Antonio Jordán University of Seville, Spain Description Wet forest soil surface after a rainfall simulation experiment in Los Alcornocales Natural Park, southern Spain. When pores are saturated with water, rainfall does not infiltrate, but a dense litter layer may inhibit runoff for some time. About Imaggeo Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (an ...[Read More]
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Geology for Global Development
Conference Highlights (Part 1)
Over on our Facebook page, we’ve recently been publishing a series of images showing some of the likely highlights of our annual conference next week (Friday 19th September, tickets still available). Here are the first batch… we’ll be posting more over the next week!
Soil System Sciences
Soils at Imaggeo: Soil erosion-desertfication, Iceland
Picture by Ragnar Sigurdsson / Artic Images.com. Soil banks show the former appearance of areas with dwindling vegetation and soil cover. Higher resolution images available from rth@arctic-images.com (there is a licensing fee depending on the use). Imaggeo is the online open access geosciences image repository of the European Geosciences Union.
GeoLog
Imaggeo on Mondays: Trapped air
Can you imagine walking into the depths of an icy, white, long and cavernous channel within a thick glacier? That is exactly what Kay Helfricht did in 2012 to obtain this week’s Imaggeo on Mondays photograph. Tellbreen Glacier is a small glacier (3.5Km long) in the vicinity of the Longyearbyen valley in the Svalbard region of Norway. Despite its limited size, it is an important glacier. One of the ...[Read More]
Geology for Global Development
GfGD Conference – Selected Poster Abstracts (Part 2)
An important part of our annual conference is giving students and recent graduates the opportunity to present their work – through a poster and drinks reception at the end of the day. Last year we had some fantastic posters – from both undergraduate and postgraduate students, and recent graduates. Today we continue publishing the titles and abstracts for some of the posters being displ ...[Read More]
Soil System Sciences
Monday paper: Modelling microbial exchanges between forms of soil nitrogen in contrasting ecosystems
Pansu, M., Machado, D., Bottner, P., and Sarmiento, L.: Modelling microbial exchanges between forms of soil nitrogen in contrasting ecosystems, Biogeosciences, 11, 915-927, doi:10.5194/bg-11-915-2014, 2014. The questions It is well known that N and C combine to form organic molecules due to biological processes, although they come together from different pathways. C is extracted from carbon dioxid ...[Read More]
Soil System Sciences
Lightening the clay (II)
According to the previous post, tetrahedral and octahedral sheets combine to form layers, and we can find two main types of clay structures: structure 1:1 (one tetrahedron sheet and one octahedral sheet) and 2:1 (two tetrahedral sheets and one octahedral sheet). The basic structure of clays is this: Substitutions between cations may occur in the tetrahedral and octahedral sheets, resulting ...[Read More]
Soil System Sciences
Lightening the clay (I)
“The more any indivisible exceeds, the heavier it is”. Democritus (c. 460 – c. 370 BC). What is clay? Clays are particles. Very, very small mineral particles. You cannot see them, you cannot handle them… but unity makes strength. Clays are one of the major mineral components of the soil, whose chemical and physical properties depend on them. The study of soil clay minerals allows a gen ...[Read More]
GeoLog
The known unknowns – the outstanding 49 questions in Earth sciences (Part I)
Science is about asking questions, as much as it is about finding answers. Most of the time spent by scientists doing research is used to constrain and clarify what exactly is unknown – what does not yet form part of the consensus among the scientific community. Researchers all over the globe are working tirelessly to answer the unresolved questions about the inner workings of our planet, but inev ...[Read More]
Geology for Global Development
Friday Photo (128) – Cultural Understanding Workshop (Tanzania)
Cultural Understanding Workshop (Tanzania) As part of the recent YES Network Congress in Tanzania, GfGD’s Director ran a half-day workshop on cultural understanding and its application to geoscience projects in the developing world. These images show some of the interactive activities that participants took part it. [Credit: Joel Gill, Geology for Global Development].