Ocean cold as water at greater depths. Below the thermocline, water is very cold, ranging from −1 °C to 3 °C. Because this deep and cold layer contains the bulk of ocean water, the average temperature of the world ocean is 3.9 °C. If a zone undergoes dramatic changes in salinity with depth, it contains a halocline. If a zone undergoes a strong, vertical chemistry gradient with depth, it contains a chemocline. The halocline often coincides with the thermocline, and the combination produces a pronounced pycnocline. The deepest point in the ocean is the Mariana Trench, located in the Pacific Ocean
Somewhere Over the Rainbow/What a Wonderful World World." In 1993, five years after the original recording, Bertosa played the song for producer Jon de Mello while the two were completing work on "Facing Future", and de Mello decided to include it in the album as "Somewhere Over the Rainbow/What a Wonderful World". "Somewhere Over the Rainbow/What a Wonderful World" reached #12 on "Billboard"'s Hot Digital Tracks chart the week of January 31, 2004 (for the survey week ending January 18, 2004). According to the Israel Kamakawiwoʻole website, Universal Studios first became interested in using the song in the movie and on the soundtrack for "Meet Joe Black"