Anthropogenic Activities Have Modified Weather and Climate
change is the alteration of weather and climate attributes orvariables and it is a result of an interplay of factors Climate ranging from natural phenomenon to human factors [Zhakata and Makarau 1995] .Major components of the climate system include ,temperature , precipitation,humidity, pressure and others . According to Waugh [2000] climate refers to the longterm atmospheric behaviour while weather refers to the state of the atmosphere at a local level and on a short term scale. This paper will focus on the modification of weather and climate by human beings.Hunnington in Zhakata and Makarau [1995] asserts that the driving force for the climatic system is the net absorption of solar radiation by the earth, atmosphere and oceans. He further argues that any form of interference with the above system, whether intentionally or unintentionally will lead to weather and climate modification and the modification can either be positive or negative.
According to Tyson [1987] human activities have a significant effect on climate.Bearing this assertion in mind it will be noted that human beings will intentionally modify weather and climate for their benefit,usually in industry and agriculture. Mkandla [1996] argues that because of unreliable rainfall in most parts of Zimbabwe,the department of meteorological services carry out cloud seeding to enhance the chances to precipitation .This leads to climate change since precipitation is artificially induced,thus diverting fromthe idealized precipitation process.Mabuya and Gariwe [2011] observe that human beings are the principal culprits in the weather and climate modification. In Zimbabwe and other countries wherethere is winter cropping, crops need to be protected against frost. Commercial farmers in Zimbabwe, especially in wheat production use large electric heaters which are placed at the edges of the fields and then large fans are used to blow hot air into the field
According to Tyson [1987] human activities have a significant effect on climate.Bearing this assertion in mind it will be noted that human beings will intentionally modify weather and climate for their benefit,usually in industry and agriculture. Mkandla [1996] argues that because of unreliable rainfall in most parts of Zimbabwe,the department of meteorological services carry out cloud seeding to enhance the chances to precipitation .This leads to climate change since precipitation is artificially induced,thus diverting fromthe idealized precipitation process.Mabuya and Gariwe [2011] observe that human beings are the principal culprits in the weather and climate modification. In Zimbabwe and other countries wherethere is winter cropping, crops need to be protected against frost. Commercial farmers in Zimbabwe, especially in wheat production use large electric heaters which are placed at the edges of the fields and then large fans are used to blow hot air into the field
References: Mabuya,N.A. and Garawe, S.M. (2011) Dynamics of ' 'A ' ' level Geography; College Press; Harare Mkandla, V Money, D.(2000) Weather and Climate; Nelson thorns;Cheltenhaw Sharpley, S.(1960) Climate Change: Evidence, Causes and Effects.Harvard University Press; Cambridge. Tyson, P.D.(1987) Climate change and Variability in Southern Africa;Oxford Press; Cape Town Watson, R Waugh, D.(2000) Geography An Integrated Approach; Thomas Nelson and Sons Zhakata, C