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Cloud-cloud interaction in convective precipitation

Total Cost €


EC-Contrib. €






 INTERACTION project word cloud

Explore the words cloud of the INTERACTION project. It provides you a very rough idea of what is the project "INTERACTION" about.

emphasize    dynamics    develops    numerical    resolution    pool    explicit    rises    occurs    triggered    interacting    surroundings    climate    descriptions    tackled    space    extremes    risk    cutting    vapor    describing    experiments    parameterization    reveals    wake    organization    models    once    memory    observations    forcing    amended    convection    sub    model    adjustment    relax    water    departure    capture    list    interact    dependence    onset    cloud    highlight    ground    precipitation    events    temperature    separation    self    extreme    eddy    carry    severe    precipitate    feedback    unexpected    perform    instantaneous    interaction    parameterizations    gradual    circulation    suppressed    outflow    quasi    paradigm    driving    timescale    state    equilibrium    grid    scientific    interactions    breaking    convective    clouds    simulations    organize    shows    observational    shortcoming    conventional    atmospheric    variables    conceptual    cold    edge    recovery    capturing   

Project "INTERACTION" data sheet

The following table provides information about the project.


Organization address
address: NORREGADE 10
postcode: 1165

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Denmark [DK]
 Total cost 1˙314˙800 €
 EC max contribution 1˙314˙800 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2017-COG
 Funding Scheme ERC-COG
 Starting year 2018
 Duration (year-month-day) from 2018-07-01   to  2023-06-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    KOBENHAVNS UNIVERSITET DK (KOBENHAVN) coordinator 1˙314˙800.00


 Project objective

State-of-the-art simulations and observations highlight the self-organization of convective clouds. Our recent work shows two aspects: these clouds are capable of unexpected increase in extreme precipitation when temperature rises; interactions between clouds produce the extremes. As clouds interact, they organize in space and carry a memory of past interaction and precipitation events. This evidence reveals a severe shortcoming of the conventional separation into 'forcing' and 'feedback' in climate model parameterizations, namely that the 'feedback' develops a dynamics of its own, thus driving the extremes. The major scientific challenge tackled in INTERACTION is to make a ground-breaking departure from the established paradigm of 'quasi-equilibrium' and instantaneous convective adjustment, traditionally used for parameterization of 'sub-grid-scale processes' in general circulation models. To capture convective self-organization and extremes, the out-of-equilibrium cloud field must be described. In INTERACTION, I will produce a conceptual model for the out-of-equilibrium system of interacting clouds. Once triggered, clouds precipitate on a short timescale, but then relax in a 'recovery' state where further precipitation is suppressed. Interaction with the surroundings occurs through cold pool outflow,facilitating the onset of new events in the wake. I will perform tailored numerical experiments using cutting-edge large-eddy simulations and very-high-resolution observational analysis to determine the effective interactions in the cloud system. Going beyond traditional forcing-and-feedback descriptions, I emphasize gradual self-organization with explicit temperature dependence. The list of key variables of atmospheric water vapor, temperature and precipitation must therefore be amended by variables describing organization. Capturing the self-organization of convection is essential for understanding of the risk of precipitation extremes today and in a future climate.


year authors and title journal last update
List of publications.
2020 Olga Henneberg, Bettina Meyer, Jan O. Haerter
Particle‐based tracking of cold pool gust fronts
published pages: , ISSN: 1942-2466, DOI: 10.1029/2019ms001910
Journal of Advances in Modeling Earth Systems 2020-03-05

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The information about "INTERACTION" are provided by the European Opendata Portal: CORDIS opendata.

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