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首页> 外文期刊>Environmental Science & Technology >Albedo Impact on the Suitability of Biochar Systems To Mitigate Global Warming
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Albedo Impact on the Suitability of Biochar Systems To Mitigate Global Warming

机译：反照率对生物炭系统缓解全球变暖的适用性的影响

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摘要

Biochar application to agricultural soils can change the surface albedo which could counteract the climate mitigation benefit of biochar systems. However, the size of this impact has not yet been quantified. Based on empirical albedo measurements and literature data of arable soils mixed with biochar, a model for annual vegetation cover development based on satellite data and an assessment of the annual development of surface humidity, an average mean annual albedo reduction of 0.05 has been calculated for applying 30-32 Mg ha"1 biochar on a test field near Bayreuth, Germany. The impact of biochar production and application on the carbon cycle and on the soil albedo was integrated into the greenhouse gas (GHG) balance of a modeled pyroJysis based biochar system via the computation of global wanning potential (GWP) characterization factors. The analysis resulted in a reduction of the overall climate mitigation benefit of biochar systems by 13-22% due to the albedo change as compared to an analysis which disregards the albedo effect Comparing the use of the same quantity of biomass in a biochar system to a bioenergy district heating system which replaces natural gas combustion, bioenergy heating systems achieve 99-119% of the climate benefit of biochar systems according to the model calculation.
机译：在农业土壤中使用生物炭可以改变地表反照率，这可能抵消生物炭系统在气候减缓方面的益处。但是，这种影响的大小尚未量化。基于经验反照率测量和可耕土壤与生物炭混合的文献数据，基于卫星数据的年度植被覆盖度发展模型和对表面湿度的年度发展评估，计算出平均年均反照率减少0.05，可用于在德国拜罗伊特附近的一个试验场上使用30-32 Mg ha“ 1生物炭。生物炭生产和应用对碳循环和土壤反照率的影响被整合到一个基于热解的生物炭系统的温室气体（GHG）平衡中通过计算全球变暖潜能（GWP）特征因子，与不考虑反照率效应的分析相比，由于反照率变化，该分析导致生物炭系统的总体气候减缓效益降低了13-22％。将生物炭系统中相同数量的生物质用于生物能源区域供热系统，以取代天然气燃烧，生物能源加热根据模型计算，该系统可实现生物炭系统气候收益的99-119％。

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  • 来源
    《Environmental Science & Technology》 |2012年第22期|12726-12734|共9页
  • 作者

    Sebastian Meyer; Ryan M. Bright; Daniel Fischer; Hardy Schulz; Bruno Glaser;

  • 作者单位

    Soil Biogeochemistry, Martin-Luther-University Halle-Wittenberg, Halle, Germany;

    Industrial Ecology Program, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTU), Trondheim, Norway;

    Soil Biogeochemistry, Martin-Luther-University Halle-Wittenberg, Halle, Germany;

    Soil Biogeochemistry, Martin-Luther-University Halle-Wittenberg, Halle, Germany;

    Soil Biogeochemistry, Martin-Luther-University Halle-Wittenberg, Halle, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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