Chapter 19, Problem 5CR

To determine

The key concept of Section 19.3. The reason that makes the current atmospheric warming an urgent problem. The definition of the climate change tipping point with three examples. The possible effects of a warmer atmosphere on arctic sea ice and land-based ice. The ways in which permafrost and tropical wetlands change and affect climate. The reason behind the changing sea levels and six harmful effects of the sea level rise. The definition of ocean acidification and its occurrence. The relation between atmospheric warming, global drought, extreme weather, and an intensified water cycle. The reason behind Alaska being the bellwether of climate change. The possible effects of climate change on biodiversity, food production, human health, and economies, and national security. Pick three of these effects to explain the way in which each can become part of a positive feedback loop leading to increased climate change.