Pakistan Research Repository

A QUANTITATIVE STUDY OF EFFECTS OF OZONE LAYER DEPLETION ON MARINE ORGANISMS WITH REFERENCE TO COASTAL REGIONS OF PAKISTAN

Yousafzai, Muhammad Ayub Khan (2003) A QUANTITATIVE STUDY OF EFFECTS OF OZONE LAYER DEPLETION ON MARINE ORGANISMS WITH REFERENCE TO COASTAL REGIONS OF PAKISTAN. PhD thesis, University of Karachi, Karachi.

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Abstract

Though, ozone is a minor constituent of the atmosphere of the earth, it is of considerable importance to mankind because of its role as a shield for the biosphere against the UV radiation from the outer space, in particular from the sun. Developing a quantitative treatment for body of data covering a specific period, this thesis reports for Pakistan an explorative assessment of the ozone layer depletion. The study also appraises results in terms of physical interpretation. For the empirical study of OLD and its fluctuating dynamics stochastic models are developed and are compared with regression models The process of the filtration of solar UV radiation through ozonosphere and the mechanism of the penetration of UV radiations in the stratosphere are studied by quantifying the UV flux reaching the earth via ozone filter and constructing probabilistic and stochastic models. Bolometry of stratospheric ozone is carried out to study variations due to OLD in sea surface temperature and the wavelength of maximum emission of infra red radiation reaching the sea surface The thesis further studies the direct and indirect effects of OLD and UV radiations on marine organisms, such as fish, phyto-plankton, fish yield of the Baluchistan and Sindh coasts of Pakistan It is hoped that our models and forecasts will be useful for various private, and public sector organizations

Item Type:Thesis (PhD)
Uncontrolled Keywords:ozone layer, marine organisms, coastal regions, pakistan, ozonosphere, solar uv radiation, ultraviolet flux
Subjects:Physical Sciences (f) > Physics(f1)
ID Code:1384
Deposited By:Mr. Muhammad Asif
Deposited On:19 Feb 2007
Last Modified:04 Oct 2007 21:06

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