HYCOM simulation ensemble for quantifying uncertainties in ocean circulation responses to random initial and wind forcing conditions using Polynomial Chaos (PC) expansion

This dataset is generated using the HYbrid Coordinate Ocean Model (HYCOM) for the purpose of uncertainty quantification study in the Ocean General Circulation Modeling (OGCM). The configuration adopted here is similar to the one used operationally by the US Navy for ocean prediction during the period 2003–2014. It has a 4-km horizontal resolution and 20 vertical levels. The computational domain is open along portions of its southern, eastern and northern boundaries, where values are provided by a lower-resolution (1/12◦ vs. 1/25◦) simulation of HYCOM configured for the Atlantic Ocean. The model is forced at the surface by three hourly outputs from the Coupled Ocean/Atmosphere Mesoscale Prediction (COAMP) System, which has a 27-km resolution. For the present study, the ocean circulation in the Gulf of Mexico between May-01 and May-30 were simulated using HYCOM with uncertain inputs (characterizing both random initial and wind forcing conditions). These simulations were run on Carver at the National Energy Research Scientific Computing Center (NERSC) during Sep 2014 and early 2015. A total of 798 HYCOM simulations were generated. This dataset supports the publication: Li, G., Iskandarani, M., Le Hénaff, M., Winokur, J., Le Maître, O.P. and Knio, O.M., 2016. Quantifying initial and wind forcing uncertainties in the Gulf of Mexico. Computational Geosciences, 20(5), pp.1133-1153.