The oceans are a big contributor to the global carbon cycle, with phytoplankton taking up carbon through photosynthesis and incorporating it into their shells. When these organisms die their shells sink and make a calcareous contribution to seafloor sediments. Of course, with the formation of limestone, this carbon is locked out of the atmosphere for long periods of geological time. Until recently ...[Read More]
GeoCinema Online: Oceans
This week on GeoCinema Online, we’re taking a look at all things ocean, bringing what few people see straight to your desktop – or, for that matter, any other shiny viewing device you may posses! Take a dive and find out what plankton get up to in the microscopic world beyond our vision, what corals and communities lie in the cold deep and how oceanographers are working to better under ...[Read More]
GeoTalk: Simon Mudd
Today in GeoTalk, we’re talking to Simon Mudd, an exceptional and forward-thinking geomorphologist. First, could you introduce yourself and let us know a bit about what you are currently working on? I am lecturer in Landscape Dynamics at the University of Edinburgh, where I have been since 2007. Before that I was a post-doc at Vanderbilt University, in Nashville Tennessee. I received my PhD from V ...[Read More]
Geosciences Column: Larvae, Climate and Calcification
The absorption of atmospheric CO2 by the oceans results in a decline in ocean pH, hence ‘ocean acidification’, and reduces the availability of carbonate. This presents a problem to calcifying organisms (those that deposit calcium as either calcite or aragonite as hard parts) because they cannot produce their shells, valves (in the case of bivalves), or tests (in the case of diatoms) as readily. To ...[Read More]