Decadal to centennial-scale climate variability during the Holocene and Late Glacial based on long CALYPSO cores off southern and subtropical Chile

基于智利南部和亚热带地区长 CALYPSO 核心的全新世和晚冰期期间十年至百年尺度的气候变化

• 批准号: 5444676
• 负责人: Professor Dr. Dierk Hebbeln
• 金额: --
• 依托单位: Präsident
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5444676?language=en
• 关键词: Decadal; centennial; scale; climate; variability

The southern Chilean continental margin... offers unique opportunities to study SouthernHemisphere paleoenvironmental changes during the Holocene and the late glacial on short,decadal to centennial time-scales. We propose to recover 4 long CALYPSO piston cores froma latitudinal transect between 42 and 50°S and an additional core off subtropical Chile fromthe Bay of Mejillones at 23°S. The southern cores are expected to provide high resolutionrecords of continental climate changes, particularly rainfall variability controlled by thesouthern westerly wind belt. Based on available data from short gravity cores on thecontinental slope between 40 and 44°S, sedimentationsrates should be high enough to recordsubcentennial scale variations. Further south, core locations in or near the Chilean fjords canbe used to reconstruct Holocene and deglacial changes in the extent of the Patagonian icesheet.In addition, we plan to recover a long core from Bay of Mejillones where laminatedsediments are reported from short cores. This subtropical region likely captures climatesignals originating from the Tropical Pacific which will allow to compare high southernlatitude and tropical influences on decadal to centennial-scale climate and ocean variabilityoff Chile

智利南部的连续边缘...提供了独特的机会，可以在全新世期间研究南方人的古环境变化，而在短期，十年中至百年纪念时间量表中的冰川期晚期。我们建议从42至50°S之间的纬度样带中回收4个长的Calypso活塞核，并从23°S的Mejillones海湾中脱离亚热带辣椒的附加核心。预计南部核心将提供大陆气候变化的高分辨率，尤其是由南部西部风带控制的降雨变化。基于来自40至44°S之间的大陆斜率的短重力核心的可用数据，沉积物应足够高到足以记录较小的尺度变化。更南部，智利峡湾内或附近的核心位置可以用来重建全新世和冰流变化。这个亚热带地区可能捕获源自热带太平洋的气候，这将允许比较高的南纬度和热带影响对十年的气候与百年纪念级气候和海洋可变性。