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
Woods III: The Deepest Roots and Darkest Blues following the album's release. A music video for "The Northern Cold" was released in 2007 featuring the performers on "Woods III", along with then-members Shawn Stoneman on guitar & Chris Mezzabotta on drums, neither of which performed on any Woods of Ypres albums. Woods III: The Deepest Roots and Darkest Blues Woods III: The Deepest Roots and Darkest Blues is the second full-length album by Woods of Ypres. It was recorded in 2007 in Toronto, Ontario, and it was the band's last album released before relocating to Sault Ste. Marie, Ontario in 2008. "Woods III" marked the band's only album