dorsal/arxiv
View SchemaDynamics of Crystal Formation in the Greenland NorthGRIP Ice Core
| Authors | Joachim Mathiesen, Jesper Ferkinghoff-Borg, Mogens H. Jensen, Mogens Levinsen, Poul Olesen, Dorthe Dahl-Jensen, Anders Svensson |
|---|---|
| Categories | |
| ArXiv ID | physics/0310087 |
| URL | https://arxiv.org/abs/physics/0310087 |
| DOI | 10.3189/172756504781829873 |
| Journal | J. Glaciology 50, 325 (2004) |
Abstract
The North Greenland Ice Core Project (NorthGRIP) provides paleoclimatic information back to at about 120 kyr before present (Dahl-Jensen and others, 2002). Each year, precipitation on the ice sheet covers it with a new layer of snow, which gradually transforms into ice crystals as the layer sinks into the ice sheet. The size distribution of ice crystals has been measured at selected depths in the upper 880 m of the NorthGRIP ice core (Svensson and others, 2003b), which covers a time span of 5300 years. The distributions change with time toward a universal curve, indicating a common underlying physical process in the formation of crystals. We identify this process as an interplay between fragmentation of the crystals and diffusion of their grain boundaries. The process is described by a two-parameter differential equation to which we obtain the exact solution. The solution is in excellent agreement with the experimentally observed distributions.
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"abstract": "The North Greenland Ice Core Project (NorthGRIP) provides paleoclimatic\ninformation back to at about 120 kyr before present (Dahl-Jensen and others,\n2002). Each year, precipitation on the ice sheet covers it with a new layer of\nsnow, which gradually transforms into ice crystals as the layer sinks into the\nice sheet. The size distribution of ice crystals has been measured at selected\ndepths in the upper 880 m of the NorthGRIP ice core (Svensson and others,\n2003b), which covers a time span of 5300 years. The distributions change with\ntime toward a universal curve, indicating a common underlying physical process\nin the formation of crystals. We identify this process as an interplay between\nfragmentation of the crystals and diffusion of their grain boundaries. The\nprocess is described by a two-parameter differential equation to which we\nobtain the exact solution. The solution is in excellent agreement with the\nexperimentally observed distributions.",
"arxiv_id": "physics/0310087",
"authors": [
"Joachim Mathiesen",
"Jesper Ferkinghoff-Borg",
"Mogens H. Jensen",
"Mogens Levinsen",
"Poul Olesen",
"Dorthe Dahl-Jensen",
"Anders Svensson"
],
"categories": [
"physics.geo-ph"
],
"doi": "10.3189/172756504781829873",
"journal_ref": "J. Glaciology 50, 325 (2004)",
"title": "Dynamics of Crystal Formation in the Greenland NorthGRIP Ice Core",
"url": "https://arxiv.org/abs/physics/0310087"
},
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