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Key Processes in the Holocene Evolution of Tropical Coasts - Evaluating the Role of Hurricanes and Tsunamis

热带海岸全新世演化的关键过程 - 评估飓风和海啸的作用

基本信息

批准号：
40792228
负责人：
Professor Dr. Helmut Brückner
金额：
--
依托单位：
School of Environment, Science and Engineering
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2007
资助国家：
德国
起止时间：
2006-12-31 至 2009-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/40792228?language=en
关键词：
Key Processes Holocene Evolution Tropical

项目摘要

Being a coral island situated in the semi-arid tropics, Bonaire (Netherlands Antilles) is excellently suited as bio- and geoarchive for studying the record of extreme events. Alt such signatures stored in ramparts, rubble ridges, boulder fields, etc. are well datable by 14C-AMS and ESR with high precision. Moreover, Bonaire's lagoonal systems and near shore lakes contain continuous sedimentary records since approx. 6000 yrs BP. The project aims to identify the driving forces responsible for the Holocene evolution of Bonaire's tropical limestone coast and its ecosystems. The impact of sudden and high-magnitude extreme events (hurricanes and tsunamis) is compared to steady, continuous and low-magnitude (non-extreme) forming processes. To achieve this goal the Holocene history for both process types is deciphered by the analysis of sediment cores in near shore geoarchives and the study of coarse deposits onshore. The geochronological framework is built by ESR and Radiocarbon dating. The response of the coastal ecosystems (coral reefs, mangroves) to extreme events in terms of adaptation/regeneration, phase shifts or extinction is a vital component of the project. Near shore bio-geoarchives store marine and terrestrial records. Their interrelationship will be studied with a multi-proxy approach. Overall, we aim to establish the island of Bonaire as a prototype region for tropical coasts where extreme events act as key processes in the coastal evolution.

博内尔岛（荷属安的列斯群岛）是一个位于半干旱热带地区的珊瑚岛，非常适合作为研究极端事件记录的生物和地理档案。所有这些特征都可以用~（14）C-AMS和ESR进行高精度定年。此外，博内尔岛的泻湖系统和近海岸湖泊包含连续的沉积记录，因为大约。6000年BP。该项目旨在确定博内尔岛热带石灰岩海岸及其生态系统全新世演变的驱动力。突发和高强度极端事件（飓风和海啸）的影响与稳定，连续和低强度（非极端）形成过程进行了比较。为了实现这一目标，这两种过程类型的全新世历史被破译的分析，沉积物岩心在近海岸地质档案和陆上粗沉积物的研究。利用ESR和放射性碳测年建立了本区的年代学框架。沿海生态系统（珊瑚礁、红树林）在适应/再生、阶段转移或灭绝方面对极端事件的反应是该项目的一个重要组成部分。靠近海岸的生物地质档案馆保存着海洋和陆地的记录。将采用多代理方法研究它们之间的相互关系。总体而言，我们的目标是建立博内尔岛作为热带海岸的原型区域，极端事件作为沿海演变的关键过程。