Physical Model of the Mississippi Sound and Bight from 2016-03-15 to 2016-05-13 with Low-Passed Meteorological Forcing and Eulerian Dye Tracer Releases for Residence Time Assessment

Model output of circulation, water mass and dynamical properties (currents, temperature, salinity, and sea level) for the Mississippi Bight and Mississippi Sound region of the northern Gulf of Mexico. The model application was developed as part of the GOMRI-funded CONCORDE consortium and has been configured with 400 m horizontal spatial resolution and 24 vertical layers. Observed freshwater input derived from available tide gauge stations are applied as riverine forcing, and Naval Research Laboratory-Naval Coastal Ocean Model (NRL-NCOM) output at 1km was used as outer boundary condition forcing. Surface atmospheric forcing is a low-passed (24-hour filtered) version of the 1km hourly product that was also developed as part of the CONCORDE consortium’s modeling component (the CONCORDE Meteorological Analysis- CMA). This filtering removes high-frequency meteorological forcing, such as diurnal sea breeze, allowing for scenario testing that reveals the impact of high-frequency winds on estuarine – shelf exchange. The model output in this dataset provides a daily resolution of physical parameters (currents, temperature, salinity, water levels) for the time frame around the Spring 2016 sampling campaign of the CONCORDE observational teams (2016-03-15 to 2016-05-13). The output provided also has seven regions of Eulerian dye tracer releases. The dye was released over the entire water column with a concentration of 1 for each of the regions: seaward of the Mississippi-Alabama Barrier Islands, seaward of the Chandeleur Barrier Islands, Mississippi Sound, Mississippi Bight, seaward of the Mississippi-Alabama Barrier islands that include the mouth of Mobile Bay, the Chandeleur Sound, and Mobile Bay. The dye was released as a passive tracer whose transport equation is the same as for salt-balance equation involving advective and diffusive transport and source-sink terms and does not influence the density field.本数据集涵盖墨西哥湾北部密西西比湾（Mississippi Bight）与密西西比海峡（Mississippi Sound）区域的环流、水团及动力属性（海流、水温、盐度与海平面）的数值模式输出结果。该模式应用由GOMRI资助的CONCORDE联盟开发，配置为400米水平空间分辨率与24层垂直分层。 观测得到的淡水输入源自可用验潮站数据，作为河流径流强迫项；同时采用1千米分辨率的美国海军研究实验室-海岸海洋模式（Naval Research Laboratory-Naval Coastal Ocean Model, NRL-NCOM）输出结果作为外边界强迫条件。 地表大气强迫为经24小时低通滤波后的1千米逐小时气象产品，该产品同样由CONCORDE联盟的模拟组分——CONCORDE气象分析系统（CONCORDE Meteorological Analysis, CMA）开发。此滤波操作可去除高频大气强迫信号（如昼夜海陆风），用于开展情景试验以揭示高频风场对河口-陆架交换过程的影响。 本数据集的模式输出以日分辨率提供物理参数（海流、水温、盐度、水位），时间覆盖CONCORDE观测团队2016年春季采样活动前后时段（2016-03-15至2016-05-13）。本次输出还包含7个区域的欧拉型染料示踪剂释放试验：分别在密西西比-阿拉巴马障壁群岛外侧、尚德勒尔障壁群岛外侧、密西西比海峡、密西西比湾、包含莫比尔湾河口的密西西比-阿拉巴马障壁群岛外侧、尚德勒尔海峡以及莫比尔湾这7个区域的整个水层释放浓度为1的示踪剂。该染料作为被动示踪剂，其输运方程与包含平流、扩散输运及源汇项的盐度平衡方程一致，且不会对密度场产生影响。