JOST-DIEDRICH GRAF VON HARDENBERG

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Full Professor

Coordinatore di ambito Energy and Climate Change (Green Team)
Member of Interdepartmental Center (SmartData@PoliTO - Big Data and Data Science Laboratory)

+39 0110905645 / 5645 (DIATI)

Research area HYDROLOGY AND HYDRAULIC CONSTRUCTIONS
Research projects Critical Earth - Multiscales and critical transitions in the Earth System
Research projects

Funded by competitive calls

  • Climate Impacts of the Atlantic Meridional Overturning Circulation, (2021-2023) - Responsabile Scientifico

    UE-funded research - H2020 - Excellent Science - Marie Curie

    View project record on CORDIS

    ERC sectors

    PE10_3 - Climatology and climate change PE10_2 - Meteorology, atmospheric physics and dynamics PE10_8 - Oceanography (physical, chemical, biological, geological)

    SDG

    Obiettivo 13. Promuovere azioni, a tutti i livelli, per combattere il cambiamento climatico*

    Abstract

    CliMOC is a proposal to fund a fellowship to be carried out by the Experienced Researcher (ER) Katinka Bellomo at host institution Polytechnic University of Turin, Italy (POLITO) in the department of Environment, Land and Infrastructure Engineering under the supervision of main host professor Jost von Hardenberg. The aim of the proposed work is to investigate the role of the Atlantic Meridional Overturning Circulation (AMOC) on climate impacts over Europe. Previous studies have shown an important role for the AMOC in modulating global climate change, in particular over the Northern Hemisphere and Europe. An AMOC collapse has been identified as a possible trigger of the initiation of Ice Ages. However, the influence of AMOC in future climate change is still unclear given the large inter-model uncertainty in the decline rate of AMOC, and the concurrent climate changes due to increasing concentrations of well-mixed greenhouse gases in the atmosphere. In this proposal, we advance some hypotheses for the role of AMOC in the current climate and future climate change, and we propose a hierarchy of climate model simulations to separate the role of AMOC from other processes. More specifically, we plan to implement a slab-ocean model component in the EC-Earth global climate model. Using the ocean heat fluxes from a fully-coupled EC-Earth simulation in which the AMOC is artificially weakened, we will be able to run a slab-ocean EC-Earth simulation with a high-resolution atmospheric component, which will let us investigate the role of AMOC in future climate change impacts over Europe. This work will help reduce the uncertainties in projections of future climate change by constraining the influence of AMOC.

    Departments

  • CriticalEarth: Multiscales and Critical Transitions in the Earth System, (2021-2025) - Responsabile Scientifico

    UE-funded research - H2020 - Excellent Science - Marie Curie

    View project record on CORDIS

    ERC sectors

    SH2_7 - Environmental and climate change, societal impact and policy PE10_3 - Climatology and climate change

    SDG

    Obiettivo 4. Fornire un’educazione di qualità, equa ed inclusiva, e opportunità di apprendimento per tutti

    Abstract

    The objective of CriticalEarth is to train a cohort of exceptional young scientists, and to advance our understanding of tipping points and assess possible connections between tipping elements in the climate. Fundamental development of the mathematics involved in such multi-scale problems and methods for exploring rare events and critical transitions in computationally heavy state-of-the-art climate models are in focus. The dynamical behavior of complex systems such as the climate in terms of bifurcations and the dependence on stochastic fluctuations as well as the feedbacks involved in the physical processes causing critical transitions will be subject of the research. This is important for underpinning the planetary boundaries and the response to increased levels of greenhouse gases. Ultimately, defining the thresholds for irreversible climate change is a grand scientific challenge and a matter of huge societal importance. Predicting the future climate beyond the linear response to greenhouse forcing, developing early warning systems and quantifying safe operating spaces are challenges for the next generation of scientists. CriticalEarth will train 15 early stage researchers to develop new methods for assessing the mechanisms and associated risks of critical transitions in the climate. The program will enable them to generate, integrate and apply multidisciplinary knowledge from applied mathematics, climate science (paleo and projected future) and numerical simulations. The network will give them an excellent background for collaborating in cross-disciplinary teams in academia, industry, governmental- and non-governmental institutions. CriticalEarth's main outcomes will be (i) a cohort of trained scientists within a research field with high demand for years to come; (ii) a ground-breaking understanding of multiscale dynamics in the Earth system and (iii) better foundations for understanding and better tools for assessing and avoiding irreversible climate change.

    Countries

    • Norvegia
    • Regno Unito
    • Germania
    • Francia
    • Belgio
    • Spagna
    • Italia
    • Paesi Bassi

    Institutes/Companies

    • UNIVERSITETET I TROMSOE - NORGES ARKTISKE UNIVERSITET
    • THE UNIVERSITY OF EXETER
    • THE UNIVERSITY OF READING
    • TECHNISCHE UNIVERSITAET MUENCHEN
    • ECOLE NORMALE SUPERIEURE DE LYON
    • INSTITUT ROYAL METEOROLOGIQUE DE BELGIQUE
    • UNIVERSIDAD COMPLUTENSE DE MADRID
    • POLITECNICO DI TORINO
    • UNIVERSITEIT UTRECHT
    • CARL VON OSSIETZKY UNIVERSITAET OLDENBURG
    • FREIE UNIVERSITAET BERLIN

    Departments