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Karlöf, L.; Winther, J.-G.; Isaksson, E.; Kohler, J.; Pinglot, J.F.; Wilhelms, F.; Hansson, M.; Holmlund, P.; Nyman, M.; Pettersson, R.; Stenberg, M.; Thomassen, M.P.A.; van der Veen, C.; van de Wal, R.S.W. |
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Title  |
A 1500 year record of accumulation at Amundsenisen western Dronning Maud Land, Antarctica, derived from electrical and radioactive measurements on a 120 m ice core |
Type |
Journal Article |
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Year |
1999 |
Publication |
Journal of geophysical research-atmospheres |
Abbreviated Journal |
J. Geophys. Res. |
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Volume |
105 |
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Abstract |
During the Nordic EPICA pre-site survey in Dronning Maud Land in 1997/1998 a 120 m long ice core was retrieved (76°00'S 08°03'W, 2400 m above sea level). The whole core has been measured using the electric conductivity measurement (ECM) and dielectric profiling (DEP) techniques, and the core chronology has been established by detecting major volcanic eruptions. In a nearby shallow core radioactive traces from nuclear tests conducted during the 1950s and 1960s have been identified. Altogether, 13 ECM and DEP peaks in the long core are identified as originating from specific volcanic eruptions. In addition two peaks of increased total ? activity are identified in the short core. Accumulation is calculated as averages over the time periods between these dated events. Accumulation rate is 62 millimetres (w. eq./yr) for the last 181 years (1816 A.D. to present) and 61 mm w. eq./yr for the last 1457 years (540 A.D. to present). Our record shows an 8% decrease in accumulation between 1452 and 1641 A.D. (i.e. part of the Little Ice Age), compared to the long-term mean. |
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265 |
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American Geophysical Union |
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ISSN |
0148-0227 |
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yes |
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Call Number |
IPEV @ Thierry.Lemaire @ |
Serial |
5571 |
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Author |
Angot H, Barret M, Magand O, Ramonet M, Dommergue A, |
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Title |
A 2-year record of atmospheric mercury species at a background Southern Hemisphere station on Amsterdam Island
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Type |
Journal Article |
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Year |
2014 |
Publication |
Atmospheric Chemistry and Physics |
Abbreviated Journal |
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Volume |
14 |
Issue |
20 |
Pages |
11461-11473 |
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Abstract |
Although essential to fully understand the cycling of mercury at the global scale, mercury species records in the Southern Hemisphere are scarce. Under the framework of the Global Mercury Observation System (GMOS) project, a monitoring station has been set up on Amsterdam Island (37°48´ S, 77°34´ E) in the remote southern Indian Ocean. For the first time in the Southern Hemisphere, a 2-year record of gaseous elemental mercury (GEM), reactive gaseous mercury (RGM) and particle-bound mercury (PBM) is presented. GEM concentrations were remarkably steady (1.03 ± 0.08 ng m−3) while RGM and PBM concentrations were very low and exhibited a strong variability (mean: 0.34 pg m−3, range: < detection limit–4.07 pg m−3; and mean: 0.67 pg m−3, range: < detection limit–12.67 pg m−3, respectively). Despite the remoteness of the island, wind sector analysis, air mass back trajectories and the observation of radonic storms highlighted a long-range contribution from the southern African continent to the GEM and PBM budgets from July to September during the biomass burning season. Low concentrations of GEM were associated with southerly polar and marine air masses from the remote southern Indian Ocean. This unique data set provides new baseline GEM concentrations in the Southern Hemisphere midlatitudes while mercury speciation along with upcoming wet deposition data will help to improve our understanding of the mercury cycle in the marine boundary layer. |
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Programme |
416,1028 |
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Thesis |
Bachelor's thesis |
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Publisher |
Copernicus GmbH |
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ISSN |
1680-7316 |
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yes |
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Call Number |
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Serial |
5764 |
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Author |
Zoé Koenig, Christine Provost, Ramiro Ferrari, Nathalie Sennéchael, and Young-Hyang Park |
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Title |
A 20-year long volume transport time series of the Antarctic Circumpolar Current obtained from in situ and satellite observations. Part II : Analysis of the variations |
