Detecting fossil fuel emissions patterns from subcontinental regions using North American in situ CO measurements.

Unlabelled: The ability to monitor fossil fuel carbon dioxide (FFCO) emissions from subcontinental regions using atmospheric CO observations remains an important but unrealized goal. Here we explore a necessary but not sufficient component of this goal, namely, the basic question of the detectability of FFCO emissions from subcontinental regions. Detectability is evaluated by examining the degree to which FFCO emissions patterns from specific regions are needed to explain the variability observed in high-frequency atmospheric CO observations.

Statistical modeling of global geogenic fluoride contamination in groundwaters.

The use of groundwater with high fluoride concentrations poses a health threat to millions of people around the world. This study aims at providing a global overview of potentially fluoride-rich groundwaters by modeling fluoride concentration. A large database of worldwide fluoride concentrations as well as available information on related environmental factors such as soil properties, geological settings, and climatic and topographical information on a global scale have all been used in the model.