Archive | February, 2012

Imaggeo on Mondays: Seeing double

27 Feb

Double rainbow over a Tibetan Plateau lake by Janneke IJmker, distributed by EGU under a Creative Commons licence.

Double rainbow over a Tibetan Plateau lake by Janneke IJmker, distributed by EGU under a Creative Commons licence.

On 6 September 2009, monsoon clouds had built up throughout the day over the Donggi Cona lake in central China. Janneke IJmker, now a researcher at Deltares in the Netherlands, was doing fieldwork there as part of her PhD at RWTH Aachen University in Germany. By dinner time, the sun shone on raindrops from the clouds producing a magnificent double rainbow over the lake, which IJmker captured with her camera.“The photograph was taken during a fieldwork study of Holocene climate variations in the Donggi Cona lake catchment on the north-eastern Tibetan Plateau. Monsoon clouds and intense solar radiation resulted in this double rainbow, nicely demonstrating the reversal of colours in the secondary rainbow,” IJmker noted.

Secondary rainbows are the result of a double reflection of sunlight inside the water droplets. This second reflection causes the colours of the secondary rainbow to be inverted, with blue on the outside and red on the inside, compared to the primary.

Imaggeo is the online open access geosciences image repository of the European Geosciences Union. Every geoscientist who is an amateur photographer (but also other people) can submit their images to this repository. Being open access, it can be used by scientists for their presentations or publications as well as by the press. If you submit your images to imaggeo, you retain full rights of use, since they are licenced and distributed by EGU under a Creative Commons licence.

Photo competition at the EGU 2012 General Assembly

22 Feb

If you are pre-registered for the 2012 General Assembly (Vienna, April 22-27), we invite you to submit photos to our annual photo competition. Winners receive a free registration to next year’s General Assembly!

The third edition of the EGU photo competition is now open. Until 10 March, every pre-registered participant of the General Assembly can submit up to two photos on any broad theme related to the earth, planetary, and space sciences. Short-listed photos will be exhibited at the conference, with the winner voted by General Assembly participants.

If you submit your images to the photo competition, you agree to also submit them to the EGU photo database, Imaggeo. (You will also have to register on the website so that the organisers can  appropriately process your photos.) Being open access, it can be used by scientists for their presentations or publications, as well as by the press. If you submit your images to the database, you retain full rights of use, since they are licensed and distributed by EGU under a Creative Commons license. If a short-listed entry, you also agree for the photo to be exhibited at the General Assembly.

Last year's winning photo: Geysir by James Levine, distributed by EGU under a Creative Commons licence.

Last year’s winning photo: Geysir by James Levine, distributed by EGU under a Creative Commons licence.

For more information, please check the photo competition page on Imaggeo. Previous winning photographs can be seen on the 2010 and 2011 winners’ pages.

Happy Carnival from the EGU Executive Office in Munich!

21 Feb

With everyone at the office busy with General Assembly preparations and other activities, a typical Bavarian breakfast on Carnival day is a most welcome break. Germany loves Carnival and Munich, while lagging behind Cologne, Düsseldorf, and Mainz in Fasching parties, is no exception. At the office, we decided to celebrate the date with a Weißwurst Frühstückaccompanied by… Bavarian beer, of course! Good thing we, as other German workers, have the afternoon free to watch the Carnival parades.

EGU staff ready for a Weißwurst Frühstück. From left to right: Edvard Glücksman (Science Communications Fellow), Karen Resenberger (Secretary), Philippe Courtial (Executive Secretary), Robert Barsch (Webmaster & System Admin), and Bárbara Ferreira (Media and Communications Officer).

Imaggeo on Mondays: Serene landscape, active volcano

20 Feb

Osorno Volcano — Chile by Lilli Freda, distributed by EGU under a Creative Commons licence.

Osorno Volcano — Chile by Lilli Freda, distributed by EGU under a Creative Commons licence.

This image, captured in Chile by Lilli Freda from Italy’s Istituto Nazionale di Geofisica e Vulcanologia, depicts a cloudless sky, a calm blue lake (Llanquihué), and a picture-perfect mountain with a snow-covered top. But the serenity of the landscape is only apparent: the triangular structure in the background is in fact the very active and explosive Osorno volcano.

“Osorno is a 2652-m-high stratovolcano, one of the most active volcanoes of the southern Chilean Andes. During the past 14,000 years, explosive eruptions occurred frequently and produced pyroclastic flows and surges. Recorded historical eruptions have originated from both summit and flank vents producing basaltic and andesitic lava flows that have entered both Llanquihué and Todos los Santos lakes,” Freda explained.

There are 11 historical explosions recorded for Osorno between 1575 and 1869, when the last known eruption occurred.

Freda took this photo in 2004 during a field trip that followed the General Assembly of the International Association of Volcanology and Chemistry of the Earth’s Interior, held in Pucón, Chile, that year.

Imaggeo is the online open access geosciences image repository of the European Geosciences Union. Every geoscientist who is an amateur photographer (but also other people) can submit their images to this repository. Being open access, it can be used by scientists for their presentations or publications as well as by the press. If you submit your images to imaggeo, you retain full rights of use, since they are licenced and distributed by EGU under a Creative Commons licence.

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