Type |
Conference - International - Poster |
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Year |
2014 |
Publication |
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Programme |
1061 |
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yes |
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Call Number |
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Serial |
5594 |
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Author |
Motte E., Ricaud P., Gabard B., Niclas M. & Gangneron F. |
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Title |
A 22 GHz Mobile Microwave Radiometer (MobRa) for the study of stratospheric water vapor |
Type |
Journal Article |
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Year |
2008 |
Publication |
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING |
Abbreviated Journal |
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Volume |
46 |
Issue |
10 |
Pages |
3104-3114 |
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Programme |
910 |
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Thesis |
Bachelor's thesis |
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ISSN |
0196-2892 |
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Approved |
yes |
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Call Number |
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Serial |
4924 |
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Author |
Kanakidou, M., P.J. Crutzen, P.H. Zimmermann and B. Bonsang |
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Title |
A 3-dimensional global study of the photochemistry of ethane and propane in the troposphere: Production and transport of organic nitrogen compounds |
Type |
Book Chapter |
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Year |
1992 |
Publication |
Air Pollution Modeling and its Application IX |
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Pages |
415-426 |
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Abstract |
In: “Air Pollution Modeling and its Application IX”, H. van Dop and G. Kallos (Eds.), Plenum Press, New York, 415-426 (1992). |
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146 |
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Approved |
yes |
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Call Number |
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Serial |
153 |
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Author |
King MA, Coleman R, Freemantle AJ, Fricker HA, Hurd RS, Legrésy B, Padman L, Warner R, |
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Title |
A 4-decade record of elevation change of the Amery Ice Shelf, East Antarctica
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Type |
Journal Article |
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Year |
2009 |
Publication |
Journal of Geophysical Research |
Abbreviated Journal |
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Volume |
114 |
Issue |
F1 |
Pages |
F01010- |
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Programme |
1050 |
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Thesis |
Bachelor's thesis |
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Publisher |
American Geophysical Union |
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ISSN |
0148-0227 |
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Approved |
yes |
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Call Number |
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Serial |
2885 |
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Author |
Agosta Cécile, Favier Vincent, Genthon Christophe, Gallée Hubert, Krinner Gerhard, Lenaerts Jan, van den Broeke Michiel, |
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Title |
A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation
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Type |
Journal Article |
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Year |
2012 |
Publication |
Climate Dynamics |
Abbreviated Journal |
0930-7575 |
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Volume |
38 |
Issue |
1 |
Pages |
75-86 |
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Keywords |
Earth and Environmental Science, |
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Abstract |
The GLACIOCLIM-SAMBA (GS) Antarctic accumulation monitoring network, which extends from the coast of Adelie Land to the Antarctic plateau, has been surveyed annually since 2004. The network includes a 156-km stake-line from the coast inland, along which accumulation shows high spatial and interannual variability with a mean value of 362 mm water equivalent a 1 . In this paper, this accumulation is compared with older accumulation reports from between 1971 and 1991. The mean and annual standard deviation and the km-scale spatial pattern of accumulation were seen to be very similar in the older and more recent data. The data did not reveal any significant accumulation trend over the last 40 years. The ECMWF analysis-based forecasts (ERA-40 and ERA-Interim), a stretched-grid global general circulation model (LMDZ4) and three regional