HYCOM surface velocity fields for the Gulf of Mexico and the Florida Straits at 1km resolution for January 2014 and July 2014

The HYbrid Coordinate Ocean Model (HYCOM) is configured for the entire Gulf of Mexico. HYCOM uses isopycnal coordinates in the deep stratified ocean, pressure coordinates in unstratified regions including the mixed layer, and terrain-following coordinates in shallow coastal regions. The simulation has 20 layers in the vertical and 1/100 degree horizontal resolution. The flow is forced by six-hourly Navy Operational Global Atmospheric Prediction System (NOGAPS) surface winds and heat fluxes. Cyclic boundary conditions south of the Yucatan Channel and in the Florida Straits are provided by a synoptically-forced 1/12 degree Atlantic HYCOM configured for much of the Atlantic Ocean, from 30S to 70N. The results from this larger domain simulation are obtained for years 1999-2002 and binned into monthly values to create a perpetual forcing and boundary conditions for the Gulf of Mexico inner domain. Rivers are represented by point sources forced towards monthly climatological freshwater inflows taken from the USGS. Further details of the model configuration can be found in Prasad and Hogan (2007). The k-Profile parameterization (KPP; Large et al., 1994) is used to invoke vertical mixing. This is a special run at 1 km for January 1-11 2014 and July 1-11 2014. Files are calculated mean surface velocities for an expanding window for every 3, 6, 9, 12, 15, 18, 21, and 24 hours which repeats for every day represented by the variable tau in the NetCDF files. NetCDF files naming convention indicates the start and end date in the file names. This dataset supports the publication: Drouin, K. L., Mariano, A. J., Ryan, E. H., & Laurindo, L. C. (2019). Lagrangian simulation of oil trajectories in the Florida Straits. Marine Pollution Bulletin, 140, 204–218. doi:10.1016/j.marpolbul.2019.01.031混合坐标海洋模型（HYbrid Coordinate Ocean Model, HYCOM）针对整个墨西哥湾海域完成配置。该模型在深层层化海洋中采用等密度坐标，在包含混合层的非层化区域采用气压坐标，在浅海沿岸区域采用地形追随坐标。本次模拟垂直方向共设置20层，水平分辨率为1/100度。流场由每6小时更新一次的海军作战全球大气预报系统（Navy Operational Global Atmospheric Prediction System, NOGAPS）表面风场与热通量进行强迫。尤卡坦海峡以南及佛罗里达海峡的循环边界条件，由覆盖南纬30°至北纬70°大西洋大部海域的同步强迫型1/12度大西洋HYCOM提供。该大域模拟的结果取自1999-2002年，经按月分箱处理得到逐月气候态数据，以此作为墨西哥湾内域的持续强迫场与边界条件。河流以点源形式表征，其强迫流量取自美国地质调查局（United States Geological Survey, USGS）的逐月气候态淡水入流量。有关模型配置的更多细节可参阅Prasad与Hogan（2007）的研究。垂直混合过程采用k剖面参数化方案（k-Profile parameterization, KPP; Large et al., 1994）。本数据集还包含2014年1月1日至11日、7月1日至11日的1公里分辨率特殊模拟试验。针对NetCDF文件中变量τ所代表的每日时段，本数据集以扩展滑动窗口计算3、6、9、12、15、18、21、24小时时长下的平均表面流速，该计算过程逐日循环重复。NetCDF文件的命名规则包含文件的起始与结束日期。本数据集支撑以下学术出版物：Drouin, K. L., Mariano, A. J., Ryan, E. H., & Laurindo, L. C. (2019). 佛罗里达海峡内油粒轨迹的拉格朗日模拟. 海洋污染通报, 140, 204–218. doi:10.1016/j.marpolbul.2019.01.031