International Research Fellow Awards Program: Three-Dimensional Variability of Tidal Currents in the Ross Sea and it's Effect on Mixing

[00:39 . 94]国际研究员奖励计划使美国科学家和工程师能够到国外进行3到24个月的研究。该计划的奖励为联合研究提供了机会，并利用独特或互补的设施、专业知识和国外的实验条件。该奖项将支持罗宾·罗伯逊博士进行为期12个月的博士后研究访问。Hartmut H. Hellmer和Aike Beckmann在德国不来梅港阿尔弗雷德-韦格纳研究所。本研究的目的是调查潮汐在罗斯海混合和南极底水形成中的作用。罗斯海的潮汐速度结构，包括冰架下，将利用现实的测深和水文模拟。模拟将使用sigma坐标模型的并行化版本。四个最大的潮汐组成部分（两个半日潮和两个日潮）将分别和组合进行模拟。预期的结果将包括三维潮汐速度场的估计。由于潮汐引起的混合的粗略参数化也将用于更大尺度的环流模式。研究了多种潮汐成分和不同水文情景对速度场和混合的影响。阿尔弗雷德-韦格纳研究所的地理位置非常理想，可以与其他参与南极研究的欧洲机构开展合作，例如英国南极调查局、威尼斯的意大利小组和卑尔根的挪威小组，从而增加与德国的国际合作的价值

0000394RobertsonThe International Research Fellow Awards Program enables U.S. scientists and engineers to conduct three to twentyfour months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twelve-month postdoctoral research visit by Dr. Robin Robertson to work with Drs. Hartmut H. Hellmer and Aike Beckmann at the Alfred-Wegener Institute in Bremerhaven, Germany.The goal of this research is the investigation of the role tides play in mixing and Antarctic Bottom Water formation in the Ross Sea. The tidal velocity structure for the Ross Sea, including under the ice shelf, will be simulated utilizing realistic bathymetry and hydrography. A parallelized version of a sigma coordinate model will be used for the simulation. The four largest tidal constituents (two semidiurnal and two diurnal) will be simulated both individually and in combination. The expected results will include estimates of the three-dimensional tidal velocity fields. A crude parameterization of the mixing due to tides will also be developed for use in larger scale circulation models. The effects using multiple tidal constituents and of different hydrographic scenarios on the velocity fields and mixing will be investigated.The Alfred-Wegener Institute is ideally situated to develop collaborations with other European institutions involved in Antarctic research, such as the British Antarctic Survey, an Italian group in Venice, and a Norwegian group in Bergen, adding to the value of this international collaboration with Germany.***