Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell?
Submarine landslides are one of the major mechanisms through which sediment is transported across our planet, and it has been proposed that they can generate exceptionally damaging tsunamis. Polar margins represent one of the environmental settings where these events have been identified. A large nu...
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ftoceanrep:oai:oceanrep.geomar.de:24696 2023-05-15T15:02:02+02:00 Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell? Pope, Ed Talling, Peter Urlaub, Morelia Hunt, James Clare, Michael Challenor, Peter 2014 text https://oceanrep.geomar.de/id/eprint/24696/ https://oceanrep.geomar.de/id/eprint/24696/1/EGU2014-7818.pdf en eng https://oceanrep.geomar.de/id/eprint/24696/1/EGU2014-7818.pdf Pope, E., Talling, P., Urlaub, M. , Hunt, J., Clare, M. and Challenor, P. (2014) Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell?. [Poster] In: EGU General Assembly 2014. , 27.04.-02.05.2014, Vienna, Austria . Conference or Workshop Item NonPeerReviewed 2014 ftoceanrep 2023-04-07T15:13:27Z Submarine landslides are one of the major mechanisms through which sediment is transported across our planet, and it has been proposed that they can generate exceptionally damaging tsunamis. Polar margins represent one of the environmental settings where these events have been identified. A large number of triggers and preconditioning factors have been proposed as possible causes for these events; including earthquakes, rapid sedimentation and gas hydrate dissociation. Rapid climate change in the Arctic has the potential to impact on these preconditioning and triggering factors. First, crustal rebound associated with ice melting is likely to produce larger and more frequent earthquakes. Second, Arctic Ocean warming over the next few decades may lead to dissociation of methane hydrates in marine sediments, thereby weakening sediment. In order to better understand whether landslide frequency will increase in the future, we need to determine whether landslide frequency has been affected by previous episodes of rapid climate or eustatic sea level change. Previous working whether landslide frequency is affected strongly by climatic change has been based predominantly on qualitative analysis, and has concluded that event clustering has occurred under specific environmental conditions. In contrast, two recent statistical investigations of submarine landslides have found events frequencies to follow a Poissonian distribution and thus are temporally random (Urlaub et al, 2013, QSR; Clare et al., Geology, Vol 42 (3)). However, these recent studies acknowledge the significant uncertainties in most landslide dates, and that these uncertainties could mask underlying relationships with climate or sea level. This presentation extends previous statistical work to assess whether landslide frequency is most likely temporally random, or whether the dating is just too uncertain to tell. Chi-Squared statistics are used to explore the extent to which we can be statistically sure that submarine landslides do indeed follow a Poissonian ... Conference Object Arctic Arctic Ocean Climate change OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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English |
description |
Submarine landslides are one of the major mechanisms through which sediment is transported across our planet, and it has been proposed that they can generate exceptionally damaging tsunamis. Polar margins represent one of the environmental settings where these events have been identified. A large number of triggers and preconditioning factors have been proposed as possible causes for these events; including earthquakes, rapid sedimentation and gas hydrate dissociation. Rapid climate change in the Arctic has the potential to impact on these preconditioning and triggering factors. First, crustal rebound associated with ice melting is likely to produce larger and more frequent earthquakes. Second, Arctic Ocean warming over the next few decades may lead to dissociation of methane hydrates in marine sediments, thereby weakening sediment. In order to better understand whether landslide frequency will increase in the future, we need to determine whether landslide frequency has been affected by previous episodes of rapid climate or eustatic sea level change. Previous working whether landslide frequency is affected strongly by climatic change has been based predominantly on qualitative analysis, and has concluded that event clustering has occurred under specific environmental conditions. In contrast, two recent statistical investigations of submarine landslides have found events frequencies to follow a Poissonian distribution and thus are temporally random (Urlaub et al, 2013, QSR; Clare et al., Geology, Vol 42 (3)). However, these recent studies acknowledge the significant uncertainties in most landslide dates, and that these uncertainties could mask underlying relationships with climate or sea level. This presentation extends previous statistical work to assess whether landslide frequency is most likely temporally random, or whether the dating is just too uncertain to tell. Chi-Squared statistics are used to explore the extent to which we can be statistically sure that submarine landslides do indeed follow a Poissonian ... |
format |
Conference Object |
author |
Pope, Ed Talling, Peter Urlaub, Morelia Hunt, James Clare, Michael Challenor, Peter |
spellingShingle |
Pope, Ed Talling, Peter Urlaub, Morelia Hunt, James Clare, Michael Challenor, Peter Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell? |
author_facet |
Pope, Ed Talling, Peter Urlaub, Morelia Hunt, James Clare, Michael Challenor, Peter |
author_sort |
Pope, Ed |
title |
Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell? |
title_short |
Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell? |
title_full |
Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell? |
title_fullStr |
Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell? |
title_full_unstemmed |
Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell? |
title_sort |
are large submarine landslides in polar regions temporally random, or do current observations and age constraint make it impossible to tell? |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/24696/ https://oceanrep.geomar.de/id/eprint/24696/1/EGU2014-7818.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change |
genre_facet |
Arctic Arctic Ocean Climate change |
op_relation |
https://oceanrep.geomar.de/id/eprint/24696/1/EGU2014-7818.pdf Pope, E., Talling, P., Urlaub, M. , Hunt, J., Clare, M. and Challenor, P. (2014) Are large submarine landslides in Polar Regions temporally random, or do current observations and age constraint make it impossible to tell?. [Poster] In: EGU General Assembly 2014. , 27.04.-02.05.2014, Vienna, Austria . |
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