Monitoring of glacial dynamics in Johnson Dock (Livingston Island)

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Monitoring of glacial dynamics in Johnson Dock (Livingston Island)
Description:
Abstract:
In English: The techiniques used to extrapolate seasonal behaviour to annual behaviour, were: - A Geodolite 504 to measure the position of each stake and 3 new stakes were installed to obtain measurements along a hypothetical ice flow device, which were deduced from data collected so far. -To collect new samples of ash layers. -To take pictures of the ice cliffs using the same photogrammetric camera from fixed points with well-known coordinates, one year later. A photogrammetric model has been elaborated to obtain the thickness and ice front position from these stereoscopic pictures.The data collected throughout these campaigns have contributed to the knowledge of the annual and seasonal ice flow, and their relationship between the ice dynamic and parameters such as the equilibrium line, the snow line or the mass balance of Johnson glacier. The main results are: A sharp increase of ice flow from ice device to ice front, with annual velocities between 0.19 cm/day and 7.38 cm/day (28 m.), and values of the ratio V.Seasonal/V.Annual between 0.68 and 9.67. About the mass balance: the great ablation rate during the austral summer and the importance of the snow drift by the wind as a mechanism of balance. The analysis of the stereoscopic pictures by using the photogrammetric model will promote knowledge of the glacier mechanism, calving, and also the seasonal and annual changes in glacier geometry. En Espanol: Las experiencias para alargar el comportamiento estacional a comportamiento anual fueron: -Uso de un teodolito 504 para medir la posicion de cada estaca e instalacion de 3 nuevas estacas con lo que se pudieron obtener medidas a lo largo de un hipotetico dispositivo de flujo de hielo, deducido a partir de la recoleccion de datos. -Recoleccion de nuevas muestras de capas de cenizas. -Fotografias de grietas de hielo usando la camara fotogrametrica desde puntos fijos con coordenadas bien conocidas, un ano despues. Se ha elaborado un modelo fotogrametrico para obtener el espesor y la posicion del frente de hielo a partir de estas fotografias estereoscopicas. Los datos tomados a lo largo de estas campanas han permito conocer el flujo anual y estacional, y las relaciones entre la dinamica del hielo y los parametros como la linea de equilibrio, la linea de nieve o el balance de masas del glaciar Jonhson.Los principales resultados son: Un preciso incremento del flujo de hielo desde el dispositivo al frente de hielo, con velocidades anuales entre 0,19 cm/dia y 7,38 cm/dia (28m) y valores proporcionales velocidad estacional/anual entre 0,68 y 9,67. Sobre el balance de masas: el gran indice de ablacion durante el verano austral y la importancia de las ventiscas de nieve como mecanismo de equilibrio. El analisis de las fotografias estereoscopicas usando el modelo fotogrametrico permitira conocer el mecanismo de desprendimientos del glaciar y tambien los cambios anuales y estacionales en la geometria del glaciar.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19950215
Ending_Date: 19960215
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -62.0
East_Bounding_Coordinate: -60.0
North_Bounding_Coordinate: -62.0
South_Bounding_Coordinate: -63.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > ICE DEPTH/THICKNESS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > ICE GROWTH/MELT
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > ICE MOTION
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > ICE VELOCITY
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > ISOTOPES
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > VOLCANIC DEPOSITS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ABLATION ZONES/ACCUMULATION ZONES
Theme_Keyword: ERS-1 > EUROPEAN REMOTE SENSING SATELLITE-1
Theme_Keyword: LANDSAT
Theme_Keyword: SPOT-1 > SYSTEME PROBATOIRE POUR L'OBSERVATION DE LA TERRE-1
Theme_Keyword: STEREOGRAPHIC PHOTOGRAPHS
Theme_Keyword: CAMERAS
Theme_Keyword: THEODOLITE
Theme_Keyword: GAMMA RADIATION DETECTOR
Theme_Keyword: Moniotoring
Theme_Keyword: Glacier Dynamics
Theme_Keyword: Mass Balance
Theme_Keyword: Photogrammetric Cameras
Theme_Keyword: Stakes
Theme_Keyword: Geodolites
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: INLAND WATERS
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > ANTARCTIC PENINSULA > SCOTIA SEA > SOUTH SHETLAND ISLANDS > LIVINGSTON ISLAND
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: JAUME CALVET
Contact_Position: TECHNICAL CONTACT
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Dpto. Geodinamica y Geofisica
Address: Facultad de Geologia
Address: Universidad de Barcelona
Address: c/ Marti Franquest s/n
City: Barcelona
Postal_Code: 08028
Country: Spain
Contact_Voice_Telephone: +3493402137
Contact_Facsimile_Telephone: +34934021340
Contact_Electronic_Mail_Address: calvetj@natura.geo.ub.es
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: UB-ES/FGEO/DGG > Departamento Geodinimica y Geofisica, Facultat de Geologia, Universidad de Barcelona
Contact_Person: JAUME CALVET
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Dpto. Geodinamica y Geofisica
Address: Facultad de Geologia
Address: Universidad de Barcelona
Address: c/ Marti Franquest s/n
City: Barcelona
Postal_Code: 08028
Country: Spain
Contact_Voice_Telephone: +3493402137
Contact_Facsimile_Telephone: +34934021340
Contact_Electronic_Mail_Address: calvetj@natura.geo.ub.es
Resource_Description: CNDA-ESP_ANT95-1628-E
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII;BINARY
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ub.es/geodgf/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20030421
Metadata_Review_Date: 20080724
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ANTONIO BARRAGAN SANABRIA
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Centro Nacional de Datos Antarticos
Address: Instituto Geologico y Minero de Espana
Address: c/Rios Rosas 23
City: Madrid
Postal_Code: 28003
Country: SPAIN
Contact_Voice_Telephone: +34913495731
Contact_Facsimile_Telephone: +34913495929
Contact_Electronic_Mail_Address: a.barragan@igme.es
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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