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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

Atmospheric Chemistry and Physics

Dynamic projection of anthropogenic emissions in China: methodology and 2015–2050 emission pathways under a range of socio-economic, climate policy, and pollution control scenarios

Future trends in air pollution and greenhouse gas emissions in China are of great concern to the community. Here we developed a sophisticated dynamic projection model to understand 2015–2050 emission pathways under a range of socio-economic, climate policy, and pollution control scenarios. By coupling strong low-carbon transitions and clean air policy, emissions of major air pollutants in China will be reduced by 58–87 % during 2015–2050. This work can support future co-governance policy design.

Atmospheric Measurement Techniques

Microwave and submillimeter wave scattering of oriented ice particles

Microwave dual-polarization observations consistently show that larger atmospheric ice particles tend to have a preferred orientation. We provide a publicly available database of microwave and submillimeter wave scattering properties of oriented ice particles based on discrete dipole approximation scattering calculations. Detailed radiative transfer simulations, recreating observed polarization patterns, are additionally presented in this study.

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

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.

Latest posts from EGU blogs

Analog models for teaching and more, even at home

Analog models for teaching and more, even at home

Ágnes Király is a postdoctoral research fellow at the Centre of Earth Evolution and Dynamics (CEED) at the University of Oslo, Norway. Ági has a background in geophysics, incorporating natural observations with numerical and analog models to study subduction zone processes. Ági has simulated subduction systems mostly in the Central Mediterranean. Working this spring will probably be somewhat different; no commute to work, maybe kids taking some of our attention, but no colleagues knocking on the office door, preparing and …

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 …