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Jérôme Chappellaz

Related publications (140)

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The SUBGLACIOR drilling probe: Hydraulic considerations

Jérôme Chappellaz

Trends of carbon monoxide (CO) for the past 100 years are reported as derived from Antarctic firn drilling expeditions. Only one of 3 campaigns provided high quality results. The trend was reconstructed using a firn air model in the forward mode to constra ...

Copernicus GmbH2020

Methane (CH4) in marine sediments has the potential to contribute to changes in the ocean and climate system. Physical and biochemical processes that are difficult to quantify with current standard methods such as acoustic surveys and discrete sampling gov ...

Copernicus GmbH2019

Isotopic constraint on the twentieth-century increase in tropospheric ozone

Jérôme Chappellaz

Greenhouse gas measurements along polar ice cores provide important insight into the former composition of the atmosphere, its natural variations, and the responses to fast climatic changes in the past. We present high-resolution nitrous oxide (N2O) and me ...

American Geophysical Union (AGU)2019

Simultaneous detection of C2H6, CH4, and δ13C-CH4 using optical feedback cavity-enhanced absorption spectroscopy in the mid-infrared region: Towards application for dissolved gas measurements

Jérôme Chappellaz, Daniele Romanini

We present high-resolution measurements of carbon monoxide (CO) concentrations from a shallow ice core of the North Greenland Eemian Ice Drilling project (NEEM-2011-S1). An optical-feedback cavity-enhanced absorption spectrometer (OF-CEAS) coupled to a con ...

Copernicus GmbH2019

The causes of the ∼80 ppmv increase of atmospheric carbon dioxide (CO2) during the last glacial.interglacial climatic transition remain debated. We analyzed the parallel evolution of CO2 and its stable carbon isotopic ratio (δ13CO2) in the European Project ...

American Geophysical Union (AGU)2018

Analytical constraints on layered gas trapping and smoothing of atmospheric variability in ice under low-accumulation conditions

Jérôme Chappellaz

Carbon monoxide (CO) is a regulated pollutant and one of the key components determining the oxidizing capacity of the atmosphere. Obtaining a reliable record of atmospheric CO mixing ratios ([CO]) since preindustrial times is necessary to evaluate climate- ...

Copernicus GmbH2017

Is there 1.5-million-year-old ice near Dome C, Antarctica?

Jérôme Chappellaz

Ice sheets provide exceptional archives of past changes in polar climate, regional environment and global atmospheric composition. The oldest dated deep ice core drilled in Antarctica has been retrieved at EPICA Dome C (EDC), reaching ∼ 800 000 years. Obta ...

Copernicus GmbH2017

Comparative carbon cycle dynamics of the present and last interglacial

Jérôme Chappellaz, Daniele Romanini

Simultaneous measurement of C2H6 and CH4 concentrations, and of the δ13C-CH4 isotope ratio is demonstrated using a cavity-enhanced absorption spectroscopy technique in the mid-IR region. The spectrometer is compact and has been designed for field operation ...

Copernicus GmbH2016

Deglaciations are characterized by the largest natural changes in methane (CH4) and nitrous oxide (N2O) concentrations of the past 800g€¯000 years. Reconstructions of millennial- to centennial-scale variability within these periods are mostly restricted to ...

Copernicus GmbH2016

The disturbed stratigraphy of the ice in the lowest 10% of the Greenland GRIP ice core prevents direct access to climatic information older than 110 kyr. This is especially regretful since this period covers the previous interglacial corresponding to marin ...

American Geophysical Union (AGU)2016