Biogeosciences

Volcanic darkness marked the dawn of the Dark Ages

Laura Roberts-Artal June 15, 2016

Volcanic ash can spread far and wide. Credit: Taro Taylor via Flickr.

The dawn of the Dark Ages coincided with a volcanic double event – two large eruptions in quick succession. Combined, they had a stronger impact on the Earth’s climate than any other volcanic event – or sequence of events – in the last 1200 years. Historical reports reveal that a mysterious dust cloud dimmed the sun’s rays between in 536 and 537 CE, a time followed by global societal decline. Now, ...[Read More]

Testing triggers of catastrophic climate change

Sara Mynott June 3, 2016

The research presented during the EGU’s 2016 General Assembly have wide-reaching implications for how we understand planet Earth. In today’s post, Sara Mynott, an EGU press assistant during the conference, writes about findings presented at the meeting which highlight the importance of the biosphere when it comes to understanding the threat posed to our planet by environmental challenges. With the ...[Read More]

Imaggeo on Mondays: Storm on the Rock

Laura Roberts-Artal May 30, 2016

Storm on the rock. Credit: John Clemens (distributed via imaggeo.egu.eu)

This is a photograph of Uluru, in the Northern Territory of Australia, on a hot and humid summer afternoon. As lightning flashed about, torrential rains swept across the landscape and silver rivulets of water began to rush down the sides of the mountain. Uluru is made of red-coloured Proterozoic arkosic sandstones, a coarse grained lithology rich in quartz and feldspars. However, on rare days such ...[Read More]

Imaggeo on Mondays: Moving images – Photo Contest 2016

Laura Roberts-Artal May 23, 2016

Since 2010, the European Geosciences Union (EGU) has been holding an annual photo competition and exhibit in association with its General Assembly and with Imaggeo – the EGU’s open access image repository. In addition to the still photographs, imaggeo also accepts moving images – short videos – which are also a part of the annual photo contest. However, 20 or more images have to be submitted ...[Read More]