The influence of land-surface reactivity on atmospheric carbon dioxide during past hyperthermals
过去高温期间地表反应性对大气二氧化碳的影响
基本信息
- 批准号:22K14137
- 负责人:
- 金额:$ 2.91万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Early-Career Scientists
- 财政年份:2022
- 资助国家:日本
- 起止时间:2022-04-01 至 2024-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In this study, marine sediments were analysed for magnesium and lithium isotopes to create a time-series of chemical and physical silicate weathering in the Earth’s geological past. The purpose is to elucidate the response of silicate weathering, which experts a major control on atmospheric CO2 concentration, to regional and global warming. A warmer, wetter climate should provide more energy and fluids for silicate weathering reaction at the Earth’s surface to occur, consuming atmospheric CO2 and reversing the global warming trend. However, if the products of silicate weathering remain in the surficial system for too long before being deposited in marine sediments, they are converted back to silicates (reverse weathering), remitting the consumed CO2 leading to no net change on climate.During the past fiscal year, 200 sediment samples from several International Ocean Drilling Program (IODP) and Ocean Drilling Program (ODP) cores collected from deep ocean basins as well as the Amazon margin were ordered, dried, crushed and chemically processed to extract the carbonate, iron oxide and silicate phase. Magnesium is currently being purified from these phases with further purification Li still to be conducted. Magnesium and Li isotopes with then be measured via inductively coupled plasma mass spectrometry. This work will provide records of past weathering during periods of regional (Amazonian) and global warming over tens of thousands to millions of years to help understand the silicate weathering capacity to reverse global warming.
在这项研究中,分析了海洋沉积物的镁和锂同位素,以创建地球地质历史中化学和物理硅酸盐风化的时间序列。目的是阐明硅酸盐风化对区域和全球变暖的响应,硅酸盐风化是大气CO2浓度的主要控制因素。一个更温暖、更湿润的气候应该会为地球表面的硅酸盐风化反应提供更多的能量和流体,消耗大气中的二氧化碳,扭转全球变暖的趋势。然而,如果硅酸盐风化的产物在沉积到海洋沉积物之前在地表系统中停留的时间过长,它们就会转换回硅酸盐(反向风化),缓解消耗的二氧化碳,导致气候没有净变化。在过去的财政年度里,国际海洋钻探计划(IODP)和海洋钻探计划(ODP)从深海盆地和亚马逊边缘收集了200个沉积物样本,进行了干燥、粉碎和化学处理,以提取碳酸盐、氧化铁和硅酸盐相。镁目前正在从这些相中提纯,进一步提纯Li仍在进行中。用电感耦合等离子体质谱法测定镁和锂同位素。这项工作将提供过去在区域(亚马逊河流域)和全球变暖时期的风化记录,以帮助了解硅酸盐风化逆转全球变暖的能力。
项目成果
期刊论文数量(7)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Adam David Sproson, Toshihiro Yoshimura, Takahiro Aze, Shigeyuki Wakaki, Tsuyoshi Ishikawa, Yusuke Yokoyama, Naohiko Ohkouchi
亚当·大卫·斯普罗森、吉村敏宏、阿泽贵宏、若木茂行、石川刚、横山佑介、大河内直彦
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Sproson Adam D.;Pogge von Strandmann Philip A.E.;Selby David;Jarochowska Emilia;Frida Jiri;Hladil Jindrich;Loydell David K.;Slavik Ladislav;Calner Mikael;Maier Georg;Munnecke Axel;Lenton Timothy M.;Can Mg and Li isotopes in the authigenic and detrital fractions of sediments be used to trace paleoweathering? Case study: The EOT
- 通讯作者:Can Mg and Li isotopes in the authigenic and detrital fractions of sediments be used to trace paleoweathering? Case study: The EOT
Adam Sproson, Yusuke Yokoyama, Yosuke Miyairi, Takahiro Aze, Rebecca L Totten
亚当·斯普罗森、横山佑介、宫入阳介、阿泽贵宏、丽贝卡·L·托顿
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Sproson Adam D.;Pogge von Strandmann Philip A.E.;Selby David;Jarochowska Emilia;Frida Jiri;Hladil Jindrich;Loydell David K.;Slavik Ladislav;Calner Mikael;Maier Georg;Munnecke Axel;Lenton Timothy M.;Southern Hemisphere pacing of global climate during the Late Pleistocene;Holocene Ice Loss in the Amundsen Sea Embayment Linked to Tropical Pacific Warming
- 通讯作者:Holocene Ice Loss in the Amundsen Sea Embayment Linked to Tropical Pacific Warming
Osmium and lithium isotope evidence for weathering feedbacks linked to orbitally paced organic carbon burial and Silurian glaciations
锇和锂同位素证据表明风化反馈与轨道有机碳埋藏和志留纪冰川有关
- DOI:10.1016/j.epsl.2021.117260
- 发表时间:2022
- 期刊:
- 影响因子:5.3
- 作者:Sproson Adam D.;Pogge von Strandmann Philip A.E.;Selby David;Jarochowska Emilia;Frida Jiri;Hladil Jindrich;Loydell David K.;Slavik Ladislav;Calner Mikael;Maier Georg;Munnecke Axel;Lenton Timothy M.
- 通讯作者:Lenton Timothy M.
Beryllium isotope variations recorded in the Adélie Basin, East Antarctica reflect Holocene changes in ice dynamics, productivity, and scavenging efficiency
南极洲东部阿德利盆地记录的铍同位素变化反映了全新世冰动力学、生产力和清除效率的变化
- DOI:10.1016/j.qsa.2022.100054
- 发表时间:2022
- 期刊:
- 影响因子:4.5
- 作者:Behrens, Bethany C.;Yokoyama, Yusuke;Miyairi, Yosuke;Sproson, Adam D.;Yamane, Masako;Jimenez-Espejo, Francisco J.;McKay, Robert M.;Johnson, Katelyn M.;Escutia, Carlota;Dunbar, Robert B.
- 通讯作者:Dunbar, Robert B.
Adam Sproson, Yusuke Yokoyama, Yosuke Miyairi, Takahiro Aze, Vincent J Clementi, Hailey Riechelson, Samantha Claudia Bova, Yair Rosenthal, Laurel B Childress
亚当·斯普罗森、横山佑介、宫入洋介、阿泽贵宏、文森特·J·克莱门蒂、海莉·里切尔森、萨曼莎·克劳迪娅·博瓦、亚伊尔·罗森塔尔、劳雷尔·B·柴尔德里斯
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Sproson Adam D.;Pogge von Strandmann Philip A.E.;Selby David;Jarochowska Emilia;Frida Jiri;Hladil Jindrich;Loydell David K.;Slavik Ladislav;Calner Mikael;Maier Georg;Munnecke Axel;Lenton Timothy M.;Southern Hemisphere pacing of global climate during the Late Pleistocene
- 通讯作者:Southern Hemisphere pacing of global climate during the Late Pleistocene
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