永久冻土消融会加速全球变暖-凯发k8官网

永久冻土消融会加速全球变暖
文章来源:未知 文章作者:enread 发布时间:2014-04-09 07:05 字体: [ ] 
(单词翻译:双击或拖选)
a team of researchers lead by florida state university have found new evidence that permafrost(永久冻土) 2 is releasing large quantities of greenhouse gases into the atmosphere via plants, which could accelerate warming trends. the research is featured in the newest edition of the 3 of the national academy of sciences.
 
"we've known for a while now that permafrost is thawing," said suzanne hodgkins, the lead author on the paper and a doctoral student in chemical oceanography at florida state. "but what we've found is that the associated changes in plant community composition in the polar regions could lead to way more carbon being released into the atmosphere as 4(甲烷)."
 
permafrost is soil that is frozen year round and is typically located in polar regions. as the world has gotten slightly warmer, that permafrost is thawing and 5, which is producing increased amounts of methane.
 
relative to carbon dioxide, methane has a disproportionately large global warming potential. methane is 33 times more effective at warming earth on a mass basis and a century time scale relative to carbon dioxide.
 
as the plants break down, they are releasing carbon into the atmosphere. and if the permafrost melts 6, there would be five times the amount of carbon in the atmosphere than there is now, said jeff chanton, the john widmer winchester professor of oceanography at florida state.
 
"the world is getting warmer, and the additional release of gas would only add to our problems," he said.
 
chanton and hodgkins' work, "changes in peat chemistry associated with permafrost 1 increase greenhouse gas production," was funded by a three-year, $400,000 department of energy grant. they traveled to sweden multiple times to collect soil samples for the study.
 
the research is a multicontinent effort with researchers from north america, europe and australia all contributing to the work.


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1 fuyz5     
v.(使)融化,(使)变得友善;n.融化,缓和
参考例句:
  • the snow is beginning to thaw.雪已开始融化。
  • the spring thaw caused heavy flooding.春天解冻引起了洪水泛滥。
2 604d0753ea9b93ae6b1e926b72f6eda8     
n.熔化,融化v.(气候)解冻( thaw的现在分词 );(态度、感情等)缓和;(冰、雪及冷冻食物)溶化;软化
参考例句:
  • the ice is thawing. 冰在融化。 来自《现代英汉综合大词典》
  • it had been snowing and thawing and the streets were sloppy. 天一直在下雪,雪又一直在融化,街上泥泞不堪。 来自英汉文学 - 嘉莉妹妹
3 wk2zvx     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • he was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
4 t1eyx     
n.甲烷,沼气
参考例句:
  • the blast was caused by pockets of methane gas that ignited.爆炸是由数袋甲烷气体着火引起的。
  • methane may have extraterrestrial significance.甲烷具有星际意义。
5 f5b8fd5c51324ed24e58a14c223dc3da     
腐烂( decompose的现在分词 ); (使)分解; 分解(某物质、光线等)
参考例句:
  • the air was filled with the overpowering stench of decomposing vegetation. 空气中充满了令人难以忍受的腐烂植物的恶臭。
  • heat was obtained from decomposing manures and hot air flues. 靠肥料分解和烟道为植物提供热量。
6 entirely     
ad.全部地,完整地;完全地,彻底地
参考例句:
  • the fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
  • his life was entirely given up to the educational work. 他的一生统统献给了教育工作。
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