全球變暖之-全球變暖概述1(雙語(yǔ))
  聲明:本文圖片內(nèi)容來(lái)自與互聯(lián)網(wǎng)絡(luò),旨在調(diào)節(jié)視覺疲勞,如" />
 新托福考試網(wǎng)
 考試資訊  報(bào)考指南  備考寶典  考場(chǎng)經(jīng)驗(yàn)  閱讀輔導(dǎo)  真題  模擬題   學(xué)友圈   精品網(wǎng)校課程
   聽力 | 寫作 | 閱讀 | 口試   北京新航道托福精品課程   環(huán)球雅思托福熱門課程   新東方托福網(wǎng)絡(luò)課程   啟德托福   托福考試答疑區(qū)

全球變暖百科詳述:全球變暖概述(1)

作者:不詳   發(fā)布時(shí)間:2009-12-29 16:00:43  來(lái)源:網(wǎng)絡(luò)
  • 文章正文
  • 網(wǎng)校課程
  • 資料下載
  • 熱門話題
  • 論壇
  KEYWORDS:全球變暖
  全球變暖之-全球變暖概述1(雙語(yǔ))
  聲明:本文圖片內(nèi)容來(lái)自與互聯(lián)網(wǎng)絡(luò),旨在調(diào)節(jié)視覺疲勞,如有版權(quán)問(wèn)題,請(qǐng)致電告知。本文英文閱讀文本內(nèi)容來(lái)自于國(guó)外英文門戶以及資訊資料網(wǎng)站,可能有超語(yǔ)法類的常用正確表達(dá),請(qǐng)大家仔細(xì)審閱,注意甄別。
  全球變暖指的是在一段時(shí)間中,地球的大氣和海洋溫度上升的現(xiàn)象,主要是指人為因素造成的溫度上升。原因很可能是由于溫室氣體排放過(guò)多造成。
  Global warming is the increase in the average temperature of the Earth’s near-surface air and oceans since the mid-20th century and its projected continuation. Global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) between the start and the end of the 20th century.
  The Intergovernmental Panel on Climate Change (IPCC) concludes that most of the observed temperature increase since the middle of the 20th century was caused by increasing concentrations of greenhouse gases resulting from human activity such as fossil fuel burning and deforestation.The IPCC also concludes that variations in natural phenomena such as solar radiation and volcanism produced most of the warming from pre-industrial times to 1950 and had a small cooling effect afterward.These basic conclusions have been endorsed by more than 40 scientific societies and academies of science,including all of the national academies of science of the major industrialized countries.
  Climate model projections summarized in the latest IPCC report indicate that the global surface temperature will probably rise a further 1.1 to 6.4 °C (2.0 to 11.5 °F) during the twenty-first century.The uncertainty in this estimate arises from the use of models with differing sensitivity to greenhouse gas concentrations and the use of differing estimates of future greenhouse gas emissions.
  Some other uncertainties include how warming and related changes will vary from region to region around the globe. Most studies focus on the period up to the year 2100. However, warming is expected to continue beyond 2100 even if emissions stop, because of the large heat capacity of the oceans and the long lifetime of carbon dioxide in the atmosphere.
熱門資料下載:
新托福考試論壇熱貼:
【責(zé)任編輯:育路編輯  糾錯(cuò)
新托福培訓(xùn)咨詢電話:010-51294614
報(bào)考直通車
 
·新托福最近考試時(shí)間:2010年6月26日。
·考試內(nèi)容:閱讀、 聽力、口語(yǔ)、寫作。
課程推薦
                   
 新托福考試輔導(dǎo)
亚洲中国久久精品无码,国产大屁股视频免费区,一区二区三区国产亚洲综合,国产AV无码专区毛片
亚洲精品日产精品乱码不卡 | 亚洲中文字幕在线网 | 在线视频亚洲激情 | 日本精品三级视频 | 日本免费久久精品视频 | 亚洲AV第一页国产精品 |