气候变化会导致阿拉斯加野火频率增加
文章来源:未知 文章作者:enread 发布时间:2016-05-12 07:54 字体: [ ]  进入论坛
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Climate change is melting glaciers1, reducing sea-ice cover and increasing wildlife activity - with some of the most dramatic impacts occurring in the northern high latitudes2. New research by University of Montana affiliate3 scientist Adam Young and UM fire ecology Associate Professor Philip Higuera projects an increased probability of fires occurring in Alaskan boreal forest and tundra4 under a warmer, drier climate. Their work recently was published in the journal Ecography.
 
The paper titled "Climatic thresholds shape northern high-latitude fire regimes and imply vulnerability to future climate change" is available online at http://onlinelibrary.wiley.com/doi/10.1111/ecog.02205/abstract.
 
Young, also a doctoral candidate at the University of Idaho, projects that by the end of this century the probability of burning in many high-latitude ecosystems5 in Alaska will be up to four times higher than seen in recent decades. Tundra and the forest-tundra boundary, which have not burned often in the past, are particularly sensitive to projected changes in temperature and moisture. "We looked at the location of wildfires across Alaska during the past 60 years and, not surprisingly, found that they were most common in regions with warm, dry summers," Young said. "The more interesting result of our work is the emergence6 of a distinct temperature threshold that separates areas that have and have not burned in recent decades. Above this threshold, we see a sharp increase in the likelihood that a fire will occur in a region."
 
The research highlights that regions crossing this temperature threshold as a result of climate change are the most vulnerable to increased burning.


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1 glaciers e815ddf266946d55974cdc5579cbd89b     
冰河,冰川( glacier的名词复数 )
参考例句:
  • Glaciers gouged out valleys from the hills. 冰川把丘陵地带冲出一条条山谷。
  • It has ice and snow glaciers, rainforests and beautiful mountains. 既有冰川,又有雨林和秀丽的山峰。 来自英语晨读30分(高一)
2 latitudes 90df39afd31b3508eb257043703bc0f3     
纬度
参考例句:
  • Latitudes are the lines that go from east to west. 纬线是从东到西的线。
  • It was the brief Indian Summer of the high latitudes. 这是高纬度地方的那种短暂的晚秋。
3 affiliate TVBzj     
vt.使隶(附)属于;n.附属机构,分公司
参考例句:
  • Our New York company has an affiliate in Los Angeles.我们的纽约公司在洛杉矶有一个下属企业。
  • What is the difference between affiliate and regular membership?固定会员和附属会员之间的区别是什么?
4 tundra dmtwW     
n.苔原,冻土地带
参考例句:
  • The arctic tundra is at the top of the world around the North Pole.北极冻原是指北极点周边的地区,是世界最高的地方。
  • There is a large amount of methane gas under the Siberian tundra.西伯利亚的冻土地带之下有大量的甲烷气体。
5 ecosystems 94cb0e40a815bea1157ac8aab9a5380d     
n.生态系统( ecosystem的名词复数 )
参考例句:
  • There are highly sensitive and delicately balanced ecosystems in the forest. 森林里有高度敏感、灵敏平衡的各种生态系统。 来自《简明英汉词典》
  • Madagascar's ecosystems range from rainforest to semi-desert. 马达加斯加生态系统类型多样,从雨林到半荒漠等不一而足。 来自辞典例句
6 emergence 5p3xr     
n.浮现,显现,出现,(植物)突出体
参考例句:
  • The last decade saw the emergence of a dynamic economy.最近10年见证了经济增长的姿态。
  • Language emerges and develops with the emergence and development of society.语言是随着社会的产生而产生,随着社会的发展而发展的。
TAG标签: forest climate Alaska
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