Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model
The fast flowing ice stream of the Pine Island Glacier (PIG) in West Antarctica feeds the Pine Island Ice Shelf (PIIS). Its flow acceleration, thinning and mass loss has been associated with changes in sub-ice shelf ocean circulation. Several recent field and remote sensing programs focused on the P...
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ftawi:oai:epic.awi.de:30821 2024-09-15T17:40:43+00:00 Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model Losch, Martin Heimbach, Patrick Schodlok, Michael Dutrieux, Pierre 2012 application/pdf https://epic.awi.de/id/eprint/30821/ https://epic.awi.de/id/eprint/30821/1/frisp2012_piis.pdf https://hdl.handle.net/10013/epic.39749 https://hdl.handle.net/10013/epic.39749.d001 unknown https://epic.awi.de/id/eprint/30821/1/frisp2012_piis.pdf https://hdl.handle.net/10013/epic.39749.d001 Losch, M. orcid:0000-0002-3824-5244 , Heimbach, P. , Schodlok, M. and Dutrieux, P. (2012) Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model , FRISP Workshop, Utö, Sweden, 12 June 2012 - 14 June 2012 . hdl:10013/epic.39749 EPIC3FRISP Workshop, Utö, Sweden, 2012-06-12-2012-06-14 Conference notRev 2012 ftawi 2024-06-24T04:05:07Z The fast flowing ice stream of the Pine Island Glacier (PIG) in West Antarctica feeds the Pine Island Ice Shelf (PIIS). Its flow acceleration, thinning and mass loss has been associated with changes in sub-ice shelf ocean circulation. Several recent field and remote sensing programs focused on the Pine Island Embayment and PIG to study the local circulation, water mass properties, as well as bathymetry and cavity geometry. Observations of water mass properties entering and leaving the ice-cavity of the PIIS, as well as observations within the cavity are used to estimate a horizontal map of basal melt rates for the PIIS. For this purpose a regional ocean general circulation model that includes ice-ocean interactions is fitted to observations using optimal estimation methods. Hence, the estimates combine on both observations and the dynamical information about the circulation underneath the ice-shelf as resolved by the numerical model. The control variables, that are adjusted during the estimation process, are initial conditions, open boundary conditions, vertical mixing parameters, and melt rates. Data coverage, but also the choice of bathymetry and melt-rate parameterization, affect the state estimate and the net melt rate. Conference Object Antarc* Antarctica Ice Shelf Pine Island Pine Island Glacier West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
The fast flowing ice stream of the Pine Island Glacier (PIG) in West Antarctica feeds the Pine Island Ice Shelf (PIIS). Its flow acceleration, thinning and mass loss has been associated with changes in sub-ice shelf ocean circulation. Several recent field and remote sensing programs focused on the Pine Island Embayment and PIG to study the local circulation, water mass properties, as well as bathymetry and cavity geometry. Observations of water mass properties entering and leaving the ice-cavity of the PIIS, as well as observations within the cavity are used to estimate a horizontal map of basal melt rates for the PIIS. For this purpose a regional ocean general circulation model that includes ice-ocean interactions is fitted to observations using optimal estimation methods. Hence, the estimates combine on both observations and the dynamical information about the circulation underneath the ice-shelf as resolved by the numerical model. The control variables, that are adjusted during the estimation process, are initial conditions, open boundary conditions, vertical mixing parameters, and melt rates. Data coverage, but also the choice of bathymetry and melt-rate parameterization, affect the state estimate and the net melt rate. |
format |
Conference Object |
author |
Losch, Martin Heimbach, Patrick Schodlok, Michael Dutrieux, Pierre |
spellingShingle |
Losch, Martin Heimbach, Patrick Schodlok, Michael Dutrieux, Pierre Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model |
author_facet |
Losch, Martin Heimbach, Patrick Schodlok, Michael Dutrieux, Pierre |
author_sort |
Losch, Martin |
title |
Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model |
title_short |
Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model |
title_full |
Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model |
title_fullStr |
Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model |
title_full_unstemmed |
Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model |
title_sort |
estimating pine island ice shelf melt rates from hydrography and an ocean circulation model |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/30821/ https://epic.awi.de/id/eprint/30821/1/frisp2012_piis.pdf https://hdl.handle.net/10013/epic.39749 https://hdl.handle.net/10013/epic.39749.d001 |
genre |
Antarc* Antarctica Ice Shelf Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Ice Shelf Pine Island Pine Island Glacier West Antarctica |
op_source |
EPIC3FRISP Workshop, Utö, Sweden, 2012-06-12-2012-06-14 |
op_relation |
https://epic.awi.de/id/eprint/30821/1/frisp2012_piis.pdf https://hdl.handle.net/10013/epic.39749.d001 Losch, M. orcid:0000-0002-3824-5244 , Heimbach, P. , Schodlok, M. and Dutrieux, P. (2012) Estimating Pine Island Ice Shelf melt rates from hydrography and an ocean circulation model , FRISP Workshop, Utö, Sweden, 12 June 2012 - 14 June 2012 . hdl:10013/epic.39749 |
_version_ |
1810486749932027904 |