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Environmental chemistry
At the end of the last ice age, changes in ocean circulation patterns led to increased atmospheric CO2 levels. In this article, analysis of opal deposition supports the hypothesis that the release of CO2 was a result of the reduction of the glacial north atlantic intermediate water causing antarctic overturning, rather than the alternative hypothesis that westerly wind-induced effects were the driver of CO2 release.
Roots aren't just for absorbing water. This paper shows that roots and associated fungi in subarctic forests act as carbon sinks.
Nitrogen pollution from emissions and agricultural use in China are rivaling the levels seen in Europe in the 1980s.
Nutrient enrichment is shown to be a driver for salt marsh loss by decreasing below-ground plant mass and increasing rates of microbial decomposition.
Models show that plankton diversity and ocean circulation are important to the balance of nitrogen in the ocean.
