Shelf Regional Ocean Modeling System (ROMS-Shelf) 2003-2011 Hindcast for the Texas-Louisana Shelf.

The model simulation spans the period from 1 February 2003 to 1 January 2012. The initial and open boundary conditions are obtained from the Gulf of Mexico Hybrid Coordinate Ocean Model (GOM-HYCOM) (http:\\www.hycom.org) covering the entire GOM. This nesting gives a reasonable representation of Loop Current eddies in the model. Atmospheric forcing includes 3-hourly u- and v- components of wind speed, shortwave radiation, air temperature, air pressure, relative humidity, cloud and precipitation from the North American Regional Reanalysis (NARR) dataset, which is available at a spatial resolution of 32~km. Fresh water fluxes from the Mississippi and Atchafalaya rivers are taken from daily values of Mississippi River transport at Tarbert Landing by the U.S. Army Corps of Engineers, and river discharge from the other seven rivers (the Nueces, San Antonio, Lavaca, Brazos, Trinity, Sabine and Calcasieu Rivers) are obtained from the U.S.G.S Real-Time Water Data for the Nation. This model does not contain tides, since previous studies have shown that tides are generally weak on the Texas-Louisiana shelf and only make a small contribution to the sea surface elevation and coastal currents (DiMarco, S. F., and R. O. Reid (1998), Characterization of the principal tidal current constituents on the Texas-Louisiana shelf, J. Geophys. Res., 103(C2), 3093–3109, doi:10.1029/97JC03289).

本模型模拟时段为2003年2月1日至2012年1月1日。初始场与开边界条件取自覆盖整个墨西哥湾（Gulf of Mexico，GOM）的墨西哥湾混合坐标海洋模型（Gulf of Mexico Hybrid Coordinate Ocean Model，GOM-HYCOM，http://www.hycom.org）。该嵌套方案可使模型合理表征墨西哥湾环流涡旋的相关特征。大气强迫数据取自北美区域再分析（North American Regional Reanalysis，NARR）数据集，包含每3小时输出的风速纬向（u）与经向（v）分量、短波辐射、气温、气压、相对湿度、云量与降水，该数据集空间分辨率为32公里。密西西比河与阿查法拉亚河的淡水通量取自美国陆军工程兵团（U.S. Army Corps of Engineers）在塔伯特登陆点测得的密西西比河日输运量；其余7条河流（努埃塞斯河、圣安东尼奥河、拉瓦卡河、布拉索斯河、特里尼蒂河、萨宾河与卡尔克苏河）的径流量数据取自美国地质调查局（U.S. Geological Survey，USGS）全国实时水数据系统。本模型未考虑潮汐过程，此前研究表明，德克萨斯-路易斯安那陆架区域的潮汐普遍较弱，仅对海面高度与近岸流场存在微弱影响（DiMarco S.F.与Reid R.O.，1998：《德克萨斯-路易斯安那陆架主要潮汐分潮特征》，《地球物理学研究杂志》，103(C2)，3093–3109，doi:10.1029/97JC03289）。