LOOP Current variability - its relation to meridional overturning circulation and the impact of Mississippi discharge

环流及其相关的涡旋脱落正在调节从加勒比海到大西洋的海洋热量和盐通量。它对密西西比河排放的干扰对墨西哥湾的区域气候和向北方高纬度地区的大规模输送都至关重要。通过结合国家的最先进的古海洋学和中尺度涡分辨数值模拟技术，我们研究了环流动力学和水文变化的海湾在最后一次冰消期和间冰期MIS 1和5，特别注重密西西比河淡水discharge.冰消期SST和SSS的变化在海湾似乎是相当连续的，显着大于在加勒比/大西洋暖池。表面清新发生在冰期和冰消冷事件，并与增强和向东定向密西西比河排放。在这个项目中，我们涉及到的持续和更强的冰消期的表面变暖的海湾涡脱落的发病和增加有关冰消期的海平面上升，尤卡坦海峡通流速度和大气环流的变化的环流。此外，我们调查了墨西哥湾环流的增强河流排放。

The Loop Current and its associated eddy-shedding is mediating the oceanic heat and salt flux from the Caribbean into the Atlantic Ocean. Its interference with Mississippi discharge are critical for both, regional climate in the Gulf of Mexico and large-scale transports towards high northern latitudes. By combining state-of-the-art paleoceanographic and meso-scale eddy-resolving numerical modeling techniques, we examine the Loop Current dynamics and hydrographic changes in the Gulf during the last deglaciation and interglacials MIS 1 and 5 with a special focus on the impact of Mississippifreshwater discharge.Deglacial SST and SSS changes in the Gulf appear to be rather continuous and significantly larger than in the Caribbean/Atlantic Warmpool. Surface freshening occurs during glacial periods and deglacial cool events and is related to enhanced and eastward directed Mississippi river discharge. In this project, we relate the continuous and stronger deglacial surface warming in the Gulf to the onset and increase of eddy-shedding by the Loop Current related to deglacial sea level rise, Yucatan Strait throughflow velocity, and changes in the atmospheric circulation. Further, we investigate enhancedfluvial discharge on the circulation in the Gulf of Mexico.