The 140th RIHN seminar

Date: February 21th, 2017 (Tuesday) 13:30 - 15:30
Place: Seminar Rooms 1 & 2, RIHN( → Access)
Lecturer: Prof. Isaac Rodrigues dos Santos(RIHN Visiting Research Fellow)
Prof. Isaac Santos is a coastal oceanographer specializing in the use of natural radioactive and stable isotope tracers to investigate groundwater processes and carbon cycling in aquatic systems. He is currently a visiting research fellow at RIHN. Much of his work focuses on developing approaches to obtain automated, high resolution observations. His research relies on active international collaboration with interdisciplinary projects completed in Antarctica, Germany, Brazil, Mexico, New Zealand, Cook Islands, Indonesia, China and USA. In 2011, Santos was given the Cronin Award from the Coastal and Estuarine Research Foundation for his research linking carbon cycling to hydrology.
Title: The water-climate nexus
Contact: IWAI Kaori E-mail


Rivers estuaries, and groundwaters hold high loads of greenhouse gases that eventually scape to the atmosphere. Globally, this process is thought to be significant and partially offset the terrestrial carbon sink in global forests. The release of greenhouse gases from waterways to the atmosphere is often accelerated by changes in hydrology such as drainage of wetlands and the construction of residential canal estate. My group has now investigated the water-climate nexus in several aquatic systems, including unconventional gas fields, coastal wetlands, mangroves, coral reefs, estuaries, and rivers. Groundwater and porewater were major drivers of carbon cycling in most of the systems investigated. As part of my research at RIHN, we are investigating how groundwater contributes to carbon cycling in Obama Bay. I will contrast my findings across a wide range of environments and discuss how aquatic ecosystems may provide feedbacks to the climate system.