Environmental Engg

1. ENVIRONMENTAL ENGINEERING
EL- NINO & LA-NINA
PRESENTED BY
Shilpa konte
Department of chemistry

4. El- nino is a naturally occurring event in the equatorial region
which causes temporary changes in the world climate.
Originally El- nino as the name used for warmer than normal
sea surface temperature in the pacific ocean off the coast of
south America.
Now El - nino has come to refer to a hole complex of pacific
ocean sea surface temperature changes and global weather
events.
The ocean arming off south America is just one of these
events.

6. WHY IT IS CALLED EL –NINO
 Fisherman off the west coast of south America were the first
to notice appearances of unusually warm water that
occurred at years end.
 The phenomenon became known as EL- nino because of its
tendency to occur around Christmas time.
 El - nino is Spanish for ‘the boy child’ and is named after
the baby Jesus.

7. WHAT IS ENSO
 ENSO is the “EL- nino southern oscillation” the
name scientists use for that is often called EL-nino.
 The southern oscillation is a see saw shift in surface
air pressure between the eastern and western halves of
the pacific.
 When pressure rises in the east, it falls in the west and
vice-versa.
 In the1950’s scientist realized that El -nino and
southern oscillation were parts of the same event.

8. WHAT CAUSES AN EL – NINO

19. LA NINA