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Weather

Basics

Worksheet: El Nino / La Nina

Sheet 3: Weather without El Nino influence

You have already heard a lot about El Niño and his sister in the previous text.

El Niño turns up in the Pacific ocean and has effects far beyond that region.

What is the normal weather situation without El Niño in the pacific ocean?

Exercise:
Look at the following map and describe the situation
without El Niño influence.

The Pacific, pressure system and ocean currents, normal conditions
map by design agency "Zur Gestaltung-Nürnberg", modified by Julia Heres

Numbers in the map above

1: Northern Tropic (23,5°N)
2: Southern Tropic (23,5°S)
3: North America (Mexico), and off shore: cold California stream (white arrows)
4: South America (Peru), and off shore: cold Humboldt stream (white arrows)
5: High Pressure over the Easter Islands

Look at the map above.

What is correct?

1) Air pressure in the eastern part of the Pacific is ...

a) relatively high.
b) relatively low.
c) the same as in the western part.
d) the same as in the Caribbean.

2) The high pressure area over the Easter Islands is ...

a) destabilised by the warm ocean stream off the Chilean and Peruvian coast.
b) stabilised by the warm ocean stream off the Chilean and Peruvian coast.
c) destabilised by the cold ocean stream off the Chilean and Peruvian coast.
d) stabilised by the cold ocean stream off the Chilean and Peruvian coast.

3) Air pressure over Australia and South East Asia is ...

a) relatively low.
b) relatively high.
c) the same as in the eastern part.
d) the same as over Hawaii.

See next page for a different graphic presentation.

About this page:

- Author: Dr. Schrettenbrunner - University of Nürnberg - Germany
- scientific reviewing:
- educational reviewing: Dr. Yvonne Schleicher , Julia Heres
- last update: 08.09.03