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

智利南部大陆边缘为研究全新世和晚冰期的南半球古环境变化提供了独特的机会，时间跨度短，从十年到百年。我们建议从42 ~ 50°S的纬向样带恢复4个长CALYPSO活塞岩芯，并从23°S的Mejillones湾恢复另一个位于亚热带智利附近的岩芯。预计南部岩心将提供大陆气候变化的高分辨率记录，特别是由南部西风带控制的降雨变率。根据40°S到44°S之间大陆斜坡上的短重力岩心的现有数据，沉积速率应该足够高，足以记录次百年尺度的变化。再往南，在智利峡湾内或附近的核心位置可以用来重建巴塔哥尼亚冰原范围内的全新世和去冰期变化。此外，我们计划从Mejillones湾回收一个长岩心，在那里报告了短岩心的层状沉积物。这个亚热带地区可能捕捉到来自热带太平洋的气候信号，这将使我们能够比较高纬度南纬和热带对智利近海十年至百年尺度气候和海洋变化的影响

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