A5022654151- Cryospheric studies and observations
- Climate change and permafrost
- Hydrology and Watershed Management Studies
- Geology and Paleoclimatology Research
- Climate variability and models
- Meteorological Phenomena and Simulations
- Environmental and Cultural Studies in Latin America and Beyond
- Precipitation Measurement and Analysis
- Landslides and related hazards
- Arctic and Antarctic ice dynamics
- Plant Water Relations and Carbon Dynamics
- Pleistocene-Era Hominins and Archaeology
- Geological and Tectonic Studies in Latin America
- Isotope Analysis in Ecology
- Peatlands and Wetlands Ecology
- Polar Research and Ecology
- Winter Sports Injuries and Performance
- Geography and Environmental Studies
- Groundwater and Isotope Geochemistry
- Environmental and biological studies
- Soil erosion and sediment transport
- Hydrology and Drought Analysis
- Freshwater macroinvertebrate diversity and ecology
- Remote Sensing in Agriculture
- Evolution and Paleontology Studies
Université Grenoble Alpes
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institut polytechnique de Grenoble
2016-2025
Institut des Géosciences de l'Environnement
2017-2025
Institut de Recherche pour le Développement
2016-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2023-2025
Observatoire des sciences de l'Univers Paris-Saclay
2021
Observatoire des Sciences de l'Univers de Grenoble
2021
Université Joseph Fourier
2011-2015
Laboratoire de Glaciologie et Géophysique de l’Environnement
2013-2015
Abstract. The aim of this paper is to provide the community with a comprehensive overview studies glaciers in tropical Andes conducted recent decades leading current status context climate change. In terms changes surface area and length, we show that glacier retreat over last three unprecedented since maximum extension Little Ice Age (LIA, mid-17th–early 18th century). mass balance, although there have been some sporadic gains on several glaciers, trend has quite negative past 50 yr, mean...
Abstract The tropical glaciers of the Cordillera Blanca, Peru, are rapidly retreating, resulting in complex impacts on hydrology upper Río Santa watershed. effect this retreat water resources is evaluated by analyzing historical and recent time series daily discharge at nine measurement points. Using Mann-Kendall nonparametric statistical test, significance trends three hydrograph parameters was studied. Results interpreted using synthetic generated from a hydrologic model that calculates...
Abstract In an attempt to estimate the spatial and temporal behaviour of rainfall over mountainous areas Peruvian Andes, a new in situ monthly dataset has been collected (1998–2007) compared with Tropical Rainfall Measuring Mission (TRMM) 3B43 precipitation data for regions located above 3000 m. The reliability TRMM varies depending on root mean squared error ratio (%RMSE) correlation coefficient. Because discrepancy between two datasets, use additive multiplicative correction models is...
Abstract The supply of glacier water to La Paz city, Bolivia, between 1963 and 2006 was assessed at annual seasonal timescales based on the mass-balance quantification 70 glaciers located within drainage basins Paz. Glaciers contributed ∼15% resources an scale (14% in wet season, 27% dry season). Uncertainties our estimation are related assumed constant precipitation (∼0.5% for ice-free areas up 6.5% glaciated areas), runoff coefficient (∼1%), surface catchments (∼5%) mean uncertainty 21...
Abstract The rapid retreat of the glaciers Cordillera Blanca is having a noticeable impact on downstream hydrology. Although groundwater critical hydrologic component that sustains stream flows during dry season, its characteristics and contribution to hydrology remain poorly understood. In this study, we analyse hydrochemical isotopic properties potential sources mixing in surface streams characterize proglacial four glacially fed watersheds within Blanca, Peru. Water samples from streams,...
Modern hydrology relies on multiple sources of information combined with climatological, hydrological and glaciological data. These data can be collected through various such as private initiatives by companies, research programs, both national international organisms. They also vary types, e.g. in-situ measurements, satellite, reanalysis simulated Recently the ANDEX project, a GEWEX regional program, was created to understand processes related cycle energy fluxes in Andean region from...
Abstract. The impacts of the accelerated glacier retreat in recent decades on runoff changes are still unknown most Andean catchments, increasing uncertainties estimating water availability. This particularly affects outer tropics and Dry Andes, heavily impacted by prolonged droughts. Current global estimates overlook climatic morphometric disparities, which significantly influence model parameters, among glaciers. Meanwhile, local studies have used different approaches to estimate a few...
