Personne

Jérôme Chappellaz

Publications associées (140)

An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120-800 ka

An accurate and coherent chronological framework is essential for the interpretation of climatic and environmental records obtained from deep polar ice cores. Until now, one common ice core age scale had been developed based on an inverse dating method (Da ...

Copernicus GmbH2013

Can the carbon isotopic composition of methane be reconstructed from multi-site firn air measurements?

Jérôme Chappellaz

Earth system models (ESMs) are increasing in complexity by incorporating more processes than their predecessors, making them potentially important tools for studying the evolution of climate and associated biogeochemical cycles. However, their coupled beha ...

Copernicus GmbH2013

Continuous methane measurements from a late Holocene Greenland ice core: Atmospheric and in-situ signals

Jérôme Chappellaz

The stable carbon isotopic signature of carbon dioxide (δ13CO2) measured in the air occlusions of polar ice provides important constraints on the carbon cycle in past climates. In order to exploit this information for previous glacial periods, one must use ...

Elsevier BV2013

Eemian interglacial reconstructed from a Greenland folded ice core

Jérôme Chappellaz

The analysis of air bubbles trapped in polar ice has permitted the reconstruction of past atmospheric concentrations of CO2 over various timescales, and revealed that large climate changes over tens of thousands of years are generally accompanied by change ...

Springer Science and Business Media LLC2013

Evaluation of biospheric components in earth system models using modern and palaeo-observations: The state-of-the-art

Jérôme Chappellaz

We investigate for the first time the loss and alteration of past atmospheric information from air trapping mechanisms under low-accumulation conditions through continuous CH4 (and CO) measurements. Methane concentration changes were measured over the Dans ...

Copernicus GmbH2013

Glacial-interglacial dynamics of Antarctic firn columns: Comparison between simulations and ice core air-δ15N measurements

Jérôme Chappellaz

Correct estimation of the firn lock-in depth is essential for correctly linking gas and ice chronologies in ice core studies. Here, two approaches to constrain the firn depth evolution in Antarctica are presented over the last deglaciation: outputs of a fi ...

Copernicus GmbH2013

High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core

Jérôme Chappellaz, Daniele Romanini

The Greenland NEEM (North Greenland Eemian Ice Drilling) operation in 2010 provided the first opportunity to combine trace-gas measurements by laser spectroscopic instruments and continuous-flow analysis along a freshly drilled ice core in a field-based se ...

Copernicus GmbH2013

Methane Studies

Jérôme Chappellaz

This article presents a state-of-the-art of atmospheric methane reconstruction based on ice-core studies. Starting with a biogeochemical overview of the methane cycle, it explains the processes of gas diffusion in firn and trapping in ice. It presents and ...

Elsevier2013

The Antarctic ice core chronology (AICC2012): An optimized multi-parameter and multi-site dating approach for the last 120 thousand years

Jérôme Chappellaz

The deep polar ice cores provide reference records commonly employed in global correlation of past climate events. However, temporal divergences reaching up to several thousand years (ka) exist between ice cores over the last climatic cycle. In this contex ...

Copernicus GmbH2013

The response of atmospheric nitrous oxide to climate variations during the last glacial period

Jérôme Chappellaz

Two deep ice cores from central Greenland, drilled in the 1990s, have played a key role in climate reconstructions of the Northern Hemisphere, but the oldest sections of the cores were disturbed in chronology owing to ice folding near the bedrock. Here we ...

Springer Science and Business Media LLC2013

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