Last glacial maximum/last deglacial South Pacific interannual to decadal climate variability - Sub-seasonal reconstructions from Tahiti reef corals

末次盛冰期/末次冰消期南太平洋年际至十年间的气候变化——塔希提岛礁珊瑚的次季节重建

基本信息

批准号：
28791619
负责人：
Professor Dr. Gerold Wefer
金额：
--
依托单位：
Department of Earth Science
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2006
资助国家：
德国
起止时间：
2005-12-31 至 2009-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/28791619?language=en
关键词：
Last glacial maximum last deglacial

项目摘要

We suggest opening time-windows of interannual to decadal climate variability in the South Pacific during the last gfacial maximum and the last deglaciation, by analysing fossil reef corals from Tahiti. The corals have been recovered during IODP Expedition 310 (October- November 2005), a Mission Specific Platform Expedition implemented by the European Consortium for Ocean Research Drilling (ECORD). A member of the science party is Thomas Felis. Individual corals grew continuously for periods of >100 years! We plan to generate subseasonally resolved reconstructions of changes in both temperature and hydrologic balance at the sea surface during time intervals between 21 to 10 kyr ago, based on oxygen isotope and Sr/Ca variations in coral skeletons. This study will provide unique insights into the dynamics of natural modes of atmosphere/ocean variability, such as the El Nino-Southern Oscillation and the Pacific Decadal Oscillation, under boundary conditions different from today, and addresses a major scientific objective of IODP Expedition 310. Comparing such coral based reconstructions with state-of-the-art climate model simulations might help to assess the validity of future greenhouse projections.

我们建议通过分析塔希提岛的化石珊瑚礁珊瑚，在上次gfacial最大值和最后一次脱气期间，南太平洋际气候变化的年度至际气候变化开放。在IODP Expedition 310（2005年10月至11月）期间，珊瑚已被回收，这是由欧洲海洋研究钻探联盟（ECORD）实施的特定特定于任务的平台探险。科学党的成员是托马斯·费利斯（Thomas Felis）。单个珊瑚不断增长超过100年！我们计划基于珊瑚骨骼中的氧同位素和SR/CA变化，在21至10 kyr的时间间隔内，在21至10 kyr的时间间隔内，在21至10 kyr的时间间隔内，在海面的温度和水文平衡变化的下进行了分辨的重建。这项研究将提供对大气/海洋变异性自然模式动态的独特见解，例如在与当今不同的边界条件下，在不同的边界条件下，埃尔尼诺 - 南方振荡和太平洋衰老振荡，并解决了IODP Expedition 310的主要科学目标310。比较基于珊瑚的重建，可以将这种基于珊瑚的重新构造与现行的气候模型相比，可以帮助您评估未来的验证。