Looking Ahead ...In this chapter we examined what physical geography is, and how geographers study the geographic patterns found in earth systems. We have found that physical geographers are particularly well-suited for answering questions about how the future geography of planet Earth will evolve as a result of global warming and climate change. Though there are those who dispute that the current warming trends are part of a natural cycle, the vast majority of geoscientists and physical geogaphers agree that global warming is affecting the planet and it is caused linked to human activities. The evidence for global warming and its effects on physical and biological systems as shown in Figure 1.45 are mounting. Throughout the world, nearly 90%, and in most regions more, of the significant observed changes in physical and biological systems are consistent with warming. The earth system is quickly approaching a point when new geographies will appear.
Figure 1.46 Changes in Physical and Biological Systems and Surface Temperature 1970-2004 In coming chapters we'll examine the geography of earth from a variety of geoscience perspectives but particularly physical geographers. You'll explore how earth's gaseous composition is predicted to change, how and where temperature changes occur, the impact of rising oceans, and the displacement of ecosystems. We'll examine the earth's hydrological system and how climate change will affect the distribution of water across the earth. We'll learn how past changes in the position and configuration of continents changed climate and affected earth systems. Though dire conditions are predicted as a result of global warming, the challenges posed can be addressed ... and physical geographers will be at the forefront. |
