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Announcing the winners of the EGU Photo Contest 2017!

The selection committee received over 300 photos for this year’s EGU Photo Contest, covering fields across the geosciences. Participants at the 2017 General Assembly have been voting for their favourites throughout the week  of the conference and there are three clear winners. Congratulations to 2017’s fantastic photographers!

Penitentes in the Andes by Christoph Schmidt (distributed by imaggeo.egu.eu). This photo was taken in the Bolivian Andes at an altitude of around 4400 m. The climatic conditions favour the formation of so-called penitents, i.e. long and pointed remains of a formerly comprehensive snow field.

Symbiosis of fire, ice and water by Michael Grund (distributed by imaggeo.egu.eu). This picture was taken at Storforsen, an impressive rapid in the Pite River in northern Sweden.

Movement of the ancient sand by Elizaveta Kovaleva (distributed by imaggeo.egu.eu). In the Zion National Park you can literally touch and see the dynamic of the ancient sand dunes.

Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, these images can be used for free by scientists for their presentations or publications, by educators and the general public, and some images can even be used freely for commercial purposes. Photographers also retain full rights of use, as Imaggeo images are licensed and distributed by the EGU under a Creative Commons licence. Submit your photos at http://imaggeo.egu.eu/upload/.

Extraordinary iridescent clouds inspire Munch’s ‘The Scream’

Screaming clouds

Edvard Munch’s series of paintings and sketches ‘The Scream’ are some of the most famous works by a Norwegian artist, instantly recognisable and reproduced the world over. But what was the inspiration behind this striking piece of art?

The lurid colours and tremulous lines have long been thought to represent Munch’s unstable state of mind; a moment of terror caught in shocking technicolour. At the same time, scientists have recently identified the connection between the great works of artists such as William Turner and the red and orange sunsets which can be a result of the global impact of volcanic aerosols. However, research presented this week at the European Geosciences Union General Assembly in Vienna by atmospheric scientists in Oslo Norway, suggests that the painting might show us evidence of something much stranger, and rarer – nacreous clouds.

Nacreous or mother-of-pearl clouds, are an extremely rare form of cloud created 20-30km above sea level – in the polar stratosphere when the air is extremely cold (between -80 and -85 degrees centigrade) and exceptionally humid,. So far observed mostly in the Scandinavian countries, these clouds are formed of microscopic and uniform particles of ice, orientated into thin clouds. When the sun is below the horizon (before sunrise or after sunset), these clouds are illuminated in a surprisingly vibrant way blazing across the sky in swathes of red, green, blue and silver. They have a distinctive wavy structure as the clouds are formed in the lee-waves behind mountains.

In 2014, these clouds were seen again over the skies of Oslo and given their extreme colouration and unexpected appearance, a photographer, Svein Fikke, immediately thought of Munch’s work. This perceived similarity between the mother of pearl clouds and the striking clouds and sense of tension in the painting is only reinforced when reading Munch’s writings about his experiences on the day that inspired the painting.

“I went along the road with two friends – the sun set

I felt like a breath of sadness –

– The sky suddenly became bloodish red

I stopped, leant against the fence, tired to death – watched over the

Flaming clouds as blood and sword

The city – the blue-black fjord and the city

– My friends went away – I stood there shivering from dread – and

I felt this big, infinite scream through nature”

                            Edvard Munch’s Diary Notes 1890-1892 (Tøjner and Gundersen, 2013)

Scientists have, in the past, used artworks to infer environmental conditions; from paintings of the ‘frost fairs’ held on the River Thames that show the gradual environmental change in Europe, to the discovery that several artists depict the influence of volcanic aerosols on global atmosphere in their paintings.

In a study conducted in 2007 (and 2014), scientists found that the visible impact that volcanic aerosols have on the atmosphere has in fact been recorded in the works of many of the great masters – particularly William Turner (Zerefos et al, 2007)). Several of Turner’s paintings depict sunsets with a distinct red/orange hue, distinct from his usual work of other years. This was correlated with significant volcanic eruptions in the same time period and the researchers found that these reddish paintings were all created in the years of, or immediately following, a major eruption (shown in the graph below).

