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Each month we feature specific Divisions of EGU and during the monthly GeoRoundup we will be putting the journals that publish science from those Divisions at the top of the Highlights roundup. For January, the Divisions we are featuring are: Atmospheric Sciences (CR), and Earth and Space Science Informatics (ESSI). They are served by the journals: Geoscientific Model Development (GMD), Annales Ge ...[Read More]
120 years ago in 1901, Swedish meteorologist Nils Ekholm used the term ‘greenhouse’ to describe the heating effect that a planet’s atmosphere has on the surface temperature of the planet, the first time that this now much-used and abused metaphor was published. He wrote: “The atmosphere plays a very important part of a double character as to the temperature at the earth’s surface, of which the one ...[Read More]
Many of us learned about acidity, or pH, in high school chemistry. We learned that acids like HCl could dissociate into H+ and Cl- and the activity of those H+ ions defined the acidity. In the atmosphere, the same basic definition of acidity, or pH on the molality scale, applies to aqueous phases like suspended particles and cloud droplets. Atmospheric acidity regulates what kinetic reactions are ...[Read More]
In preparation for Valentines day, Bob Myhill explores the potential for close partnership (and even love?) between the geodynamics and thermodynamics communities. Much of Earth and planetary science relies in some way on thermodynamics. This is not a surprise; the elegance1 of its premises makes thermodynamics a robust starting point for many investigations, and the number of thermodynamic applic ...[Read More]
The San Andreas Fault in California, the Alpine Fault in New Zealand, or the Main Frontal Thrust in the Himalayas are some of the most famous and largest fault zones that accommodate the relative displacement between two adjacent crustal blocks. Such faults, however, represent only the shallower expression of something much bigger: a crustal shear zone. In the first 10 kilometers or so of the crus ...[Read More]
In today’s interview, we meet Dr Fabio Corbi, a researcher at IGAG-CNR, the Institute of Environmental Geology and Geoengineering of the Italian National Research Council. Fabio has experience in analogue modelling of megathrust earthquakes and he is currently exploring the potentiality of machine learning in this research field. Hi Fabio, would you briefly tell us about you and your career? ...[Read More]
Cyclone Idai, which was labelled by the UN as possibly the worst climate calamity to ever hit the Southern Hemisphere, pounded Beira, Mozambique, in March 2019. The European Space Agency images revealed that a huge new inland ´lake´ measuring about 80 miles by 15 miles, an area the size of the European state of Luxembourg, had suddenly been created by the catastrophe. However, millions of residen ...[Read More]
The mysterious appearance and disappearance of the Weddell Polynya, a giant hole in the sea ice cover, has long puzzled scientists. Recent work reveals that the polynya is initiated and maintained by gigantic and formidable atmospheric currents: atmospheric rivers! Read on to find out more… Each year, approximately 15 million square kilometers of ice forms in the Southern Ocean around Antarctica d ...[Read More]
Congratulations Glenn! You survived your socially distanced PhD defence and after three months in your mum’s spare room you are raring to go, chomping at the bit, and approaching the start line for the next stage of your academic career. Having spent the last eight years in education, it’s time to start a new job! What should I do on my first day at work in a new place? Dear Glenn, Whe ...[Read More]
Ramsay’s 1980 important contribution is a practical and theoretical handbook about shear zones, where the reader can find a detailed classification of shear zones, their description, and mathematical explanation. A definition of the concept of shear zones opens the article, followed by the shear zones classification into three types, namely brittle (e.g., Fig. 1a), brittle-ductile (e.g., Fig ...[Read More]
