| The only physical process taken into account is advection of an inert infinitesimal parcel of air by atmospheric currents. |
| In cold advection the cyclonically rotating ascent to the right is opposed by decent forced by the linear pressure perturbation. |
| If not, the original advection currents may carry away newly formed ice crystals before they can form a continuous ice cover. |
| All of these moisture sources contribute to the formation of widespread radiation and advection fogs, especially in fall and late spring. |
| Stratus that forms because of advection usually has a cloud base of around 1500 feet, and fog has its cloud base at the ground. |
| For the same reason, the FPIC scheme has also been tested for passive advection on the sphere. |
