Project description
A closer look at Antarctica’s changing atmosphere
How does the atmospheric water cycle work in Antarctica? The EU-funded AWACA project will strive to answer this question, improving our understanding of how snow in Antarctica forms, falls and in what quantity. To understand and predict the fate of atmospheric water including isotopes all along the tropospheric column, the project will apply a consistent and comprehensive combined observation and modelling framework. AWACA will also combine adapted/designed instruments to form fully autonomous observation platforms deployed at several sites along a 1 100 km coast-to-plateau transect aligned with the typical moisture-carrying air mass trajectories. The findings will help scientists gain a deeper understanding of past, present and future variabilities.
Objective
Climate models predict that precipitation will increase in Antarctica, which will moderate global sea-level rise. Meanwhile, the isotopic composition of snowfall records climate parameters which can be recovered in ice cores. However, there are still major gaps in our understanding of the atmospheric water cycle over Antarctica. For the first time, the AWACA project will provide a consistent and comprehensive combined observation and modeling framework to understand and predict the fate of atmospheric water all along the tropospheric column. Specifically adapted/designed instruments will be combined to form observation platforms deployed at 5 sites along a 1100 km coast-to-plateau transect aligned with the typical moisture-carrying air mass trajectories. The challenges of working in full autonomy in Antarctica, never addressed to such an extent before, will be tackled by collaborating with experts in polar technology and logistics. The resulting data set will make possible the study of the processes driving the water fluxes and composition to an unprecedented level, and the gained insights will be a strong basis to develop new physics parameterizations for regional and climate models. Once validated along the transect but also in other regions of Antarctica thanks to satellite observations and past campaigns, those models will enable us to decipher the past and future variability of the atmospheric water cycle over Antarctica.
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Funding Scheme
ERC-SyG - Synergy grantHost institution
75794 Paris
France