This is an article detailing the alarming rate at which the Arctic is changing. The article goes through the specific examples of Sea ice, Greenland, Wildfires and Permafrost. This is a readable article for advanced middle school and high school students, and an excellent resource for teachers.
Learning about feedback mechanisms is an important part of understanding how climate change will play out in the near and long term. Students are also exposed to the idea that scientists create simple models of complex climate systems and that feedback mechanisms play a crucial role in climate modeling.
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