Výsledky vyhledávání - "Simon G. Sheldon"

The investigation and experience of using ESTISOL™ 240 and COASOL™ for ice-core drilling

Autor: Simon G. Sheldon, Steffen B. Hansen, Jørgen Peder Steffensen, Sigfus J Johnsen, Trevor Popp

Publikováno v: Annals of Glaciology. 55:219-232

Continuous good-quality deep ice cores provide excellent scientific data with which to reconstruct a past climate record for >800 ka. At depths starting from ∼100m using an electromechanical drill, a drilling liquid is essential for successful reco

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::82bec19f5339a8ff533e7f70885b3445
https://doi.org/10.3189/2014aog68a036

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Deep ice-core drilling performance and experience at NEEM, Greenland

Autor: Trevor Popp, Steffen B. Hansen, Simon G. Sheldon, Christian Panton

Publikováno v: Annals of Glaciology. 55:53-64

The NEEM deep ice-core drilling in northwest Greenland was completed in summer 2010 after three seasons, which included establishing all drilling infrastructure. Normal drilling operations in the main borehole were declared terminated at 2537.36 m be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a22ed5760935c7d2b3c628b0e3fca803
https://doi.org/10.3189/2014aog68a042

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Promising new borehole liquids for ice-core drilling on the East Antarctic high plateau

Autor: Steffen B. Hansen, Jørgen Peder Steffensen, Simon G. Sheldon, Trevor Popp

Publikováno v: Annals of Glaciology. 55:260-270

A drill liquid is essential for the purpose of recovering good-quality scientifically useful ice cores at intermediate to deep depths, i.e. >∼100 m. The pressure produced by the liquid helps to eliminate the detrimental effects of the abrupt releas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ad1c6eb579739e384a46529968d72be
https://doi.org/10.3189/2014aog68a043

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A new intermediate-depth ice-core drilling system

Autor: Carsten Mortensen, Trevor Popp, Thomas M. Hedegaard, Simon G. Sheldon, Steffen B. Hansen

Publikováno v: Annals of Glaciology. 55:271-284

Several recent projects associated with the IPICS (International Partnerships in Ice Core Sciences) 2k array have demanded the recovery of ice core to depths in excess of several hundred metres (e.g. Flade Isblink, Greenland (2006), Aurora Basin, Ant

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ef8a2d678ef22ef1f01935f62630a724
https://doi.org/10.3189/2014aog68a038

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Drilling into debris-rich basal ice at the bottom of the NEEM (Greenland) borehole

Autor: Steffen B. Hansen, Trevor Popp, Jay A. Johnson, Jakob Schwander, Simon G. Sheldon

Publikováno v: Annals of Glaciology. 55:199-206

After the NEEM (Greenland) deep ice-core drilling was declared terminated with respect to developing stratigraphic climate reconstructions, efforts were turned toward collecting basal ice-sheet debris and, if possible, drilling into the bedrock itsel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::044e0ff5eba6793e2558a79f7f9876e4
https://doi.org/10.3189/2014aog68a029

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Physical analysis of an Antarctic ice core-towards an integration of micro- and macrodynamics of polar ice

Autor: Sepp Kipfstuhl, Thomas Kleiner, Sérgio H. Faria, Ilka Weikusat, Jan Eichler, Simon G. Sheldon, Dorthe Dahl-Jensen, Frank Wilhelms, Daniela Jansen, Heinrich Miller, Tobias Binder

Publikováno v: Weikusat, I, Jansen, D, Binder, T, Eichler, J, Faria, S H, Wilhelms, F, Kipfstuhl, S, Sheldon, S, Miller, H, Dahl-Jensen, D & Kleiner, T 2016, ' Physical analysis of an Antarctic ice core-towards an integration of micro-and macrodynamics of polar ice ', Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 375, no. 2086, 20150347 . https://doi.org/10.1098/rsta.2015.0347
EPIC3Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, The Royal Society Publishing, 375(2086), pp. 20150347, ISSN: 1364-503X
Addi. Archivo Digital para la Docencia y la Investigación
instname
Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
Addi: Archivo Digital para la Docencia y la Investigación
Universidad del País Vasco

Microstructures from deep ice cores reflect the dynamic conditions of the drill location as well as the thermodynamic history of the drill site and catchment area in great detail. Ice core parameters (crystal lattice-preferred orientation (LPO), grai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e79217bfcf4b6f852730723f2d9922ec
https://curis.ku.dk/ws/files/213158438/rsta20150347.pdf

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Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica

