EGU Blogs

Highlights

GeoLog

Imaggeo on Mondays: The polje between sky and Earth

Imaggeo on Mondays: The polje between sky and Earth

Poljes are one of the most impressive features existing in karst landscapes. These large flat closed depressions are prone to regular flooding that can form temporary lakes on their surface. Planinsko Polje [in Slovenia] is surely the most famous example of polje existing. The highest floods can reach up to 8 metres above the gauging station and last for more than two months. The lake is then more ...[Read More]

CR
Cryospheric Sciences

Climate Change & Cryosphere – Summer 2019: The year that the Arctic was sunburned

Climate Change & Cryosphere – Summer 2019: The year that the Arctic was sunburned

June, July and August 2019 saw extensive heat waves across Europe, with air temperatures reaching above 40°C in many countries. In response, record breaking ice melt was observed in Greenland and wildfires in Siberia, Alaska, Arctic Canada and Greenland occurred. A particularly dry and warm summer was responsible for hemisphere-wide changes to the cryosphere. In this week’s post, we will review so ...[Read More]

AS
Atmospheric Sciences

A simple model of convection to study the atmospheric surface layer

A simple model of convection to study the atmospheric surface layer

Since being immortalised in Hollywood film, “the butterfly effect” has become a commonplace concept, despite its obscure origins. Its name derives from an object known as the Lorenz attractor, which has the form of a pair of butterfly wings (Fig. 1). It is a portrait of chaos, the underlying principle hindering long-term weather prediction: just a small change in initial conditions leads to vastly ...[Read More]

GD
Geodynamics

The Sassy Scientist – Earthquake Exoteries Nr. I

The Sassy Scientist – Earthquake Exoteries Nr. I

Every week, The Sassy Scientist answers a question on geodynamics, related topics, academic life, the universe or anything in between with a healthy dose of sarcasm. Do you have a question for The Sassy Scientist? Submit your question here or leave a comment below. In a comment on a post about the key papers in geodynamics, the Curmudgeonly Commenter asked: Could you please point out some exceptio ...[Read More]

NP
Nonlinear Processes in Geosciences

NPG Paper of the Month: “Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach”

Schematic map of spatial diversity of Indian precipitation teleconnections at different time scales. (a) ENSO, (b) IOD, (c) NAO, (d PDO, and (e) AMO. Colors are consistent with the Indian community shown in the right figure. Presence of color in community segment indicates significant synchronization between teleconnection and Indian precipitation. Every single segment of circle shows the temporal scale. Cardinal direction has been projected in the background of each circle.

Today’s we launch one of our promised activities: the NPG Paper of the Month. This month the award is achieved by Jürgen Kurths and co-authors for their paper “Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach” (https://www.nonlin-processes-geophys.net/26/251/2019/). Ankit Agarwal, one of the authors of the manuscript, tells ...[Read More]

GeoLog

Gender equality and equal opportunities – keep the discussion going!

Gender equality and equal opportunities – keep the discussion going!

Why do I feel uncomfortable as the only woman in a meeting? Why do they gossip about the male postdoc who is supervising three female MSc students? Have I really been asked to give this presentation just because I am a woman? It was thanks to all the work and reading I was doing for our study about gender inequality in the geosciences that I realised it is not ok I have to ask myself these questio ...[Read More]

NH
Natural Hazards

Stromboli: The Lighthouse of the Mediterranean

Stromboli: The Lighthouse of the Mediterranean

In the last months two paroxysmal explosive eruptions took place at Stromboli volcano: the first one, totally unexpected, on 3rd July (Video 1) that sadly cost the life of a person and the second and, currently, last one about three weeks ago, on the 28th August (Video 2). Today we try to answer a couple of questions about Stromboli and its eruptions. Are these paroxysmal eruptions common or rare ...[Read More]

Geochemistry, Mineralogy, Petrology & Volcanology

#mineralmonday: tiptopite

#mineralmonday: tiptopite

#mineralmonday: your weekly* dose of obscure mineralogy, every Monday** [*not guaranteed; **or possibly Tuesday-Sunday] What is it? Tiptopite: K2Na1.5Ca0.5Li3Be6(PO4)6(OH)2•(H2O) What’s it made of?  Take a deep breath and recite after me: potassium, sodium, calcium, lithium, beryllium, phosphorus, oxygen and water (H2O). Is it pretty? Yes, it’s a beautiful fibrous mineral. You wouldn&# ...[Read More]

GeoLog

Imaggeo on Mondays: How do Earth’s Northern Lights form?

Imaggeo on Mondays: How do Earth’s Northern Lights form?

Aurora Borealis, which means Northern Lights are caused by electrically charged particles from the sun, which enter the Earth’s atmosphere and collide with gases such as oxygen and nitrogen. When the charged particles are blown towards the Earth by the solar wind, they are largely deflected by the Earth’s magnetic field. However, the Earth’s magnetic field is weaker at the poles and therefore some ...[Read More]

CR
Cryospheric Sciences

Climate Change & Cryosphere – Why is the Arctic sea-ice cover retreating?

Climate Change & Cryosphere – Why is the Arctic sea-ice cover retreating?

The Arctic Ocean surface is darkening as its sea-ice cover is shrinking. The exact processes driving the ongoing sea-ice loss are far from being totally understood. In this post, we will investigate the different causes of the recent retreat of the Arctic sea-ice cover, using the most updated literature… Arctic sea ice is disappearing Due to its geographical position centered around the Nort ...[Read More]