Graph to show the relationship between colour and volcanic aerosols (a)The mean annual value of R/G measured on 327 paintings. (b)The percentage increase from minimum R/G value shown in (a). (c)The corresponding Dust Veil Index (DVI). The numbered picks correspond to different eruptions as follows: 1. 1642 (Awu, Indonesia-1641), 2. 1661 (Katla, Iceland-1660), 3. 1680 (Tongkoko and Krakatau, Indonesia-1680), 4. 1784 (Laki, Iceland-1783), 5. 1816 (Tambora, Indonesia-1815), 6. 1831 (Babuyan, Philippines-1831), 7. 1835 (Coseguina, Nicaragua-1835). 8. 1883 (Krakatau, Indonesia-1883). From Zerefos et al (2007).

For many years ‘The Scream’ was thought to also show the influence of a volcanic eruption, most likely the catastrophic eruption of Krakatoa in 1883 (described here by Volcanologist David Pyle), but whereas volcanic skies tend to tint the whole sky a red/orange, the skies in the scream have a distinct pattern, only seen in these extremely rare nacreous clouds.

How rare are they? Well, researcher Dr Helene Muri, a researcher based at the University of Oslo, who presented the research at the press conference, said that in her lifetime living mostly in Norway as an atmospheric researcher she has only seen them once. And what about Munch’s feeling of dread and ‘breath of sadness’?

Well, having a glowing swathe of iridescent petrol coloured clouds flare into bright relief after sunset, only for them to disappear 30 minutes later would be pretty shocking for any of us, even in our modern days of fluorescent streetlamps and light polluted skies.

By Hazel Gibson, EGU Press Assistant at the EGU 2017 General Assembly

EGU 2017: Follow the conference action live!

EGU 2017: Follow the conference action live!

Earlier this month we shared a post on how you can keep up to date with all the science being presented at the General Assembly via our social media channels. This week we share with you how you can tune into the conference action, live!

Many of the EGU General Assembly highlights will be streamed live, so if you can’t make it to Vienna this year, you can still watch the Union Symposia on Making Facts Great Again: how can scientists stand up for science? (US3), the Great Debate on the great extinctions (GDB5) and several of the medal lectures live on the conference website.

To watch a session, simply click on the link that appears next to its entry on the full webstreaming schedule (available here). Videos will also be available on demand after the Assembly, and if you’d like to watch past year’s sessions, you can do so on EGU TV or the Union’s YouTube channel.

In addition, you’ll be able to stream all the press conferences at the 2017 General Assembly live too. Press conferences are special sessions organised for the press and media participants at the EGU 2017 General Assembly. Limited spots are available upon request for scientists who are bloggers or science writers who may wish to attend press conferences.

Journalists, science writers and bloggers who wish to ask questions remotely during press conferences, can do so using the chat window you’ll find below the web stream for each press conference. During each press conference, a member of the EGU press team will monitor the chat and read your questions out loud. For more information, check the press conferences page on the EGU media website.

The EGU General Assembly is taking place in Vienna, Austria from 23 to 82 April. Check out the full session programme on the General Assembly website.

Marching for Science in Vienna

On 22 April, Earth Day and the day before the start of the EGU General Assembly, scientists and science enthusiasts across the globe will be marching to celebrate science and to call for the safeguarding of its future. While the main march is taking place in Washington D.C. in the US, there are hundreds of satellite marches happening around the world, including in Vienna.

Representatives of both the EGU and the AGU, including the EGU President Hans Thybo and the AGU Executive Director Christine McEntee, will be marching together in Vienna in a united display of support for open, responsible research and for a safe future for the geosciences.

EGU-AGU Meeting point for Vienna March for Science (click to enlarge).

We would like to invite you to march with us in Vienna. Please meet us on Saturday, April 22 at 12:45 at the Sigmund-Freud-Park: see the meeting point marked in the image. You can find more details about the route and the march on the March for Science Vienna website.

Why are you marching for science?

You can download this EGU sign to bring to the March to show why you are standing up for science (the AGU’s instagram is a great source of inspiration). You can also join in with our campaign on social media by posting photos of yourself with the sign and tagging them with the hashtags #ScienceMarch, #ScienceServes and #EGU17.

AGU have posters, and other resources, to download from their March for Science page, as well as tips on how to get ready for the march.

Also, if you plan to march in Vienna, Washington DC, or any of the other satellite marches taking place in cities across the world, don’t forget to let Nature and AGU know why you are supporting the march by taking their surveys.

We look forward to seeing you in Vienna and to championing science together.

Some of the EGU’s Executive Office on why they stand up for science (from L to R: Laura (Communications Officer), Bárbara (Media & Communications Manager) and Philippe (Executive Secretary). Click to enlarge.

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