| Surface fires then are lit to kill off saplings, reduce fuel loads, enrich the soil with nutrients, and bring fire back to the forest. |
| Surface flow normally begins in just a few areas, especially dips or hollows near the stream. |
| Surface water bodies like ponds and tanks are the perennial breeding sources. |
| Surface wind at the time of the rollback of the gantry surrounding the Boeing Delta II launch vehicle was as high as 36 knots. |
| Surface geothermal manifestations include hot steaming ground, fumaroles, mud pools, and warm to boiling hot springs. |
| Surface pressure and surface potential isotherms were directly acquired during the measurement. |
