Author Question: Describe the source and effects of an El Nio event. What will be an ideal ... (Read 77 times)

james0929

  • Hero Member
  • *****
  • Posts: 586
Describe the source and effects of an El Nio event.
   
  What will be an ideal response?

Question 2

Explain two ways in which human activity increases the danger of drought and desertification.
   
  What will be an ideal response?



ntsoane kedibone

  • Sr. Member
  • ****
  • Posts: 333
Answer to Question 1

ANSWER: In an El Nio event, trade winds across the Pacific weaken and warm, shallow water accumulates at the eastern edge of the Pacific along the coast of South America. The event brings abnormally heavy rainfall to the western coast of the Americas from California to Peru. Australia, Indonesia, and southeast Asia experience drier than normal conditions that increase the danger of drought and wildfires. The event can affect global weather patterns.
A successful answer will
- identify the source of the event as a buildup of abnormally warm water along the coast of South America,
- identify increased rainfall along the eastern side of the Pacific as an effect, and
- identify increased drought in the western Pacific as an effect.

Answer to Question 2

ANSWER:
A successful answer will include two of the following:
- damming of rivers or increased use of water upstream reduces soil moisture downstream.
- overgrazing by livestock or wildlife, concentrated in an area by fencing or artificial water sources, breaks up soil, compacts deeper soil, and reduces water infiltration.
- cultivation decreases soil moisture by exposing more soil to heat and air.
- topsoil disturbed by cultivation can dry and blow away, exposing deeper soils to evaporative processes.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

For a complete list of videos, visit our video library