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The last deglacial sea-level & climate changes.Coral reef records in Checreef: South Pacific: Tahiti (French Polynesia) IODP expedition

最后一次冰消海平面

基本信息

批准号：
NE/F523318/1
负责人：
Alexander Tudhope
金额：
$ 2.2万
依托单位：
University of Oxford
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
起止时间：
2007 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FF523318%2F1
关键词：
last deglacial sea level climate

项目摘要

The timing and course of the last deglaciation (23,000-6,000 calendar years BP - cal. yr BP) are essential components for understanding the dynamics of large ice sheets and their effects on Earth's isostasy as well as the complex relationship between freshwater fluxes to the ocean, thermohaline circulation and, hence, global climate during the Late Pleistocene and the Holocene. This proposal is related to the IODP proposal #519 concerning the coral reef records of Tahiti and the Australian Great Barrier Reef to establish the course of sea-level rise, climate variability and reef response during the last deglaciation. It includes : 1) the study of more than 600 m of reef cores with an exceptional recovery that were retrieved from 37 holes ranging from 40 to 120 m water depth around Tahiti during the IODP Expedition #310 « Tahiti Sea Level ». Distinctive levels of relict reefs covering most, if not all, the last deglaciation were drilled and therefore confirmed the significance of these features as unique archives of abrupt global sea-level rise and climate change. 2) Complimentary investigations of the Tahiti reef slopes, and 3) a site survey cruise on the Great Barrier Reef to generate high resolution bathymetric and seismic data that will be used to select suitable targets for an IODP drilling expedition corresponding to the part 2 of the IODP drilling proposal #519. The general scientific objectives of this proposal are threefold : a. To establish the course of post-glacial sea-level rise during the Last Deglaciation . b. To define SSTs and SSSs variations during the Last Deglaciation when solar insolation, sea level, and atmospheric CO2 levels were different from today. c. To analyze the impact of sea-level and environmental changes on reef development during the Last Deglaciation, with a special emphasis on the comprehensive reconstruction of environmental changes.

最后一次冰消的时间和过程（23，000 - 6，000日历年BP - cal. yr BP）是了解大冰盖动态及其对地球等渗线的影响以及晚更新世和全新世期间流入海洋的淡水通量、温盐环流和全球气候之间复杂关系的重要组成部分。该提案与国际海洋学发展计划关于塔希提岛和澳大利亚大堡礁珊瑚礁记录的第519号提案有关，目的是确定最后一次冰消期间海平面上升、气候变化和珊瑚礁反应的过程。它包括：1）在IODP Expedition #310 « Tahiti Sea Level »期间，从塔希提岛周围水深40至120米的37个孔中回收了超过600米的珊瑚礁岩心，并对其进行了研究。对覆盖最后一次冰消期的大部分（如果不是全部的话）残礁的独特水平进行了钻探，因此证实了这些特征作为全球海平面突然上升和气候变化的独特档案的重要性。2)对大溪地礁斜坡进行补充调查，以及3）对大堡礁进行现场调查巡航，以生成高分辨率测深和地震数据，这些数据将用于为IODP钻探勘探选择合适的目标，对应于IODP钻探建议书#519的第2部分。该提案的总体科学目标有三个方面：a.建立末次冰消期冰后期海平面上升的过程。B.在末次冰消期，当太阳辐射、海平面和大气CO2水平与今天不同时，确定SST和SSSS的变化。C.分析末次冰消期海平面和环境变化对生物礁发育的影响，特别强调环境变化的综合重建。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

From Corals to Canyons: The Great Barrier Reef Margin

从珊瑚到峡谷：大堡礁边缘

DOI：
10.1029/2008eo240002
发表时间：
2011
期刊：
Eos, Transactions American Geophysical Union
影响因子：
0
作者：
Webster J
通讯作者：
Webster J

Intensification of the meridional temperature gradient in the Great Barrier Reef following the Last Glacial Maximum.

DOI：
10.1038/ncomms5102
发表时间：
2014-06-17
期刊：
Nature communications
影响因子：
16.6
作者：
Felis T;McGregor HV;Linsley BK;Tudhope AW;Gagan MK;Suzuki A;Inoue M;Thomas AL;Esat TM;Thompson WG;Tiwari M;Potts DC;Mudelsee M;Yokoyama Y;Webster JM
通讯作者：
Webster JM

Assessing subsidence rates and paleo water-depths for Tahiti reefs using U-Th chronology of altered corals

使用蚀变珊瑚的 U-Th 年表评估塔希提岛珊瑚礁的沉降率和古水深