A Comparative Study of the Variability in the Observed Ozone and that Obtained from a Statistical Model of Catalytic Destruction over Antarctica.

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Brief Description (Abstract):

Day-to-day fluctuations in total ozone during the "ozone hole" period (using the TOMS data) over the Indian Antarctic Station, Maitri have been studied. First, a statistical correlation analysis is performed on the fluctuations to reveal a characteristic correlation period (To) in the fluctuations. The extent of the effective data sample (T) to be analysed is also made known. The rms variability in the mean ozone level sT is then given in terms of the rms scatter of the observed total ozone values (s i), To and T. A value sT of during the "ozone hole" period of September 1987 is found to be about 6 D.U., which is 3 D.U. above the "noise" rms uncertainty associated with the TOMS data. Next, this "signal" rms variability of 3 D.U. estimated in the "ozone hole" period is compared with the statistical fluctuations inherent in the process of destruction of ozone through chlorine and bromine catalysis in the lower stratosphere.

Status: Completed

Purpose: Mean values of total ozone using the TOMS data are available since 1979, and show an yearly decreasing trend over Antarctica. The phenomenon of ozone hole refers to a decrease in the values of total ozone over Antarctica in the local spring compared to that in the winter period (Farman et al, 1985). This ozone depletion is spread over an altitude range of about 12 to 22 km, in the lower stratosphere. Further, large Characteristic fluctuations are observed in the values of total ozone on day-to-day time scales during the ozone hole period.

Presentation Format: Documentdigital

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Supplemental Information:

TableDigital

Keyword(s): Earth Science-Atmosphere,

Place/Location(s): Maitri, Antarctic,

Project: A Comparative Study of the Variability in the Observed Ozone and that Obtained from a Statistical Model of Catalytic Destruction over Antarctica,

Topic Category(s): ClimatologyMeteorologyAtmosphere,

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

Resource Contact(s):
1. Name : Dr. P K Pasricha
    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