Dataset for: Offshore Spreading of Mississippi Waters: Pathways and Vertical Structure Under Eddy Influence

This dataset is based on archives from the high resolution (1/50 deg) Gulf of Mexico Hybrid Coordinate Ocean Model (GoM-HYCOM) model, which gives details on the fronts and filaments associated with the Mississippi River plume dynamics, as well as GoM mesoscale processes relevant to this study (in particular the LC frontal dynamics and their influence on plume transport. The fields are (1) Temperature and Salinity down to 1500m with 11 levels at 5, 10, 15, 25, 50, 100, 150, 300, 500, 1000, 1500m for August 2015, (2) transport of waters with salinity less than 35 (Sv) along sections at 25.5N from July 1 to Sep 30 of 2015, and (3) time series of mean Sea Surface Salinity (SSS) in 2015 over the areas of two observed Mississippi branches (Eastern;24.5N-28.5N, 87W-84W and Western;23N-28.5N, 92W-885W) and the Straits of Florida (23.2N-24.7N, 85W-81.25W) from a realistic case and two idealized cases (NoMR and NoMR/NoPrecip). Please note that NoMR case is without the Mississippi River discharge and NoMR/NoPrecip case is without the Mississippi River discharge and Precipitation. This dataset supports the publication: Androulidakis, Y., Kourafalou, V., Le Hénaff, M., Kang, H., Sutton, T., Chen, S., Hu, C., & Ntaganou, N. (2019). Offshore spreading of Mississippi waters: pathways and vertical structure under eddy influence. Journal of Geophysical Research: Oceans. doi:10.1029/2018jc014661

本数据集依托高分辨率（1/50°）墨西哥湾混合坐标海洋模式（Gulf of Mexico Hybrid Coordinate Ocean Model, GoM-HYCOM）的归档数据构建，该模式可细致刻画与密西西比河羽流动力学相关的锋面与丝状体结构，同时呈现本研究涉及的墨西哥湾中尺度过程——尤其是环流（Loop Current, LC）锋面动力学及其对羽流输运的影响。数据集包含三类数据场：(1) 2015年8月的温度与盐度场，垂向覆盖至1500米，共设11个深度层级，分别为5、10、15、25、50、100、150、300、500、1000、1500米；(2) 2015年7月1日至9月30日期间，沿25.5°N断面的盐度低于35的水体输运量（单位：斯维尔德鲁普，Sv）；(3) 2015年两个观测到的密西西比河分支（东支：24.5°N-28.5°N，87°W-84°W；西支：23°N-28.5°N，92°W-88.5°W）以及佛罗里达海峡（23.2°N-24.7°N，85°W-81.25°W）区域的平均海表盐度（Sea Surface Salinity, SSS）时间序列，数据涵盖1组现实模拟场景与2组理想模拟场景（无密西西比河径流场景[NoMR]、无密西西比河径流与降水场景[NoMR/NoPrecip]）。需说明的是，NoMR场景未纳入密西西比河径流入海过程，NoMR/NoPrecip场景则未纳入密西西比河径流入海及降水过程。本数据集支撑以下已发表学术成果：Androulidakis, Y.、Kourafalou, V.、Le Hénaff, M.、Kang, H.、Sutton, T.、Chen, S.、Hu, C. 与 Ntaganou, N.（2019）。《密西西比河径流的外海扩散：涡旋影响下的输运路径与垂向结构》，《地球物理研究杂志：海洋》。DOI:10.1029/2018jc014661