Global Climate Change In Context (GEOG90026)

This subject examines the nature and causes of past changes in Earth’s climate during the Quaternary Period (the last 2.7 million years), with a particular emphasis on the last glacial-interglacial cycle. It aims to place modern climate and the projections of future global warming into a longer-term perspective, and will allow students to understand why human interference in the climate system may be a legitimate cause for concern. Emphasis is placed on how Earth materials (ice, rocks, sediments, biological materials) record past climate changes, the techniques used to extract this ‘palaeoenvironmental information’, and the principles that govern how this information is interpreted.

A series of lectures covering the theoretical elements of the subject will immediately precede 10 days of field study (in either Tasmania, mainland SE Australia or New Zealand). The field component focuses on how particular environments (e.g. coastal, lake, fluvial, cave, and glacial) preserve evidence of past climate change. Additional lectures and practicals following completion of the field work will focus on the types of analytical methods employed in this field, the nature of the data that are produced and how these are processed and interpreted. By the end of the subject, students will not only appreciate the dynamics of Earth’s past climate and the mechanisms that have forced it, but also the way in which we practice this important and growing field of study.