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Welcome to EGU 2020!

  • EGU news
  • 4 May 2020

EGU leaders welcome participants from around the globe to Sharing Geoscience Online, the largest-ever virtual geoscience meeting.

Highlight articles

The Cryosphere

The catastrophic thermokarst lake drainage events of 2018 in northwestern Alaska: Fast-forward into the future

Northwestern Alaska has been highly affected by changing climatic patterns with new temperature and precipitation maxima over the recent years. In particular, the Baldwin and northern Seward peninsulas are characterized by an abundance of thermokarst lakes that are highly dynamic and prone to lake drainage, like many other regions at the southern margins of continuous permafrost. We used Sentinel-1 synthetic aperture radar (SAR) and Planet CubeSat optical remote sensing data to analyze recently observed widespread lake drainage.

Atmospheric Measurement Techniques

A machine-learning-based cloud detection and thermodynamic-phaseclassification algorithm using passive spectral observations

A machine-learning (ML)-based approach that can be used for cloud mask and phase detection is developed. An all-day model that uses infrared (IR) observations and a daytime model that uses shortwave and IR observations from a passive instrument are trained separately for different surface types. The training datasets are selected by using reference pixel types from collocated space lidar. The ML approach is validated carefully and the overall performance is better than traditional methods.

The Cryosphere

Quantification of seasonal and diurnal dynamics of subglacial channels using seismic observations on an Alpine glacier

Our study addresses key questions on the subglacial drainage system physics through a novel observational approach that overcomes traditional limitations. We conducted, over 2 years, measurements of the subglacial water-flow-induced seismic noise and of glacier basal sliding speeds. We then inverted for the subglacial channel’s hydraulic pressure gradient and hydraulic radius and investigated the links between the equilibrium state of subglacial channels and glacier basal sliding.


Summarizing the state of the terrestrial biosphere in few dimensions

To closely monitor the state of our planet, we require systems that can monitor
the observation of many different properties at the same time. We create
indicators that resemble the behavior of many different simultaneous
observations. We apply the method to create indicators representing the
Earth’s biosphere. The indicators show a productivity gradient and a water
gradient. The resulting indicators can detect a large number of changes and
extremes in the Earth system.

Latest posts from EGU blogs

Imaggeo on Mondays: Moonrise at Kata Tjuta

Imaggeo on Mondays: Moonrise at Kata Tjuta

This is a high-dynamic-range (HDR) photograph of moonrise over the hills of Kata Tjuta in central Australia. The HDR technique allows details to be seen in the deep shadows and well as in the brighter parts of the image. Kata Tjuta (formerly known as The Olgas) means ‘many heads’ in the Pitjantjatjara language, spoken by the local Anangu people. The location is approximately 360 km SW of the town of Alice Springs, in the Northern Territory of Australia. The climate …

#shareEGU20 afterthoughts about virtual conferencing

#shareEGU20 afterthoughts about virtual conferencing

It’s 2020 and a new coronavirus has spread all over the world-changing most if not all our habits. In a few weeks, we’ve seen adaptations to living in a world with this pandemic, from many points of view. Science reacted and adapted very quickly, sharing research and opening dialogues using online tools. Similarly, the EGU General Assembly that usually hosts every year around 15,000 people in research activities, presentations and courses, this year has been hosted online. In less than …

#shareEGU20: commenting and what happens to your displays

#shareEGU20: commenting and what happens to your displays

Now that the week of #shareEGU20 is over, you may be wondering what happens to your display materials. As the materials have been uploaded to our new digital repository, EGUsphere, they will remain available online in their current format for the foreseeable future. Remember to check the copyright selected by the author if you want to interact with any of the uploads, and feel free to contact the author to continue the conversation. But there is more! Until 31 May …