Impact of anthropogenic aerosols on climate variability over Central Africa by using a regional climate model

2016 ◽  
Vol 37 (1) ◽  
pp. 249-267 ◽  
Author(s):  
A. J. Komkoua Mbienda ◽  
C. Tchawoua ◽  
D. A. Vondou ◽  
P. Choumbou ◽  
C. Kenfack Sadem ◽  
...  
Keyword(s):  
Climate Variability ◽  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Central Africa ◽  
Anthropogenic Aerosols

On the added value of the regional climate model REMO in the assessment of climate change signal over Central Africa

2017 ◽  
Vol 49 (11-12) ◽  
pp. 3813-3838 ◽  
Author(s):  
Thierry C. Fotso-Nguemo ◽  
Derbetini A. Vondou ◽  
Wilfried M. Pokam ◽  
Zéphirin Yepdo Djomou ◽  
Ismaïla Diallo ◽  
...  
Keyword(s):  
Climate Change ◽  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Central Africa ◽  
Added Value ◽  
Climate Change Signal

Assessment of simulated rainfall and temperature from the regional climate model REMO and future changes over Central Africa

2016 ◽  
Vol 48 (11-12) ◽  
pp. 3685-3705 ◽  
Author(s):  
Thierry C. Fotso-Nguemo ◽  
Derbetini A. Vondou ◽  
Clément Tchawoua ◽  
Andreas Haensler
Keyword(s):  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Central Africa ◽  
Simulated Rainfall

scholarly journals Influence of slab-ocean parametrization in a regional climate model (RegCM4) over Central Africa

2021 ◽  
Author(s):  
Francois Xavier Mengouna ◽  
Derbetini A. Vondou ◽  
A. J. Komkoua Mbienda ◽  
Thierry C. Fotso-Nguemo ◽  
Denis Sonkoué ◽  
...  
Keyword(s):  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Central Africa ◽  
Slab Ocean

scholarly journals Response of Karakoram‐Himalayan glaciers to climate variability and climatic change: A regional climate model assessment

2015 ◽  
Vol 42 (6) ◽  
pp. 1818-1825 ◽  
Author(s):  
Pankaj Kumar ◽  
Sven Kotlarski ◽  
Christopher Moseley ◽  
Kevin Sieck ◽  
Holger Frey ◽  
...  
Keyword(s):  
Climate Variability ◽  
Regional Climate Model ◽  
Climatic Change ◽  
Climate Model ◽  
Regional Climate ◽  
Model Assessment ◽  
Himalayan Glaciers

Downscaling large-scale climate variability using a regional climate model: the case of ENSO over Southern Africa

2012 ◽  
Vol 40 (5-6) ◽  
pp. 1141-1168 ◽  
Author(s):  
Damien Boulard ◽  
Benjamin Pohl ◽  
Julien Crétat ◽  
Nicolas Vigaud ◽  
Thanh Pham-Xuan
Keyword(s):  
Climate Variability ◽  
Regional Climate Model ◽  
Southern Africa ◽  
Large Scale ◽  
Climate Model ◽  
Regional Climate

Boundary layer schemes in the regional climate model RegCM4.6 over Central Africa

2021 ◽  
Author(s):  
A. J. Komkoua Mbienda ◽  
G. M. Guenang ◽  
S. Kaissassou ◽  
A. Tchakoutio Sandjon ◽  
R. S. Tanessong ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Regional Climate Model ◽  
Climate Model ◽  
Regional Climate ◽  
Central Africa

scholarly journals Aerosol indirect effects on summer precipitation in a regional climate model for the Euro-Mediterranean region

2018 ◽  
Vol 36 (2) ◽  
pp. 321-335 ◽  
Author(s):  
Nicolas Da Silva ◽  
Sylvain Mailler ◽  
Philippe Drobinski
Keyword(s):  
Regional Climate Model ◽  
Indirect Effects ◽  
Mediterranean Region ◽  
Climate Model ◽  
Regional Climate ◽  
Summer Precipitation ◽  
Cloud Microphysics ◽  
Radiative Heating ◽  
Direct Effects ◽  
Anthropogenic Aerosols

Abstract. Aerosols affect atmospheric dynamics through their direct and semi-direct effects as well as through their effects on cloud microphysics (indirect effects). The present study investigates the indirect effects of aerosols on summer precipitation in the Euro-Mediterranean region, which is located at the crossroads of air masses carrying both natural and anthropogenic aerosols. While it is difficult to disentangle the indirect effects of aerosols from the direct and semi-direct effects in reality, a numerical sensitivity experiment is carried out using the Weather Research and Forecasting (WRF) model, which allows us to isolate indirect effects, all other effects being equal. The Mediterranean hydrological cycle has often been studied using regional climate model (RCM) simulations with parameterized convection, which is the approach we adopt in the present study. For this purpose, the Thompson aerosol-aware microphysics scheme is used in a pair of simulations run at 50 km resolution with extremely high and low aerosol concentrations. An additional pair of simulations has been performed at a convection-permitting resolution (3.3 km) to examine these effects without the use of parameterized convection. While the reduced radiative flux due to the direct effects of the aerosols is already known to reduce precipitation amounts, there is still no general agreement on the sign and magnitude of the aerosol indirect forcing effect on precipitation, with various processes competing with each other. Although some processes tend to enhance precipitation amounts, some others tend to reduce them. In these simulations, increased aerosol loads lead to weaker precipitation in the parameterized (low-resolution) configuration. The fact that a similar result is obtained for a selected area in the convection-permitting (high-resolution) configuration allows for physical interpretations. By examining the key variables in the model outputs, we propose a causal chain that links the aerosol effects on microphysics to their simulated effect on precipitation, essentially through reduction of the radiative heating of the surface and corresponding reductions of surface temperature, resulting in increased atmospheric stability in the presence of high aerosol loads. Keywords. Atmospheric composition and structure (aerosols and particles)

Sign in / Sign up

Export Citation Format

Share Document