circulation models (PMM5, MAR and RACMO2), all with high resolution over Antarctica (27125 km), were tested against the GS reports. They qualitatively reproduced the meso-scale spatial pattern of the annual-mean accumulation except MAR. MAR significantly underestimated mean accumulation, while LMDZ4 and RACMO2 overestimated it. ERA-40 and the regional models that use ERA-40 as lateral boundary condition qualitatively reproduced the chronology of interannual variability but underestimated the magnitude of interannual variations. Two widely used climatologies for Antarctic accumulation agreed well with the mean GS data. The model-based climatology was also able to reproduce the observed spatial pattern. These data thus provide new stringent constraints on models and other large-scale evaluations of the Antarctic accumulation. |
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Programme |
411;1013 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Springer Berlin / Heidelberg |
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ISSN |
0930-7575 |
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Approved |
yes |
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Call Number |
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Serial |
3347 |
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Author |
Vimeux F., Masson V., Delaygue G., Jouzel J., Petit J.R. , Stievenard M., Vaikmae R. & White J.W.C. |
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Title |
A 420,000 year deuterium excess record from East Antarctica : Information on past changes in the origin of precipitation at Vostok. |
Type |
Journal Article |
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Year |
2001 |
Publication |
Journal of geophysical research-atmospheres |
Abbreviated Journal |
J. Geophys. Res. |
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Volume |
106 |
Issue |
d23 |
Pages |
31863-31873 |
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Abstract |
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Programme |
902 |
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ISSN |
0148-0227 |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
2277 |
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Author |
S. Goursaud, V. Masson-Delmotte, V. Favier, S. Preunkert, M. Fily, H. Gallée, B. Jourdain, M. Legrand, O. Magand, B. Minster, M. Werner |
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Title |
A 60-year ice-core record of regional climate from Adélie Land, coastal Antarctica |
Type |
Book Chapter |
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Year |
2017 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
343-362 |
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Keywords |
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Abstract |
A 22.4 m-long shallow firn core was extracted during the 2006/2007 field season from coastal Adélie Land. Annual layer counting based on subannual analyses of δ18O and major chemical components was combined with 5 reference years associated with nuclear tests and non-retreat of summer sea ice to build the initial ice-core chronology (1946–2006), stressing uncertain counting for 8 years. We focus here on the resulting δ18O and accumulation records. With an average value of 21.8 ± 6.9 cm w.e. yr−1, local accumulation shows multi-decadal variations peaking in the 1980s, but no long-term trend. Similar results are obtained for δ18O, also characterised by a remarkably low and variable amplitude of the seasonal cycle. The ice-core records are compared with regional records of temperature, stake area accumulation measurements and variations in sea-ice extent, and outputs from two models nudged to ERA (European Reanalysis) atmospheric reanalyses: the high-resolution atmospheric general circulation model (AGCM), including stable water isotopes ECHAM5-wiso (European Centre Hamburg model), and the regional atmospheric model Modèle Atmosphérique Régional (AR). A significant linear correlation is identified between decadal variations in δ18O and regional temperature. No significant relationship appears with regional sea-ice extent. A weak and significant correlation appears with Dumont d'Urville wind speed, increasing after 1979. The model-data comparison highlights the inadequacy of ECHAM5-wiso simulations prior to 1979, possibly due to the lack of data assimilation to constrain atmospheric reanalyses. Systematic biases are identified in the ECHAM5-wiso simulation, such as an overestimation of the mean accumulation rate and its interannual variability, a strong cold bias and an underestimation of the mean δ18O value and its interannual variability. As a result, relationships between simulated δ18O and temperature are weaker than observed. Such systematic precipitation and temperature biases are not displayed by MAR, suggesting that the model resolution plays a key role along the Antarctic ice sheet coastal topography. Interannual variations in ECHAM5-wiso temperature and precipitation accurately capture signals from meteorological data and stake observations and are used to refine the initial ice-core chronology within 2 years. After this adjustment, remarkable positive (negative) δ18O anomalies are identified in the ice-core record and the ECHAM5-wiso simulation in 1986 and 2002 (1998–1999), respectively. Despite uncertainties associated with post-deposition processes and signal-to-noise issues, in one single coastal ice-core record, we conclude that the S1C1 core can correctly capture major annual anomalies in δ18O as well as multi-decadal variations. These findings highlight the importance of improving the network of coastal high-resolution ice-core records, and stress the skills and limitations of atmospheric models for accumulation and δ18O in coastal Antarctic areas. This is particularly important for the overall East Antarctic ice sheet mass balance. |
