Publications associées à Amplification polaire

On the gas-ice depth difference (Δdepth) along the EPICA Dome C ice core

We compare a variety of methods for estimating the gas/ice depth offset (Δdepth) at EPICA Dome C (EDC, East Antarctica). (1) Purely based on modelling efforts, Δdepth can be estimated combining a firn densification with an ice flow model. (2) The diffusive ...

Copernicus GmbH2012

Orbital forcing and the role of the Latitudinal Temperature/Isolation Gradient

Basil Andrew Stansfield Davis

Orbital forcing of the climate system is clearly shown in the Earths record of glacial–interglacial cycles, but the mechanism underlying this forcing is poorly understood. Traditional Milankovitch theory suggests that these cycles are driven by changes in ...

Springer-Verlag2009

Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years

Jérôme Chappellaz

Gases trapped in polar ice provide our most direct record of the changes in greenhouse gas levels during the past 150,000 years. The best documented trace-gas records are for CO2 and CH4. The measurements corresponding to the industrial period document the ...

American Association for the Advancement of Science (AAAS)2008

Eutrophication of ancient Lake Ohrid: Global warming amplifies detrimental effects of increased nutrient inputs

Alfred Johny Wüest, Beat Mueller, Martin Schmid

Lake Ohrid in southeastern Europe is one of the few ancient, long-lived lakes of the world, and contains more than 200 endemic species. On the basis of integrated monitoring of internal and external nutrient fluxes, a progressing eutrophication was detecte ...

Amer Soc Limnology Oceanography2007

Modeling past atmospheric CO2: Results of a challenge

Jérôme Chappellaz

The deuterium excess of polar ice cores documents past changes in evaporation conditions and moisture origin. New data obtained from the European Project for Ice Coring in Antarctica Dome C East Antarctic ice core provide new insights on the sequence of ev ...

Proceedings of the National Academy of Sciences2005

Dynamical properties of vortical structures on the beta-plane

Jan Sickmann Hesthaven

The long-time evolution of monopolar and dipolar vortices influenced by the large-scale gradient of the ambient potential vorticity (the beta-effect) is studied by direct numerical solutions of the equivalent barotropic quasi-geostrophic equation. Translat ...

Cambridge University Press1994

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

Jérôme Chappellaz

The Vostok core provides the longest ice record of past climatic and environmental conditions, extending back to the interglacial Marine Isotope Stage (MIS) 11, around 400 kyr ago. The MIS 11 information obtained from different time series at Vostok, namel ...

American Geophysical Union1993

Generation of tripolar vortical structures on the beta plane

Jan Sickmann Hesthaven

A new feature of the long-time evolution of a strong vortex with initially monotonic potential vorticity is found by direct numerical solution of the quasigeostrophic equivalent barotropic equation. Two satellites, which emerge after splitting of an annulu ...

AMER INST PHYSICS1993

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Amplification polaire

A synthetic review of feedbacks and drivers of shrub encroachment in arid grasslands

On the gas-ice depth difference (Δdepth) along the EPICA Dome C ice core

Orbital forcing and the role of the Latitudinal Temperature/Isolation Gradient

Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years

Eutrophication of ancient Lake Ohrid: Global warming amplifies detrimental effects of increased nutrient inputs

Modeling past atmospheric CO2: Results of a challenge

Dynamical properties of vortical structures on the beta-plane

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

Generation of tripolar vortical structures on the beta plane

Graph Chatbot

Chattez avec Graph Search

Generation of tripolar vortical structures on the beta plane

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

Dynamical properties of vortical structures on the beta-plane

Eutrophication of ancient Lake Ohrid: Global warming amplifies detrimental effects of increased nutrient inputs

Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years

Orbital forcing and the role of the Latitudinal Temperature/Isolation Gradient

On the gas-ice depth difference (Δdepth) along the EPICA Dome C ice core

A synthetic review of feedbacks and drivers of shrub encroachment in arid grasslands

Modeling past atmospheric CO2: Results of a challenge