从地球和太空中监测泥炭地
文章来源:未知 文章作者:meng 发布时间:2010-01-26 03:25 字体: [ ]  进入论坛
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A team of UK scientists led by Dr. Karen Anderson (University of Exeter) has developed a new technique for monitoring the condition of peatlands泥炭地. The team used a combination of images captured from Earth and space to measure spatial1 patterning空间格局,空间形态 in peatland surfaces as an indicator2 of their condition. This new method uses a novel新奇的,异常的 coupled approach, using satellite images from space and airborne空运的,凤媒的 laser scanning data, and has resulted in improved peatland mapping products. This new method could help monitor the damage that is being done to peatlands through human activity. Such disruption分裂,破坏 is contributing to有助于 global warming, as peatlands can release the carbon they absorb吸收 and store if they are damaged by drainage排水 or peat泥煤 extraction processes. This research, which appears in the January-February 2010 issue of Journal of Environmental Quality, reports that airborne laser scanning instruments are capable of measuring fine-scale peatland structures such as hummocks山岗,小丘 and hollows that typically measure less than four meters in size.

Lowland rainfed peatlands are recognized as being a globally important environmental resource because they absorb and store carbon. Their unique plant communities and their inherent固有的,内在的 wetness control their ability to act as carbon stores, but when human disturbance4 disrupts their surface structure, greenhouse gases are released instead. Many peatlands across the world are affected5 by drainage, peat removal and ecological6 disturbance干扰,骚乱 so scientists have been working to develop a robust7 spatial空间的 method for monitoring peatland condition. Remote sensing techniques (where images from satellites in space are analyzed) provide a likely route for this.

The research team used data from an airborne "LiDAR," a laser-scanning instrument, alongside data from the IKONOS satellite. They showed that when LiDAR data were combined with optical images collected from satellites, a powerful method for spatial mapping of peatland quality could be achieved. The paper shows how use of a structural8-based approach improved capabilities9 for mapping and monitoring peatland condition with an improvement in accuracy from 71.8% (without structural estimates) to 88.0% when airborne LiDAR data (which had been spatially10 preprocessed using a technique called semivariogram半方差图 analysis) were used. This new approach offers an improved, physically11 based method for automated12 peatland condition mapping.

As Dr. Anderson, who led the study, noted13, "This work is the first to demonstrate that peatland structures, which are linked to hydrological水文学的 status and condition, can be measured using remote sensing techniques. Our approach enabled us to draw out the differences in surface pattern across the peatland and resulted in an improved mapping product which is useful for scientists, peatland managers, statutory法定的,法令的 conservation agencies, and for policy makers14."



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1 spatial gvcww     
adj.空间的,占据空间的
参考例句:
  • This part of brain judges the spatial relationship between objects.大脑的这部分判断物体间的空间关系。
  • They said that time is the feeling of spatial displacement.他们说时间是空间位移的感觉。
2 indicator i8NxM     
n.指标;指示物,指示者;指示器
参考例句:
  • Gold prices are often seen as an indicator of inflation.黃金价格常常被看作是通货膨胀的指标。
  • His left-hand indicator is flashing.他左手边的转向灯正在闪亮。
3 hummocks 58eb27f03a91d04270c63ee25bf89b00     
n.小丘,岗( hummock的名词复数 )
参考例句:
  • Interesting hummocks swirls and are found on the surface of the landslide. 在山体滑坡的表面,我们能够看到有趣的山包,盘绕的丘陵和悬崖。 来自互联网
4 disturbance BsNxk     
n.动乱,骚动;打扰,干扰;(身心)失调
参考例句:
  • He is suffering an emotional disturbance.他的情绪受到了困扰。
  • You can work in here without any disturbance.在这儿你可不受任何干扰地工作。
5 affected TzUzg0     
adj.不自然的,假装的
参考例句:
  • She showed an affected interest in our subject.她假装对我们的课题感到兴趣。
  • His manners are affected.他的态度不自然。
6 ecological IrRxX     
adj.生态的,生态学的
参考例句:
  • The region has been declared an ecological disaster zone.这个地区已经宣布为生态灾难区。
  • Each animal has its ecological niche.每种动物都有自己的生态位.
7 robust FXvx7     
adj.强壮的,强健的,粗野的,需要体力的,浓的
参考例句:
  • She is too tall and robust.她个子太高,身体太壮。
  • China wants to keep growth robust to reduce poverty and avoid job losses,AP commented.美联社评论道,中国希望保持经济强势增长,以减少贫困和失业状况。
8 structural itXw5     
adj.构造的,组织的,建筑(用)的
参考例句:
  • The storm caused no structural damage.风暴没有造成建筑结构方面的破坏。
  • The North American continent is made up of three great structural entities.北美大陆是由三个构造单元组成的。
9 capabilities f7b11037f2050959293aafb493b7653c     
n.能力( capability的名词复数 );可能;容量;[复数]潜在能力
参考例句:
  • He was somewhat pompous and had a high opinion of his own capabilities. 他有点自大,自视甚高。 来自辞典例句
  • Some programmers use tabs to break complex product capabilities into smaller chunks. 一些程序员认为,标签可以将复杂的功能分为每个窗格一组简单的功能。 来自About Face 3交互设计精髓
10 spatially ca2278711fa6d1d851ea605dea2e8224     
空间地,存在于空间地
参考例句:
  • A well-defined array of stable fringes results and the field is spatially coherent. 结果得到一组完全确定的稳定条纹,而光场是空间相干的。
  • The units are collaged together by a serial tectonic spatially and temporally. 这些构造单元是由构造原因,依一定的时空序列拼贴在一起的。
11 physically iNix5     
adj.物质上,体格上,身体上,按自然规律
参考例句:
  • He was out of sorts physically,as well as disordered mentally.他浑身不舒服,心绪也很乱。
  • Every time I think about it I feel physically sick.一想起那件事我就感到极恶心。
12 automated fybzf9     
a.自动化的
参考例句:
  • The entire manufacturing process has been automated. 整个生产过程已自动化。
  • Automated Highway System (AHS) is recently regarded as one subsystem of Intelligent Transport System (ITS). 近年来自动公路系统(Automated Highway System,AHS),作为智能运输系统的子系统之一越来越受到重视。
13 noted 5n4zXc     
adj.著名的,知名的
参考例句:
  • The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
  • Jim is noted for arriving late for work.吉姆上班迟到出了名。
14 makers 22a4efff03ac42c1785d09a48313d352     
n.制造者,制造商(maker的复数形式)
参考例句:
  • The makers of the product assured us that there had been no sacrifice of quality. 这一产品的制造商向我们保证说他们没有牺牲质量。
  • The makers are about to launch out a new product. 制造商们马上要生产一种新产品。 来自《简明英汉词典》
TAG标签: airborne peatland peat
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