The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice
During the spring-to-summer transition, the snow cover on Arctic sea ice melts and meltwater pools on the surface to form melt ponds; however, the timing and extent of the ponding varies between years. In Dease Strait (Nunavut), this transition was particularly dramatic in 2014 when on 18 June meltw...
Format: | Dataset |
---|---|
Language: | unknown |
Published: |
2023
|
Subjects: | |
Online Access: | https://search.dataone.org/view/sha256:cf1de63ecd3f7e820a2ccb6993b4c29f29da7d09201cc99aecce8d86c223270c |
id |
dataone:sha256:cf1de63ecd3f7e820a2ccb6993b4c29f29da7d09201cc99aecce8d86c223270c |
---|---|
record_format |
openpolar |
spelling |
dataone:sha256:cf1de63ecd3f7e820a2ccb6993b4c29f29da7d09201cc99aecce8d86c223270c 2024-06-03T18:46:22+00:00 The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice BEGINDATE: 2014-04-25T00:00:00Z ENDDATE: 2014-06-27T00:00:00Z 2023-01-01T00:00:00Z https://search.dataone.org/view/sha256:cf1de63ecd3f7e820a2ccb6993b4c29f29da7d09201cc99aecce8d86c223270c unknown Salinity Landfast ice Meteorological Snow Air temperature Wind speed CTD profiles Albedo Sea ice Sea ice melt Dataset 2023 dataone:urn:node:CANWIN 2024-06-03T18:19:40Z During the spring-to-summer transition, the snow cover on Arctic sea ice melts and meltwater pools on the surface to form melt ponds; however, the timing and extent of the ponding varies between years. In Dease Strait (Nunavut), this transition was particularly dramatic in 2014 when on 18 June meltwater had flooded >95% of the surface. In this study, continuous surface energy balance measurements throughout the transition highlight how the timing of transient weather events influenced seasonal shifts in distinct ice melt stages. The keys to the extensive flooding were 1) the level ice cover, 2) a strong low-pressure system on 24 May that deposited ~10 cm of snow, and 3) freeze-thaw cycling and a subsequent return to sub-zero air temperatures on 30 May that led to superimposed and interposed ice formation. Without these, melt ponds would have likely developed within days from an initial melt onset on 28 May. After a 2-week delay, snow-melt resumed and lead to near-complete flooding of the surface for four days. The albedo of the flooded ice remained high (0.35-0.40), as a result of the bubble-laden superimposed ice layer. Once this layer eroded, the albedo over melt ponds decreased to a more typical level (~0.20). Our observations suggest that the formation of superimposed and interposed ice prevented the vertical drainage of meltwater to the ocean. Future challenges remain to measure the presence of these layers and understand their effect on sea ice permeability and pond evolution while sea ice temperatures are near the melting point. We present a time series of the full surface energy budget of the landfast sea ice cover in Dease Strait, Nunavut (Canada), over the spring to summer transition in 2014. Time-series of hourly means of vertical temperature in the snow, sea ice, and seawater. This is the metadata template associated with the data files. Contains site locations for atmospheric, ice, snow and seawater data. Dataset albedo Arctic Nunavut Sea ice Unknown Arctic Canada Dease Strait ENVELOPE(-107.502,-107.502,68.834,68.834) Nunavut |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
dataone:urn:node:CANWIN |
language |
unknown |
topic |
Salinity Landfast ice Meteorological Snow Air temperature Wind speed CTD profiles Albedo Sea ice Sea ice melt |
spellingShingle |
Salinity Landfast ice Meteorological Snow Air temperature Wind speed CTD profiles Albedo Sea ice Sea ice melt The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice |
topic_facet |
Salinity Landfast ice Meteorological Snow Air temperature Wind speed CTD profiles Albedo Sea ice Sea ice melt |
description |
During the spring-to-summer transition, the snow cover on Arctic sea ice melts and meltwater pools on the surface to form melt ponds; however, the timing and extent of the ponding varies between years. In Dease Strait (Nunavut), this transition was particularly dramatic in 2014 when on 18 June meltwater had flooded >95% of the surface. In this study, continuous surface energy balance measurements throughout the transition highlight how the timing of transient weather events influenced seasonal shifts in distinct ice melt stages. The keys to the extensive flooding were 1) the level ice cover, 2) a strong low-pressure system on 24 May that deposited ~10 cm of snow, and 3) freeze-thaw cycling and a subsequent return to sub-zero air temperatures on 30 May that led to superimposed and interposed ice formation. Without these, melt ponds would have likely developed within days from an initial melt onset on 28 May. After a 2-week delay, snow-melt resumed and lead to near-complete flooding of the surface for four days. The albedo of the flooded ice remained high (0.35-0.40), as a result of the bubble-laden superimposed ice layer. Once this layer eroded, the albedo over melt ponds decreased to a more typical level (~0.20). Our observations suggest that the formation of superimposed and interposed ice prevented the vertical drainage of meltwater to the ocean. Future challenges remain to measure the presence of these layers and understand their effect on sea ice permeability and pond evolution while sea ice temperatures are near the melting point. We present a time series of the full surface energy budget of the landfast sea ice cover in Dease Strait, Nunavut (Canada), over the spring to summer transition in 2014. Time-series of hourly means of vertical temperature in the snow, sea ice, and seawater. This is the metadata template associated with the data files. Contains site locations for atmospheric, ice, snow and seawater data. |
format |
Dataset |
title |
The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice |
title_short |
The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice |
title_full |
The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice |
title_fullStr |
The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice |
title_full_unstemmed |
The Energetics of Extensive Melt Water Flooding of Level Arctic Sea Ice |
title_sort |
energetics of extensive melt water flooding of level arctic sea ice |
publishDate |
2023 |
url |
https://search.dataone.org/view/sha256:cf1de63ecd3f7e820a2ccb6993b4c29f29da7d09201cc99aecce8d86c223270c |
op_coverage |
BEGINDATE: 2014-04-25T00:00:00Z ENDDATE: 2014-06-27T00:00:00Z |
long_lat |
ENVELOPE(-107.502,-107.502,68.834,68.834) |
geographic |
Arctic Canada Dease Strait Nunavut |
geographic_facet |
Arctic Canada Dease Strait Nunavut |
genre |
albedo Arctic Nunavut Sea ice |
genre_facet |
albedo Arctic Nunavut Sea ice |
_version_ |
1800867796198883328 |