Rebecca Woodgate (R) and Dan Naber prepare a mooring to be deployed into the Bering Strait on board the Russian ship Professor Khromov in this August 25, 2009 file photo. Russian and U.S. oceanographers studying the impact of global warming on the Bering Strait in late August enjoyed seas on some days that were so calm their ship made the only ripples. But the serenity of the seascape belied increasingly turbulent waters for scientific research as countries exert sovereignty over Arctic territory and Big Oil boosts exploration efforts.

To match feature USA-RUSSIA/ REUTERS/Jeff Jones/Files (UNITED STATES SCI TECH ENVIRONMENT)