ELT COLLABORATIVE RESEARCH: Investigating the Biotic and Paleoclimatic Consequences of Dust in the Late Paleozoic

ELT 合作研究:调查晚古生代尘埃的生物和古气候后果

基本信息

  • 批准号:
    1338331
  • 负责人:
  • 金额:
    $ 39.43万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2013
  • 资助国家:
    美国
  • 起止时间:
    2013-09-01 至 2019-08-31
  • 项目状态:
    已结题

项目摘要

Collaborative Research:Investigating the Biotic and Paleoclimatic Consequences of Dust in the Late PaleozoicbyGerilyn Soreghan, University of Oklahoma, EAR-1338331Sarah Aciego, University of Michigan, EAR-1337440Linda Hinnov, Johns Hopkins University, EAR-1337454Nicholas Heavens, Hampton University, EAR-1337463Overview Geologic data indicate that the tropical atmosphere during the Permo-Pennsylvanian (300 Million years ago) was dust-rich. In addition, algae predominated in late Paleozoic marine ecosystems. These observations, combined with predictions from climate modeling, prompt two over-arching hypotheses driving the proposed research: 1) the unusual tropical dustiness reflects dust production by tropical upland glaciers, and 2) atmospheric dustiness fertilized marine ecosystems. Dust forces the climate system by affecting radiative forcing and atmospheric moisture, and by influencing the biosphere, but these effects are poorly known. In this research, PIs will collect data to constrain spatial (low-mid latitude) and temporal (glacial-interglacial and longer) variations in atmospheric 'dustiness,' sources of the dust, and influences between dust and ecosystem composition in order to address their over-arching hypotheses, and clarify the relationships among atmospheric dustiness, climate, and the biosphere.Intellectual MeritThis research will reveal process links among dust, climate, and the biosphere within an icehouse, at glacial-interglacial scales. Owing to the known importance but great uncertainty of both the direct and indirect effects of dust on climate, results will expand understanding of Earth-system behavior. Tropical glaciation at low elevations implies much more widespread glaciation than currently accepted, and --if verified-- would force the community to test this hypothesis with new modeling approaches. The models to be used are identical to those used for present and future climate, and thus improvements made through the proposed work will inform modeling of Earth's climate in general. If the hypothesis that atmospheric dustiness forced marine biotic systems toward nutrient-rich conditions is confirmed, it implies a remarkably dusty Earth, and clarifies Earth-system behavior to dust-sourced fertilization. These results are relevant to growing discussions regarding geo-engineering schemes to control future climate change. Broader ImpactsCross-disciplinary training will occur via exchanges between geological and geochemical labs, geologists and modelers, and in joint field excursions and progress meetings. PhD students will mentor middle-school teachers through a formal summer program. Undergraduates will conduct senior theses and present at Undergraduate Research Day and national meetings. Both will interact with middle- and high-school students through a formal course on STEM education. The lead investigators will use components of the research to teach at university levels, as well as in museum, and community outreach. Ties will be established and strengthened among all participant institutions, which includes an Historically Black University, as well as international partners. This research will help ignite the research careers of three young investigators (2 with no prior NSF support). Data will be archived and shared via publications, and web-accessible tools.
合作研究:研究晚古生代尘埃对生物和古气候的影响gerilyn Soreghan,俄克拉荷马大学,ear -1338331; sarah Aciego,密歇根大学,ear -1337440; linda Hinnov,约翰霍普金斯大学,ear -1337454; nicholas Heavens,汉普顿大学,ear -1337463地质数据表明,在二叠纪-宾夕法尼亚时期(3亿年前)的热带大气是富含尘埃的。此外,晚古生代海洋生态系统以藻类为主。这些观察结果,结合气候模型的预测,提出了推动这项研究的两个主要假设:1)不寻常的热带粉尘反映了热带高地冰川产生的粉尘;2)大气粉尘使海洋生态系统肥沃。沙尘通过影响辐射强迫和大气湿度以及影响生物圈来强迫气候系统,但人们对这些影响知之甚少。在这项研究中,pi将收集数据来约束大气“粉尘”的空间(低中纬度)和时间(冰期-间冰期和更长时间)变化、粉尘来源以及粉尘与生态系统组成之间的影响,以解决其总体假设,并澄清大气粉尘、气候和生物圈之间的关系。这项研究将在冰期-间冰期尺度上揭示冰窖内粉尘、气候和生物圈之间的过程联系。由于已知尘埃对气候的直接和间接影响的重要性但又有很大的不确定性,结果将扩大对地球系统行为的理解。低海拔地区的热带冰川意味着比目前公认的更广泛的冰川,如果得到证实,将迫使科学界用新的建模方法来检验这一假设。所使用的模型与用于当前和未来气候的模型是相同的,因此,通过提议的工作所取得的改进将为一般的地球气候模型提供信息。如果大气粉尘迫使海洋生物系统向营养丰富的条件发展的假设得到证实,它意味着一个非常多尘的地球,并澄清了地球系统对粉尘源施肥的行为。这些结果与日益增长的关于控制未来气候变化的地球工程方案的讨论有关。更广泛的影响通过地质和地球化学实验室、地质学家和建模师之间的交流,以及联合实地考察和进展会议,将进行跨学科的培训。博士生将通过一个正式的暑期项目指导中学教师。本科生将撰写高级论文,并在本科生研究日和全国会议上发言。他们都将通过正式的STEM教育课程与中学生互动。主要研究人员将使用研究的组成部分在大学、博物馆和社区外展中进行教学。将建立和加强所有参与机构之间的联系,其中包括一所历史悠久的黑人大学,以及国际伙伴。这项研究将有助于点燃三名年轻研究者的研究生涯(2人没有事先获得NSF的支持)。数据将通过出版物和网络工具进行存档和共享。

