A5069930144- Climate variability and models
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Precipitation Measurement and Analysis
- Agriculture and Rural Development Research
- Hydrology and Drought Analysis
- Hydrology and Watershed Management Studies
- Climate change impacts on agriculture
- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Energy and Environment Impacts
- Flood Risk Assessment and Management
- African Botany and Ecology Studies
- Plant Water Relations and Carbon Dynamics
- Ocean Waves and Remote Sensing
- Solar Radiation and Photovoltaics
- Cocoa and Sweet Potato Agronomy
- Oceanographic and Atmospheric Processes
- Atmospheric and Environmental Gas Dynamics
- Landslides and related hazards
- Geophysics and Gravity Measurements
- Water-Energy-Food Nexus Studies
- Soil erosion and sediment transport
- Plant Ecology and Soil Science
- Aeolian processes and effects
Institut des Géosciences de l'Environnement
2017-2025
Université Grenoble Alpes
2016-2025
Université Félix Houphouët-Boigny
2015-2025
Centre National de la Recherche Scientifique
2016-2025
Institut polytechnique de Grenoble
2014-2025
Institut de Recherche pour le Développement
2016-2025
West African Science Service Centre on Climate Change and Adapted Land Use
2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2024
European Automobile Manufacturers Association
2022
Ministère de l’Environnement et du Développement Durable
2022
African Monsoon Multidisciplinary Analysis (AMMA) is an international project to improve our knowledge and understanding of the West monsoon (WAM) its variability with emphasis on daily-to-interannual time scales. AMMA motivated by interest in fundamental scientific issues societal need for improved prediction WAM impacts nations. Recognizing develop strategies that reduce socioeconomic WAM, will facilitate multidisciplinary research required provide predictions impacts. This be achieved...
Intraseasonal variability in the West African monsoon is documented by using daily gridded datasets of rainfall and convection, reanalyzed atmospheric fields, over period 1968–90. Rainfall convection Africa are significantly modulated at two intraseasonal timescales, 10–25 25–60 day, leading to variations more than 30% seasonal signal. A composite analysis based on dates maximum (minimum) a regional index wet (dry) sequences shows that these last, average, 9 days belong main quasiperiodic...
Abstract AMMA—the African Monsoon Multidisciplinary Analysis—is the biggest programme of research into environment and climate ever attempted in Africa. AMMA has involved a comprehensive field experiment bringing together ocean, land atmospheric measurements, on time‐scales ranging from hourly daily variability up to changes seasonal activity over number years. Many publications this special issue make use subsets collected diverse set sensors. As general introduction issue, paper provides...
In this study, we investigate changes in temperature and precipitation extremes over West Central Africa (hereafter, WAF domain) as a function of global mean with focus on the implications warming 1.5 °C 2 according Paris Agreement. We applied scaling approach to capture climate increase several subregions within domain: Western Sahel, Eastern Guinea Coast including Congo Basin.
Abstract Heat and discomfort indices are applied to the multimodel ensemble mean of COordinated Regional climate Downscaling EXperiment‐Africa regional model projections investigate future changes in heat stress proportion human population at risk under 1.5 °C 2 global warming scenarios over West Africa. The results show that category Extreme Caution is projected extend spatially (up 25%) most Gulf Guinea, Sahel, Sahara desert areas, with different coverage during various seasons. Similarly,...
Climate change has emerged across many regions. Some observed regional climate changes, such as amplified Arctic warming and land-sea contrasts have been predicted by models. However, other changes in tropical sea surface temperature monsoon rainfall are not well simulated model ensembles even when taking into account natural internal variability structural uncertainties the response of models to anthropogenic radiative forcing. This suggests predictions may fully reflect what our future...
Sahelian rainfall is characterized both by a strong interannual variability and periods of long‐lasting droughts, such as the years 1970–1997. The controlling factors this have been subject significant amount research, but most research carried out using low‐resolution averages, typically, monthly to seasonal in time over 5° × grid boxes (or larger) space. This paper an attempt at characterizing regime finer scales, with objective establishing links between cycle variability. To that end,...
