An article describing Kevin Anchukaitis' work at the Lamont Doherty Earth Observatory. Tree rings embody a record of climate change going back thousands of years, and they grow on every continent except Antarctica. “They let us reconstruct climate around the world, in both space and time."
Nature creates its own density column in marine systems, which is extremely important for the triggering of the spring bloom of phytoplankton. Phytoplankton are an important food source for all organisms- from microscopic zooplankton to large marine mammals such as walrus and whales. The different salinities (and therefore, different densities) of water help to stabilize the water column (by limiting