NextG Climate Science EUREC4A-OA

EUREC4A-OA

NextG Climate Science EUREC4A-OA

The atmosphere and ocean drive processes in one another through air-sea interaction mechanisms-primarily mixing in turbulent boundary layers. In the trade wind regions, shallow convection and mesoscale circulations in which they are embedded supplement convective mixing in the atmospheric boundary layer. Both shallow convection and its mesoscale signature are thought to influence and be influenced by their interaction with the ocean. Improving the representation of small-scale nonlinear ocean- atmosphere interactions in Climate Models by innovative joint observing and modeling approaches. EUREC4A-OA will implement ad-hoc innovative observations and a hierarchy of numerical simulations focusing on mesoscale and submesoscale ocean dynamics and the atmospheric boundary layer at scales ranging from 20 m to 1000 km over the northwest tropical North Atlantic. The aim is to advance our knowledge of the phenomenology and representation of air-sea interactions, physical and biogeochemical ocean small-scale non-linear processes in Earth System Models (ESM) but also in Numerical Weather Predictions (NWP), sub-seasonal to seasonal (S2S) and decadal forecasts operational systems. EUREC4A-OA will bring together international specialists of ocean, atmosphere physical and biogeochemical observations and numerical modelling as well as scientists working on numerical parameterization, operational systems and future projections to address four objectives: 1. Assessing the impact of the diurnal cycle on energy, water and CO2 ocean-atmosphere exchanges and quantifying the modification of diurnal cycle and the related exchanges by meso-scale and submesoscale features and other extreme conditions 2.The identification and quantification of the processes ruling the ocean-atmosphere exchanges and uptake of heat, momentum and CO2 at the ocean nonlinear small scales (from a few tens of meters to 500 km) 3. The role of various processes (diurnal cycle, ocean nonlinear small scales, boundary layer aerosols) on the atmosphere shallow convection and cloud formation 4. To provide improved models metrics and parameterizations for the above processes to be integrated in operational prediction systems and ESMs. EUREC4A-OA associated partners (12 international institutions contributing with more than 35 scientists) will cooperate in integrating new knowledge into improved model metrics and parameterizations. EUREC4A-OA results will enhance capability to deliver novel information that will have a significant impact on science and society.

June, 2020

May, 2023

163000

-

BMBF /

Laboratoire de Météorologie Dynamique (LMD), France

Johannes Karstensen

International Center for Environmental Monitoring (CIMA), Italy
National Centre for Meteorological Research (CNRM), France
Helmholtz-Zentrum Hereon, Germany
Laboratoire d’Etudes en Géophysique et Océanographie Spatiales (LEGOS), France
Laboratoire de Météorologie Dynamique de l’Institut Pierre-Simon Laplace (LMD-IPSL), France
Laboratoire d’Océanographie et du Climat (LOCEAN), France
Laboratoire d’Océanographie Physique et Spatiale (LOPS), France
Max Planck Institute for Meteorology (MPIMET), Germany
Nansen Environmental and Remote Sensing Center (NERSC), Norway
Department of Earth and Environmental Sciences (UNIMIB), Italy
University of Bergen, Norway

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