On the Distribution of Calcium, Magnesium, Sulphate and Boron in the South-Western Indian Ocean Region of the Southern Ocean

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF-1957996516&userType=user&freeTextValue=On+the+Distribution+of+Calcium%2C+Magnesium%2C+Sulphate+and+Boron+in+the+South-Western+Indian+Ocean+Region+of+the+Southern+Ocean

Brief Description (Abstract):

The major ions namely, calcium, magnesium, sulphate and boron arc studied in the south-west Indian Ocean. The concentra-tions and their ratios to chlorinity of these ions arc found to be 418K ? 5 mg/kg and 0.02191 ? 0.00017 for calcium, 1285 ? 17 mg/kg and 0.06730 ? 0.00057 for magnesium, 2.67 ? 0.004 mg/kg and 0.01399 ? 0.000067 for sulphate and 4.62 ? 0.44 mg/kg and 0.242 ? 0.023 for boron. Calcium showed distinct variations at sub-tropical convergence and Antarctic divergence whereas magnesium, though a conservative element, did not show any regular pattern of variation. Sulphate, a biologically inactive anion was found to be most conservative. Moron shows dissimilar pattern of variation in the Antartica and sub-tropical region and varies inversely with chlorinity in the sub-tropical region. The depth wise variations of all these four ions have been described.

Status: Completed

Purpose: Southern region of the Indian Ocean and the Antarctic region needs a considerable attention to understand the influence of physical processes on the major constituents and their relations with chlorinity since the waters in this region influence the deep and bottom waters of all the oceans in the Northern region. In view of this, water samples were collected along a section from 32?S to 70?S during the First Indian Expedition to Antarctica. The present report deals with the distribution of some major con-stituents like calcium, magnesium, sulphate and boron in the South-West Indian Ocean region of the Southern Ocean, An attempt has also been made to correlate the data with the physical properties of seawater.

Presentation Format: Documentdigital

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Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Marine Science,

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

Project: On the Distribution of Calcium,

Topic Category(s): Oceans,

Date(s): 2020-08-18 (Creation),

Resource Contact(s):
1. Name : Mrs. Sugandhini Naik
    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