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Programme |
411,414,1154 |
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Thesis |
Bachelor's thesis |
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ISSN |
1994-0424 |
ISBN |
1994-0424 |
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Approved |
yes |
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Call Number |
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Serial |
6672 |
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Author |
Sentia Goursaud, Valérie Masson-delmotte, Vincent Favier, Susanne Preunkert, Michel Fily, Hubert Gallée, Bruno Jourdain, Michel Legrand, Olivier Magand, Bénédicte Minster, Martin Werner |
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Title |
A 60-year ice-core record of regional climate from Adélie Land, coastal Antarctica |
Type |
Journal |
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Year |
2017 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
343-362 |
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Keywords |
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Abstract |
Abstract. A 22.4 M-long Shallow Firn Core Was Extracted During The 2006/2007 Field Season From Coastal Adélie Land. Annual Layer Counting Based On Subannual Analyses Of δ18o And Major Chemical Components Was Combined With 5 Reference Years Associated With Nuclear Tests And Non-retreat Of Summer Sea Ice To Build The Initial Ice-core Chronology (1946–2006), Stressing Uncertain Counting For 8 Years. We Focus Here On The Resulting δ18o And Accumulation Records. With An Average Value Of 21.8 ± 6.9 Cm W.e. Yr−1, Local Accumulation Shows Multi-decadal Variations Peaking In The 1980s, But No Long-term Trend. Similar Results Are Obtained For δ18o, Also Characterised By A Remarkably Low And Variable Amplitude Of The Seasonal Cycle. The Ice-core Records Are Compared With Regional Records Of Temperature, Stake Area Accumulation Measurements And Variations In Sea-ice Extent, And Outputs From Two Models Nudged To Era (European Reanalysis) Atmospheric Reanalyses: The High-resolution Atmospheric General Circulation Model (Agcm), Including Stable Water Isotopes Echam5-wiso (European Centre Hamburg Model), And The Regional Atmospheric Model Modèle Atmosphérique Régional (Ar). A Significant Linear Correlation Is Identified Between Decadal Variations In δ18o And Regional Temperature. No Significant Relationship Appears With Regional Sea-ice Extent. A Weak And Significant Correlation Appears With Dumont D'urville Wind Speed, Increasing After 1979. The Model-data Comparison Highlights The Inadequacy Of Echam5-wiso Simulations Prior To 1979, Possibly Due To The Lack Of Data Assimilation To Constrain Atmospheric Reanalyses. Systematic Biases Are Identified In The Echam5-wiso Simulation, Such As An Overestimation Of The Mean Accumulation Rate And Its Interannual Variability, A Strong Cold Bias And An Underestimation Of The Mean δ18o Value And Its Interannual Variability. As A Result, Relationships Between Simulated δ18o And Temperature Are Weaker Than Observed. Such Systematic Precipitation And Temperature Biases Are Not Displayed By Mar, Suggesting That The Model Resolution Plays A Key Role Along The Antarctic Ice Sheet Coastal Topography. Interannual Variations In Echam5-wiso Temperature And Precipitation Accurately Capture Signals From Meteorological Data And Stake Observations And Are Used To Refine The Initial Ice-core Chronology Within 2 Years. After This Adjustment, Remarkable Positive (Negative) δ18o Anomalies Are Identified In The Ice-core Record And The Echam5-wiso Simulation In 1986 And 2002 (1998–1999), Respectively. Despite Uncertainties Associated With Post-deposition Processes And Signal-to-noise Issues, In One Single Coastal Ice-core Record, We Conclude That The S1c1 Core Can Correctly Capture Major Annual Anomalies In δ18o As Well As Multi-decadal Variations. These Findings Highlight The Importance Of Improving The Network Of Coastal High-resolution Ice-core Records, And Stress The Skills And Limitations Of Atmospheric Models For Accumulation And δ18o In Coastal Antarctic Areas. This Is Particularly Important For The Overall East Antarctic Ice Sheet Mass Balance. |
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Programme |
411 |
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ISSN |
1994-0416 |
ISBN |
1994-0416 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7452 |
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