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dc.contributor.author
Richter, Andreas Jorg
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dc.contributor.author
Popov, Sergey V.
dc.contributor.author
Fritsche, Mathias
dc.contributor.author
Lukin, Valery V.
dc.contributor.author
Matveev, Alexey Yu
dc.contributor.author
Ekaykin, Alexey A.
dc.contributor.author
Lipenkov, Vladimir Ya
dc.contributor.author
Fedorov, Denis V.
dc.contributor.author
Eberlein, Lutz
dc.contributor.author
Schröder, Ludwig
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Ewert, Heiko
dc.contributor.author
Horwath, Martin
dc.contributor.author
Dietrich, Reinhard
dc.date.available
2018-03-01T20:02:34Z
dc.date.issued
2014-11
dc.identifier.citation
Richter, Andreas Jorg; Popov, Sergey V.; Fritsche, Mathias; Lukin, Valery V.; Matveev, Alexey Yu; et al.; Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations; Blackwell Publishing Ltd; Journal of Geophysical Research F: Earth Surface; 119; 11; 11-2014; 2460-2480
dc.identifier.issn
2169-9011
dc.identifier.uri
http://hdl.handle.net/11336/37613
dc.description.abstract
Height changes of the ice surface above subglacial Lake Vostok, East Antarctica, reflect the integral effect of different processes within the subglacial environment and the ice sheet. Repeated GNSS (Global Navigation Satellite Systems) observations on 56 surface markers in the Lake Vostok region spanning 11 years and continuous GNSS observations at Vostok station over 5 years are used to determine the vertical firn particle movement. Vertical marker velocities are derived with an accuracy of 1 cm/yr or better. Repeated measurements of surface height profiles around Vostok station using kinematic GNSS observations on a snowmobile allow the quantification of surface height changes at 308 crossover points. The height change rate was determined at 1 ± 5 mm/yr, thus indicating a stable ice surface height over the last decade. It is concluded that both the local mass balance of the ice and the lake level of the entire lake have been stable throughout the observation period. The continuous GNSS observations demonstrate that the particle heights vary linearly with time. Nonlinear height changes do not exceed ±1 cm at Vostok station and constrain the magnitude of spatiotemporal lake-level variations. ICESat laser altimetry data confirm that the amplitude of the surface deformations over the lake is restricted to a few centimeters. Assuming the ice sheet to be in steady state over the entire lake, estimates for the surface accumulation, on basal accretion/melt rates and on flux divergence, are derived.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Blackwell Publishing Ltd
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Ice Sheets
dc.subject
Ice Shelf
dc.subject
Mass Balance
dc.subject
Satellite Geodesy: Results
dc.subject
Antarctica
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-15T17:34:50Z
dc.journal.volume
119
dc.journal.number
11
dc.journal.pagination
2460-2480
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Richter, Andreas Jorg. Technische Universitaet Dresden; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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Fil: Popov, Sergey V.. Polar Marine Geosurvey Expedition; Rusia
dc.description.fil
Fil: Fritsche, Mathias. Technische Universitaet Dresden; Alemania
dc.description.fil
Fil: Lukin, Valery V.. Arctic And Antarctic Research Institute; Rusia
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Fil: Matveev, Alexey Yu. Oao Aerogeodeziya; Rusia
dc.description.fil
Fil: Ekaykin, Alexey A.. Arctic And Antarctic Research Institute; Rusia
dc.description.fil
Fil: Lipenkov, Vladimir Ya. Arctic And Antarctic Research Institute; Rusia
dc.description.fil
Fil: Fedorov, Denis V.. Oao Aerogeodeziya; Rusia
dc.description.fil
Fil: Eberlein, Lutz. Technische Universitaet Dresden; Alemania
dc.description.fil
Fil: Schröder, Ludwig. Technische Universitaet Dresden; Alemania
dc.description.fil
Fil: Ewert, Heiko. Technische Universitaet Dresden; Alemania
dc.description.fil
Fil: Horwath, Martin. Technische Universitaet Dresden; Alemania
dc.description.fil
Fil: Dietrich, Reinhard. Technische Universitaet Dresden; Alemania
dc.journal.title
Journal of Geophysical Research F: Earth Surface
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/2014JF003228
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2014JF003228/abstract
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