Publication

The atmospheric CH4 increase since the Last Glacial Maximum: (1). Source estimates

Publications associées (216)

Spatially-resolved mean flow and turbulence help explain observed erosion and deposition patterns of snow over Antarctic sea ice

Michael Lehning, Marc Parlange, Katherine Colby Leonard, Charles Vivant Ignacio Meneveau, Ernesto Trujillo Gomez, Marco Giovanni Giometto

Sea ice-atmosphere interactions are major drivers of patterns of sea ice flows and deformations in Polar regions, and affect snow erosion and deposition at the surface. Here, we combine analyses of sea ice surface topography at very high-resolutions (~1-10 ...

2014

Assessing Seasonal Backscatter Variations with Respect to Uncertainties in Soil Moisture Retrieval in Siberian Tundra Regions

Isabelle Amandine Gouttevin

Knowledge of surface hydrology is essential for many applications, including studies that aim to understand permafrost response to changing climate and the associated feedback mechanisms. Advanced remote sensing techniques make it possible to retrieve a ra ...

Mdpi Ag2014

A 60 yr record of atmospheric carbon monoxide reconstructed from Greenland firn air

Jérôme Chappellaz

During the last glacial cycle, Greenland temperature showed many rapid temperature variations, the so-called Dansgaard-Oeschger (DO) events. The past atmospheric methane concentration closely followed these temperature variations, which implies that the wa ...

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

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

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

Two-phase change in CO 2, Antarctic temperature and global climate during Termination II

Jérôme Chappellaz

Methane measurements along the Vostok ice core reveal substantial changes over the past 160,000 years which are associated with climate fluctuations. These results point to changes in sources of methane and also show that methane has probably contributed, ...

Springer Science and Business Media LLC2013

South Pole glacial climate reconstruction from multi-borehole laser particulate stratigraphy

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

The IceCube Neutrino Observatory and its prototype, AMANDA, were built in South Pole ice, using powerful hot-water drills to cleanly bore >100 holes to depths up to 2500 m. The construction of these particle physics detectors provided a unique opportunity ...

Int Glaciol Soc2013

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

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

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