Autor: Morgane Philippe, Philippe Claeys, Helle Astrid Kjær, Reinhard Drews, Karen Fjøsne, Bryn Hubbard, Jean-Louis Tison, Simon G. Sheldon, Kevin De Bondt, Jan T. M. Lenaerts, Frank Pattyn

Publikováno v: Philippe, M, Tison, J-L, Fjosne, K, Hubbard, B, Kjær, H A, Lenaerts, J T M, Drews, R, Sheldon, S G, De Bondt, K, Claeys, P & Pattyn, F 2016, ' Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica ', Cryosphere, vol. 10, no. 5, pp. 2501-2516 . https://doi.org/10.5194/tc-10-2501-2016
The Cryosphere, 10
The Cryosphere, Vol 10, Pp 2501-2516 (2016)

Ice cores provide temporal records of surface mass balance (SMB). Coastal areas of Antarctica have relatively high and variable SMB, but are under-represented in records spanning more than 100 years. Here we present SMB reconstruction from a 120m-lon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1813284221cb60423a01d308c8260d7e
https://curis.ku.dk/ws/files/173287557/tc_10_2501_2016.pdf

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The EPICA Dronning Maud Land deep drilling operation

Publikováno v: Annals of Glaciology
Annals of Glaciology, 2014, 55 (68), pp.355-366. ⟨10.3189/2014AoG68A189⟩
Annals of Glaciology, International Glaciological Society, 2014, 55 (68), pp.355-366. ⟨10.3189/2014AoG68A189⟩
EPIC3Annals of Glaciology, International Glaciological Society, 55(68), pp. 355-366, ISSN: 0260-3055
WILHELMS, Frank; MILLER, Heinrich; GERASIMOFF, Michael D.; DRÜCKER, Cord; FRENZEL, Andreas; FRITZSCHE, Diedrich; GROBE, Hannes; HANSEN, Steffen Bo; HILMARSSON, Sverrir Æ.; HOFFMANN, Georg; HÖRNBY, Kerstin; JAESCHKE, Andrea; JAKOBSDÓTTIR, Steinunn S.; JUCKSCHAT, Paul; KARSTEN, Achim; KARSTEN, Lorenz; Kaufmann, Patrik R.; KARLIN, Torbjörn; KOHLBERG, Eberhard; KLEFFEL, Guido; ... (2014). The EPICA Dronning Maud Land deep drilling operation. Annals of glaciology, 55(68), pp. 355-366. International Glaciological Society 10.3189/2014AoG68A189

We report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C withi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::774702ea31eedfb1ae352e2d2e8ec933
https://hal.science/hal-03213402

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Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet

Publikováno v: Atmospheric Chemistry and Physics, 13 (9)
Atmospheric Chemistry and Physics, Vol 13, Iss 9, Pp 4815-4828 (2013)
Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics, 2013, 13 (9), pp.4815-4828. ⟨10.5194/acp-13-4815-2013⟩
Atmospheric Chemistry and Physics, European Geosciences Union, 2013, 13 (9), pp.4815-4828. ⟨10.5194/acp-13-4815-2013⟩

We present here surface water vapor isotopic measurements conducted from June to August 2010 at the NEEM (North Greenland Eemian Drilling Project) camp, NW Greenland (77.45 degrees N, 51.05 degrees W, 2484 m a.s.l.). Measurements were conducted at 9

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe4c11dc33df7737ac34878c3fb54e21
https://hdl.handle.net/20.500.11850/67919

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The Hans Tausen drill: design, performance, further developments and some lessons learned

Autor: Trevor Popp, Sigfus J Johnsen, Pavel Talalay, V. Zagorodnov, Laurent Augustin, Hideaki Motoyama, Dorthe Dahl-Jensen, Simon G. Sheldon, Henry Rufli, Frank Wilhelms, Jørgen Peder Steffensen, Paul Journé, Steffen B. Hansen, Olivier Alemany, Nobuhiko Azuma, Thorsteinn Thorsteinsson, Jakob Schwander

Publikováno v: Annals of Glaciology
Annals of Glaciology, International Glaciological Society, 2007, 47 (17), pp.89 à 98. ⟨10.3189/172756407786857686⟩
EPIC3Annals of Glaciology, 47, pp. 89-98, ISSN: 0260-3055

In the mid-1990s, excellent results from the GRIP and GISP2 deep drilling projects in Greenland opened up funding for continued ice-coring efforts in Antarctica (EPICA) and Greenland (NorthGRIP). The Glaciology Group of the Niels Bohr Institute, Univ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11714a02dad9310f9a7a569c6729ce7e
https://hal-insu.archives-ouvertes.fr/insu-00376327

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