2012-2013 mapping of mud ejections at Cape Bounty, Melville Island
Mud ejections are sediment slurries ejected from the base of an active layer forming flows or small stratiform deposits on the surface. Mud ejections were mapped at the Cape Bounty Arctic Watershed Observatory (CBAWO) in June–July 2012 and July 2013. The study area was traversed on foot by two or th...
Main Authors: | , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
Canadian Cryospheric Information Network
2017
|
Subjects: | |
Online Access: | https://dx.doi.org/10.5884/12830 https://www.polardata.ca/pdcsearch/?doi_id=12830 |
id |
ftdatacite:10.5884/12830 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.5884/12830 2023-05-15T14:51:08+02:00 2012-2013 mapping of mud ejections at Cape Bounty, Melville Island Lamoureux, Scott Holloway, Jean 2017 https://dx.doi.org/10.5884/12830 https://www.polardata.ca/pdcsearch/?doi_id=12830 en eng Canadian Cryospheric Information Network Public Active layer Cape Bounty Mapping Melville Island Permafrost Thawing Arctic Development and Adaptation to Permafrost in Transition ArcticNet Network of Centres of Excellence of Canada dataset Dataset 2017 ftdatacite https://doi.org/10.5884/12830 2021-11-05T12:55:41Z Mud ejections are sediment slurries ejected from the base of an active layer forming flows or small stratiform deposits on the surface. Mud ejections were mapped at the Cape Bounty Arctic Watershed Observatory (CBAWO) in June–July 2012 and July 2013. The study area was traversed on foot by two or three observers, and the locations of active and inactive mud ejections were mapped using a Garmin 60Cx GPS unit (Garmin International Inc., St. Olathe, KS, USA) (±3 m typical ground uncertainty). A total of 229 mud ejections were mapped and locations were recorded as WGS84 UTM Zone 12X. : Purpose: The purpose of this project is to systematically map the locations of mud ejections. Warming of the Arctic in recent years has led to changes in the active layer (layer above the permafrost that freezes and thaws seasonally) and uppermost permafrost. In particular, thick active layer formation thaws near surface ground ice. This addition of moisture, as well as infiltration from late season precipitation, results in high pore-water pressures (PWPs) at the base of the active layer and the formation of pressurized sediment slurries called mud ejections. These features are not well documented in literature, but could represent areas where subsurface porewater pressures are potentially hazardous (Holloway, J.E., Lamoureux, S.F., Montross, S.N., and Lafrenière, M.: Climate and terrain characteristics linked to mud ejection occurrence in the Canadian High Arctic, Permafrost Periglac. DOI: 10.1002/ppp.1870, 2016.). : Summary: Not Applicable Dataset Arctic ArcticNet Ice permafrost Melville Island DataCite Metadata Store (German National Library of Science and Technology) Arctic Canada Holloway ENVELOPE(163.600,163.600,-84.750,-84.750) Cape Bounty ENVELOPE(-109.542,-109.542,74.863,74.863) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Active layer Cape Bounty Mapping Melville Island Permafrost Thawing Arctic Development and Adaptation to Permafrost in Transition ArcticNet Network of Centres of Excellence of Canada |
spellingShingle |
Active layer Cape Bounty Mapping Melville Island Permafrost Thawing Arctic Development and Adaptation to Permafrost in Transition ArcticNet Network of Centres of Excellence of Canada Lamoureux, Scott Holloway, Jean 2012-2013 mapping of mud ejections at Cape Bounty, Melville Island |
topic_facet |
Active layer Cape Bounty Mapping Melville Island Permafrost Thawing Arctic Development and Adaptation to Permafrost in Transition ArcticNet Network of Centres of Excellence of Canada |
description |
Mud ejections are sediment slurries ejected from the base of an active layer forming flows or small stratiform deposits on the surface. Mud ejections were mapped at the Cape Bounty Arctic Watershed Observatory (CBAWO) in June–July 2012 and July 2013. The study area was traversed on foot by two or three observers, and the locations of active and inactive mud ejections were mapped using a Garmin 60Cx GPS unit (Garmin International Inc., St. Olathe, KS, USA) (±3 m typical ground uncertainty). A total of 229 mud ejections were mapped and locations were recorded as WGS84 UTM Zone 12X. : Purpose: The purpose of this project is to systematically map the locations of mud ejections. Warming of the Arctic in recent years has led to changes in the active layer (layer above the permafrost that freezes and thaws seasonally) and uppermost permafrost. In particular, thick active layer formation thaws near surface ground ice. This addition of moisture, as well as infiltration from late season precipitation, results in high pore-water pressures (PWPs) at the base of the active layer and the formation of pressurized sediment slurries called mud ejections. These features are not well documented in literature, but could represent areas where subsurface porewater pressures are potentially hazardous (Holloway, J.E., Lamoureux, S.F., Montross, S.N., and Lafrenière, M.: Climate and terrain characteristics linked to mud ejection occurrence in the Canadian High Arctic, Permafrost Periglac. DOI: 10.1002/ppp.1870, 2016.). : Summary: Not Applicable |
format |
Dataset |
author |
Lamoureux, Scott Holloway, Jean |
author_facet |
Lamoureux, Scott Holloway, Jean |
author_sort |
Lamoureux, Scott |
title |
2012-2013 mapping of mud ejections at Cape Bounty, Melville Island |
title_short |
2012-2013 mapping of mud ejections at Cape Bounty, Melville Island |
title_full |
2012-2013 mapping of mud ejections at Cape Bounty, Melville Island |
title_fullStr |
2012-2013 mapping of mud ejections at Cape Bounty, Melville Island |
title_full_unstemmed |
2012-2013 mapping of mud ejections at Cape Bounty, Melville Island |
title_sort |
2012-2013 mapping of mud ejections at cape bounty, melville island |
publisher |
Canadian Cryospheric Information Network |
publishDate |
2017 |
url |
https://dx.doi.org/10.5884/12830 https://www.polardata.ca/pdcsearch/?doi_id=12830 |
long_lat |
ENVELOPE(163.600,163.600,-84.750,-84.750) ENVELOPE(-109.542,-109.542,74.863,74.863) |
geographic |
Arctic Canada Holloway Cape Bounty |
geographic_facet |
Arctic Canada Holloway Cape Bounty |
genre |
Arctic ArcticNet Ice permafrost Melville Island |
genre_facet |
Arctic ArcticNet Ice permafrost Melville Island |
op_rights |
Public |
op_doi |
https://doi.org/10.5884/12830 |
_version_ |
1766322190896070656 |