P2C2: New Analyses of Paleo-Seasonality and Climate Variability Using Fossil Wood
P2C2:利用化石木材对古季节和气候变化进行新分析
基本信息
- 批准号:1903601
- 负责人:
- 金额:$ 25.93万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-08-01 至 2023-01-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project aims to leverage existing fossil wood specimens and a newly developed model to generate new data on seasonality and climate variability across three field sites: 1) Banks Island, Arctic Canada (early Eocene); 2) Nanning Basin, China (late Oligocene); and 3) Finish Stream, Siberia (late Miocene). More than 100 fossil specimens are available from previous collections at these sites. Preliminary data show sufficient cellulose preserved in these fossils is suitable for high-resolution oxygen isotope analysis. These new data, combined with published carbon isotope records, allow for new quantitative estimates of a full suite of seasonal climate parameters (summer precipitation, winter precipitation, cold month mean temperature, warm month mean temperature) at annual resolution. Such data will allow for changes in seasonality to be assessed across multiple levels of atmospheric carbon dioxide (CO2) concentrations for both Arctic and monsoon climates. The researchers plan to generate new high-resolution stable isotope datasets to test: 1) inter-annual variability in the East Asian Monsoon during the late Oligocene, when atmospheric CO2 concentrations were similar to projected late 21st century levels, and 2) how winter versus summer temperatures change with increases in mean annual temperature, across both subtropical and Arctic environments. Recent modeling work predicts changes in precipitation timing and intensity occur under warmer mean annual temperatures, and greater wintertime versus summertime warming, which is amplified in Arctic environments; however, proxies generally lack suitable resolution to test these hypotheses in the fossil record.The potential Broader Impacts include new paleoclimate records at sub-annual resolution during the Eocene, Oligocene and Miocene. These high-resolution proxies are rare and will provide new information about inter-annual climate variability and seasonality at high and low latitudes during time intervals with different atmospheric CO2 concentration. Such data will benefit proxy and modeling paleoclimate communities. The project will support one PhD and one undergraduate student as well as researchers at various career-stages.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
该项目旨在利用现有的化石木材标本和新开发的模型,在三个实地站点生成关于季节性和气候变化的新数据:1)加拿大北极班克斯岛(始新世早期); 2)中国南宁盆地(渐新世晚期); 3)西伯利亚Finish Stream(中新世晚期)。在这些遗址中有100多个化石标本来自以前的收藏。初步数据显示,这些化石中保存了足够的纤维素,适合进行高分辨率氧同位素分析。 这些新的数据,结合公布的碳同位素记录,允许新的定量估计的一整套季节性气候参数(夏季降水量,冬季降水量,冷月平均温度,温暖的月平均温度)在年度分辨率。这些数据将允许在北极和季风气候的大气二氧化碳(CO2)浓度的多个水平上评估季节性变化。研究人员计划生成新的高分辨率稳定同位素数据集,以测试:1)渐新世晚期东亚季风的年际变化,当时大气二氧化碳浓度与预计的21世纪末水平相似,以及2)冬季与夏季温度如何随着年平均温度的增加而变化,在亚热带和北极环境中。 最近的建模工作预测的降水时间和强度的变化发生在温暖的年平均温度,更大的冬季与夏季变暖,这是在北极环境中放大;然而,代理一般缺乏合适的分辨率来测试这些假设在化石record.The潜在的更广泛的影响,包括新的古气候记录在始新世,渐新世和中新世的次年度分辨率。这些高分辨率的代用品是罕见的,将提供新的信息,年际气候变率和季节性在高纬度和低纬度的时间间隔与不同的大气CO2浓度。这些数据将有利于代理和模拟古气候社区。该项目将支持一名博士生和一名本科生以及处于不同职业阶段的研究人员。该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Low oxygen isotope values of fossil cellulose indicate an intense monsoon in East Asia during the late Oligocene
- DOI:10.1016/j.palaeo.2021.110556
- 发表时间:2021-07
- 期刊:
- 影响因子:0
- 作者:J. Ren;B. Schubert;W. Lukens;C. Quan
- 通讯作者:J. Ren;B. Schubert;W. Lukens;C. Quan
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Brian Schubert其他文献
Brian Schubert的其他文献
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{{ truncateString('Brian Schubert', 18)}}的其他基金
Development of new high-resolution pCO2 records for quantifying Earth system climate sensitivity
开发新的高分辨率 pCO2 记录以量化地球系统气候敏感性
- 批准号:
1603051 - 财政年份:2016
- 资助金额:
$ 25.93万 - 项目类别:
Continuing Grant
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