Although very volatile, the climate system of the earth has been varying within broad but clearly defined bounds (see the chapter by Claussen in this book). It was not until the 18th century when economic activities started to change this. By today the atmospheric concentrations of greenhouse gases, and among them carbon dioxide (CO2), methane (CH4) and nitrous oxide (N20) have surpassed preindustrial levels. The CO2-concentration in the atmosphere has grown from 280 to about 360 ppbv and is approaching 400 ppbv which is far beyond the concentrations that have been observed in the last half million years. CH4 has grown from 700 to 1720 ppbv and N2O from 275 to 310 ppbv (IPCC 1995).
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Global Climate Change and Economic Analysis
- Springer Berlin Heidelberg
- Chapter 12