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首页> 外文期刊>Polar biology >Biogenic volatile organic compound emissions in four vegetation types in high arctic Greenland
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Biogenic volatile organic compound emissions in four vegetation types in high arctic Greenland

机译：北极高地格陵兰四种植被类型的生物挥发性有机化合物的生物排放

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摘要

Biogenic volatile organic compounds (BVOCs) emitted from terrestrial vegetation participate in oxidative reactions in the atmosphere, leading to the formation of secondary organic aerosols and longer lifetime of methane. Global models of BVOC emissions have assumed minimal emissions from the high latitudes. However, measurements from this region are lacking, and studies from the high arctic are yet to be published. This study aimed to obtain estimates for BVOC emissions from the high arctic, and hereby to add new knowledge to the understanding of global BVOC emissions. Measurements were conducted in four vegetation types dominated by Cassiope tetragona, Salix arctica, Vaccinium uliginosum and a mixture of Kobresia myosuroides, Dryas spp. and Poa arctica. Emissions were measured by an enclosure technique and collection of volatiles into adsorbent cartridges in August. Volatiles were analyzed by gas chromatography-mass spectrometry following thermal desorption. Isoprene showed highest emissions in S. arctica heath. Monoterpene and sesquiterpene emissions were especially associated with C. tetragona heath. Total observed emissions were comparable in magnitude to emissions previously found in the subarctic, whereas isoprene emissions were lower. This study shows that considerable amounts of BVOCs are emitted from the high arctic. The results are also of importance as the emissions from this region are expected to increase in the future as a result of the predicted climate warming in the high arctic. We suggest further studies to assess the effects of climate changes in the region in order to gain new knowledge and understanding of future global BVOC emissions.
机译：陆地植被排放的生物挥发性有机化合物（BVOC）参与大气中的氧化反应，导致形成二次有机气溶胶并延长甲烷的寿命。 BVOC排放的全球模型假设高纬度的排放量最小。但是，缺乏该地区的测量数据，有关北极高地的研究尚未发表。这项研究旨在获得北极高海拔地区BVOC排放量的估算值，从而为全球BVOC排放量的了解增加新的知识。在四类植被中进行了测量，这些类型以四角形仙后草，柳柳，越桔越桔和小嵩草（Kobresia myosuroides）的混合物（Dryas spp）为主。和Poa arctica。通过封闭技术测量排放，并于八月将挥发物收集到吸附剂盒中。热解吸后，通过气相色谱-质谱法分析挥发物。异戊二烯在北极链球菌荒地中显示出最高的排放量。单萜和倍半萜的排放尤其与四面体的健康有关。观测到的总排放量与先前在亚弧中发现的排放量相当，而异戊二烯的排放量较低。这项研究表明，高北极地区会排放出大量的BVOC。结果也很重要，因为由于北极地区预计的气候变暖，预计该地区的排放量将来会增加。我们建议进行进一步的研究，以评估该地区气候变化的影响，以便获得新知识和对未来全球BVOC排放的了解。

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  • 来源
    《Polar biology》 |2014年第2期|237-249|共13页
  • 作者

    Michelle Schollert; Sebrina Burchard; Patrick Faubert; Anders Michelsen; Riikka Rinnan;

  • 作者单位

    Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen O,Denmark,Department of Geoscience and Natural Resource Management,Center for Permafrost (CENPERM), University of Copenhagen,Oster Voldgade 10, 1350 Copenhagen K, Denmark;

    Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen O,Denmark;

    Chaire en Eco-conseil, Departement des Sciences Fondamentales, Universite du Quebec a Chicoutimi, 555,boulevard de I'Universite, Chicoutimi, QC G7H 2B1, Canada;

    Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen O,Denmark,Department of Geoscience and Natural Resource Management,Center for Permafrost (CENPERM), University of Copenhagen,Oster Voldgade 10, 1350 Copenhagen K, Denmark;

    Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen O,Denmark,Department of Geoscience and Natural Resource Management,Center for Permafrost (CENPERM), University of Copenhagen,Oster Voldgade 10, 1350 Copenhagen K, Denmark;

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  • 正文语种 eng
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  • 关键词

    Biogenic volatile organic compounds; VOC; Isoprene; Monoterpene; Sesquiterpene; Arctic ecosystems;

    机译：生物挥发性有机化合物;VOC;异戊二烯;单萜;倍半萜烯;北极生态系统;

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