This article describes the upper-air program, which has been conducted as part of African Monsoon Multidisciplinary Analysis (AMMA). Since 2004, AMMA scientists have working in partnership with operational agencies Africa to reactivate silent radiosonde stations, renovate unreliable and install new stations regions particular climatic importance. A comprehensive network is now active over West contributed high-quality atmospheric monitoring three monsoon seasons. During period June September...
CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 75:155-162 (2018) - DOI: https://doi.org/10.3354/cr01515 West African Sahel has become wetter during last 30 years, but dry spells are shorter and more frequent Adeline Bichet*, Arona Diedhiou Univ. Grenoble Alpes, IRD, CNRS, INP, IGE, 38000 Grenoble, France *Corresponding author: adeline.bichet@univ-grenoble-alpes.fr ABSTRACT:...
Abstract Using 17 years (1998–2014) of daily TRMM 3B42 rainfall data, we provide a climatological characterization wet and dry spells in West Africa, which should serve to assess the ability climate model simulate these high impact events. The study focuses on four subregions (Western Central Sahel, Sudanian zone Guinea Coast). Defining (dry) as sequences consecutive days with precipitation higher (lower) than 1 mm, describe space‐time variability spell occurrence. This climatology stresses...
Abstract The development of renewable electricity in Africa could be massive coming decades, as a response to the rapid rising demand while complying with Paris Agreements. This study shows that high-resolution climate experiments CORDEX-AFRICA, annual mean solar potential is expected decrease on average by 4% over most continent end century, reaching up 6% Horn Africa, direct result radiation and increase air surface temperature. These projections are associated large uncertainties,...
This study aims to provide improved knowledge and evidence on current (1986–2015) climate variation based six rainfall indices over five West African countries (Senegal, Niger, Burkina Faso, Ivory Coast, Benin) using the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) dataset. On average, precipitation has increased central Sahel western Sahel. increase is associated in number of rainy days, longer wet spells shorter dry spells. Over Guinea slight an intensity a duration...
Abstract Many solar photovoltaic (PV) energy projects are currently being planned and/or developed in West Africa to sustainably bridge the increasing gap between electricity demand and supply. However, climate change will likely affect power generation atmospheric factors that control it. For first time, state-of-the-art CMIP models (CMIP6) used investigate potential future evolution of its main drivers Africa. A multi-model analyses carried out revealed a decrease PV throughout 21st...
Abstract This study investigates the impact of increased global warming on heat stress changes and potential number people exposed to risks over Africa. For this purpose a index has been computed based an ensemble‐mean high‐resolution regional climate model simulations from Coordinated Output for Regional Evaluations embedded in COordinated Climate Downscaling EXperiment, under two Representative Concentration Pathways (RCPs) scenarios (RCP2.6 RCP8.5), combined with projections population...
Abstract A reference case of a Sahelian weather system observed during the Hydrological Atmospheric Pilot Experiment, HAPEX‐SAHEL, in August 1992, is described from seasonal viewpoint as well synoptic and convective viewpoints. It shown that case‐study representative climatology at all these scales presents many interacting physical processes. At intraseasonal scale, monsoon onset characterized by an abrupt shift precipitation together with latitudinal migration African easterly jet (AEJ)...
Abstract. A multi-platform field measurement campaign involving aircraft and balloons took place over West Africa between 26 July 25 August 2006, in the frame of concomitant AMMA Special Observing Period SCOUT-O3 African tropical activities. Specifically aiming at sampling upper troposphere lower stratosphere, high-altitude research M55 Geophysica was deployed Ouagadougou (12.3° N, 1.7° W), Burkina Faso, conjunction with German D-20 Falcon, while a series stratospheric sonde flights were...
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Abstract. Latent and sensible heat surface fluxes are key factors of the western African monsoon dynamics. However, few long-term observations these land available; needed to increase understanding underlying processes assess their impacts on energy water cycles at surface–atmosphere interface. This study analyzes turbulent one full year, measured with eddy covariance technique, over a cultivated area in northern Benin (western Africa). The site is part AMMA–CATCH (African Monsoon...