Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations

Autores
Richter, Andreas Jorg; Popov, Sergey V.; Fritsche, Mathias; Lukin, Valery V.; Matveev, Alexey Yu; Ekaykin, Alexey A.; Lipenkov, Vladimir Ya; Fedorov, Denis V.; Eberlein, Lutz; Schröder, Ludwig; Ewert, Heiko; Horwath, Martin; Dietrich, Reinhard
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Richter, Andreas Jorg. Technische Universitaet Dresden; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Popov, Sergey V.. Polar Marine Geosurvey Expedition; Rusia
Fil: Fritsche, Mathias. Technische Universitaet Dresden; Alemania
Fil: Lukin, Valery V.. Arctic And Antarctic Research Institute; Rusia
Fil: Matveev, Alexey Yu. Oao Aerogeodeziya; Rusia
Fil: Ekaykin, Alexey A.. Arctic And Antarctic Research Institute; Rusia
Fil: Lipenkov, Vladimir Ya. Arctic And Antarctic Research Institute; Rusia
Fil: Fedorov, Denis V.. Oao Aerogeodeziya; Rusia
Fil: Eberlein, Lutz. Technische Universitaet Dresden; Alemania
Fil: Schröder, Ludwig. Technische Universitaet Dresden; Alemania
Fil: Ewert, Heiko. Technische Universitaet Dresden; Alemania
Fil: Horwath, Martin. Technische Universitaet Dresden; Alemania
Fil: Dietrich, Reinhard. Technische Universitaet Dresden; Alemania
Materia
Ice sheets
Ice shelf
Mass balance
Satellite geodesy: results
Antarctica
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/37613
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/37613
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observationsRichter, Andreas JorgPopov, Sergey V.Fritsche, MathiasLukin, Valery V.Matveev, Alexey YuEkaykin, Alexey A.Lipenkov, Vladimir YaFedorov, Denis V.Eberlein, LutzSchröder, LudwigEwert, HeikoHorwath, MartinDietrich, ReinhardIce sheetsIce shelfMass balanceSatellite geodesy: resultsAntarcticahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Height 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.Fil: Richter, Andreas Jorg. Technische Universitaet Dresden; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Popov, Sergey V.. Polar Marine Geosurvey Expedition; RusiaFil: Fritsche, Mathias. Technische Universitaet Dresden; AlemaniaFil: Lukin, Valery V.. Arctic And Antarctic Research Institute; RusiaFil: Matveev, Alexey Yu. Oao Aerogeodeziya; RusiaFil: Ekaykin, Alexey A.. Arctic And Antarctic Research Institute; RusiaFil: Lipenkov, Vladimir Ya. Arctic And Antarctic Research Institute; RusiaFil: Fedorov, Denis V.. Oao Aerogeodeziya; RusiaFil: Eberlein, Lutz. Technische Universitaet Dresden; AlemaniaFil: Schröder, Ludwig. Technische Universitaet Dresden; AlemaniaFil: Ewert, Heiko. Technische Universitaet Dresden; AlemaniaFil: Horwath, Martin. Technische Universitaet Dresden; AlemaniaFil: Dietrich, Reinhard. Technische Universitaet Dresden; AlemaniaBlackwell Publishing Ltd2014-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37613Richter, 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; 2460-24802169-9011CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/2014JF003228info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2014JF003228/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:59:41Zoai:ri.conicet.gov.ar:11336/37613instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:59:41.38CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
title Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
spellingShingle Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
Richter, Andreas Jorg
Ice sheets
Ice shelf
Mass balance
Satellite geodesy: results
Antarctica
title_short Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
title_full Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
title_fullStr Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
title_full_unstemmed Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
title_sort Height changes over subglacial Lake Vostok, East Antarctica: Insights from GNSS observations
dc.creator.none.fl_str_mv Richter, Andreas Jorg
Popov, Sergey V.
Fritsche, Mathias
Lukin, Valery V.
Matveev, Alexey Yu
Ekaykin, Alexey A.
Lipenkov, Vladimir Ya
Fedorov, Denis V.
Eberlein, Lutz
Schröder, Ludwig
Ewert, Heiko
Horwath, Martin
Dietrich, Reinhard
author Richter, Andreas Jorg
author_facet Richter, Andreas Jorg
Popov, Sergey V.
Fritsche, Mathias
Lukin, Valery V.
Matveev, Alexey Yu
Ekaykin, Alexey A.
Lipenkov, Vladimir Ya
Fedorov, Denis V.
Eberlein, Lutz
Schröder, Ludwig
Ewert, Heiko
Horwath, Martin
Dietrich, Reinhard
author_role author
author2 Popov, Sergey V.
Fritsche, Mathias
Lukin, Valery V.
Matveev, Alexey Yu
Ekaykin, Alexey A.
Lipenkov, Vladimir Ya
Fedorov, Denis V.
Eberlein, Lutz
Schröder, Ludwig
Ewert, Heiko
Horwath, Martin
Dietrich, Reinhard
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ice sheets
Ice shelf
Mass balance
Satellite geodesy: results
Antarctica
topic Ice sheets
Ice shelf
Mass balance
Satellite geodesy: results
Antarctica
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Richter, Andreas Jorg. Technische Universitaet Dresden; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Popov, Sergey V.. Polar Marine Geosurvey Expedition; Rusia
Fil: Fritsche, Mathias. Technische Universitaet Dresden; Alemania
Fil: Lukin, Valery V.. Arctic And Antarctic Research Institute; Rusia
Fil: Matveev, Alexey Yu. Oao Aerogeodeziya; Rusia
Fil: Ekaykin, Alexey A.. Arctic And Antarctic Research Institute; Rusia
Fil: Lipenkov, Vladimir Ya. Arctic And Antarctic Research Institute; Rusia
Fil: Fedorov, Denis V.. Oao Aerogeodeziya; Rusia
Fil: Eberlein, Lutz. Technische Universitaet Dresden; Alemania
Fil: Schröder, Ludwig. Technische Universitaet Dresden; Alemania
Fil: Ewert, Heiko. Technische Universitaet Dresden; Alemania
Fil: Horwath, Martin. Technische Universitaet Dresden; Alemania
Fil: Dietrich, Reinhard. Technische Universitaet Dresden; Alemania
description 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.
publishDate 2014
dc.date.none.fl_str_mv 2014-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/37613
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
2169-9011
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37613
identifier_str_mv 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
2169-9011
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JF003228
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2014JF003228/abstract
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Blackwell Publishing Ltd
publisher.none.fl_str_mv Blackwell Publishing Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269595243642880
score 13.13397

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