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Atmospheric Chemistry and Physics

Remote sensing of methane leakage from natural gas and petroleum systems revisited

The switch from the use of coal to natural gas or oil for energy generation potentially reduces the impact on global warming due to lower CO 2 emissions with the same energy content. However, this climate benefit is offset by fugitive methane emissions during the production and distribution process. We quantify emission and leakage rates relative to production for several large production regions based on satellite observations to evaluate the climate footprint of the gas and oil industry.


Earth System Dynamics

Incremental improvements of 2030 targets insufficient to achieve the Paris Agreement goals

Current global mitigation ambition in the National Determined Contributions (NDCs) up to 2030 is insufficient to achieve the 1.5 °C long-term temperature limit. As governments are preparing new and updated NDCs for 2020, we address the question of what level of collective ambition is pivotal regarding the Paris Agreement goals. We provide estimates for global mean temperature increase by 2100 for different incremental NDC update scenarios and illustrate climate impacts under those scenarios.


Hydrology and Earth System Sciences

Survival of the Qaidam mega-lake system under mid-Pliocene climates and itsrestoration under future climates

During the Pliocene, the Qaidam Basin on the Tibetan Plateau contained a mega-lake system. During the Pleistocene, it disappeared almost completely. Today, hyperarid climates prevail in the low-altitude parts of the basin. This study reveals that today’s mean water balance of the Qaidam Basin is nearly zero and is positive during warmer, less dry years. The results explain how the mega-lake system could survive for a long time in the past and could eventually be restored in the future.


Biogeosciences

The recent state and variability of the carbonate system of the CanadianArctic Archipelago and adjacent basins in the context of ocean acidification

Ocean acidification is the process by which the oceans are changing due to carbon dioxide emissions from human activities. Studying this process in the Arctic Ocean is essential as this ocean and its ecosystems are more vulnerable to the effects of acidification. Water chemistry measurements made in recent years show that waters in and around the Canadian Arctic Archipelago are considerably affected by this process and show dynamic conditions that might have an impact on local marine organisms.


Latest posts from EGU blogs

Must-read papers in tectonics and structural geology – Hubbert and Rubey 1959

Must-read papers in tectonics and structural geology – Hubbert and Rubey 1959

“The Role of Fluid Pressure in Mechanics of Overthrust Faulting” by Hubbert and Rubey is a “groundbreaking” article from the end of the 1950s. It’s a remarkable piece of research, written in an old-fashioned way, for modern standards. Many ECS that may not have read the original paper yet are certainly familiar with its textbook content. Let’s go quickly through it! The article, as a key point, originally explains how fluid pressure aids low-angle tectonic transport of massive sheets of …


Xavier Sánchez-Vila (2020 Henry Darcy Medallist) on these strange times and the usefulness of scientific thinking

Xavier Sánchez-Vila (2020 Henry Darcy Medallist) on these strange times and the usefulness of scientific thinking

The EGU 2020 Henry Darcy Medal of the EGU Division on Hydrological Sciences was awarded to Xavier Sánchez-Vila in recognition of his innovative theoretical work and practical solutions regarding aquifer characterisation, subsurface solute transport processes and managed aquifer recharge. Given the online EGU 2020 GA, the medal lecture was however postponed to 2021. We then invited Xavi to write something to the HS community in a blog post, following these strange times… Strange times, indeed! We have moved from business …


Locking people up to program — or: “What is a hackathon?”

Locking people up to program — or: “What is a hackathon?”

This week the seventh yearly hackathon of the geodynamics code ASPECT is taking place. But what actually is a hackathon, why is it useful and how did it get started in the first place? This week, Wolfgang Bangerth, one of the founders of ASPECT, explores all these questions for us. Due to the intensity of a hackathon, he wrote this article before the start of the hackathon. It’s really not possible to put this any other way: There is no …