In a new paper by Stella Bourdin, Lukas Kluft and Bjorn Stevens the authors found a dependence of climate sensitivity on the given distribution of relative humidity. Lead author Stella Bourdin visited the department “The Atmosphere in the Earth System” at the Max Planck Institute for Meteorology for an internship when she was a masters student from École Centrale Paris and is now a PhD candidate within the Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL, Paris-Saclay…
The Max Planck Institute for Meteorology (MPI-M) has renewed its Gender Equality Plan (GEP) to further facilitate equal opportunities for all genders and to support compatibility for family life and career. The GEP of MPI-M is an institute specific policy, which responds to guidelines set forth by the Max Planck Society. In it, targets and actions are identified, pooled and coordinated to advance equality of opportunity. The renewed GEP was drafted by the gender equality officers Andrea…
The recently published book “The Ozone Layer, From Discovery to Recovery” is a fascinating reading from the discovery of ozone in the 19th century through the late 20th century international agreements to protect humanity from the destruction of ozone in the stratosphere. The author portrays the evolution of scientific knowledge on air quality issues and stratospheric chemistry and dynamics (Brasseur, 2020a). The book is easy to read and understand, just like a science history novel. The author…
In a new publication in Geophysical Research Letters led by Chris D. Jones from the Met Office Hadley Centre, in Exeter, UK, a group of 49 scientists from different institutions including Wolfgang Müller, Tatiana Ilyina, Claudia Timmreck, Hongmei Li, and Michael Botzet from the Max Planck Institute for Meteorology (MPI-M), addressed one of the currently most timely questions, how reduced emissions of aerosols and greenhouse gases during the lockdown restrictions due to the COVID-19 pandemic in…
Today, JSBACH is the land component of the two Earth System models at the Max Planck Institute for Meteorology (MPI-M), MPI-ESM and ICON-ESM. Work on it started in the early 2000s. At that time, Ernst Maier-Reimer was already routinely using his HAMOCC model of ocean biogeochemistry in the ocean-atmosphere coupled model MPI-OM/ECHAM (in those days worldwide known as "the" MPI model). To close the global carbon cycle and thereby make the MPI model a true Earth System model, only the necessary…
In a new study Jule Radtke, Dr Cathy Hohenegger and Prof Thorsten Mauritsen have investigated the representation and climate feedback of trade-wind clouds in high-resolution simulations while degrading the horizontal resolution from hectometre (large-eddy resolving) to kilometre (convective storm resolving) scales. They found that the cloud feedback is positive when simulated with kilometre but near zero when simulated with hectometre horizontal resolution.
In a new study scientists Dr Nicola Maher and Prof Jochem Marotzke from the Max Planck Institute for Meteorology (MPI-M) in collaboration with Prof Scott Power from Monash University (Melbourne) have more accurately quantified model-to-model agreement in strongly forced long-term projections of temperature, precipitation, and their temporal variability.
In a recent study Dr. Tatiana Ilyina, Dr. Hongmei Li, Aaron Spring and Dr. Wolfgang Müller, scientists at the Max Planck Institute for Meteorology, and a team of international colleagues used a set of prediction systems based on Earth-system models to establish predictive skills of the ocean and land carbon sinks and to infer predictability of the atmospheric CO2 growth rate. They found an emerging capacity of the initialized Earth-system model simulations for predicting the global carbon cycle.
A group of scientists at the Max Planck Institute for Meteorology (MPI-M) were recognized for their co-authorship of the paper "The added value of large-eddy and storm-resolving models for simulating clouds and precipitation”, which was awarded the 2020 Meteorological Society of Japan Publication Award. The paper demonstrates the ability of models run at hecto- and kilo-meter scales, to surmount long standing obstacles hindering more accurate climate predictions. Models run at kilometer scales…
After the peak of the last ice age about 21,000 years ago, the great ice masses that had covered large parts of North America and northern Europe began to retreat, reaching their present extent about 8,000 to 6,000 years ago. The beginning of the Holocene, the geologic period in which we now live, is dated to about 11,000 years before present, after the last major climate oscillation in the transition from the Ice Age to the present warm phase. The climate and climate changes of the Holocene…
Researchers at the Max Planck Institute for Meteorology (MPI-M) and colleagues used a machine learning approach to reconstruct a monthly climatology of Mapped Observation-Based Oceanic Dissolved Inorganic Carbon (MOBO-DIC) in the upper ocean. The study, which has just been published in Global Biogeochemical Cycles, was led by Dr Lydia Keppler, from Dr Peter Landschützer’s group “Observations, Analysis and Synthesis” and involved collaborations with the former MPI-M member Dr Irene Stemmler and…
At the end of October 2020, the German Committee Future Earth (DKN) approved Prof. Julia Pongratz and Prof. Victor Brovkin to establish a working group for modeling human-environmental interactions in the Anthropocene (HERMITIAN).
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