项目成果

期刊论文数量(1)
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Gerilyn Soreghan其他文献

Gerilyn Soreghan的其他文献

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{{ truncateString('Gerilyn Soreghan', 18)}}的其他基金

Collaborative Research: EAR Climate: Earth-System Responses to the Penultimate Icehouse-Greenhouse Transition
合作研究:EAR 气候:地球系统对倒数第二个冰室-温室转变的反应
  • 批准号:
    2317596
  • 财政年份:
    2023
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Continuing Grant
Collaborative Research: Probing Causal Links Among Volcanism, Dust, and Carbon Burial in the Permian - a Harbinger of the Future?
合作研究:探索二叠纪火山、尘埃和碳埋藏之间的因果关系——未来的预兆?
  • 批准号:
    2103117
  • 财政年份:
    2021
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Continuing Grant
Collaborative Research: Equatorial Glaciation and Landscape Burial in the Late Paleozoic: Implications for Pangaean Climate and Tectonics
合作研究:晚古生代赤道冰川作用和景观埋藏:对盘古大陆气候和构造的影响
  • 批准号:
    1849623
  • 财政年份:
    2019
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Standard Grant
IRES: Landscapes of Deep Time in the Red Earth of France: Research Training in Paleoclimate
IRES:法国红土深处的时间景观:古气候研究培训
  • 批准号:
    1658614
  • 财政年份:
    2017
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Standard Grant
Quantifying Surface Area in Muds from the Antarctic Dry Valleys: Implications for Weathering in Glacial Systems
量化南极干谷泥浆的表面积:对冰川系统风化的影响
  • 批准号:
    1543344
  • 财政年份:
    2016
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Standard Grant
Acquisition of Automated Particle Size and Shape Analysis for Research and Education in Sedimentology, Paleoclimate, and Related Geoscience
获取自动粒度和形状分析,用于沉积学、古气候和相关地球科学的研究和教育
  • 批准号:
    1418716
  • 财政年份:
    2014
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Continuing Grant
Scientific Drilling and the Evolution of the Earth System: Climate, Biota, Biogeochemistry, and Extreme Events
科学钻探和地球系统的演化:气候、生物群、生物地球化学和极端事件
  • 批准号:
    1265243
  • 财政年份:
    2013
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Standard Grant
Assessing Weathering as a Function of Climate in Proximal Alluvial Sediments
评估近端冲积沉积物中气候的风化作用
  • 批准号:
    1225162
  • 财政年份:
    2012
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Standard Grant
U.S.-France Planning Visit: Investigating Upland Glaciation in the Pangaean Tropics
美法计划访问:调查盘古热带地区的高地冰川
  • 批准号:
    1132792
  • 财政年份:
    2011
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Standard Grant
Development of Quantitative Weathering Indicators in Proximal Alluvial Sediments to Assess Glacial Activity in the Rock Record
开发近端冲积沉积物定量风化指标以评估岩石记录中的冰川活动
  • 批准号:
    0842639
  • 财政年份:
    2009
  • 资助金额:
    $ 39.43万
  • 项目类别:
    Standard Grant

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ELT 合作研究:从大陆边缘剖面和建模推断二叠纪-三叠纪生物危机的原因和影响
  • 批准号:
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ELT 合作研究:调查晚古生代尘埃的生物和古气候后果
  • 批准号:
    1543518
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    1338313
  • 财政年份:
    2013
  • 资助金额:
    $ 39.43万
  • 项目类别:
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