SIOPACT - Developing a ~250 year climate record for the Southeastern Indian Ocean sector of the Indo-PACific warm pool and its global climate Teleconnections

SIOPACT - 为印度-太平洋暖池东南印度洋部分及其全球气候遥相关开发约 250 年的气候记录

• 批准号: 382553361
• 负责人: Professor Dr. Jens Zinke, Ph.D.
• 金额: --
• 依托单位: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/382553361?language=en
• 关键词: SIOPACT; Developing; 250; year; climate

Lack of long instrumental climate records from the eastern Indian Ocean and Indo-Pacific warm pool, the heat engine of the global climate system and an essential player in circum-tropical/extratropical rainfall/drought variability, is the main problem for reducing uncertainties in model-based climate change process studies and to successfully plan for a future warmer world. We propose to develop new ~250 year long, absolutely dated and seasonally-resolved reconstructions of sea surface temperature and salinity with unprecedented temporal and spatial coverage from key sites in the southeastern Indian Ocean sector of the Indo-Pacific warm pool. These will help to close the biggest current marine climate data gap in the Indo-Pacific warm pool that is of paramount importance to global climate variability and to circum-Indian Ocean societies. Towards this aim our project will develop geochemical records from long-lived massive corals that can be used to quantify past fluctuations of SST and salinity. Outcomes of this project will produce critical environmental and climatic baselines on past and current behavior of the Indo-Pacific warm pool and its interaction with Indian Ocean and tropical Pacific climate phenomena over more than two centuries, e.g. Indian Ocean warming, El Niño-Southern Oscillation and (multi)decadal variability. Ultimately, we will test the following hypothesis: 1) The spatio-temporal occurrence of marine heat waves and the ultimate expansion of the Indo-Pacific warm pool at the southeastern Indian Ocean reefs off northwest Australia is related to distinct oceanic and atmospheric forcing by the western Pacific temperature gradient during El Niño, La Niña and ENSO neutral years modulated by Pacific decadal variability. 2) Tropical Indian Ocean warming is an independent pacemaker of interannual and decadal climate anomalies. 3) SST in the southeastern Indian Ocean and the expansion of the warm pool is of paramount importance for tropical climate anomalies and in driving heat waves and drough/rainfall variability across the Austral-Asian tropics and extratropics.

缺乏来自东印度洋和印度太平洋温暖池的长期器乐气候记录，全球气候系统的热引擎以及环游/热带/干旱降雨/干旱变化的重要参与者，是减少基于模型的气候变化过程中不确定性的不确定性的主要问题，并成功地计划了未来的温暖世界。我们建议开发新的〜250年，绝对过时的且季节性分辨的海面温度和盐度重建，并从印度太平洋温暖池的印度洋东南部地区的主要地点进行前所未有的临时和空间覆盖。这些将有助于弥合印度太平洋暖游泳池中当前最大的海洋气候数据差距，这对全球气候变异性和环境海洋社会至关重要。为了实现这一目标，我们的项目将从长寿命的巨大珊瑚中开发地球化学记录，这些记录可用于量化SST和盐度的过去波动。该项目的结果将在印度太平洋温暖池的过去和当前行为以及与印度洋和热带太平洋气候现象的相互作用上产生关键的环境和民用基线，例如两个以上的时间，例如印度洋变暖，厄尔尼诺南 - 南方振荡和（多）衰老变异性。最终，我们将检验以下假设：1）海洋热浪的时空发生以及澳大利亚西北部印度海洋礁的印度海洋礁的印度太平洋暖池的最终扩展与西部太平洋温度梯度在ElNiño，Enso中心型中的西方太平洋温度梯度和中度的中性级别均与中太平洋温度的不同之处有关。 2）印度洋热带变暖是年际气候异常和衰老气候异常的独立起搏器。 3）在印度洋东南部的SST和温暖游泳池的扩张对于热带气候异常以及驱动热浪以及澳大利亚热带热带和室外化学的drough/降雨变化至关重要。