Seminar reminder and Discussion Thread.
Friday 22 August: Can we distinguish between natural and human- induced climate change?
It’s true there are lots of factors that can contribute to a warming planet, and it’s also true that the earth’s climates have been all over the map (literally!) during its 4.6 billion year existence. We hear about solar cycles, volcanoes, aerosols, even cosmic rays causing or offsetting the warming that’s been documented during the last century. But the most plausible culprit is also the one that speaks best in its own defence. That’s right. Us. Humans are amazing creatures, capable of incredible feats, one of which has been shown by scientists to be altering the climate of a planet. In this seminar, Prof Brook explains how we know this to be true.
In this second of the Climate Q&A series, Prof Brook helps us sort through what’s true and false regarding the drivers of climate change, past and present.
Some of the sceptical positions to be covered include:
- Climate’s changed before
- CO2 lags temperature
- There is a natural climate cycle
- It warmed before 1940 when CO2 was low
- It cooled mid-century
- Other planets are warming
- Natural emissions dwarf human emissions
Climate change is primarily caused by…
- the sun
- solar cycles
- cosmic rays
- the ocean
- water vapour
- volcanoes (or lack thereof)
- the ozone layer
Guest Speaker: Professor Bob Hill, Executive Dean, Faculty of Sciences, University of Adelaide.
Bob’s botanical research has made significant contributions to the areas of palaeobotany, plant systematics, plant ecophysiology and the application of research from these areas to interpreting changes that have occurred to the Australian flora through evolutionary time. He he has won many awards including the Clarke and Burbidge Medals for his research into the impact of long-term climate change on the evolution of Australian vegetation.
Time and place:
5.30 -7.00 pm, Friday 22 August 2008
Lecture Theatre 102, Napier Building, University of Adelaide (North Terrace Campus, City)
Any questions or comments, ask away!