Ocean acoustic tomography water formation and the gyre circulation. Other applications include the measurement of ocean tides, and the estimation of ocean mesoscale dynamics by combining tomography, satellite altimetry, and in situ data with ocean dynamical models. In addition to the decade-long measurements obtained in the North Pacific, acoustic thermometry has been employed to measure temperature changes of the upper layers of the Arctic Ocean basins, which continues to be an area of active interest. using data from acoustic pulses sent from one end of the earth to the other. Acoustic thermometry is an idea to observe the world's ocean basins, and the
The Greatest Race on Earth The Greatest Race on Earth in July 2009, bringing the competition to a close. The Greatest Race on Earth The Greatest Race on Earth (GROE) was a four-part series of marathon races in a relay format, which included the Nairobi Marathon, Singapore Marathon, Mumbai Marathon and Hong Kong Marathon. It was created and sponsored by Standard Chartered in 2005. The total prize pool for the 2006–07 series was US$1.5 million. The competition was won by the team of four athletes who had the lowest cumulative time across the four marathons, with each team member competing in only one marathon as