Solar Uv-b Atmospheric Aerosol Studies at Antarctica.

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Brief Description (Abstract):

Solar radiation intensities in the wavelength range of UV-B, visible and near Infra red (280-800 nm) were monitored over Indian Antarctic Station Maitri during the 17th Indian Antarctic Scientific Expedition. From the solar radiation intensity measurements in LIVES range the erythemal Doses in the units of predefined Minimum Erythemal Doses per hour (MED/Hr) are derived and their characteristics are studied during this period. It is found that maximum MED values reached during the month of December 1998 with its magnitude 4.00MED/Hr at local noon of 1st December 1998. The solar radiation intensities in the VIS-NIR range are used to derive and study the aerosol optical depths over Antarctica. From these studies it is found that the representative optical depths at 368, 500, 675 and 778 nm wavelengths, the corresponding optical depths are 0.75, 0.25, 0.097 and 0.048 respectively, which shows that at Antarctica the optical depth increases with decreasing wavelength.

Status: Completed

Purpose: The present human concern about the environment is inciting the scientific community to probe and characterise the different aspects of environment. The multifaceted involvement of the solar radiation in affecting the environment makes the solar radiation as an important environmental parameter. The solar radiation passes through the earths atmosphere before reaching the earth surface. Any observation of solar radiation at earth surface will be having the signatures of the processes involved between the solar radiation and earth atmosphere. The Ultra-Violet solar radiations, which are sensitive to their interactions with the ozone gas present in the stratosphere, carry to the ground the signatures of the variabilities in the concentrations of ozone gas in the stratosphere. After the discovery of the ozone hole over Antarctica, the study of these ultraviolet radiations over Antarctica was recommended very strongly.

Presentation Format: Documentdigital

Distribution Format: unknown

Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Atmosphere,

Place/Location(s): Maitri, Antarctic,

Project: Solar Uv-b Atmospheric Aerosol Studies at Antarctica,

Topic Category(s): ClimatologyMeteorologyAtmosphere,

Date(s): 2020-09-21 (Creation),

Resource Contact(s):
1. Name : Dr. Shambhu Nath
    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 : 1997-01-01
End Date   : 1998-12-31