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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.


Biogeosciences

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

#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 …


Did you know… tropical cyclones cause large snowfall on Kilimanjaro’s glaciers?

Did you know… tropical cyclones cause large snowfall on Kilimanjaro’s glaciers?

Tropical cyclones are an important part of the weather in the southwest Indian Ocean each year, from November through April. These storms can cause massive destruction and loss of life when they make landfall, which happens most often on the islands of Mauritius and Madagascar and the coastal region of Mozambique. However, until recently, relatively little was known about their impacts on the high-mountain areas of East Africa and the small glaciers in those regions. When you think of glaciers, …


The Sassy Scientist – Stranded, Not Forgotten

The Sassy Scientist – Stranded, Not Forgotten

Blanka was scouring the field for evidence, collecting samples and making do with the supplies for a short field trip expeditiously. And then she couldn’t travel back home anymore: I am stuck at my fieldwork location due to closed borders and social distancing. What to do? Dear Blanka, That must be very inconvenient. I do hope that you can manage with the restrictions placed upon your movements in your fieldwork area. I would seek one major benefit of being stuck …