PPT: El Nino & La Nina- 1 | Geography for UPSC CSE PDF Download

 Page 1


El Nino
LA Nina
Indian Ocean Dipole Ocean Dipole
Page 2


El Nino
LA Nina
Indian Ocean Dipole Ocean Dipole
El Nino
?El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of
?When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly
?El Niño normally occurs
around Christmas
weeks to a few months.
El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of Ecuador and Peru.
When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly reduced.
El Niño normally occurs
Christmas and usually lasts for a few
weeks to a few months.
Page 3


El Nino
LA Nina
Indian Ocean Dipole Ocean Dipole
El Nino
?El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of
?When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly
?El Niño normally occurs
around Christmas
weeks to a few months.
El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of Ecuador and Peru.
When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly reduced.
El Niño normally occurs
Christmas and usually lasts for a few
weeks to a few months.
Normal
Conditions
? In a normal year, a surface
the region of northern Australia
a high pressure
result, the trade winds
strongly from east to west.
? The easterly flow of the trade winds carries warm
surface waters
storms (thunderstorms)
Australia. Along the coast of Peru, cold bottom
nutrient rich water wells up
the warm water that is pulled to the west.
In a normal year, a surface low pressure develops in
northern Australia and Indonesia and
high pressure system over the coast of Peru. As a
trade winds over the Pacific Ocean move
east to west.
The easterly flow of the trade winds carries warm
surface waters westward, bringing convective
storms (thunderstorms) to Indonesia and coastal
Australia. Along the coast of Peru, cold bottom cold
water wells up to the surface to replace
the warm water that is pulled to the west.
Page 4


El Nino
LA Nina
Indian Ocean Dipole Ocean Dipole
El Nino
?El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of
?When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly
?El Niño normally occurs
around Christmas
weeks to a few months.
El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of Ecuador and Peru.
When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly reduced.
El Niño normally occurs
Christmas and usually lasts for a few
weeks to a few months.
Normal
Conditions
? In a normal year, a surface
the region of northern Australia
a high pressure
result, the trade winds
strongly from east to west.
? The easterly flow of the trade winds carries warm
surface waters
storms (thunderstorms)
Australia. Along the coast of Peru, cold bottom
nutrient rich water wells up
the warm water that is pulled to the west.
In a normal year, a surface low pressure develops in
northern Australia and Indonesia and
high pressure system over the coast of Peru. As a
trade winds over the Pacific Ocean move
east to west.
The easterly flow of the trade winds carries warm
surface waters westward, bringing convective
storms (thunderstorms) to Indonesia and coastal
Australia. Along the coast of Peru, cold bottom cold
water wells up to the surface to replace
the warm water that is pulled to the west.
Page 5


El Nino
LA Nina
Indian Ocean Dipole Ocean Dipole
El Nino
?El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of
?When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly
?El Niño normally occurs
around Christmas
weeks to a few months.
El Niño is the name given to the occasional
development of warm ocean surface waters
along the coast of Ecuador and Peru.
When this warming occurs the usual
upwelling of cold, nutrient rich deep ocean
water is significantly reduced.
El Niño normally occurs
Christmas and usually lasts for a few
weeks to a few months.
Normal
Conditions
? In a normal year, a surface
the region of northern Australia
a high pressure
result, the trade winds
strongly from east to west.
? The easterly flow of the trade winds carries warm
surface waters
storms (thunderstorms)
Australia. Along the coast of Peru, cold bottom
nutrient rich water wells up
the warm water that is pulled to the west.
In a normal year, a surface low pressure develops in
northern Australia and Indonesia and
high pressure system over the coast of Peru. As a
trade winds over the Pacific Ocean move
east to west.
The easterly flow of the trade winds carries warm
surface waters westward, bringing convective
storms (thunderstorms) to Indonesia and coastal
Australia. Along the coast of Peru, cold bottom cold
water wells up to the surface to replace
the warm water that is pulled to the west.
Walker
circulation
(Occurs during
Normal Y ears)