系统在历史和地质历史上的变化,即通过重建过去的气候(称为古气候),一个常用的说法是“过去是打开现在的钥匙”。为了能够调查古气候,有必要有一个信息档案和一种重建关键古气候参数的手段,后者被称为基于代理的方法,因为人们可以测量保存在档案中的东西(代理),它显示出与感兴趣的关键参数的关系。陆相湖泊沉积物是一个重要的档案,该项目将利用青藏高原纳木错湖泊的此类材料。先前对这个湖的调查表明,湖底下埋藏着大约700米的沉积物,预计这些沉积物可以追溯到大约100万年前。2020年夏天,国际研究小组从国际大陆钻探项目(ICDP)获得了150万美元的资金,认识到了纳姆科湖泊沉积物档案的重大国际价值。ICDP是一个国际机构,目前有21个成员国(包括英国)。中国科学院青藏高原研究所(北京,中国)还承诺提供90万美元的额外资金,进一步证实了这一大型国际研究项目的重要性。2023年夏天,将通过从漂浮在湖面上的驳船上的钻机取芯来回收纳木错沉积物档案,这种方法已经成功地应用于许多其他ICDP湖泊钻探项目。一旦从湖底以下回收了湖泊沉积物,将对其进行多次生物、化学和物理测量,以解决南大西洋公约沉积物档案将允许解决的基础科学问题。这个由英国NERC资助的项目,包括主要的ICDP项目的两个倡导者,将:1)向湖泊取芯作业提供额外的资金;2)采用基于化学的测年技术,以便能够确定所恢复的沉积物的年龄;3)为重建古气候,对湖泊沉积物进行完整的化学替代测量,特别是着重提高对青藏高原水平衡以及这与印度夏季风的控制之间的关系的认识。

项目成果

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Leon Clarke其他文献

Erratum to: Impacts of rising air temperatures and emissions mitigation on electricity demand and supply in the United States: a multi-model comparison
  • DOI:
    10.1007/s10584-015-1452-9
  • 发表时间:
    2015-07-07
  • 期刊:
  • 影响因子:
    4.800
  • 作者:
    James McFarland;Yuyu Zhou;Leon Clarke;Patrick Sullivan;Jesse Colman;Wendy S. Jaglom;Michelle Colley;Pralit Patel;Jiyon Eom;Son H. Kim;G. Page Kyle;Peter Schultz;Boddu Venkatesh;Juanita Haydel;Charlotte Mack;Jared Creason
  • 通讯作者:
    Jared Creason
Integrated modeling of human-earth system interactions: An application of GCAM-fusion
人地系统相互作用的综合建模:GCAM-fusion 的应用
  • DOI:
    10.1016/j.eneco.2021.105566
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    12.8
  • 作者:
    C. Hartin;R. Link;P. Patel;Anupriya Mundra;Russell Horowitz;K. Dorheim;Leon Clarke
  • 通讯作者:
    Leon Clarke
Introduction to the Special Issue on Net-Zero Energy Systems
净零能源系统特刊简介
  • DOI:
    10.1016/j.egycc.2021.100066
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    0
  • 作者:
    I. Azevedo;C. Bataille;J. Bistline;Leon Clarke;Steven Davis
  • 通讯作者:
    Steven Davis
Near-term limits to mitigation: Challenges arising from contrary mitigation effects from indirect land-use change and sulfur emissions
  • DOI:
    10.1016/j.eneco.2013.09.026
  • 发表时间:
    2014-03-01
  • 期刊:
  • 影响因子:
  • 作者:
    Katherine Calvin;Marshall Wise;Leon Clarke;James Edmonds;Andrew Jones;Allison Thomson
  • 通讯作者:
    Allison Thomson
To achieve deep cuts in US emissions, state-driven policy is only slightly more expensive than nationally uniform policy
为了大幅削减美国的排放量,州政府主导的政策仅比全国统一政策略贵一点。
  • DOI:
    10.1038/s41558-021-01193-5
  • 发表时间:
    2021-10-28
  • 期刊:
  • 影响因子:
    27.100
  • 作者:
    Wei Peng;Gokul Iyer;Matthew Binsted;Jennifer Marlon;Leon Clarke;James A. Edmonds;David G. Victor
  • 通讯作者:
    David G. Victor

Leon Clarke的其他文献

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{{ truncateString('Leon Clarke', 18)}}的其他基金

Calibrating novel palaeotemperature proxies in laboratory aquaria cultured long-lived Arctica islandica mollusc shells
校准实验室水族箱养殖的长寿北极软体动物壳中的新型古温度代理
  • 批准号:
    NE/J012866/1
  • 财政年份:
    2012
  • 资助金额:
    $ 82.93万
  • 项目类别:
    Research Grant
Testing the veracity of the Mg/Ca palaeotemperature proxy in cultured marine molluscan calcite
测试培养海洋软体动物方解石中 Mg/Ca 古温度代理的准确性
  • 批准号:
    NE/E009875/1
  • 财政年份:
    2007
  • 资助金额:
    $ 82.93万
  • 项目类别:
    Research Grant

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酶响应的中性粒细胞外泌体载药体系在眼眶骨缺损修复中的作用及机制研究
  • 批准号:
    82371102
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  • 批准号:
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通过过去四十年的时间记录多角度轨道观测了解火星上的地下和表面大气相互作用过程
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价格、时间、
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Sub-Milankovitch Climate Variability in the Tropical Atlantic: Sensitivity and Linkages to Orbital Forcing, High Latitudes, and Plio-Pleisteocene Boundary Conditions
热带大西洋亚米兰科维奇气候变率:与轨道强迫、高纬度和上更新世边界条件的敏感性和联系
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