This chapter is designed to teach you: 1  The shifts in perspectives throughout American history. 2  Characteristics of various literary periods. 3  Famous authors and their works.  How to classify American literature within a movement.
Antarctica global warming has become a burning issue of the present time. Global warming in Antarctica will pose a serious threat to the rise in water level. Hence, Antarctica global warming has become a great concern for the scientists and researchers. As most of this continent is covered by ice, the impact of global warming is more acutely felt here. With the increase in the number of automobiles, air pollution has been on the increase in the last 20 years. This is one of the major causes of global warming.
Antarctic weather. Antarctica is the coldest, windiest and driest continent on Earth. The average annual temperature ranges from about â10Â°C on the Antarctic coast to â60Â°C at the highest parts of the interior. Near the coast the temperature can exceed +10Â°C at times in summer and fall to below â40Â°C in winter. Over the elevated inland, it can rise to about â30Â°C in summer but fall below â80Â°C in winter. The lowest temperature yet recorded on the Earth's surface was â89.2Â°C at Vostok station on 21 July 1983. Surrounding Antarctica there is normally a belt of low pressure, the circumpolar trough, containing multiple low centres.