Contents
News
We will soon be looking for a post-doc on tropical cyclone modeling with water isotopes, with a start in January-April 2025. The job profile will be issued soon.
Project summary
Rainfall projections in the tropics are subject to large uncertainty. Past rainfall changes offer insight into how rainfall responds to climate changes. However, rainfall reconstructions diverge in some regions depending on whether they are based on the water isotopic composition or on other proxies.
The goal of this project is to address this long-standing enigma. Our hypothesis is that isotopic proxies are more sensitive to the type of storms from which the rain falls, than to the rate of the rainfall. To check this hypothesis, we will investigate how the type of storm impacts the water isotopic composition, based on storm-resolving simulations evaluated against in-situ and satellite observations. We will implement a representation of this impact in the LMDZ general circulation model to address the role of the type of storm on isotopic variations at the climatic scale. We will combine paleoclimate simulations with this model with existing isotopic and non-isotopic proxies to quantify the role of the storm type on isotopic variations at the paleoclimatic scale.
Hopefully this project will lead to a new paradigm in the interpretation of isotopic proxies. It will also build bridges between the storm and paleoclimate communities.
The full proposal is available here.
Teams
This project involves several laboratories:- LMD/IPSL (convection, LMDZ, parameterization development): Camille Risi, Nicolas Rochetin
- LSCE/IPSL (water isotopes observations and modeling): Françoise Vimeux, Sébastien Fromang
- CEREGE (convection, LMDZ, parameterization development): (paleoclimate): G Leduc, O Cartapanis, A Alexandre and F Sylvestre
- LAERO (convection): C Barthe
Funding
The project is funded by the Agence Nationale de la Recherche (ANR) from January 2025 to December 2028.
Publications
Soon.
Outreach
Soon.