Deep CTD cast on 6.19.2013.
Station Aloha is approximately 4800 meters deep. During the research cruise we took 2 CTD casts from the surface waters down to the very bottom. The deep ocean water is cold and salty making it very dense. At the surface the water is a balmy 25 degrees Celsius (77 degrees Fahrenheit) while at depth it is near freezing temperatures! The deep waters also have high oxygen because the deep ocean water comes from the cold, oxygen-rich deep waters from the poles. The water is transported by large ocean currents that connect all oceans. This is called thermohaline circulation. The movement of water is driven by density differences and is sometimes described as the "great ocean conveyer belt".
Sarah Q. Foster
Sarah is a 2nd year Ph.D. student in the Fulweiler Lab. This blog documents her experience taking a summer course "Microbial Oceanography: From genome to biome" at C-MORE at the University of Hawai'i at Manoa.