Atmospheric Sciences

Geosciences Column: How erupting African volcanoes impact the Amazon’s atmosphere

Olivia Trani July 12, 2019

An aerial view of the towering volcanic peak of Mt. Nyiragongo. Research suggests that its emissions can reach as far as South America, impacting the atmosphere of the Amazon Basin. (Credit: MONUSCO/Neil Wetmore via Wikimedia Commons)

When volcanoes erupt, they can release into the atmosphere a number of different gases initially stored in their magma, such as carbon dioxide, hydrogen sulfide, and sulfur dioxide. These kinds of gases can have a big influence on Earth’s atmosphere, even at distances hundreds to thousands of kilometres away. A team of researchers have found evidence that sulfur emissions from volcanic eruptions i ...[Read More]

Imaggeo on Mondays: Our QUEST for innovative tools to understand changing environments and climates

Sebastian Breitenbach and Adam Hartland June 10, 2019

A multi-year cave monitoring programme in New Zealand's Waipuna Cave focusses on developing novel quantitative proxies for palaeoclimatology. We measure drip rate, temperature, electrical conductivity and many other parameters, analyse the isotopic and elemental composition of the water, and compare our results with the length and origin of recorded rainfall. With our data, we hope to better understand the interplay of the El Nino-Southern Oscillation and the Southern Westerlies and the local response to changes in their dynamics. This monitoring is part of the EU Marie Curie RISE Project "QUantitative palaeoEnvironments from SpeleoThems – QUEST". Credit: Sebastian Breitenbach (distributed via imaggeo.egu.eu)

The photo shown here shows typical sampling work underground. You can see Ola Kwiecien and Cinthya Nava Fernandez, researchers at Ruhr University Bochum in Germany, collecting dripwater in New Zealand’s Waipuna Cave as part of a four-year EU-funded monitoring programme. Our research aims at developing innovative geochemical indicators that we can use to quantify changes in the hydrological system ...[Read More]

Imaggeo on Mondays: A painted forest fire

Olivia Trani May 27, 2019

The art of Fire in soil system. Credit: Victoria Arcenegui (distributed via imaggeo.egu.eu)

This week’s featured image may appear to be a painted landscape, but the picture is in fact a photo, taken ten years ago by Victoria Arcenegui, an associate professor at Miguel Hernández University in Spain, during a controlled forest fire in northern Portugal. The blaze is actually hot enough to distort the image, making some of the flames appear as brush strokes, beautifully blurring together th ...[Read More]

Imaggeo on Mondays: Dust devil sighting in the Atacama Desert

Rita Nogherotto May 20, 2019

Dust devil in Atacama desert. Credit: Rita Nogherotto (distributed via imaggeo.egu.eu)

Dust devils are like miniature tornadoes, they form when a pocket of hot air near the surface moves fast upward and meets cooler air above it. As the air rapidly rises, the column of hot air is stretched vertically, thereby moving mass closer to the axis of rotation, which causes intensification of the spinning effect by conservation of angular momentum. In the Atacama Desert [in Chile] they are r ...[Read More]