Dynamics of the atmospheric circulation in past, present and future climates
The large-scale atmospheric circulation strongly influences Earth’s climate, both locally and globally, via its transport of energy, moisture, and momentum. While our ability to simulate the global circulation is improving, large model biases and uncertainties in climate change projections persist. Advancing our knowledge of the underlying dynamics is therefore crucial for reliable climate projections and for correctly interpreting palaeoclimate records.
The objective of this session is to advance our mechanistic understanding of atmospheric circulation changes and to analyse their impacts at global and regional scales, specifically on precipitation in past, present, and future climates. Topics will include theoretical, observational and modelling of tropical (ITCZ, monsoons, Hadley & Walker circulations, MJO) and extratropical circulations (jet streams, storm tracks, blocking).
CL4.19: 14:15–17:00
‘Picture A Scientist’ screening extended!
Due to popular request, and as a thank you to all vEGU21 participants for their patience earlier this week, EGU has arranged for a second screening window of ‘Picture A Scientist’! EGU President Helen Glaves, EGU Programme Committee Chair Peter van der Beek, and Claudia Jesus-Rydin, chair of EGU’s Equality, Diversity, and Inclusion Working Group, are pleased to pair the additional screening with the release of the recording of Monday’s Great Debate, Challenging discrimination in the geosciences: amplifying unheard voices, which vEGU21 meeting attendees can now view when logged in to the meeting platform. The new screening window will begin at 9:00 CEST on Thursday, 29 April and extend until 9:00 CEST on Sunday, 2 May.
NET0: 9:00 CEST Thurs. 29 Apr – 9:00 CEST Sun. 2 May
Geodesy for Climate Research
This session intends to showcase climate-related studies that have made use of geodetic observations, techniques, and data, including altimetry, gravimetry (CHAMP, GRACE, GOCE and GRACE-FO), navigation satellite systems (GNSS and DORIS) or remote sensing techniques that are based on both passive (e.g., optical and multi/hyperspectral) and active (i.e., SAR) instruments. The session adheres to the ideas of the recently established Inter-Commission Committee on “Geodesy for Climate Research” (ICCC) of the International Association of Geodesy (IAG), which aims to encourage collaborations between the climate and geodetic communities.
G3.1: 9:00–10:30
Tides in the past, present, and future
Tides impact many Earth system processes such as ocean mixing, global ocean circulation, ice sheet dynamics, and biogeochemical processes. This session will focus on all aspects of tides in the ocean, atmosphere, and solid Earth. Topics include progress in numerical modelling of surface and internal tides and assessments of their accuracy, observations of long-term changes in tides and tidal processes on global to regional scales, insights on tidal variability from global geodetic observing techniques, and research into how tides shape Earth’s evolutionary processes. We will also discuss tidal dynamics in estuaries, rivers, and lakes.
OS4.1: 11:45–15:00
Late-Breaking Session: The December 2020 earthquake sequence in Petrinja, Croatia, and its seismotectonic and geodynamic environments
This late-breaking session will discuss seismological, geodetical, or geological observations related to the 29 December 2020 (Mw 6.4) Petrinja, Croatia, earthquake sequence; its surface effects on human and natural environment in terms of shaking and faulting; the ongoing seismic sequence; and insights on the regional faults, their historical seismicity, or recent geological activity. The shock was the strongest event in continental Europe since the Norcia sequence (Italy) in 2016 and was caused by the rupture of a NW-SE dextral strike-slip fault at the boundary between the Dinarides and the Pannonian basin.
TS4.0: 15:30–17:00
Advances in Solar Irradiance and Earth Radiation Budget Measurements
Solar irradiance is the key energy input to Earth. Both the Total Solar Irradiance (TSI) and the Top of the Atmosphere (ToA) Outgoing Radiation (TOR) need to be measured with unprecedented accuracy and precision to determine the Earth Energy Imbalance (EEI), which affects global warming. The measurements needed to determine EEI have not been sufficiently accurate. This calls for improved instrument technologies and a traceable calibration chain of the space instrumentation. This session will discuss both the measurement of solar irradiance as well as the Earth outgoing radiation, which will pave the way to determine EEI from space.
ST4.1: 11:45–12:30
EGU Photo Competition
We received many impressive entries for the 2021 competition! You can find the ten finalists, and vote online for the winners, by Thursday 29 Apr at 18:00 CEST. Winners will be announced on Friday on geolog.egu.eu and in the last issue of EGU Today.
Meet vEGU21 Artist (not!) in Residence Andy Emery!
In addition to the latest Earth, planetary, and space science research, vEGU21 is also featuring the contributions of four talented artists, who are sharing their artwork via social media (using the hashtag #EGUart). One, Andy Emery (@AndyDoggerBank) is a Scottish-based geologist, geophysicist, climber, and creative writer working for Gavin & Doherty Geosolutions. A specialist in reconstructing past landscapes, Emery uses poetic prose to help communicate the latest research to other geoscientists and the public to help them understand why the work that geoscientists do is so important for addressing societal challenges.