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Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics

This team, putting together members of the BIOMAC, ABC3 and CLIM teams, aims to bring together scientists working on the components of the climate system (atmosphere, oceans, continents) and more specifically on their interactions via a set of processes: physical, biogeochemical and chemical. Our research aims to understand the role of human activities on climate and on the main biogeochemical cycles, and more precisely the respective shares of forcings and internal interactions in the response of the climate system. We are particularly interested in the variability of climate and of biogeochemical cycles, from the seasonal to the secular scale, in different climatic contexts (present, future, past).


Our working tool is the IPSL Earth System model (LMDz-INCA-ORCHIDEE-NEMO-PISCES). Our common characteristics / objectives are (among others):

  • To represent the processes making it possible to better understand and analyze the model's responses to global (e.g. greenhouse gas, insolation) and / or regional forcings (e.g. chemistry / aerosols, land uses);
  • To quantify the role of regional forcings (chemistry / aerosols, land uses) in global and regional climate sensitivity, identifying the different time responseof the main feedbacks;
  • To study the effects (impacts) of different climate change scenarios on different environments via the INCA, PISCES, ORCHIDEE models;
  • To develop simulations at very high resolution (global or by regional zooms), in order to better take into account the interactions between biology (continental & marine) and climate, between heterogeneous forcings (local to regional) and climate, between the processes at finer scales (eg intra-canopy chemistry) and climate;
  • To contribute to the construction of the IPSL ESM model, working in particular on (a) ocean-atmosphere & climate-cycles coupling, (b) energy adjustment and identification of the respective roles of the ocean and atmosphere in different cycles (energy, water, heat);
  • To systematize simulated climate assessment in order to facilitate the study of the relevance of the addition of new parameterizations in the model.

Figure caption: global paleodust compilation for the Holocene period (Albani et al., 2015, Clim. Past)


  • DUSC3 Project (Samuel Albani)

My main research interests include the interpretation of paleoclimate records and quantifying the role of mineral (desert) dust in the Earth System. My reserch tools have included experimental work (on Antarcitc ice cores), the compilation of observational datasets, and last but not least numerical simulations with global (and regional) Earth System models.

Thanks to a Marie Curie Individual Fellowship I am now at LSCE working with Yves Balkanski and other colleagues on the project DUSC3 (DUST, CLIMATE AND THE CARBON CYCLE). DUSC3 aims at studying the direct and indirect impacts of dust on the climate system of the Earth, in particular during the Last Glacial Maximum, through simulations with the IPSL-CM model, constrained by the compilation of an innovative global paleodust database covering the last 130,000 years. The project started in December 2016 for 2 years.

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  • Inclusion of ozone damages in LPJmL and Development of a semi-empirical model for yield forecasts (Bernhard Schauberger, PhD at PIK, visitor at LSCE)

Time scale: both projects should be finished by mid 2017
Models: LPJmL, semi-empirical regression model


Change in carbon export efficiency in the variable stoichiometry PISCES-QUOTA model under RCP8.5. a, The global carbon to nutrient export ratios at 100 m relative to mean 1990s values and b, the spatial distribution of C:N export anomalies and c, C:P export anomalies in the 2090s relative to mean 1990s values.


  • CRESCENDO (Coordinated Research in Earth Systems and Climate: Experiments, kNowledge, Dissemination and Outreach)

Objectives of the project:

Analysis of the role of spatial resolution (0.25°, 0.50°, 2°) and variable stoichiometry on global ocean biogeochemistry projections across the PISCES family of models.

Emergent constraints on projections of marine primary production in the global ocean. Relating interannual NPP variability and long-term sensitivity across the CMIP5 model ensemble in conjunction with satellite observations. (Kwiatkowski et al. in review)

Lester Kwiatkowski, CRESCENDO postdoctorate researcher (18 months July 2017 - Feb 2018).

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  • Imbalance-P (Effects of phosphorus limitations on Life, Earth system and Society)

Analysis and development of the PISCES-QUOTA variable C:N:P stoichiometry model. Focussing on understanding the implications of variable phytoplankton stoichiometry on centennial scale projections of ocean carbon uptake, primary production, food quality and trophic interactions. (Kwiatkowski et al. in prep)

Lester Kwiatkowski, IMBALANCE-P postdoctorate researcher (18 months Feb 2016 - July 2017).

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  • (LUC4C) Land-use change: assessing the net climate forcing, and options for climate change mitigation and adaptation

Objectives of the project:

Climate change and land-use change are essential environmental challenges to society that are also inseparably linked: the climate shapes the way people use land, by affecting food and water supplies; land-use change contributes to global and regional climate change by affecting land biogeochemical and biophysical processes. In addition to the direct impacts of climate change on ecosystems, management practices for climate change adaptation or mitigation (for instance avoiding deforestation, or promoting the use of bioenergy) also affect the supply of ecosystem services, and impact on other important societal goals (such as energy security or trade balances). The interplay between land use and climate change is therefore fundamental in understanding land-based climate mitigation options and how societies will adapt to climate change in the future. LUC4C aims to provide progress towards quantitative understanding of impacts and feedbacks in the coupled human-land-climate system, and the role people play.

Devaraju Narayanappa, LUC4C postdoctorate researcher (Xx).

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Last update : 04/11 2017 (94)

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