A5015261578- Geophysics and Gravity Measurements
- Oceanographic and Atmospheric Processes
- Ocean Waves and Remote Sensing
- Artificial Immune Systems Applications
- Flood Risk Assessment and Management
- Hydrology and Watershed Management Studies
- Metaheuristic Optimization Algorithms Research
- Atmospheric and Environmental Gas Dynamics
- Evolutionary Algorithms and Applications
- Machine Learning in Bioinformatics
- Mathematical and Theoretical Epidemiology and Ecology Models
- Arctic and Antarctic ice dynamics
- Advanced Multi-Objective Optimization Algorithms
- Soil Moisture and Remote Sensing
- Gene Regulatory Network Analysis
- Evolutionary Game Theory and Cooperation
- Web Data Mining and Analysis
- Advanced Text Analysis Techniques
- Cryospheric studies and observations
- Soil erosion and sediment transport
- vaccines and immunoinformatics approaches
- Remote Sensing in Agriculture
- Protein Structure and Dynamics
- GNSS positioning and interference
- Chaos control and synchronization
Laboratoire d’Études en Géophysique et Océanographie Spatiales
2016-2025
Institut de Recherche pour le Développement
2015-2024
Université de Toulouse
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Université Toulouse III - Paul Sabatier
2015-2023
Observatoire Midi-Pyrénées
2015-2022
Ecopetrol (Colombia)
2019
Universidad Nacional de Colombia
2003-2013
Communication, Information, Médias
2007-2012
University of Memphis
2000-2010
Abstract The Convention on Biological Diversity ( CBD ) aims at the conservation of all three levels biodiversity, that is, ecosystems, species and genes. Genetic diversity represents evolutionary potential is important for ecosystem functioning. Unfortunately, genetic in natural populations hardly considered strategies because it difficult to measure has been hypothesised co‐vary with richness. This means richness taken as a surrogate planning, though their relationship not properly...
Radar altimetry is now commonly used for the monitoring of water levels in large river basins. In this study, an altimetry-based network virtual stations was defined quasi ungauged Ogooué basin, located Gabon, Central Africa, using data from seven missions (Jason-2 and 3, ERS-2, ENVISAT, Cryosat-2, SARAL, Sentinel-3A) 1995 to 2017. The performance five latter retrieve stages discharges assessed through comparisons against gauge station records. All exhibited a good agreement with records,...
Abstract Climate-related sea level changes in the world coastal zones result from superposition of global mean rise due to ocean warming and land ice melt, regional caused by non-uniform thermal expansion salinity changes, solid Earth response current water mass redistribution associated gravity change, plus small-scale processes (e.g., shelf currents, wind & waves fresh input rivers, etc.). So far, satellite altimetry has provided gridded time series up 10–15 km coast only, preventing...
Abstract For nearly 30 years, space-based radar altimetry has been routinely measuring changes in sea level at global and regional scales. But this technique designed for the open ocean does not provide reliable data within 20 km to coast, mostly due land contamination echo vicinity of coast. This problem can now be overcome through dedicated reprocessing, allowing retrieval valid 0-20 band from then access novel information on change world coastal zones. Here we present anomalies associated...
Abstract. The 2015–2016 El-Niño and related ocean warming has generated significant coral bleaching mortality worldwide. In Indonesia, the first signs of were reported in April 2016. However, this El Niño impacted Indonesian reefs since 2015 through a different process than temperature-induced bleaching. September 2015, altimetry data show that sea level was at its lowest past 12 years, affecting corals living bathymetric range exposed to unusual emersion. March 2016, Bunaken Island (North...
Abstract. The satellite radar altimetry record of sea level has now surpassed 30 years in length. These observations have greatly improved our knowledge the open ocean and are an essential component many operational marine systems climate studies. But use close to coast remains a challenge from both technical scientific point view. Here, we take advantage recent availability new algorithms developed for computation quantify analyze uncertainties associated with choice when approaching coast....
In the context of ESA Climate Change Initiative Sea Level project, we performed a complete reprocessing high resolution (20 Hz, i.e., 350m) along-track altimetry data Jason-1, Jason-2 and Jason-3 missions over January 2002 to June 2021 in world coastal zones. This provides sea level time series associated trends from coast 50 km offshore study period. We call ‘virtual stations’ closest point coast. creates new network 1160 virtual sites well distributed along coastlines....
This paper describes a technique based on immunological principles for novel (anomalous) pattern detection. It is probabilistic method that uses negative selection scheme (complement space) to detect any changes in the normal behavior of monitored data patterns. The compared with positive approach (implemented by an ART neural network), which (self-) space anomaly Some experimental results both cases are reported.
Abstract The summer South Vietnam Upwelling (SVU) is a major component of the China Sea circulation where it also influences ecosystems. Here we revisit existing knowledge SVU interannual variability. Based on set 15‐year eddy‐resolving sensitivity simulations, quantify respective contributions from different factors (atmospheric, river, and oceanic forcings; ocean intrinsic variability; El Niño Southern Oscillation) to this variability explore underlying mechanisms. Our sea surface...
This paper presents a framework to generate multi-shaped detectors with valued negative selection algorithms (NSA). In particular, can take the form of hyper-rectangles, hyper-spheres and hyper-ellipses in non-self space. These novel pattern (in complement space) are evolved using genetic search (the structured algorithm), which uses hierarchical genomic structures gene activation mechanism encode multiple detector shapes. GA) allows maintaining diverse shapes while contributing...
This study presents results of calibration/validation (C/V) Jason-1 and Jason-2 satellite altimeters over Lake Issykkul located in Kyrgyzstan, which was chosen as a dedicated radar altimetry C/V site 2004. The objectives here are to estimate absolute altimeter biases quantify the instrument error budgets for lakes studies, including errors associated with atmosphere media delay corrections signal, different retracking mode used "nonocean" surface. is conducted using various equipments,...
Abstract. In the context of ESA Climate Change Initiative project, we are engaged in a regional reprocessing high-resolution (20 Hz) altimetry data classical missions number world's coastal zones. It is done using ALES (Adaptive Leading Edge Subwaveform) retracker combined with X-TRACK system dedicated to improve geophysical corrections at coast. Using Jason-1 and Jason-2 satellite data, high-resolution, along-track sea level time series have been generated, trends computed over 14-year span...