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

0000394罗伯逊国际研究员奖计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。 该计划的奖项提供了联合研究的机会，以及使用独特或互补的设施，专业知识和国外的实验条件。该奖项将支持博士罗宾罗伯逊为期12个月的博士后研究访问，与博士哈特穆特H。这项研究的目标是调查潮汐在罗斯海混合和南极底层水形成中的作用。 将利用逼真的水深测量和水文测量模拟罗斯海的潮汐速度结构，包括冰架下的潮汐速度结构。 模拟将使用sigma坐标模型的并行化版本。 四个最大的潮汐分量（两个半日潮和两个全日潮）将分别模拟和组合。 预期的结果将包括三维潮汐速度场的估计。 由于潮汐混合的粗参数化也将开发用于更大规模的环流模式。 将研究使用多种潮汐成分和不同水文假设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适合与参与南极研究的其他欧洲机构，如英国南极调查局、威尼斯的一个意大利小组和卑尔根的一个挪威小组开展合作，从而增加了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.***