豆搜网 文档下载 文档下载导航
设为首页 | 加入收藏
搜索 请输入内容:  
 导航当前位置: 文档下载 > 所有分类 > 高中教育 > 高考 > 【2014】高考英语阅读理解巩固精品题练习(47)及答案
侵权投诉

【2014】高考英语阅读理解巩固精品题练习(47)及答案

【2014】高考英语阅读理解巩固精品题练习(47)及答案

2014高考英语阅读理解巩固练习精品题(47)及答案

【江苏省常州市2013冲刺模拟】C

Scientists have long understood the key role that oceans play in regulating the Earth’s climate. Oceans cover 70 percent of the globe and store a thousand times more heat than the atmosphere does. What’s newer is the understanding of how this key component of our climate system responds to global warming.

A brake on global warming—for now

One of the ocean’s most important climate functions is absorbing heat and carbon dioxide (CO2), one of the gases that cause global warming. Acting as a heat sponge, the oceans have absorbed huge amounts of heat and CO2 in the last forty years.

Fujita explains that “the oceans are saving us from faster climate change—they are a big flywheel that delays rapid overheating of the earth, putting a brake on the climate system.”

“That’s the good news,” he adds. “The bad news is that the oceans only slow the atmospheric warming. Once the oceans come to balance with a greenhouse-gas warmed earth, the extreme heat will remain in the atmosphere and things will get much hotter.” But where and how the oceans release this accumulated heat is uncertain. And as the ocean stores heat, fragile underwater ecosystems are struggling.

The most recent scientific report from the Intergovernmental Panel on Climate Change (IPCC) also notes with concern that the ocean is acidifying because of increased absorption of atmospheric CO2, and thus causing a threat for shell-forming species. Sharp increases in carbon dioxide levels will cause further acidification of the ocean. Currents distributing heat

Another important role the oceans play is that of distributor. Oceans deliver heat and life-sustaining nutrients around the globe. Just as blood vessels bring oxygen and nutrients to cells in the human body, the ocean’s currents carry oxygen, nutrients and heat throughout the Earth. The ocean distributes 25 to 50 percent of the energy the planet receives from the sun. For example, the Gulf Stream carries heat across the Atlantic. This warm current gives northwestern Europe a milder climate than it would

第1页

你可能喜欢

  • 高中定语从句讲解
  • 高中英语名词性从句练习题
  • 情态动词虚拟语气
  • 江苏省高考英语模拟
  • 高中非谓语练习
  • 高考英语单项选择
  • 高考英语语法复习资料
  • 高考分类汇编

热门文档

相关文档

站点地图 | 侵权投诉 | 手机版
新浪认证  诚信网站  绿色网站  可信网站   非经营性网站备案
本站所有资源均来自互联网,本站只负责收集和整理,均不承担任何法律责任,如有侵权等其它行为请联系我们.
文档下载 Copyright 2013 doc.docsou.com All Rights Reserved.  手机版 email
返回顶部