气候变化致热带雨带向两极移动数十亿人或面临“粮食危机”

预约免费课程

预约免费试听课程

预约报名领取礼包

当前位置：首页 > 时文闯关 > 气候变化致热带雨带向两极移动数十亿人或面临“粮食危机”

困难

难度

议论文

时文类型

世界与环境

时文话题

高三

适合年级

时文录音

FLASH 需要跟新播放音频您需要升级 Flash 插件.

闯关习题描述一下时文录音

By 2100, billions of people are at risk of facing more flooding, higher temperatures and less food and water. A new study found that the climate change will cause the Earth’s tropical rain belt to shift in areas that cover almost two-thirds of the world, potentially threatening environmental safety and food security for billions of people.

The tropical rain belt is a narrow area that circles the Earth near the equator where trade winds(信风) from the Northern and Southern hemispheres meet. Areas along the equator are among the warmest on Earth, and this, paired with the winds, creates significant humidity(湿热) and precipitation.

“Our work shows that climate change will cause the position of Earth’s tropical rain belt to move in opposite directions in two longitudinal(经度的) sectors that cover almost two thirds of the globe,” lead author Antonios Mamalakis said, “a process that will have chain effects on water availability and food production around the world.”

In a video, Mamalakis explained the belt will likely shift between 2075 and 2100. This will likely result in “increased drought stress over Madagascar and intensified flooding over southern India,” Mamalakis said. Madagascar is already seeing the devastating impacts of continuous drought. Half of the region’s population has been impacted by several years of drought, and many families have been forced to live off of eating insects. The area has the 10th highest rate of stunting in the world, with almost half of Madagascar’s children under five years old suffering from malnutrition(营养不良).

Greenhouse gas emissions play a significant role in climate change, as it traps heat radiating from the sun. Fellow researcher James Randerson said the effects of this will be felt “faster” in certain areas, including Asia. The researchers have said that with this information, the next step is to figure out more specifically how these changes will impact natural disasters, infrastructure(基础设施) and ecosystems, and what changes need to be made to policy and management.

请先登录