Satellite Monitoring of Anomalous Wildfires in Australia
Satellite Monitoring of Anomalous Wildfires in Australia
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DOI：
10.3389/feart.2020.617252
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发表时间：
2021-01-28
影响因子：
2.9
通讯作者：
Zima, Alla L.
中科院分区：
文献类型：
--
作者：
Bondur, Valery G.;Gordo, Kristina A.;Zima, Alla L.
在这里，我们介绍了2001-2020年期间对澳大利亚野火的卫星监测结果。基于卫星数据，分析了澳大利亚全境野火面积、CO和CO2含碳痕量气体排放的年度和月度动态。调查发现，2019-2020年火季期间，新南威尔士州境内发生异常火灾。烧毁地区的价值超过前几年的3.5-25.8倍。该区域含碳气体的年平均排放量超过了前几年的值，一氧化碳是前几年的4-59倍，二氧化碳是4.6-50倍。根据AIRS仪器(AQUA卫星)的月平均数据，记录了新南威尔士州野火CO过量浓度的空间分布。同时，利用TANSO-FTS(GOSAT卫星)数据估算了大气中的二氧化碳超额浓度。事实证明，澳大利亚这个州的火灾数量异常多，是由于极端干旱与异常高的地表温度、低降雨量和湿度有关，这为该地区普遍存在的桉树和热带雨林燃烧所产生的大火和含碳气体的排放创造了条件。
Here we present the results of satellite monitoring of wildfires in Australia for the period of 2001-2020. Annual and monthly dynamics of wildfire areas and CO and CO2 carbon-bearing trace gas emissions from wildfires have been analyzed for the whole territory of Australia based on satellite data. It was found that anomalous fires occurred in the territory of New South Wales during the 2019-2020 fire season. Values of burned-out areas exceeded the values of previous years 3.5-25.8-fold. Annual mean volumes of carbon-bearing gas emissions in this region exceeded the values of previous years 4-59-fold for carbon monoxide CO and 4.6-50-fold for carbon dioxide CO2. The spatial distribution of the excess concentrations of CO from wildfires in New South Wales was recorded according to the monthly mean data of the AIRS instrument (Aqua satellite). At the same time, the excess of CO2 concentration in the atmosphere was estimated using the TANSO-FTS (GOSAT satellite) data. It was demonstrated that an anomalously high number of fires in this state of Australia was caused by extreme drought associated with abnormally high surface temperatures, low rainfall and humidity which created conditions for intense fires and emissions of carbon-bearing gases associated with the combustion of eucalyptus and tropical rain forests prevailing in this region.