| But most arctic sea ice consists of pack ice, broken sheets moved by wind and ocean currents. |
| A sprinkling of volcanic rock in the Pacific, they are 600 miles east of their nearest land mass, and beset on all sides by seven mighty ocean currents. |
| These drift on the ocean currents for about two weeks before the larval forms hatch, then sink to the reefs below and begin to feed. |
| The experimental tandem mission data will help scientists better detect and understand ocean currents, tides and eddies. |
| Wind patterns can predict ocean currents like the upwellings that fostered plankton, a clue to today's oil deposits. |
| As ocean currents head eastward across the Pacific, the plume is expected eventually to hit the West Coast of the United States. |
