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        Topic N8 ("The Weather and Climate Fluctuations")

 

'Funny weather we are having' is a statment  of  the  obvious  we

have used for generations as a greeting. When the deep cold lasts

long and heavy snow and blizzards give us the shivers we  replace

"funny" with something stronger, such as  "terrible",  "ghastly".

At times like these people ask what is happening to the  weather.

So we go to the experts, who tells us, in language appropriate to

the subject, what happened yesterday, what  is  happening  today,

and what might happen in the next few years. Weather and  climate

specialists all over the world have ammassed a  vast  quanity  of

information. They can describe what is happening around us.  With

satellites they can forecast more accurately what might happen in

the immediate future. Their research has produced evidence of why

past climatic changes took place.

     There have been many climate fluctuations  ovver  th  10,000

years since Britain was last covered with an ice sheet.  Advances

and retreats of ice in the northern hemisphere  during  the  past

500,000 years can be accounted for by changes in the warmth  from

the Sun.

     This was caused by  alterations  in  the  Earth's  orbit  at

periods of 96,000, 40,000 and 20,000 years.

     Although that  theory  is  widley  accepted  as  a  possible

explanations for ice ages, it has not been proved. More  than  50

theories have been put forward, but only  a  few  have  not  been

completely dismissed.

     Not long ago a new  theory  was  published  in  the  science

journal "Nature". According to  Dr.  Garry  Hunt,  of  University

College, intense radiations  from  the  nuclear  explosion  of  a

nearby supernova - a star - could cause the destruction  of  part

or all of the ozone layer and in this way trigger an ice age.

     As for me, i like  Autumn  best  of  all.  The  days  become

shorter and the nights longer. It isn't so hot in  the  day-time.

The trees are covered with yellow and red leaves. At the  end  of

summer apples, pears, plums and other fruit become ripe.  In  the

South there are many oranges, peaches and tangerines.  Autumn  is

plesant when it does not rain. General Autumn is a  rainy  season

of the year. When it rains the  weather  is  nasty.  The  sky  is

covered with heavy clouds. It drizzles. It is muddy and wet.

A*.FRM*.MAC


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