41. Solving the advection equation by numerical methods is very challenging and there is a large scientific literature about this. 42. The majority of the ocean heat flux is through advection or the movement of the ocean's currents. 43. It has not been agreed upon whether this is due to the divergent portion of the wind or vorticity advection . 44. Thus, the success of a VOF method depends heavily on the scheme used for the advection of the field. 45. The " Langevin equation " describes advection , diffusion, and other phenomena in an explicitly stochastic way. 46. Without the additional dispersion modules, Hysplit computes the advection of a single pollutant particle, or simply its trajectory. 47. This results in the total rate of transport for the system being influenced by both factors, diffusion and advection . 48. Similarly, warm advection ( or WA for short ) also results in a negative \ omega corresponding to ascending motion. 49. Therefore, these effects cannot be described as a " bulk " transport and differ from advection or convection. 50. Oceanic and atmospheric gyres were able to strengthen in the subtropical Atlantic, allowing southward advection of cold air and water.
