A recent study of ice cores from Antarctica provides a climate record for the past 800,000 years. The analysis reveals that atmospheric carbon dioxide was strongly correlated with Antarctic temperature throughout eight glacial cycles.
Based on the latest results from WHO air pollution is now the world’s largest single environmental health risk, linked to 12% of all global deaths. Citizen scientists can contribute to measuring air pollution using a low cost sensor measuring atmospheric particulate matter and share the measurements via open source geospatial web mapping software.
The source of the accelerating rise in atmospheric methane concentration since 2007 remains an open question. A recent study using satellite imagery suggests that the increase may be ascribed to increased fossil fuels and livestock sources in roughly equal measure.
A new analysis of Antarctic ice cores shows that at the beginning of the last deglaciation, the start of rising CO2 lagged rising temperature by about 800 years which is consistent with the Southern Hemisphere playing a dominant role in the rise in atmospheric CO2. The concomitant rise in methane appears to be governed by Northern Hemisphere processes.