A5024983209- Atmospheric chemistry and aerosols
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Isotope Analysis in Ecology
- Climate variability and models
- Winter Sports Injuries and Performance
- Air Quality Monitoring and Forecasting
- Environmental and Cultural Studies in Latin America and Beyond
- Aeolian processes and effects
- Methane Hydrates and Related Phenomena
- Tree-ring climate responses
- Vehicle emissions and performance
- Marine and environmental studies
- Magnetic confinement fusion research
- Polar Research and Ecology
- Landslides and related hazards
- Planetary Science and Exploration
- Toxic Organic Pollutants Impact
- Arctic and Antarctic ice dynamics
- Pleistocene-Era Hominins and Archaeology
Université Grenoble Alpes
2015-2024
Institut des Géosciences de l'Environnement
2014-2024
Institut de Recherche pour le Développement
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Institut polytechnique de Grenoble
2012-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2023-2024
Institute of Engineering
2024
Météo-France
2013-2019
Observatoire des sciences de l'Univers Paris-Saclay
2012-2019
Observatoire des Sciences de l'Univers de Grenoble
2013-2019
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. Accurate measurement of black carbon (BC) mass concentrations in snow and ice is crucial for the assessment climatic impacts. However, it difficult to compare methods used assess BC levels literature as they are not same. The single particle soot photometer (SP2) method appears be one most suitable measure low ice. In this paper, we evaluated a quantification refractory (rBC) samples coupling SP2 with APEX-Q nebulizer. paper reviews all steps rBC determination, including...
Abstract. We applied a climate-chemistry global model to evaluate the impact of black carbon (BC) deposition on Himalayan snow cover from 1998 2008. Using stretched grid with resolution 50 km over this complex topography, reproduces reasonably well remotely sensed observations duration. Similar observations, modelled atmospheric BC concentrations in central Himalayas reach minimum during monsoon and maximum post- pre-monsoon periods. Comparing simulated is more challenging because their high...
Abstract. This paper presents the light-scattering properties of atmospheric aerosol particles measured over past decade at 28 ACTRIS observatories, which are located mainly in Europe. The data include particle light scattering (σsp) and hemispheric backscattering (σbsp) coefficients, Ångström exponent (SAE), backscatter fraction (BF) asymmetry parameter (g). An increasing gradient σsp is observed when moving from remote environments (arctic/mountain) to regional urban environments. At a...
Abstract. A shallow ice core was extracted at the summit of Mera Peak 6376 m a.s.l. in southern flank Nepalese Himalaya range. From this core, we reconstructed seasonal deposition fluxes dust and refractory black carbon (rBC) since 1999. This archive presents well preserved cycles based on a monsoonal precipitation pattern. According to regime which 80% annual falls between June September, estimated changes concentrations these aerosols surface snow. The analyses revealed that mass are few...
Abstract. Global models predict that new particle formation (NPF) is, in some environments, responsible for a substantial fraction of the total atmospheric number concentration and subsequently contributes significantly to cloud condensation nuclei (CCN) concentrations. NPF events were frequently observed at highest observatory world, on Chacaltaya (5240 m a.s.l.), Bolivia. The present study focuses impact CCN population. Neutral cluster Air Ion Spectrometer mobility size spectrometer...
Sublimation dominates the ablation process on cold, high‐altitude glaciers in tropical Andes. Transport of water vapor through firn and exchange with ambient moisture alter stable isotope composition surface layers. A sublimation experiment carried out during an ice core drilling campaign Cerro Tapado (5536 m above sea level, 30°08′S, 69°55′W) revealed a strong enrichment 2 H 18 O content layer. Concerning deuterium excess, decrease occurred at daytime, while night, values remained...
Abstract. Black carbon (BC) in snow the Himalayas has recently attracted considerable interest due to its impact on albedo, and glacier melting, regional climate water resources. A single particle soot photometer (SP2) instrument was used measure refractory BC (rBC) a series of surface samples collected upper Khumbu Valley, Nepal between November 2009 February 2012. The obtained time indicates annual cycles with maximum rBC concentrations before onset monsoon season fast decreases during...
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...
Urban development, growing industrialization, and increasing demand for mobility have led to elevated levels of air pollution in many large cities Latin America, where quality standards WHO guidelines are frequently exceeded. The conurbation the metropolitan area La Paz/El Alto is one fastest urban settlements South America with particularity being located a very complex terrain at high altitude. As or areas, Altiplano region facing deterioration. Long-term measurement data equivalent black...
Abstract. In 2011 four ice cores were extracted from the summit of Alto dell'Ortles (3859 m), highest glacier South Tyrol in Italian Alps. This drilling site is located only 37 km southwest where Tyrolean Iceman, ∼ 5.3 kyrs old, was discovered emerging ablating field Tisenjoch (3210 m, near Italian–Austrian border) 1991. The excellent preservation this mummy suggested that Iceman continuously embedded prehistoric and additional ancient likely preserved elsewhere Tyrol. Dating based on 210Pb,...
