Strong-wind events and their influence on the formation of snow dunes: observations from Kohnen station, Dronning Maud Land, Antarctica

被引：29

作者：

Birnbaum, Gerit ^{[1
]}

Freitag, Johannes ^{[1
]}

Brauner, Ralf ^{[2
]}

Koenig-Langlo, Gert ^{[1
]}

Schulz, Elisabeth ^{[3
]}

Kipfstuhl, Sepp ^{[1
]}

Oerter, Hans ^{[1
]}

Reijmer, Catharina H. ^{[4
]}

Schlosser, Elisabeth ^{[5
]}

Faria, Sergio H. ^{[6
]}

Ries, Hinnerk ^{[7
]}

Loose, Bernd ^{[1
]}

Herber, Andreas ^{[1
]}

Duda, Michael G. ^{[8
]}

Powers, Jordan G. ^{[8
]}

Manning, Kevin W. ^{[8
]}

van den Broeke, Michiel R. ^{[4
]}

机构：

[1] Alfred Wegener Inst Polar & Marine Res, D-27515 Bremerhaven, Germany

[2] Univ Appl Sci Wilhelmshaven Oldenburg Elsfleth, D-26931 Elsfleth, Germany

[3] Leibniz Inst Balt Sea Res Warnemunde, Dept Phys Oceanog & Instrumentat, D-18119 Rostock, Germany

[4] Univ Utrecht, Inst Marine & Atmospher Res Utrecht IMAU, NL-3508 TA Utrecht, Netherlands

[5] Univ Innsbruck, Inst Meteorol & Geophys, A-6020 Innsbruck, Austria

[6] Univ Gottingen, Dept Crystallog, Ctr Geosci, D-37077 Gottingen, Germany

[7] Univ Hamburg, Inst Meteorol, D-20146 Hamburg, Germany

[8] Natl Ctr Atmospher Res, Earth Syst Lab, Mesoscale & Microscale Meteorol Div, Boulder, CO 80307 USA

来源：

JOURNAL OF GLACIOLOGY | 2010年 / 56卷 / 199期

关键词：

MESOSCALE-PREDICTION-SYSTEM; VOSTOK ICE CORE; SOUTHERN-HEMISPHERE; PLATEAU; CLIMATE; SURFACE; ACCUMULATION; FIRN; VARIABILITY; REANALYSIS;

D O I：

10.3189/002214310794457272

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Analyses of shallow cores obtained at the European Project for Ice Coring in Antarctica (EPICA) drilling site Kohnen station (75 degrees 00' S, 00 degrees 04' E; 2892 m a.s.l.) on the plateau of Dronning Maud Land reveal the presence of conserved snow dunes in the firn. In situ observations during three dune formation events in the 2005/06 austral summer at Kohnen station show that these periods were characterized by a phase of 2 or 3 days with snowdrift prior to dune formation which only occurred during high wind speeds of >10 m s(-1) at 2 m height caused by the influence of a low-pressure system. The dune surface coverage after a formation event varied between 5% and 15%, with a typical dune size of (4 +/- 2) m x (8 +/- 3) m, a maximum height of 0.2 +/- 0.1 m and a periodicity length of about 30 m. The mean density within a snow dune varied between 380 and 500 kg m(-3), whereas the mean density at the surrounding surface was 330 +/- 5 kg m(-3). The firn cores covering a time-span of 22 +/- 2 years reveal that approximately three to eight events per year occurred, during which snow dunes had been formed and were preserved in the urn.

引用

页码：891 / 902

页数：12

共 41 条

[1] Selection of dune shapes and velocities - Part 1: Dynamics of sand, wind and barchans [J].

Andreotti, B ;

Claudin, P ;

Douady, S .

EUROPEAN PHYSICAL JOURNAL B, 2002, 28 (03) :321-339

[2]

Bagnold R., 1941, PHYS BLOWN SAND DESE

[3] One-to-one coupling of glacial climate variability in Greenland and Antarctica [J].

Barbante, C. ;

Barnola, J. -M. ;

Becagli, S. ;

Beer, J. ;

Bigler, M. ;

Boutron, C. ;

Blunier, T. ;

Castellano, E. ;

Cattani, O. ;

Chappellaz, J. ;

Dahl-Jensen, D. ;

Debret, M. ;

Delmonte, B. ;

Dick, D. ;

Falourd, S. ;

Faria, S. ;

Federer, U. ;

Fischer, H. ;

Freitag, J. ;

Frenzel, A. ;

Fritzsche, D. ;

Fundel, F. ;

Gabrielli, P. ;

Gaspari, V. ;

Gersonde, R. ;

Graf, W. ;

Grigoriev, D. ;

Hamann, I. ;

Hansson, M. ;

Hoffmann, G. ;

Hutterli, M. A. ;

Huybrechts, P. ;

Isaksson, E. ;

Johnsen, S. ;

Jouzel, J. ;

Kaczmarska, M. ;

Karlin, T. ;

Kaufmann, P. ;

Kipfstuhl, S. ;

Kohno, M. ;

Lambert, F. ;

Lambrecht, Anja ;

Lambrecht, Astrid ;

Landais, A. ;

Lawer, G. ;

Leuenberger, M. ;

Littot, G. ;

Loulergue, L. ;

Luethi, D. ;

Maggi, V. .

NATURE, 2006, 444 (7116) :195-198

[4] VOSTOK ICE CORE PROVIDES 160,000-YEAR RECORD OF ATMOSPHERIC CO2 [J].

BARNOLA, JM ;

RAYNAUD, D ;

KOROTKEVICH, YS ;

LORIUS, C .

NATURE, 1987, 329 (6138) :408-414

[5] Synoptic situations causing high precipitation rates on the Antarctic plateau: observations from Kohnen Station, Dronning Maud Land [J].

Birnbaum, Gerit ;

Brauner, Ralf ;

Ries, Hinnerk .

ANTARCTIC SCIENCE, 2006, 18 (02) :279-288

[6] Varieties of barchan form in the Namib Desert and on Mars [J].

Bourke, Mary C. ;

Goudie, Andrew S. .

AEOLIAN RESEARCH, 2009, 1 (1-2) :45-54

[7] Direct measurements of episodic snow accumulation on the Antarctic polar plateau [J].

Braaten, DA .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2000, 105 (D8) :10119-10128

[8] Real-time forecasting for the Antarctic: An evaluation of the Antarctic Mesoscale Prediction System (AMPS) [J].

Bromwich, DH ;

Monaghan, AJ ;

Manning, KW ;

Powers, JG .

MONTHLY WEATHER REVIEW, 2005, 133 (03) :579-603

[9] SATELLITE CLIMATOLOGY OF POLAR LOWS AND BROADSCALE CLIMATIC ASSOCIATIONS FOR THE SOUTHERN-HEMISPHERE [J].

CARLETON, AM ;

CARPENTER, DA .

INTERNATIONAL JOURNAL OF CLIMATOLOGY, 1990, 10 (03) :219-246

[10] Snow megadune fields on the East Antarctic Plateau: extreme atmosphere-ice interaction [J].

Fahnestock, MA ;

Scambos, TA ;

Shuman, CA ;

Arthern, RJ ;

Winebrenner, DP ;

Kwok, R .

GEOPHYSICAL RESEARCH LETTERS, 2000, 27 (22) :3719-3722

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