Ice Growth on Post Pond, 1973-1982
Measurements and analysis of seasonal ice growth and decay on Post Pond, New Hampshire, for the period 1973-1982 are presented. Observations included ice thickness measurements, examination of the various ice types contributing to the ice cover, and measurements of meteorological parameters for corr...
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ftdtic:ADA126334 2023-05-15T16:37:13+02:00 Ice Growth on Post Pond, 1973-1982 Gow, Anthony J Govoni, John W COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1983-02 text/html http://www.dtic.mil/docs/citations/ADA126334 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA126334 en eng http://www.dtic.mil/docs/citations/ADA126334 Approved for public release; distribution is unlimited. DTIC AND NTIS Hydrology Limnology and Potamology Snow Ice and Permafrost *ICE DECAY GROWTH(GENERAL) ICE FORMATION MELTING METEOROLOGICAL DATA NEW HAMPSHIRE PONDS SEASONAL VARIATIONS THICKNESS *LAKE ICE PE61102A WU001 Text 1983 ftdtic 2016-02-24T08:04:07Z Measurements and analysis of seasonal ice growth and decay on Post Pond, New Hampshire, for the period 1973-1982 are presented. Observations included ice thickness measurements, examination of the various ice types contributing to the ice cover, and measurements of meteorological parameters for correlation with and modeling of the ice growth process. The overall nature of ice growth and decay (ice loss) on the Post Pond has been ascertained, the seasonal variability in the timing of freeze-up and ice-out and the duration of the ice cover have been determined, and the relationship of ice growth to freezing-degree-day (deg C) records evaluated on the basis of a Stefan conduction equation modified to deal with ice sheets covered with or free of snow. Ice growth occurs predominantly by the direct freezing of lake water, but snow ice may compose as much as 50% of the ice cover in winters with higher than average snowfall. Freeze-up leading to the establishment of a stable ice cover occurs during the 4-week period from the end of November to the end of December. Maximum seasonal ice thicknesses were from 45 to 67 cm and are generally attained during the first two weeks of March; ice-out, marking the final disappearance of ice from Post Pond, usually occurs by the third week of April. The overall rate of the ice loss is three to four times that of ice growth, and is dominated initially by melting from the top. As much as 50% of the ice may be lost in this way before the onset of any bottom melting. Final dissipation of the ice cover is usually expedited by candling resulting from preferential melting and disintegration of the ice at crystal boundaries. Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Hydrology Limnology and Potamology Snow Ice and Permafrost *ICE DECAY GROWTH(GENERAL) ICE FORMATION MELTING METEOROLOGICAL DATA NEW HAMPSHIRE PONDS SEASONAL VARIATIONS THICKNESS *LAKE ICE PE61102A WU001 |
spellingShingle |
Hydrology Limnology and Potamology Snow Ice and Permafrost *ICE DECAY GROWTH(GENERAL) ICE FORMATION MELTING METEOROLOGICAL DATA NEW HAMPSHIRE PONDS SEASONAL VARIATIONS THICKNESS *LAKE ICE PE61102A WU001 Gow, Anthony J Govoni, John W Ice Growth on Post Pond, 1973-1982 |
topic_facet |
Hydrology Limnology and Potamology Snow Ice and Permafrost *ICE DECAY GROWTH(GENERAL) ICE FORMATION MELTING METEOROLOGICAL DATA NEW HAMPSHIRE PONDS SEASONAL VARIATIONS THICKNESS *LAKE ICE PE61102A WU001 |
description |
Measurements and analysis of seasonal ice growth and decay on Post Pond, New Hampshire, for the period 1973-1982 are presented. Observations included ice thickness measurements, examination of the various ice types contributing to the ice cover, and measurements of meteorological parameters for correlation with and modeling of the ice growth process. The overall nature of ice growth and decay (ice loss) on the Post Pond has been ascertained, the seasonal variability in the timing of freeze-up and ice-out and the duration of the ice cover have been determined, and the relationship of ice growth to freezing-degree-day (deg C) records evaluated on the basis of a Stefan conduction equation modified to deal with ice sheets covered with or free of snow. Ice growth occurs predominantly by the direct freezing of lake water, but snow ice may compose as much as 50% of the ice cover in winters with higher than average snowfall. Freeze-up leading to the establishment of a stable ice cover occurs during the 4-week period from the end of November to the end of December. Maximum seasonal ice thicknesses were from 45 to 67 cm and are generally attained during the first two weeks of March; ice-out, marking the final disappearance of ice from Post Pond, usually occurs by the third week of April. The overall rate of the ice loss is three to four times that of ice growth, and is dominated initially by melting from the top. As much as 50% of the ice may be lost in this way before the onset of any bottom melting. Final dissipation of the ice cover is usually expedited by candling resulting from preferential melting and disintegration of the ice at crystal boundaries. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Gow, Anthony J Govoni, John W |
author_facet |
Gow, Anthony J Govoni, John W |
author_sort |
Gow, Anthony J |
title |
Ice Growth on Post Pond, 1973-1982 |
title_short |
Ice Growth on Post Pond, 1973-1982 |
title_full |
Ice Growth on Post Pond, 1973-1982 |
title_fullStr |
Ice Growth on Post Pond, 1973-1982 |
title_full_unstemmed |
Ice Growth on Post Pond, 1973-1982 |
title_sort |
ice growth on post pond, 1973-1982 |
publishDate |
1983 |
url |
http://www.dtic.mil/docs/citations/ADA126334 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA126334 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA126334 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766027520328597504 |