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Sep 23, 2021
Hazards like droughts and heatwaves increase tree mortality, through mechanisms that alter their carbon reserves.  In [1] we adapt the concept of ruin modelling, from the insurance industry, to devise a growth-ruin model for forests, as a response to climate hazards.
Sep 20, 2021
An ancient table zither qin, an emblematic stringed instrument of traditional Chinese music, has been rediscovered in the museum collection of the Conservatoire National des Arts et Métiers (inv.4224, CNAM collection), Paris.
Sep 09, 2021
The description and analysis of compound extremes affecting mid and high latitudes in the winter requires an accurate estimation of snowfall.
Sep 03, 2021
Climate simulations have spatial biases, i.e., spatial properties (e.g., rainfall variability between different sites) can differ from observations. Consequently, corrections of spatial properties are needed, e.g. for impact studies [1].
Sep 03, 2021
Water isotope ratios of ice cores are a key source of information on past temperatures. Through fractionation within the hydrological cycle, temperature is imprinted in the water isotopic composition of snowfalls.
Aug 19, 2021
The rate at which land surface soils dry following rain events is an important feature of terrestrial models. It determines, for example, the water availability for vegetation, the occurrences of droughts, and the surface heat exchanges.
May 17, 2021
Land surface modellers need measurable proxies to constrain the quantity of carbon dioxide (CO2) assimilated by continental plants through photosynthesis, known as gross primary production (GPP).
May 07, 2021
La fonte des calottes polaires du Groenland et de l’Antarctique s’accentue sous l’effet du réchauffement climatique, avec une perte de masse qui a été multipliée par six ces quarante dernières années.
May 03, 2021
Given the ever increasing spatial resolution of climate models and the significant role of lakes on the regional climate, it becomes important to represent water bodies in climate models.
Apr 20, 2021
Obtaining precise continuous measurements of water vapor isotopic composition in dry places (polar or high-altitude regions) is an important challenge.
Apr 01, 2021
The formulation of variable selection has been widely developed in the Bayesian literature by linking a random binary indicator to each variable. This Bayesian inference has the advantage of stochastically exploring the set of possible sub-models, whatever their dimension.
Apr 01, 2021
Current archaeological paradigm proposes that the first peopling of the Americas does not exceed the Last Glacial Maximum period.
Jan 13, 2021
La COVID-19 affecte actuellement la totalité de pays du monde et fait peser de graves menaces sur la santé publique ainsi que sur la stabilité économique et sociale.
Jan 13, 2021
Challenge: How to simulate 100 millennial heatwaves at the cost of 100 simulations?
Nudging a stochastic weather generator based on atmospheric circulation analogs towards high local temperatures [here temperature average between Madrid, Toulouse, Orly, De Bilt and Berlin], to obtain the warmest summers that could be, starting on a June 1st and the armest summers that could be, with a weather patterns that are similar to observations.
Nov 20, 2020
Climate models are the major tools to study the climate system and its evolutions in the future. However, climate simulations often present statistical biases: even for the past climate, the statistical attributes of modeled variables (e.g.
Oct 15, 2020
Séminaire LSCE du 2020/10/15
Lien vers le diaporama Dès lors qu'un avis lui est demandé par un décideur ou un porteur d'enjeux, le scientifique coiffe sa casquette d'expert et sort à la fois de sa zone de compétence propre et de sa zone de confort pour se confronter aux décisions publiques alors que les enjeux et les pressions peuvent être considérables.
Oct 13, 2020
The Surface Water and Ocean Topography (SWOT) space mission will map surface area and water level changes in lakes at the global scale. Such new data are of great interest to better understand and model lake dynamics as well as to improve water management.
Oct 12, 2020
To respect the Paris agreement targeting a limitation of global warming below 2°C by 2100, and possibly below 1.5°C, drastic reductions of greenhouse gas emissions are mandatory but not sufficient. Large‐scale deployment of other climate mitigation strategies is also necessary.
Sep 17, 2019
The Antarctic temperature changes over the past millennia remain more uncertain than in many other continental regions.
Sep 17, 2019
The Antarctic ice sheet mass balance is a major component of the sea level budget and results from the difference of two fluxes of a similar magnitude: ice flow discharging in the ocean and net snow accumulation on the ice sheet surface, i.e. the surface mass balance (SMB).
Sep 10, 2019
Tropospheric ozone (O3) is key component of air pollution and an important anthropogenic greenhouse gas.
Jul 13, 2018
Despite the societal importance of extreme hydroclimate events, few palaeoenvironmental studies of Scandinavian lake sediments have investigated flood occurrences.
Mar 09, 2018
  Climate trends in the Antarctic region remain poorly characterized, owing to the brevity and scarcity of direct climate observations and the large magnitude of interannual to decadal-scale climate variability.
Mar 09, 2018
  Air enclosed in ice cores provides a unique archive for paleo-climate studies.
Mar 08, 2018
As part of its ongoing project on repositories for high-activity, long-lived radioactive waste, a 2000 m deep borehole was drilled by the French Nuclear Waste Agency (ANDRA) in the layered structure of alternating aquifers and aquitards of the Eastern Paris Basin.
Mar 06, 2018
The Rhône is characterised by a heavy concentration of nuclear-based industries including nuclear power stations and nuclear sites housing civilian and military facilities.
Mar 06, 2018
Bottled waters are increasingly popular in Tunisia. Most of them come from groundwaters, thus raising the question of the long-term availability of the mineral groundwater resources.
Mar 05, 2018
Objectives: Stable isotope data provide insight into the reconstruction of ancient human diet. However, cooking may alter the original stable isotope compositions of food due to losses and modifications of biochemical and water components.
Feb 26, 2018
We present a comprehensive account of tritium and 3He in the Mediterranean Sea since the appearance of the tritium generated by the atmospheric nuclear-weapon testing in the 1950s and early 1960s, based on essentially all available observations.
Sep 25, 2017
Abstract: The transformation of snow into ice is a complex phenomenon which is difficult to model. Depending on surface temperature and accumulation rate, it may take several decades to millennia for air to be entrapped in ice. The air is thus always younger than the surrounding ice.
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