Collaborative Research: Sampling the Ocean - Sea Ice Interaction in the Pacific Center of the Antarctic Dipole

来自美国两家主要海洋学机构的研究人员将进一步研究东罗斯海环流上层海洋对所谓的“南极偶极子”气候模式（ADP）太平洋区域内海洋-海冰-大气反馈的响应。ADP是在海冰覆盖和海面温度中观测到的气候变率的年际模态。这种变率表现为太平洋（如罗斯海）和南大洋大西洋部分（如威德尔海）的异常之间的非相位关系。ADP也可能与中/东太平洋的气候异常有关（如厄尔尼诺-南方涛动）。将要进行的活动包括在罗斯海东部环流的太平洋ADP中心区域部署系泊设施，以解决从每日到年际不等的时间尺度上的上层海洋（50~500m）分层和速度。通过在系泊处顶部部署冰剖面声纳信标，将对海冰的覆盖范围和厚度进行同步测量。在部署期间，德国将继续同时努力并扩大威德尔环流的补充测量。整个测量工作有望增加我们对南大洋在半球空气-海冰系统中的作用以及与全球尺度气候变化的联系的理解。

Researchers from two leading US oceanographic institutions are to further investigate the response of the upper ocean of the eastern Ross Sea gyre to the ocean- sea ice - atmosphere feedbacks within the Pacific sector of the so-called 'Antarctic Dipole' climate pattern (ADP). The ADP is an interannual mode of climate variability observed in both sea ice cover and sea surface temperature. This variability appears as an out-of-phase relationship between anomalies in the Pacific (e.g. Ross Sea) and Atlantic sectors of the southern ocean (e.g. Weddell Sea). The ADP may also be linked to climatological anomalies seen in the central/eastern Pacific (e.g. El Nino Southern Oscillation, ENSO). Activities to take place include the deployment of moorings in the region of the Pacific ADP center in the eastern Ross Sea gyre to resolve upper ocean(50~500m) stratification and velocity over timescales ranging from daily to the interannual. By deploying ice profiling sonar beacons at the top of the moorings, collocated measurements of sea-ice coverage and thickness will be made. During the deployment period, simultaneous German efforts will continue and extend complementary measurements in the Weddell gyre. The total measurement effort promises to increase our understanding of the southern ocean's role in both the hemispheric air-sea ice system, and the connections to global scale climate variability.