印度中部植被火灾造成的温室气体排放估算

Tapas Ray, Dinesh Malasiya, J. A. Dar, P. Khare, M. L. Khan, S. Verma, Arun Dayanandan
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引用次数: 8

摘要

生物多样性丧失与气候变化之间的相互作用给科学研究、政策制定和生态系统过程管理带来了重大挑战。由于大气中温室气体浓度的增加,植被火灾释放的温室气体已被确定为全球变暖和气候变化背景下的一个关键环境问题。在印度,植被燃烧主要发生在旱季,对空气和土壤质量造成各种负面环境影响。本研究通过使用基于modis的燃烧面积图、基于陆地卫星的土地覆盖图、生物识别模型和预先存在的数据集来估计印度中部植被火灾造成的温室气体排放。温室气体排放量计算为燃烧面积、单位面积生物质负荷、燃烧因子和排放因子的乘积。结果表明:2002 - 2016年间,火灾数量和燃烧面积显著增加,MODIS火灾数量从720起增加到3165起;燃烧面积和温室气体排放之间的强烈相关性使得一旦燃烧面积被量化,就可以准确估计排放。植被火灾周期的这些变化对景观和区域一级的森林组成和结构有重要影响,与保护生物多样性有关的森林管理人员应把维持这种自然变化作为目标。这些结果表明,持续的植被火灾将对全球碳排放产生更大的影响,并降低森林生物多样性。在过去的几十年里,火灾排放量一直在增加,并且由于气候变化引起的火灾预测变化,可能会保持高水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Estimation of Greenhouse Gas Emissions from Vegetation Fires in Central India
Interactions between biodiversity loss and climate change pose significant challenges for scientific research, policy-making, and the management of ecosystem processes. Greenhouse gases released from vegetation fires have been identified as a key environmental issue within the context of global warming and climate change due to increasing concentrations of greenhouse gases in the atmosphere. Occurring mostly during the dry season in India, the burning of vegetation causes a variety of negative environmental impacts on air and soil quality. The present study estimates greenhouse gas emissions caused by vegetation fires in Central India through the use of MODISbased burnt area maps, Land sat-based land cover maps, biometric models, and pre-existing datasets. Greenhouse gas emissions were calculated as the product of area burnt, biomass loading per unit area, combustion factor, and emission factor. The results indicate that the number of fires and burnt areas increased significantly between 2002 and 2016, MODIS fire counts increased from 720 to 3165 between 2002 and 2016. A strong correlation between area burnt and greenhouse gas emissions allowed for accurate emissions estimates once area burnt was quantified. These variations in vegetation fire cycles have an important influence on forest composition and structure at the landscape and regional levels, and maintenance of this natural variability should be targeted by forest managers concerned with biodiversity conservation. These results indicate that continued vegetation fires will produce a greater impact on global carbon emissions and reduce forest biodiversity. Fire emissions have been increasing over the past decades and are likely to remain high due to forecasted changes in fire caused by climate change.
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