Abstract. Black carbon (BC), emitted by fossil fuel combustion and biomass burning, is the second largest man-made contributor to global warming after dioxide (Bond et al., 2013). However, limited information exists on its past emissions atmospheric variability. In this study, we present first high-resolution record of refractory BC (rBC, including mass concentration size) reconstructed from ice cores drilled at a high-altitude eastern European site in Mt. Elbrus (ELB), Caucasus (5115 m...
Abstract. Ice cores are one of the most valuable paleo-archives. Records from ice provide information not only about amount dust in atmosphere, but also sources and their changes past. In 2009, a 182 m long core was recovered western plateau Mt Elbrus (5115 a.s.l.). This record further extended after shallow drilled 2013. Here we analyse Ca2+ concentrations, commonly used proxy dust, recorded these records over time period 1774–2013 CE. The reveals quasi-decadal variability with generally...
Glaciers in the dry Chilean Andes provide important ecological services, yet their mass-balance response to past and ongoing climate change has been little studied. This study examines recent (2002-2015), historical (1955-2005) (5000 m), using a combination of glaciological, geodetic, ice core observations. Mass balance predominantly negative since 2002. Analysis meteorological data 2002 suggests that mass is currently mostly sensitive precipitation variations, while low temperatures,...
Not just the quantities but also transit times are of crucial importance for understanding transfer water through a catchment. This information is essential, example, determining risk contaminants from diffuse, agricultural sources toward surface bodies. We created hydrological age-tracking reservoir model meso-scale Mediterranean catchment that prone to flash floods. implemented StorAge Selection (SAS) functions adapt catchment's wetness condition in order represent changing flow processes....
Toxicity of particulate matter (PM) depends on its sources, size and composition. We identified PM10 sources determined their contribution to oxidative potential (OP) as a health proxy for PM exposure in an Alpine valley influenced by cement industry. filter sample chemical analysis equivalent black carbon (eBC) were measured at urban background site from November 2020 2021. Using optimized Positive Matrix Factorization (PMF) model, the source fingerprints contributions determined. The OP...
Abstract. The chemical composition of PM10 and non-overlapping PM2.5 was studied at the summit Mt. Chacaltaya (5380 m a.s.l., lat. −16.346950°, long. −68.128250°) providing a unique long-term record spanning from December 2011 to March 2020. aerosol Global Atmosphere Watch (GAW) site is representative regional background, seasonally affected by biomass burning practices nearby anthropogenic emissions metropolitan area La Paz–El Alto. Concentration levels are clearly influenced seasons with...
A comprehensive chemical characterization of fine particulate matter (PM
Abstract. The Continuous Flow Analysis technique coupled with Cavity Ring Down Spectrometry (CFA-CRDS) provides a method for high-resolution water isotope analysis of ice cores, which is essential paleoclimatic reconstructions local temperatures and regional atmospheric circulation. Compared to the traditional discrete method, CFA-CRDS significantly reduces time. However, effective resolution at isotopic signal can be retrieved from continuous measurements influenced by system-induced...
Powerful volcanic eruptions inject into the stratosphere sulphur and tephra that may be spread globally affect Earth’s climate. Over last 2500 years, Sigl et al. (2015) made a synthesis of polar ice core atmospheric record climate anomalies from dendrochronological records. Aside few historical events, most large with bipolar imprint significant anomaly are tropical latitudes, but their sources unknown.We analysed micron-size crytotephra composition accompanying (stratospheric)...
Temporal Dynamics of Atmospheric Microbial Communities in the Alps: Insights from 11-Years High-Altitude SamplingMarie Labat Saint Vincent1; Patrik Winiger2; Julian Weng2; Stephan C. Schuster3; Christoph Hueglin4; Sophie Darfeuil1; Pauline Bros-Rolere1; Patrick Ginot1; Claudia Mohr2,5; Jean-Luc Jaffrezo1; Imad El-Haddad2; Aurélien Dommergue1; Catherine Larose11: Institut des Géosciences de l’Environnement (IGE) CNRS, UGA, IRD, INRAE, Grenoble INP, 38058, CEDEX,...
Abstract. The first record of dust deposition events on Mt. Elbrus, Caucasus Mountains derived from a snow pit and shallow firn core is presented for the 2009–2012 period. A combination isotopic analysis, SEVIRI red-green-blue composite imagery, MODIS atmospheric optical depth fields using Deep Blue algorithm, air mass trajectories HYSPLIT model analyses meteorological data enabled identification source regions with high temporal (hours) spatial (ca. 20–100 km) resolution. Seventeen were...
Abstract. A 182 m ice core was recovered from a borehole drilled into bedrock on the western plateau of Mt. Elbrus (43°20´53.9'' N, 42°25´36.0'' E; 5115 a.s.l.) in Caucasus, Russia, 2009. This is first region that represents paleoclimate record practically undisturbed by seasonal melting. Relatively high snow accumulation rates at drilling site enabled analysis intraseasonal variability climate proxies. Borehole temperatures ranged −17 °C 10 depth to −2.4 m. detailed radio-echo sounding...