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Dive into the research topics where Charlotte Lang is active.

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Featured researches published by Charlotte Lang.


Climate Dynamics | 2013

Current and future atmospheric circulation at 500 hPa over Greenland simulated by the CMIP3 and CMIP5 global models

Alexandre Belleflamme; Xavier Fettweis; Charlotte Lang; Michel Erpicum

The Greenland ice sheet is projected to be strongly affected by global warming. These projections are either issued from downscaling methods (such as Regional Climate Models) or they come directly from General Circulation Models (GCMs). In this context, it is necessary to evaluate the accuracy of the daily atmospheric circulation simulated by the GCMs, since it is used as forcing for downscaling methods. Thus, we use an automatic circulation type classification based on two indices (Euclidean distance and Spearman rank correlation using the daily 500 hPa geopotential height) to evaluate the ability of the GCMs from both CMIP3 and CMIP5 databases to simulate the main circulation types over Greenland during summer. For each circulation type, the GCMs are compared to three reanalysis datasets on the basis of their frequency and persistence differences. For the current climate (1961–1990), we show that most of the GCMs do not reproduce the expected frequency and the persistence of the circulation types and that they simulate poorly the observed daily variability of the general circulation. Only a few GCMs can be used as reliable forcings for downscaling methods over Greenland. Finally, when applying the same approach to the future projections of the GCMs, no significant change in the atmospheric circulation over Greenland is detected, besides a generalised increase of the geopotential height due to a uniform warming of the atmosphere.


The Cryosphere | 2012

Brief communication "Important role of the mid-tropospheric atmospheric circulation in the recent surface melt increase over the Greenland ice sheet"

Xavier Fettweis; Edward Hanna; Charlotte Lang; Alexandre Belleflamme; Michel Erpicum; Hubert Gallée


The Cryosphere | 2016

Reconstructions of the 1900–2015 Greenland ice sheet surface mass balance using the regional climate MAR model

Xavier Fettweis; Jason E. Box; Cécile Agosta; Charles Amory; Christoph Kittel; Charlotte Lang; Dirk van As; Horst Machguth; Hubert Gallée


The Cryosphere | 2012

Impact of spatial resolution on the modelling of the Greenland ice sheet surface mass balance between 1990–2010, using the regional climate model MAR

Bruno Franco; Xavier Fettweis; Charlotte Lang; Michel Erpicum


The Cryosphere | 2014

Stable climate and surface mass balance in Svalbard over 1979–2013 despite the Arctic warming

Charlotte Lang; Xavier Fettweis; Michel Erpicum


The Cryosphere | 2015

Future climate and surface mass balance of Svalbard glaciers in an RCP8.5 climate scenario: a study with the regional climate model MAR forced by MIROC5

Charlotte Lang; Xavier Fettweis; Michel Erpicum


The Cryosphere | 2017

Application of a two-step approach for mapping ice thickness to various glacier types on Svalbard

Johannes Jakob Fürst; Fabien Gillet-Chaulet; Toby Benham; Julian A. Dowdeswell; Mariusz Grabiec; Francisco Navarro; Rickard Pettersson; Geir Moholdt; Christopher Nuth; Björn Sass; Kjetil Schanke Aas; Xavier Fettweis; Charlotte Lang; Thorsten Seehaus; Matthias Braun


Archive | 2018

Interest of a Regional Climate Model for doing future projections over the Greenland Ice Shee

Xavier Fettweis; Alison Delhasse; Cécile Agosta; Charles Amory; Charlotte Lang


Geophysical Research Letters | 2018

The ice-free topography of Svalbard

Johannes Jakob Fürst; Francisco Navarro; Fabien Gillet-Chaulet; Matthias Huss; Geir Moholdt; Xavier Fettweis; Charlotte Lang; Thorsten Seehaus; Songtao Ai; Toby Benham; Doug Benn; Helgi Björnsson; Julian A. Dowdeswell; Mariusz Grabiec; Jack Kohler; Ivan Lavrentiev; Katrin Lindbäck; Kjetil Melvold; Rickard Pettersson; David M. Rippin; Albane Saintenoy; Pablo Sánchez-Gámez; Thomas Vikhamar Schuler; Heïdi Sevestre; Evgeny Vasilenko; Matthias Braun


Archive | 2016

Very high resolution surface mass balance over Greenland modeled by the regional climate model MAR with a downscaling technique

Christoph Kittel; Charlotte Lang; Cécile Agosta; Maxime Prignon; Xavier Fettweis; Michel Erpicum

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Julian A. Dowdeswell

Scott Polar Research Institute

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Toby Benham

Scott Polar Research Institute

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