Abstract. In the face of climate change and increasing anthropogenic pressures, a reliable water balance is crucial for understanding drivers level fluctuations in large lakes. However, poorly gauged hydrosystems such as Lake Titicaca, most components are not measured directly. Previous estimates this lake have relied on scaling factors to close balance, which introduces additional uncertainty. This study presents an integrated modeling framework based conceptual models quantify natural...
Abstract The melting of tropical glaciers provides water resources to millions people, involving social, ecological and economic demands. At present, these reservoirs are threatened by the accelerating rates mass loss associated with modern climate changes related greenhouse gas emissions ultimately land use/cover change. Until now, effects change on Andean South America through biomass burning activities have not been investigated. In this study, we quantitatively examine hypothesis that...
Abstract. We present a novel approach to simulate and reconstruct annual glacier-wide surface mass balance (SMB) series based on deep artificial neural network (ANN; i.e. learning). This method has been included as the SMB component of an open-source regional glacier evolution model. While most models tend incorporate more physical processes, here we take alternative by creating parameterized model data science. Annual SMBs can be simulated from topo-climatic predictors using either learning...
Upper Madeira Basin (975,500 km2) in Southern Amazonia, which is suffering a biophysical transition, involving deforestation and changes rainfall regime. The evolution of the runoff coefficient (Rc: runoff/rainfall) examined as an indicator environmental (1982–2017). At annual scale, Rc at Porto Velho station declines while neither basin-averaged nor change. During low-water period diminish no are observed rainfall. This cannot be explained by increase evapotranspiration since actual...
Retreating glaciers, icons of climate change, release new potential habitats for both aquatic and terrestrial organisms. High‐elevation species are threatened by temperature increases the upward migration lowlands species. Improving our understanding successional processes after glacier retreat becomes urgent, especially in tropics, where shrinkage is particularly fast. We examined patterns invertebrates, ground beetles, plants, soil eukaryotes (algae, plants) an equatorial foreland...
The 2022-23 hydrological year in the Lake Titicaca, Desaguadero River, and Poopó system (TDPS) over South American Altiplano constituted a historically dry period. This drought was particularly severe during pre-wet season (October–December), when TDPS adjacent Andean-Amazon region experienced as much 60% reductions rainfall. Consequently, Titicaca water levels decreased by 0.05 m from December to January, which is part of rising lake level period normal conditions. Such conditions have not...
This paper presents a model of Andean glacier hydrology which can be used to assess the water management implications possible future retreat. The approach taken uses Water Evaluation and Planning (WEAP) system integrates both hydrologic processes representations operations built infrastructure. is applied in Rio Santa watershed Peru illustrate how alternative strategies simulated. WEAP platform for this study has been engage with local stakeholders management.
Abstract. The estimation of precipitation over the broad range scales interest for climatologists, meteorologists and hydrologists is challenging at high altitudes tropical regions, where spatial variability important while in situ measurements remain scarce largely due to operational constraints. Three different types rainfall products – ground based (kriging interpolation), satellite derived (TRMM3B42), atmospheric model outputs (WRF Weather Research Forecasting) are compared 1...
Climate change is considered as one of the main factors controlling sediment fluxes in mountain belts. However, effect El Niño, which represents primary cause inter-annual climate variability South Pacific, on river erosion and transport Western Andes remains unclear. Using an unpublished dataset Suspended Sediment Yield (SSY) Peru (1968-2012), we show that annual SSY increases by 3-60 times during Extreme Niño Events (EENE) compared to normal years. During EENE, 82% 97% occurs from January...
Abstract A myriad of downstream communities and industries rely on streams fed by both groundwater discharge glacier meltwater draining the Cordillera Blanca, Northern Peruvian Andes, which contains highest density glaciers in tropics. During dry season, approximately half region's proglacial comes from groundwater. However, because remote difficult access to region, there are few field methods that effective at reach scale identify spatial distribution discharge. An energy balance model,...
Our paleoprecipitation map of the Altiplano reveals atmospheric processes underlying a major hydroclimatic change 16 ka ago.