Max-Planck-Institute for Meteorology: Search

325.

Do clouds amplify global warming? EUREC4A field study tests hypothesized mechanisms

The science guiding the field campaign EUREC4A (Elucidating the role of clouds-circulation coupling in climate) and its measurements is presented in a recent publication by Prof. Bjorn Stevens, of the Max Planck Institute for Meteorology (MPI-M) in Hamburg, Dr. Sandrine Bony, of the Laboratoire de Météorologie Dynamique in Paris, Dr. David Farrell of the Caribbean Institute of Meteorology and Hydrology, and an international team of nearly three hundred co-authors.

326.

Future methane concentration underestimated in climate change scenarios

In a new study in Environmental Research Letters Dr Thomas Kleinen and Prof Victor Brovkin, researchers at the Max Planck Institute for Meteorology (MPI-M), together with Dr Sergey Gromov and Dr Benedikt Steil, researchers at the Max Planck Institute for Chemistry (MPI-C), showed that the changes in methane concentration under future warmer climate conditions have been severely underestimated.

327.

Earth’s albedo and its symmetry

In an article appearing in AGU Advances, Dr. George Datseris and Prof. Bjorn Stevens provide an analysis of the Earth’s albedo, its surprising symmetry between the two hemispheres, and how clouds make it possible.

328.

Are midlatitude weather and climate influenced by Arctic Amplification?

Many factors and regions can influence how the weather and the climate of the mid-latitudes may change under global warming. Particularly the dramatic changes over both the Arctic and the tropics exert a competing influence over the mid-latitudes atmospheric circulation that needs to be better understood and quantified. This tug-of-war between effects of the Artic and the tropics reflects the complexity of the different influences on the mid-latitude variability.

329.

The newest IPCC report – a look behind the scenes

A very personal account by Jochem Marotzke The just-published Assessment Report 6 (AR6) of the Intergovernmental Panel on Climate Change IPCC has produced headlines, as have its predecessors. “It is unequivocal that human influence has warmed the atmosphere, ocean, and land,” or “Global warming of 1.5 °C and 2 °C will be exceeded during the 21st century unless deep reductions in CO2 and other greenhouse gas emissions occur in the coming decades” are essential outcomes and have been widely…

330.

Variational data assimilation – one problem less

In a new study in the Journal of Nonlinear Science Dr Peter Korn, scientist and group leader in the department “The Ocean in the Earth system” at the Max Planck-Institute for Meteorology (MPI-M), investigates one class of data assimilation algorithms, namely variational data assimilation methods.

331.

New IPCC Assessment Report: Climate change widespread, rapid, and intensifying

How has climate changed up until the present? How will it change in the future? Questions like these are answered in the recently published first part of IPCC´s Sixth Assessment Report, which summarizes the scientific facts about climate change. This first part will be supplemented with two more parts in the coming spring, addressing adaptation to potential impacts of climate change and its potential mitigation. A synthesis report of the three parts will be published in autumn 2022.

332.

Past abrupt changes provide evidence of cascading tipping points and ‘early warning signals’ in the Earth system

Can climate change result in a collapse in parts of the Earth system, what impacts would these events have on society, and can they be predicted? In the article published in Nature Geoscience, an international team of natural and social scientists have reviewed abrupt shifts in the Earth's past in order to sharpen their tools for predicting the future. They used well-documented abrupt changes of the past 30 thousand years of geological history to illustrate how abrupt changes propagate through…

333.

The observed impact of mesoscale vertical motion on tropical clouds

A recent study by Geet George, Bjorn Stevens (both from the Max Planck Institute for Meteorology) and Marcus Klingebiel (now at Leipzig University) along with Sandrine Bony and Raphaela Vogel (Laboratoire de Météorologie Dynamique in Paris) shows that aspects of the atmospheric circulation tend to control low-level cloudiness at the mesoscale (20-200 km) more than the conventionally studied thermodynamic aspects.

334.

Waves and coherent flows in the tropical atmosphere: new opportunities, old challenges

In a review article appearing in the Quarterly Journal of the Royal Meteorological Society, Dr. Claudia Stephan (Max Planck Institute for Meteorology), Prof. Nedjeljka Žagar (Universität Hamburg) and Prof. Ted Shepherd (University of Reading) provide their perspective on present understanding of waves and coherent flows in the atmosphere, and their interaction.

335.

Exploiting large ensembles for a better yet simpler climate model evaluation

In a new study, Dr. Laura Suarez, Dr. Sebastian Milinski and Dr. Nicola Maher evaluate which models best capture the real-world climate with its internal variability and response to external forcings in observed surface temperatures. They used a novel framework that utilizes the unique design and power of SMILE experiments, single model initial-condition large ensembles from fully-coupled, comprehensive climate models.

336.

Cathy Hohenegger successfully habilitated at Universität Hamburg

Dr. Cathy Hohenegger, scientist and leader of the group “Precipitating Convection” at the Max Planck Institute for Meteorology (MPI-M), was awarded her Habilitation (the highest qualification level in the German university system) on 24 June 2021.