Special ‘nugget-producing’ bacteria may hold the key to more efficient processing of gold ore, mine tailings and recycled electronics, as well as aid in exploration for new deposits, University of Adelaide research has shown.
Now they have shown for the first time, just how long this biogeochemical cycle takes and they hope to make to it even faster in the future.
The role of solar variability on climate change, despite having a very long scientific tradition, is currently downplayed as a climatic factor within the most popular hypothesis for climate change.
As the root of this neglect lie two fundamental problems. Solar variability is quite small (about 0.1% of total irradiation), and there is no generally accepted mechanism by which the solar variability signal could be amplified by the climate system
The theory goes that over time CO2 increases resulting in an increase in temperature, put another way, temperature is a function of CO2, or T=f(CO2). This model, however, is deeply flawed and demonstrates a disturbing ignorance of science, modeling, and the physics behind the greenhouse gas effect.
By convention, climate is usually defined as the average of meteorological parameters over a period of 30 years. How can we use the available temperature data, intended for weather monitoring and forecasting, to characterize climate? The approach currently used is to calculate the arithmetic mean for an arbitrary base period, and subtract modern temperatures (either individual temperatures or averages) to determine what is called an anomaly. However, just what does it mean to collect all the temperature data and calculate the mean?
La géologie, une science plus que passionnante … et diverse