EGU Letters 

Concurrent temperature extremes are becoming common but there is no climatology of such extremes in the literature. This study provides a climatology for concurrent heatwaves and cold spells and a programming toolbox to study such phenomena. This dataset and toolbox will be of interest to a wide readership, expecially those interested in climate and climate change science.

The authors apply the statistical method of conditional dispersion, which evaluates the existence of causal connections between variables, to study relations between seismic activity and global warming. This is a very actual and debated topic in the geosciences community. In this work, the authors find no causality between seismic activity and global warming.

The core element of climate change is the sensitivity of the Earth's climate system to the balance between incoming solar radiation and outgoing terrestrial radiation at the top of the atmosphere. CO2 is one of the key atmospheric parameters controlling the outgoing longwave radiation. In this paper, hyper-spectral satellite data of the outgoing long wave radiation from a decade of observations are successfully used for the first time to disentangle the radiative effect of CO2 increase from those of other relevant parameters such as temperature and water vapour variations. The paper demonstrates convincingly that the observed radiative changes agree excellently with theoretical predictions of outgoing long wave radiation changes due to the observed CO2 increase. While solely based on observations from space, these results confirm a fundamental theoretical underpinning of the science of global warming.

This manuscript is published as SOIL Letters publication as it provides a timely and important contribution, formulating six fundamental principles for the robust study of soil carbon saturation. This is an important topic in research on soil carbon and its role in climate change mitigation which should be of interest to the wider geoscience community.