EGU logo

European Geosciences Union



Landscape version (with claim) of the new EGU logo.

EGU Outreach Committee seeking new members

  • EGU news
  • 30 January 2020

The EGU Outreach Committee promotes the Earth, planetary and space sciences and the activities of the EGU among scientists, the public, policymakers and all other interested individuals and organisations. The Committee seeks 3–4 new members to help further its programme.

Boreal forest fire in Canada

Air pollution in New York City linked to wildfires hundreds of miles away

  • Press release
  • 21 January 2020

A new study published in the European Geosciences Union (EGU) journal Atmospheric Chemistry and Physics shows that air pollutants from the smoke of fires from as far as Canada and the southeastern U.S. traveled hundreds of miles and several days to reach Connecticut and New York City, where it caused significant increases in pollution concentrations.

Highlight articles

Hydrology and Earth System Sciences

Surface water as a cause of land degradation from dryland salinity

Secondary dryland salinity is a global land degradation issue. Our understanding of causal processes is adapted from wet and hydrologically connected landscapes and concludes that low end-of-catchment runoff indicates land clearing alters water balance in favour of increased infiltration and rising groundwater that bring salts to the surface causing salinity. This study shows surface flows play an important role in causing valley floor recharge and dryland salinity in low-gradient landscapes.

The Cryosphere

Cryoconite: an efficient accumulator of radioactive fallout in glacialenvironments

Cryoconite is the sediment found on the surface of glaciers. The paper presents cryoconite as an environmental matrix able to accumulate natural and artificial radioactivity with unprecedented efficiency. Only samples from sites where nuclear accidents and explosions occurred present a stronger radioactive contamination. The peculiarities of glacial environments are responsible for this extreme feature, making cryoconite a useful tool tool for the monitoring of environmental radioactivity.

Atmospheric Measurement Techniques

Quantifying hail size distributions from the sky – application of drone aerial photogrammetry

Collecting measurements of hail size and shape is difficult due to the infrequent and dangerous nature of hailstorms. To improve upon this, a new technique called HailPixel is introduced for measuring hail using aerial imagery collected by a drone. A combination of machine learning and computer vision methods is used to extract the shape of thousands of hailstones from the aerial imagery. The improved statistics from the much larger HailPixel dataset show significant benefits.

Earth System Dynamics

A multi-model analysis of teleconnected crop yield variability in a range of cropping systems

In this study, we analyse the impacts of three major climate oscillations on global crop production. Our results show that maize, rice, soybean, and wheat yields are influenced by climate oscillations to a wide extent and in several important crop-producing regions. We observe larger impacts if crops are rainfed or fully fertilized, while irrigation tends to mitigate the impacts. These results can potentially help to increase the resilience of the global food system to climate-related shocks.

Latest posts from EGU blogs

Introducing Our New Authors – Hannah Ritchie

Introducing Our New Authors – Hannah Ritchie

Over the next few weeks, we’d like to introduce you to some new faces on the GfGD blog, bringing fresh ideas and perspectives on topics relating to geoscience and sustainable development. We’re delighted to have their input and look forward to their posts. Today we interview Hannah Ritchie – a PhD student doing research in WASH (WAter, Sanitation & Hygiene). Tell us a bit about yourself Hi, I’m Hannah Ritchie, a PhD student at Cranfield University. I’m very excited to …

Satellite soil moisture improves rainfall just where needed

Satellite soil moisture improves rainfall just where needed

Soil moisture and rainfall are the two fundamental variables in the water and energy cycle and their knowledge in many applications is crucial. For instance, for predicting the occurrence and the magnitude of flood and landslide events the knowledge of the initial soil moisture condition and of rainfall amount is mandatory. In the last decade, some authors have proposed a completely new approach, i.e., the use of satellite soil moisture for estimating and improving rainfall, doing hydrology backwards. In 2014, …

Imaggeo on Mondays: The Tempest

Imaggeo on Mondays: The Tempest

Measuring the aurora. This picture was taken while doing an optical/radar coordinated campaign in Svalbard, Norway, near the settlement of Longyearbyen. In this campaign, we were measuring for the first time the polarisation of the auroral ‘red line’ of atomic oxygen with a photopolarimeter and were running the radars in order to have a better understanding of the state of the ionosphere. The air was crisp and cold (-20 degrees Centigrade), the sky was clear but there was a lot …