Internal melting in Antarctic sea ice: Development of "gap layers"
An internal “gap” layer of deteriorated sea ice is co‐located with a significant microbial biological community in late first year and second year Antarctic sea ice in summer. We modeled gap layer formation using a thermal flux model based on the summer reversal in thermal gradient and the thermal c...
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| Veröffentlicht in: | Geophysical research letters 2008-06, Vol.35 (11), p.np-n/a |
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| container_title | Geophysical research letters |
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| creator | Ackley, S. F. Lewis, M. J. Fritsen, C. H. Xie, Hongjie |
| description | An internal “gap” layer of deteriorated sea ice is co‐located with a significant microbial biological community in late first year and second year Antarctic sea ice in summer. We modeled gap layer formation using a thermal flux model based on the summer reversal in thermal gradient and the thermal conductivity found in the upper ice column. The conductive model gives internal sea ice melt rates (gap layer formation rates) between 0.1 to 0.75cm/day. The cumulative melted layer thicknesses during summer computed from these rates agree with field observations. Since the processes for forming these structures act in the vertical direction only and over a significant range of expected conditions, they are commonly formed in the Antarctic sea ice zone during summer, supporting a significant contribution of gap layers to the ice mass balance and productivity on a circumpolar basis. |
| doi_str_mv | 10.1029/2008GL033644 |
| format | Article |
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| identifier | ISSN: 0094-8276 |
| ispartof | Geophysical research letters, 2008-06, Vol.35 (11), p.np-n/a |
| issn | 0094-8276 1944-8007 |
| language | eng |
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| source | Wiley Online Library Journals; Wiley Free Archive; Wiley-Blackwell AGU Digital Archive; EZB Electronic Journals Library |
| subjects | Antarctica Communities Deterioration Earth sciences Earth, ocean, space Exact sciences and technology Heat transfer Marine Melting Melts Sea ice Summer |
| title | Internal melting in Antarctic sea ice: Development of "gap layers" |
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