热带稀树草原碳管理项目必须考虑气候变化因素,以避免适应不良:澳大利亚北领地顶端西部空气污染恶化的案例

IF 1.2 4区 环境科学与生态学 Q4 ECOLOGY
Rangeland Journal Pub Date : 2024-03-28 DOI:10.1071/rj23049
David M. J. S. Bowman, Nicolas Borchers-Arriagada, Andrew Macintosh, Donald W. Butler, Grant J. Williamson, Fay H. Johnston
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引用次数: 0

摘要

热带稀树草原火灾是全球温室气体(GHG)和微粒污染的主要来源。自 2006 年年中以来,澳大利亚政府的一项碳抵消计划激励北部地区的土地管理者在旱季初期进行热带稀树草原燃烧,以减少旱季后期的野火及相关温室气体排放。本研究的重点是解决人们对热带稀树草原燃烧碳减排项目导致达尔文市空气污染恶化的担忧。自 20 世纪 60 年代以来重建的 2.5 μm(PM2.5)颗粒物日浓度显示,自 2000 年代以来,旱季初期(5 月、6 月、7 月)的 PM2.5 有所恶化,旱季后期(8 月、9 月、10 月)有所改善,但整个旱季的总体差异不大。达尔文的遥感 PM2.5 估计值与整个地区在旱季初期的 PM2.5 估计值相关。对 2002 年以来的燃烧面积和火灾强度进行的遥感分析表明,热带稀树草原碳项目将燃烧转移到了早旱季,与非项目地区相比,造成了火灾强度的增加。火灾强度的增加似乎与燃料湿度急剧下降以及碳项目区的管理影响有关,这可能削弱了热带稀树草原燃烧项目在减少温室气体排放方面的功效。需要对澳大利亚和世界其他地方热带稀树草原燃烧碳减排的基本假设进行更全面的评估,以避免适应不良,如过度信用、烟雾污染和其他环境危害。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Climate change must be factored into savanna carbon- management projects to avoid maladaptation: the case of worsening air pollution in western Top End of the Northern Territory, Australia

Savanna fires are a major source of greenhouse gas (GHG) and particulate pollution globally. Since mid-2006, an Australian Government carbon offset program has incentivised Northern Territory land managers to undertake early dry-season savanna burning with the aim of reducing late dry-season wildfires and associated GHG emissions. The focus of this study is addressing concern that savanna burning carbon abatement projects are causing worsening air pollution in the city of Darwin. Reconstructed concentrations of daily particulate matter of <2.5 μm (PM2.5) since the 1960s showed since 2000s a worsening in PM2.5 in the early dry season (May, June, July), some improvement in the late dry season (August, September, October) with little overall difference for the whole dry season. Remote-sensing PM2.5 estimates in Darwin were correlated with region-wide PM2.5 estimates during the early dry season. Remote-sensing analysis of area burned and intensity of fires since 2002 showed that savanna carbon projects have shifted burning to the early dry season and caused increases in fire intensity compared with non-project areas. Increased fire intensity appears to follow sharply declining fuel moisture, as well as management effects on carbon project areas, which have possibly undermined the efficacy of savanna burning projects in reducing GHG emissions. More thorough evaluation of underlying assumption of savanna burning carbon abatement in Australia and elsewhere in the world is required to avoid maladaptation, such as over-crediting, smoke pollution, and other environmental harms.

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来源期刊
Rangeland Journal
Rangeland Journal 环境科学-生态学
CiteScore
2.90
自引率
8.30%
发文量
14
审稿时长
>36 weeks
期刊介绍: The Rangeland Journal publishes original work that makes a significant contribution to understanding the biophysical, social, cultural, economic, and policy influences affecting rangeland use and management throughout the world. Rangelands are defined broadly and include all those environments where natural ecological processes predominate, and where values and benefits are based primarily on natural resources. Articles may present the results of original research, contributions to theory or new conclusions reached from the review of a topic. Their structure need not conform to that of standard scientific articles but writing style must be clear and concise. All material presented must be well documented, critically analysed and objectively presented. All papers are peer-reviewed. The Rangeland Journal is published on behalf of the Australian Rangeland Society.
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