This is Damavand Volcano, Iran. Its history is one of short bursts of eruptive activity followed by long periods of quiescence and while there are active fumaroles near Damavand’s summit, the volcano has been dormant for the past 1000 years. The cloud that encircles its peak is known as a cap cloud, so-called because these peculiar clouds form around high peaks, adding a flat white cap to mountain ...[Read More]
Geosciences Column: How curbing HFC emissions could reduce warming
Carbon dioxide is without a doubt the most famous of warming culprits. But would reducing emissions of this greenhouse gas be enough to mitigate climate change within this century? A recent paper published in Atmospheric Chemistry and Physics focuses on a less known substance that, if phased out, could avoid as much as 0.5 °C of warming by 2100. Hydroflurocarbons (HFCs) have an interesting history ...[Read More]
Dust in the desert: The Kuiseb and Tschaub Rivers – part 2 of 3
The dust in the desert series continues this week as James King shares his experience of fieldwork in Nambia… Our base of operations is located in Swakopmund, a sea-side town of German heritage. This has two benefits: pastries and unrivalled hardware stores. The amount of supplies (hardware, not cake) that this sleepy Namibian town has puts most major UK cities to shame; proving to be an essential ...[Read More]
Dust in the desert: Measuring it is only half the battle – Part 1 of 3
Fieldwork is vital to understanding all sorts of Earth processes, but that doesn’t make it easy! James King, a researcher from the University of Oxford, describes what it takes to set off on a scientific expedition… Although the classic text on sediment transport by wind by Sir Ralph Bagnold was written way back in 1941, the mechanics of dust storms and their effects on the climate are still ...[Read More]