官方APP下载:英语学习播客(支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号(英语全能特训)
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

Experts: El Nino Could Be the Strongest on Record

作者:Jonathan Evans 发布日期:11-16-2015

El Nino
El Nino

Weather experts say this year could be one of the strongest El Nino events in recorded history.

Experts say El Nino could mean severe weather conditions in many parts of the world. In eastern Africa, for example, Kenya and Uganda are preparing for possible flooding. Yet two countries further south, South Africa and Malawi, are already dealing with extremely dry weather.

El Nino is Spanish for "the child." It usually begins in December, near the celebration of the birth of Jesus Christ. In fact, the weather event was named in his honor.

El Nino develops when winds off the west coast of South America weaken. This permits warm water in the western Pacific to expand toward the east and the Americas. At the same time, clouds and rain over the warm water move east, too.

El Nino conditions normally appear only about two times every 10 years. Usually, El Nino conditions continue for about 12 to 18 months. They bring warm weather to some areas. These areas become wetter than normal, while others become drier.

The United Nations Children's Fund warns that many people are at risk from hunger, disease and water shortages resulting from El Nino. In east and southern Africa, it warns, up to 11-million children could be affected.

East African countries usually receive heavy rainfall during an El Nino. Southern Africa usually has little rainfall, which may lead to wildfires or drought conditions.

Onesmus Ruirie is a weather expert with the Kenya Meteorological Department. He explains how these different weather events can result.

"What happens is that during an El Nino, the weather pattern changes. And for East Africa, we have a very warm equatorial Indian Ocean. And if the Indian Ocean is very warm due to evaporation of the ocean water, we have that water blown to the continental East Africa. And that is why you have a lot of rain in East Africa. But to the south, that denies them the moisture. So that tends to be dry in the southern Africa."

Weather changes caused by El Nino depend on the strength of the condition. In the early 1980s, a strong El Nino was linked to dry weather in Australia and Asia, rain and flooding in South America and high temperatures in much of the United States. Ten years later, a smaller El Nino caused trouble in parts of the U.S. It was linked to severe floods in the Southeast and the Middle West.

Tom Di Leberto is a meteorologist at the National Oceanic and Atmospheric Administration in Washington, D.C. He says this year could be the third strongest El Nino on record. But, we will not know for sure until early 2016 when all the weather records are examined.

I'm Jonathan Evans.

Jonathan Evans wrote this story for Learning English with additional reporting from Jill Craig. George Grow was the editor.

Words in This Story

moisture - n. a small amount of a liquid (such as water) that makes something wet or moist

版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏公网安备 32010202011039号苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台