Dr. Glenn Carter Associate Professor Department of Oceanography University of Hawai‘i at Mānoa Location Information: **this seminar will be held both in person (Holmes Hall 247) and over Zoom** Meeting ID: 960 4654 5799 Passcode: OREseminar https://hawaii.zoom.us/j/96046545799 The deep ocean trenches, or hadal zone, are amongst the most poorly studied regions on the planet. This is particularly true of the hadal water column, as most of the hadal research to date focused on the geology, biology, and ecology of the seafloor. Existing observations suggest that rather than being quiescent and isolated from the ocean above, the hadal zone is ventilated