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Reference : UMR7159-MYRKHO-010
Workplace : PARIS 05
Date of publication : Tuesday, January 05, 2021
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 15 February 2021
Proportion of work : Full time
Remuneration : Net monthly gross salary: between 2 291€ and 3 815 € (commensurate with experience - includes social insurance
Desired level of education : PhD
Experience required : Indifferent
Investigating volcanic forcing and its influence on past and future climate variability
Volcanic eruptions are unpredictable and sporadic events but the impacts of large events on the atmosphere and climate are, in principle, more predictable assuming that key eruption parameters such as sulphur loading are known. It has become apparent from climate models, instrumental observations, proxy and historical records, that eruptions reaching high into the atmosphere (i.e. stratosphere) can have a significant global cooling effect, that they have modulated past climate variability and may contribute to mitigate anthropogenic global warming in the 21st century. Such volcanic effects are now recognised in near-term decadal prediction systems through idealized climate model scenarios and initialized ocean conditions.
Based on the complementary scientific expertise of an international consortium, the Synergia CALDERA project aims at exploring the processes/mechanisms controlling volcanic aerosols distribution and life cycle after large stratospheric eruptions and their effects on global modes of climate variability (such as the AMOC, ENSO, IPO or monsoons) over the last 2000 years and during the 21st century.
The successful candidate will design model experiments with the IPSL Ocean-Atmosphere Global Climate Model (OAGCM) including interactive aerosol microphysics to investigate the formation and evolution of volcanic aerosols, reconstruct volcanic forcing, and simulate the impacts on the global climate system. The post-doctoral scientist will use estimates of volcanic sulphur loadings inferred from ice cores for the largest eruptions of the last 2000 years and perform short experiments for key eruptions of the Common Era (CE). The first objectives will be to simulate the time-varying distribution, size and optical properties of volcanic aerosols for the different eruptions, assess the uncertainty ranges of reconstructed volcanic forcing, and study the general climate response including the possible impact on the ozone layer following the eruptions.
In collaboration with the other scientists of the project, the post-doctoral scientist will investigate how the simulated volcanic forcing can influence climate variability on interannual, decadal to secular timescales in interaction with well-established climate spatiotemporal modes (i.e. ENSO, AMO, AMOC), and evaluate the simulations against climate proxy and historical records. The post-doctoral scientist will also analyse large ensemble experiments with the IPSL-CM6 OAGCM to explore the influence of ocean initial conditions on the simulated climate response to volcanic forcing. All the model development and running experiments will be carried out with the support of the IPSL project team (including a computing engineer) so that the post-doctoral scientist can be fully involved in scientific analyses and publication of the results in peer-reviewed journals. Detailed studies will also be carried out to assess the climate impacts of probabilistic volcanic eruptions scenarios on future climate projections.
- PhD in climatology, Earth science or related field (physics, informatics)
- Publication(s) in peer-reviewed international journals
- Solid experience in programming and in managing large data sets
- Strong motivation and interest for a research career
- Demonstrated verbal and written communication skills in English
- Interest in working in a multidisciplinary environment.
The LOCEAN laboratory (https://locean-ipsl.upmc.fr) is one of the nine laboratories in the Paris region in environmental and climate sciences of the Institut Pierre-Simon Laplace (IPSL) (https://www.ipsl.fr). The activity of the host team at LOCEAN (VARCLIM) focuses on the study of the physical processes that control the dynamics and variability of the ocean and climate over a wide range of time and space scales for a better understanding of the climate system and its present, past and future evolution. The close synergy between the scientific teams of LOCEAN and other laboratories gathered within the IPSL Climate Modelling Centre (https://cmc.ipsl.fr) allows research and development of a climate model based on the integration of several components for the atmosphere, ocean, sea ice and continental surfaces. It regularly participates in international exercises such as the Climate Model Intercomparison Project on which the work of the Intergovernmental Panel on Climate Change (IPCC) is based. The modelling activity is based both on GENCI's major national computing centres and on a dedicated IT infrastructure located at IPSL. The postdoctoral scientist will join a very dynamic scientific team at LOCEAN and will work closely with LATMOS teams and about ten engineers and researchers who are at the heart of the development of the IPSL's climate model. The position is based on the Pierre and Marie Curie campus of Sorbonne University in Paris.
Full time position for 24 months (can be expanded to 36 months).
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