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南半球在十年至百年时间尺度上的古环境变化提供了独特的机会。我们建议在42°至50°S的纬度断面上回收4个卡利普索活塞芯，并在南纬23°的梅吉隆斯湾附近的智利亚热带海域恢复一个额外的芯。南部芯有望提供大陆气候变化的高分辨率记录，特别是受南部西风带控制的降水变率。根据40°至44°S之间大陆斜坡上短重力岩心的现有数据，沉积速率应该足够高，足以记录下百年的尺度变化。再往南，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盖范围内的全新世和退冰期变化。此外，我们计划在梅吉洛内湾开采一个长岩心，据报道，在那里有来自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南部高纬度和热带对智利附近十年至百年尺度气候和海洋变异性的影响。

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.