Microfossils as indicators of aquatic ecosystem evolution and monsoon dynamics

微化石作为水生生态系统演化和季风动态的指标

• 批准号: 68810480
• 负责人: Professor Dr. Peter Frenzel
• 金额: --
• 依托单位: Helmholtz-Zentrum hereon GmbH
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/68810480?language=en
• 关键词: Microfossils; indicators; aquatic; ecosystem; evolution

During the 2nd funding period (12 months) we propose to (1) perform coupled actualisticecological and taxonomic analysis of Recent ostracodes from the Tibetan Plateau (TP), to use species assemblages and shell chemistry to detect lake level changes in response to monsoon dynamics, melt water supply and variations in precipitation vs. evaporation ratios at (2) annual to decadal resolution for the past approx. 1000 years from Lakes Mug Co, Ra’og Co and Tangra Yum Co located along an East-West transect ranging from approx. 101°E to 86°E, and at (3) decadal to centennial resolution from Lakes Tangra Yum Co and Heihai to assess longterm environmental changes and short-term events during the late Pleistocene and Holocene. Lake sites are strategically selected on the southern and northern TP in order to detect different monsoonal air mass impact. The environmental interpretation of fossil ostracode assemblages will be based on ecological tolerances, preferences and transfer functions. The proxy data-inferred regional hydrological effects of monsoon development will be compared to results from statistical downscaling at selected sites for the last 7000 years. GCM simulations forced with different combinations of external forcing parameters (orbital, solar, volcanic, greenhouse gases) will be used to decipher climatic drivers of Holocene monsoon dynamics.

在第二个资助期（12个月），我们建议：（1）对青藏高原（TP）现代介形类进行耦合的现实生态学和分类学分析，利用物种组合和外壳化学来检测湖泊水位变化对季风动力学，融水供应和降水与蒸发率的变化的响应（2）过去大约年至十年的分辨率。1000年从湖杯公司，Ra'og公司和坦格拉百胜公司位于沿着东西断面范围约。101°E至86°E，和（3）十年至百年的分辨率从湖Tangra Yum Co和黑海，以评估长期的环境变化和短期事件在晚更新世和全新世。在TP的南部和北方战略性地选择湖泊站点，以检测不同的季风气团影响。介形虫化石组合的环境解释将基于生态容忍度、偏好和传递函数。代理数据推断的区域水文季风发展的影响将进行比较，在选定的网站在过去的7000年的统计降尺度的结果。GCM模拟与外部强迫参数（轨道，太阳，火山，温室气体）的不同组合被迫将用于破译全新世季风动力学的气候驱动因素。