Some Physical Characteristics of the Antarctic and Western Indian Oceans

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF1977657583&userType=user&freeTextValue=Some+Physical+Characteristics+of+the+Antarctic+and+Western+Indian+Oceans

Brief Description (Abstract):

Expendable bathythermograph (XBT) and hydro graphic observations made along the transects through Antarctic and western Indian Oceans on board M. V. Polar Circle during the First Indian Antarctic Expedition have been analysed and presentedin this paper. A wide north-south variation in the physical oceanographic parameters has been noticed along the transects. Maximum sea surface temperatures have been observed between latitudes 6-10OS and a sharp fall of temperature has been found near the convergence zones particularly between latitudes 40-50?S. The surface temperatures ranged between 28.7OC and -1.7OC. The depths of the isothermal (mixed) layer in the Antarctic waters to the south of latitude 68?S extend to as deep as 200-400 m while at other regions, they are found to be within 100 m. The data clearly shows that a convergence process is taking place around 60OS with the Antarctic surface water slipping below and mixing with the sub antarctic surface water.

Status: Completed

Purpose: The exploration of t h e Antarctic Ocean (Southern Ocean) receives much attention by oceanogra-phers of various disciplines, because the ocean supports all the animal life and has a tremendous influenceon meteorology and geophysical problems. During the First Indian Antarctic Expedition (Dec. 1981 -Feb. 1982), a preliminary study of various aspects of Antarctic Ocean waters have been undertaken. Onboard M.V. Polar Circle, expendable bathythermograph (XBT) and hydrographic observations have been made in the area of interest (Fig. 1). The cruise track covered a very long stretch from Mormugaoport on Indias west coast to the continent of Antarctica-. The expendable bathythermograph records inthe depth range (0-760 m) have been obtained at 154 stations along the cruise track using the system developed by Sippican, USA. Seventeen hydrographic stations have been covered between latitudes70-30?S and the water samples collected from standard depths.

Presentation Format: Documentdigital

Distribution Format: Oceans

Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Oceans,

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

Project: Some Physical Characteristics of the Antarctic and Western Indian Oceans,

Topic Category(s): Oceans,

Date(s): 2020-08-17 (Creation),

Resource Contact(s):
1. Name : Dr. D V Rama Raju
    Role : PrincipalInvestigator
    Phone : 8322525515
    E-Mail : vssamy [ at ] ncaor.gov.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 : 1981-01-01
End Date   : 1982-12-31