Implementation of Aerosol-Cloud Interaction within WRF-CHIMERE Online Coupled Model: Evaluation and Investigation of the Indirect Radiative Effect from Anthropogenic Emission Reduction on the Benelux Union

Article Article scientifique Article Implementation of Aerosol-Cloud Interaction within WRF-CHIMERE Online Coupled Model: Evaluation and Investigation of the Indirect Radiative Effect from Anthropogenic Emission Reduction on the Benelux Union eng 2019 author Tuccella Paolo author Menut Laurent author Briant Régis 830700 author Deroubaix Adrien author Khvorostyanov Dmitry author Mailler Sylvain author Siour Guillaume author Turquety Solène 20 10.3390/atmos10010020 2073-4433 https://www.mdpi.com/2073-4433/10/1/20 The indirect effects of aerosol are particularly important over regions where meteorological conditions and aerosol content are favourable to cloud formation. This was observed during the Intensive Cloud Aerosol Measurement Campaign (IMPACT) (European Integrated project on Aerosol Cloud Climate and Air quality Interaction (EUCAARI) project) in the Benelux Union during May 2008. To better understand this cloud formation variability, the indirect effects of aerosol have been included within the WRF-CHIMERE online model. By comparing model results to the aircraft measurements of IMPACT, to surface measurements from EMEP and AIRBASE and to MODIS satellite measurements, we showed that the model is able to simulate the variability and order of magnitude of the observed number of condensation nuclei (CN), even if some differences are identified for specific aerosol size and location. To quantify the impact of the local anthropogenic emissions on cloud formation, a sensitivity study is performed by halving the surface emissions fluxes. It is shown that the indirect radiative effect (IRE) at the surface is positive for both shortwave and longwave with a net warming of +0.99 W/m2. In addition, important instantaneous changes are modelled at local scale with up to ±6 °C for temperatures and ±50 mm/day for precipitation. Aerosol indirect effect Online model Meteorology-chemistry coupled model Model evaluation WRF-CHIMERE model Dewey 333.7-333.9 18 Institut des sciences de l'environnement 0DB false 915 Climatic Change and Climate Impacts Atmosphere 10 1 d9cb643c-6ead-4dc9-8d28-24b09ba81832 Article (Published version) Public atmosphere-10-00020.pdf 8143470 application/pdf CC BY openAccess Centres et instituts / Institut des sciences de l'environnement

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Implementation of Aerosol-Cloud Interaction within WRF-CHIMERE Online Coupled Model: Evaluation and Investigation of the Indirect Radiative Effect from Anthropogenic Emission Reduction on the Benelux Union	Atmosphere			2019	400	167

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