Monitoring of Icebergs in Antarctic Waters and A Note on the Secular Movement of Dakshin Gangotri Glacier.

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF-751111438&userType=user&freeTextValue=Monitoring+of+Icebergs+in+Antarctic+Waters+and+A+Note+on+the+Secular+Movement+of+Dakshin+Gangotri+Glacier.

Brief Description (Abstract):

Iceberg monitoring in the Antarctic waters, during onward and return cruise of Ninth Indian Antarctic Expedition, has revealed concentration of icebergs in two well defined zones separated by an iceberg free zone, in between. Distribution pattern and the analyses of size-shape parameters of these icebergs have shown that the majority of large sized (> 500m), tabular icebergs are concentrated in the area close to the Antarctic coastline as compared to the pinnacled and/or disintegrating icebergs (of < 500 m class) which show relative abundance between the S 51 ? and S 60? latitudes. A marked similarity in the distribution patterns of the icebergs during successive voyages has been noticed. Monitoring of the snout of Dakshin Gangotri glacier during austral summer of 1991 and its comparison with the results of earlier studies reveals minor oscillation of the frontal part of snout and the proglacial lake at the foot of this snout.

Status: Completed

Purpose: Large blocks of ice, calved from the ice shelf or derived from the glacier tongues are termed as icebergs. As per an estimate, nearly 5000 icebergs of varying dimensions are produced annually in Antarctica. Those of the icebergs which are not grounded, float in the southern ocean waters, governed by the circumpolar currents and the strong Antarctic wind patterns, causing navigational hazards. Monitoring of the icebergs visually and by satellite imagery has become an integral part of glaciological studies as this provides an important input to the overall mass balanee studies of Antarctic icesheet. Iceberg monitoring was carried out during the onward and return voyages of the Ninth Indian Antarctic Expedition as per the guidelines of Norsk Polar Institute (Norwegian Polar Research Institute). It included recording of location, dimensional aspects like size, shape, tilt etc. and the study of morphological characteristics of icebergs encountered along the cruise.

Presentation Format: Documentdigital

Distribution Format: unknown

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Supplemental Information:

TableDigital

Keyword(s): Earth Science-Cryosphere,

Place/Location(s): Dakshin Gangotri, Antarctic,

Project: Monitoring of Icebergs in Antarctic Waters and A Note on the Secular Movement of Dakshin Gangotri Glacier,

Topic Category(s): GeoScientific Information,

Date(s): 2020-09-09 (Creation),

Resource Contact(s):
1. Name : Dr. R Ravindra
    Role : PrincipalInvestigator
    Phone : 8322525515
    E-Mail : ictd [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Distributor Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : Distributor
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Metadata Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : PointOfContact
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Extent:
Start Date : 1989-01-01
End Date   : 1990-12-31