New Publication: Highly Oxygenated Molecules in the Amazon, Beijing and elsewhere

Air pollution is created by enhanced concentrations of particles in the air. Some of these particles are so large that you can easily see them, such as dust or sand. However many are much smaller so that they can’t be seen with the naked eye. This fine particulate matter (PM2.5) is often more dangerous because smaller particles can penetrate deeper into the lung. In addition, these particles play an important role in our climate system. In the atmosphere, for example, they absorb and reflect light, and act as condensation nuclei for clouds. Thus PM2.5 plays a key role for public health and for climate change.

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New Publication: Human influence on particulate matter in the Amazon

We hear a lot about particulate matter these days, mostly in the context of air pollution in inner cities. But what about particulate matter in the Amazon rainforest? Well, the short answer is that particulate matter is present in the air above the Amazon, too. And although its concentrations are lower than those in large cities, urbanization and deforestation fires have a significant impact. To find out what that impact exactly is, was the aim of a new study by Suzane de Sá and co-authors.

They analyzed the concentration, composition and properties of particulate matter in the central Amazon. As part of the GoAmazon campaign, they collected data during the dry season, when burning events are most frequent.… Continue reading

New Publication: Comparing air pollution in Manaus and at ATTO by identifying aerosols

You have probably heard a lot about air pollution recently, comparing air pollution in Manaus and in the Amazon rainforest by analyzing what aerosols are present. Edited after Wu et al. (2018)be it because of the massive wildfires in California, smog in India or the diesel emission scandal in Germany. So let’s look into air pollution in the Amazon. Most air pollutants are actually aerosols. Identifying these aerosols and their chemical composition can help us understand where they come from and to what extent certain regions are affected by air pollutions. That is exactly what Li Wu and co-authors did in their new study in the Amazon rainforest.

They collected and analyzed aerosols in two locations: the city of Manaus, a large urban area in Brazil, and the ATTO site in the heart of the forest.Continue reading