Effect of global warming at the CTBE on mid-latitude vegetation: Insights from palynology and organic-geochemical proxies.

CTBE 全球变暖对中纬度植被的影响：来自孢粉学和有机地球化学代理的见解。

• 批准号: 108830515
• 负责人: Professor Dr. Ulrich Heimhofer
• 金额: --
• 依托单位: Institut de géologie et de paléontologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/108830515?language=en
• 关键词: Effect; global; warming; CTBE; mid

A critical assessment of terrestrial palaeoclimate proxy records is essential to better understand the impact of mid-Cretaceous extreme warmth on continental environments and ecosystems. The proposed pilot study will focus on spore-pollen assemblages and soilderived bacteria biomarkers (MBT index) from a site covering the Cenomanian-Turonian boundary event (CTBE). The study is designed (1) to establish a continental mean annual temperature (MAT) record based on the newly developed MBT biomarker proxy across the onset of the Cretaceous Thermal Maximum and (2) to test the response of mid-latitude plant communities to the climatic and environmental perturbations associated with the CTBE. A continuous 300 m section from the Southern Provence Basin, SE France will allow to study mid-latitude terrestrial temperature evolution and the associated vegetation response at a high time resolution and will be compared in detail with existing marine-derived proxy data on temperature evolution. The achievement of these goals is expected from a combined approach including organic geochemical and palynological investigations.

对陆地古气候替代记录的关键评估对于更好地了解白垩纪中期极端温暖对大陆环境和生态系统的影响是至关重要的。拟议的初步研究将侧重于覆盖塞诺马尼亚-图罗尼亚边界事件(CTBE)的地点的孢粉组合和土壤来源细菌生物标记物(MBT指数)。这项研究的目的是(1)基于新开发的跨越白垩纪最高温度的MBT生物标志物建立大陆平均年温度(MAT)记录；(2)测试中纬度植物群落对与CTBE相关的气候和环境扰动的响应。法国东南部普罗旺斯盆地的一个连续300米的剖面将允许以高时间分辨率研究中纬度地面温度演变和相关的植被响应，并将与现有的海洋提取的温度演变代理数据进行详细比较。这些目标的实现可望通过有机、地球化学和孢粉调查等综合方法来实现。