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

智利南部的大陆边缘...提供了独特的机会，研究南半球的古环境变化，在全新世和晚冰期的短，十年到百年的时间尺度。我们建议从42 °S和50°S之间的纬度样带中恢复4个长CALYPSO活塞岩心，并从23°S的Mejillones湾恢复亚热带智利的另一个岩心。预计南部的核心将提供大陆气候变化的高分辨率记录，特别是南部西风带控制的降雨变化。根据南纬40 °至44°大陆坡短重力岩心的现有数据，沉积速率应足以记录下百年尺度的变化。再往南，在智利峡湾或附近的核心位置可以用来重建巴塔哥尼亚冰盖范围内的全新世和冰川消退的变化。此外，我们计划从梅希隆湾恢复一个长岩心，据报道，短岩心中有分层沉积物。这个亚热带地区可能捕获来自热带太平洋的气候信号，这将允许比较南部高纬度和热带对智利附近的十年至百年尺度气候和海洋变率的影响。

The southern Chilean continental margin... offers unique opportunities to study Southern Hemisphere 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 from a latitudinal transect between 42 and 50°S and an additional core off subtropical Chile from the Bay of Mejillones at 23°S. The southern cores are expected to provide high resolution records of continental climate changes, particularly rainfall variability controlled by the southern westerly wind belt. Based on available data from short gravity cores on the continental slope between 40 and 44°S, sedimentationsrates should be high enough to record subcentennial scale variations. Further south, core locations in or near the Chilean fjords can be used to reconstruct Holocene and deglacial changes in the extent of the Patagonian ice-sheet. In addition, we plan to recover a long core from Bay of Mejillones where laminated sediments are reported from short cores. This subtropical region likely captures climate signals originating from the Tropical Pacific which will allow to compare high southern latitude and tropical influences on decadal to centennial-scale climate and ocean variability off Chile.