PalMod Seminar Series
Wed. 19. Jan 2021, 15 h
G.Lohmann (AWI): Simulation the Glacial Climate and Ocean Circulation: Challenges for PalMod
L. Jonkers (MARUM): Are climate models underestimating spatial temperature variability?
Seminar IUP Heidelberg: Climate variability across scales
Thu. 3.12.2020 16h Tine Nilsen (UIT, Norway): Decadal variability and the scaling paradigm”.
Talks from PalMod II KickOff
Talks in German (28.05.2020):
Overview talk in English (08.07.2020):
Sorry, we do not have any open positions in the PalMod II project yet.
Natural methane emissions – from the glacial to the present
In a new study in Climate of the Past Kleinen, Mikolajewicz, and Brovkin (Max Planck Institute for Meteorology), were able to show that the changes in methane concentration between the Last Glacial Maximum (LGM, about 20000 years ago) and the preindustrial late Holocene (PI), 300 years ago, can be explained entirely by changes in the natural methane emissions caused by environmental changes.
Natural net emissions of methane in the present-day climate. Credit: Thomas Kleinen
Kleinen, Thomas , Mikolajewicz, Uwe und Brovkin, Victor (2020) Terrestrial methane emissions from the Last Glacial Maximum to the preindustrial period. Climate of the Past, 16 (2). pp. 575-595. DOI 10.5194/cp-16-575-2020.
Recent Highlights - PalMod Publication
Freshwater release and elevation loss affect climate during Heinrich events
A team of researchers around Dr. Florian Ziemen at the Max Planck Institute for Meteorology found that Heinrich events, climate changes during the last ice age, were caused by a succession of the effects of two mechanisms: iceberg calving, having effects on the ocean, and ice sheet elevation loss, having effects on the atmosphere. Using a novel model setup, they were able to study the relationship between the two individual effects. They were the first to observe the succession of both effects in one simulation.
Citation: Ziemen, F., Kapsch, M.-L., Klockmann, M., & Mikolajewicz, U. (2019). Heinrich events show two-stage climate response in transient glacial simulations. Climate of the Past, 15, 153-168. doi:10.5194/cp-15-153-2019
How cold was Antarctica during the last ice age?
In a recent study by scientists from the Alfred Wegener Institute together with French colleagues temperature changes in Antarctica during the last ice age have been reconstructed. Ice core data and model results indicate a much stronger cooling of West Antarctica than East Antarctica during that time. Furthermore, the study enabled a new estimate of Antarctic ice sheet height changes during this past climate stage. The results of this study have been recently published in Nature Communications.
Citation: Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer; Martin Werner, Jean Jouzel, Valérie Masson-Delmotte & Gerrit Lohmann; Nature Communicationsvolume 9, Article number: 3537 (2018)
Throughout the last 800,000 years, Antarctic temperatures and atmospheric carbon dioxide concentrations showed a similar evolution. However, this was different during the transition to the last ice age: approximately 80,000 years ago, temperature declined, while the carbon dioxide content of the atmosphere remained relatively stable. An international research team led by the GEOMAR Helmholtz Centre for Ocean Research Kiel and the Alfred-Wegener-Institute Helmholtz Centre for Polar and Marine Research has now discovered that a falling sea level may have caused enhanced volcanic activity in the ocean, which can explain the anomaly. The results are published today in the journal Nature Communications.