UV Radiation and Primary Production in the Antarctic Waters.

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF-1083013113&userType=user&freeTextValue=UV+Radiation+and+Primary+Production+in+the+Antarctic+Waters.

Brief Description (Abstract):

A profiling underwater radiometer was used for the first time in the waters around Indian Antarctic Station (70?46'S & 1 l?44'E) in the summer of 1994. The profiles include natural fluorescence (upwelled radiance at 683 nm), scalar irradiance (photosynthetically active radiation (PAR), computed primary production (pp), diffuse attenuation coefficient, and UVB (308 and 320 nm) and UVA (340 and 380 nm) radiation and ocean temperature all measured as a function of depth from 21/1/94 to 673/94. Fifteen stations in the Antarctic waters (69?53' to 70?02'S) and 6 en route (64?53' to 30?01'S) were analysed. The average values for surface chlorophyll a and pp were higher for temperate than for Antarctic waters (1.68 mg/m3 and 216.56 mgC/m3 /d respectively). The values for column chlorophyll (22.48 mg/m2) and primary productivity (1023.79 mgC/m2 /d) in the Antarctic waters however, were 2.14 and 1.5 times higher than those in temperate waters.

Status: Completed

Purpose: A profiling underwater radiometer (Biospherical Instruments Inc. San Diego, CA, USA) was used to procure data on chlorophyll a (chl a) derived from natural fluorescence (upwelled radiance at 683 nm, scalar irradiance-PAR (photosynthetically available radiation), diffuse attenuation coefficient (K), computed primary production (pp), UVB and UVA radiation as function of depth from 15 stations in the Antarctic waters (69?53 to 70?02S) and 6 stations from Temperate waters (64?53S to 30?01S). The instrument enables to assess the effect of sub-surface transmission of UVR in aquatic environments.

Presentation Format: Documentdigital

Distribution Format: unknown

Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Sun-Earth Interactions,

Place/Location(s): Maitri, Antarctic,

Project: UV Radiation and Primary Production in the Antarctic Waters,

Topic Category(s): ClimatologyMeteorologyAtmosphere,

Date(s): 2020-09-15 (Creation),

Resource Contact(s):
1. Name : Dr. P A Loka Bharathi
    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 : 1993-01-01
End Date   : 1994-12-31