A5035889668- Precipitation Measurement and Analysis
- Meteorological Phenomena and Simulations
- Flood Risk Assessment and Management
- Soil Moisture and Remote Sensing
- Hydrology and Watershed Management Studies
- Cryospheric studies and observations
- Climate variability and models
- Hydrology and Drought Analysis
- Agriculture and Rural Development Research
- Radio Wave Propagation Studies
- Atmospheric aerosols and clouds
- Soil erosion and sediment transport
- Geophysics and Gravity Measurements
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Landslides and related hazards
- Aeolian processes and effects
- Tropical and Extratropical Cyclones Research
- Power Line Communications and Noise
- Groundwater and Watershed Analysis
Institut des Géosciences de l'Environnement
2018-2023
Institut polytechnique de Grenoble
2014-2023
Université Grenoble Alpes
2010-2023
Institut de Recherche pour le Développement
2010-2023
Centre National de la Recherche Scientifique
2014-2023
Institute for Research and Development
2015
Laboratoire de Glaciologie et Géophysique de l’Environnement
2015
Université Joseph Fourier
2015
Abstract Rainfall monitoring based on commercial terrestrial microwave links is tested for the first time in Burkina Faso, Sahelian West Africa. In collaboration with one national cellular phone operator, Telecel attenuation a 29 km long link operating at 7 GHz was monitored 1 s rate monsoon season 2012. The series of transformed into rain rates and compared gauge data. method successful quantifying rainfall: 95% rainy days are detected. correlation daily 0.8, bias 6%. 5 min step within each...
Core Ideas AMMA‐CATCH is a long‐term critical zone observatory in West Africa. Four sites sample the sharp ecoclimatic gradient characteristic of this region. Combined measurements meteorology, water, and vegetation dynamics began 1990. Intensification rainfall hydrological cycles observed. The strong overall re‐greening may hide contrasted changes. Africa region fast transition from climate, demography, land use perspectives. In context, African Monsoon Multidisciplinary Analysis...
CORRESPONDING AUTHOR: Marielle Gosset, GET, 14 av Edouard Belin, 31400 Toulouse, France, E-mail: marielle.gosset@ird.fr
Abstract Devastating floods have plagued many West African cities in the past decades. In an attempt to reduce flood damage Bamako (Mali), early warning system (EWS) demonstrator (Raincell App) was developed for flash floods. On 16 May 2019, while partially operational, intense rainfall event led devastating We carried out experience feedback on this by comparing EWS simulations results of a field survey. Given synoptic situation and rapid development pattern storm, none global forecasting...
Abstract High-resolution rain fields are a prerequisite to many hydrometeorological studies. For some applications, the required resolution may be as fine 1 km in space and 5 min time. At these scales, rainfall is strongly intermittent, variable space, correlated time because of propagation rainy systems. This paper compares two interpolation approaches generate high-resolution from gauge measurements: (i) classic technique that consists interpolating independently intensities at each step...
Abstract The present study investigates the multi‐scale processes associated with a sequence of convective events that occurred over Niamey during period 25–26 July 2006. This corresponds to active stage first intense monsoon surge Sahel for During this two‐day period, two successive sequences mesoscale systems (MCSs) were located ahead and in phase trough an African Easterly Wave (AEW). They followed by suppressed or isolated convection behind vicinity ridge. large AMMA‐SOP dataset,...
The RadAlp experiment aims at developing advanced methods for rain and snow estimation using weather radar remote sensing techniques in high mountain regions improved water resource assessment hydrological risk mitigation. A unique observation system has been deployed the French Alps, Grenoble region. It is composed of a Météo-France operated X-band MOUC (volumetric, Doppler polarimetric) on top Mt Moucherotte (1920 m ASL), XPORT research Doppler, polarimetric), K-band micro (MRR, vertically...
Abstract Massachusetts Institute of Technology C‐band radar observations are integrated with rainfall measurements from an extensive network gauges in Niamey, Niger, West Africa, for the African Monsoon and Multidisciplinary Analysis (AMMA). The large number available enabled Z e – R power‐law relationships convective stratiform regions individual squall lines. based solely on directly over were developed estimate attendant latent heat release (by other AMMA investigators) where unavailable....
Abstract The particle identification scheme developed by Dolan and Rutledge for X-band polarimetric radar is tested the first time in Africa compared with situ measurements. data were acquired during Megha-Tropiques mission algorithm-validation campaign that occurred Niger 2010. classification observations gathered an instrumented aircraft 13 August 2010 squall-line case. An original approach has been radar–in comparison: it consists of simulating synthetic variables from microphysical-probe...
Abstract This study addresses clouds with significant ice water content (IWC) in the stratiform regions downwind of convective cores African squall lines framework French–Indian satellite Megha-Tropiques project, observed August 2010 next to Niamey (13.5°N, 2°E) southwestern part Niger. The objectives included comparing IWC– Z reflectivity relationship for precipitation radars deep anvils, collocating from ground radar calculated situ microphysics all aircraft locations inside range, and...
Abstract. The RadAlp experiment aims at developing advanced methods for rainfall and snowfall estimation using weather radar remote sensing techniques in high mountain regions improved water resource assessment hydrological risk mitigation. A unique observation system has been deployed since 2016 the Grenoble region of France. It is composed an X-band operated by Météo-France on top Moucherotte (1901 m above sea level; hereinafter MOUC radar). In valley (220 a.s.l.), we operate a research...
Abstract A simple scheme that is based on the shape and intensity of radar bright band used to infer density hydrometeors just above freezing level in Sahelian mesoscale convective systems (MCS). Four MCS jointly observed by a ground-based X-band an instrumented aircraft as part Megha-Tropiques algorithm-validation campaign during August 2010 Niamey, Niger, are analyzed. The (with 94-GHz various optical probes board) provided mass–diameter laws for particles sampled flights. derived from...
Intensification of the hydrological cycle resulting from climate change in West Africa poses significant risks for region's rapidly urbanising cities, but limited research on flood risk has been undertaken at urban domain scale. Furthermore, conventional models are unable to realistically represent type intense storms which dominate African monsoon. This paper presents a decision-first framing co-production climate-hydrology-flooding modelling chain, linking scientists working...
Abstract. The RadAlp experiment aims at improving quantitative precipitation estimation (QPE) in the Alps thanks to X-band polarimetric radars and situ measurements deployed region of Grenoble, France. In this article, we revisit physics propagation attenuation microwaves rain. We first derive four attenuation–reflectivity (AZ) algorithms constrained, or not, by path-integrated attenuations (PIAs) estimated from decrease return selected mountain targets when it rains compared their dry...
<p>The RadAlp experiment at the Grenoble region in French Alps aims to advance radar remote sensing techniques of precipitation high mountain regions. Since 2016, two dual-polarimetric X-band radars, one on top Mt Moucherotte (1901 m asl) and another valley (220 are operated by Metro France IGE respectively. High spatio-temporal variability (e.g. intensity phase) complex terrain requires high-resolution observations. provides spatial temporal resolution imagery which makes it...