EarthShape - BOFEDAL: Biota's forcing of earth surface dynamics ascertained on land and sea

EarthShape - BOFEDAL：在陆地和海洋上确定生物群对地球表面动力学的强迫

• 批准号: 280528655
• 负责人: Dr. Bertil Mächtle
• 金额: --
• 依托单位: Institut für Geographiedidaktik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/280528655?language=en
• 关键词: EarthShape; BOFEDAL; Biota; forcing; earth

One of the main goals of EarthShape is the quantification of biotic processes, which modify the earth shape in the critical zone. Besides monitoring of modern processes and its modelling, the low intensity of some biotic processes in the Atacama Desert needs a period of consideration of at least tens to thousands of years to be measurable. Biotic processes in the (recently hyper-)arid Atacama desert are most prominently controlled by the availability of water. As precipitation was highly variable at these timescales, the modification and volatility of process intensities on the scale of decades to millennia, due to climatic changes, has to be considered in quantitative approaches. Paleoclimatic information on these timescales is strongly recommended. Paleoclimatic archives as peat and mineral sediments offer an insight to past environments based on climatic proxies, e.g. micro-/macrofossils, sediments and its geochemistry. However, highly variable arid land bio-geodynamics prevent the formation of continuous archives, which the EarthShape approach calls for! Therefore, those priority program primary focus areas located in the hyper-arid costal desert of Chile only offer discontinuous records of paleoclimate. Existing gaps in paleoclimatic records need framing and completion by the nearest continuous information, which has to be made available by studying the regional paleoclimatic context. In our project, we aim to study the activity of biota in the coastal area during the mid- to late Holocene (primary focus area Pan de Azucar, 26° S). Paleoclimatic records at these areas are expected to be discontinuous and lack resolution. Hence, the acquisition of undistorted, continuous information will be done by the study of two framing master records: the study of a high Andean peatland (bofedal) and adjacent lake and the study of a marine sediment core (GeoB 7139-2, 30° S off Chile). By this means, we want to fill the unavoidable gaps in coastal sedimentary archives with the help of continuous high-resolution paleoclimatic proxy data to get the best possible assessment of changes in biota-controlled processes and their intensity in north central Chile, where detailed Holocene paleoclimatic information is missing. In summary, this project is integrated in priority program 1803 by providing essential information which was asked for by many groups to reach their individual goals, as stated during the EarthShape workshop 2014 in Potsdam. Therefore, this interdisciplinary project between geoecology, geography/geomorphology and marine geosciences is by itself a cutting-edge integrative collaboration, bringing together terrestrial and marine expertise under the umbrella of EarthShape. Furthermore, immediate linkages to other initiatives are obvious, particularly regarding vegetation dynamics, soil formation, biochemical weathering and stabilization of landscapes most notably in the primary focus area Pan de Azucar.

地形的主要目标之一是量化生物过程，该过程改变了临界区域中的地球形状。除了监测现代过程及其建模外，Atacama沙漠中某些生物过程的低强度还需要一段时间来考虑至少数十至数千年的时间。 （最近）干旱的Atacama沙漠中的生物过程最为明显地由水的可用性控制。由于在这些时间尺度上的降水量高度可变，因此必须在定量方法中考虑过程强度数十年来数十年来数十年的变化和波动性。强烈建议使用这些时间尺度的古气候信息。古气候档案作为泥炭和矿物沉积物为基于杂物代理的过去环境提供了见识，例如微化石，沉积物及其地球化学。但是，高度可变的干旱土地生物地形动力学可以防止形成连续的档案，而Earthshape方法要求！因此，位于智利高级哥斯群沙漠中的那些优先计划的主要焦点区域仅提供古气候的不连续记录。古气候记录中的现有差距需要通过最近的连续信息进行框架和完成，必须通过研究区域古气候环境来获得。在我们的项目中，我们旨在研究全新世晚至晚期沿海地区生物群的活性（主要重点区域pan de azure，26°S）。预计这些地区的古气候记录将是不连续的，并且缺乏分辨率。因此，通过研究两个框架主记录的研究将获得统一的持续信息：对安第斯泥炭地（Bofedal）和邻近的湖泊的研究以及对海洋沉积物核心的研究（Geob 7139-2，30°S OFF辣椒）。通过这种方式，我们希望借助连续的高分辨率古气候代理数据来填补沿海沉积档案中的不可避免的空白，以最佳评估生物群体控制过程的变化及其在中部辣椒中部的强度的变化，在那里缺少了详细的全新式古气候信息。总而言之，该项目通过提供基本信息来整合到Priority计划1803中，许多小组要求实现其个人目标，如Potsdam的Earthshape Workshop时期所述。因此，地球学，地理/地貌学和海洋地球科学之间的这个跨学科项目本身就是一个尖端的综合合作，将陆地和海洋专业知识融合在一起。此外，与其他倡议的立即联系是显而易见的，尤其是关于蔬菜动态，土壤形成，生化风化和景观的稳定，最值得注意的是在Azucar的主要焦点区域中。