Application of remote sensing to understanding fire regimes and biomass burning emissions of the tropical Andes
Application of remote sensing to understanding fire regimes and biomass burning emissions of the tropical Andes
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DOI：
10.1002/2013gb004664
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发表时间：
2014-04
影响因子：
5.2
通讯作者：
I. Oliveras;L. Anderson;Y. Malhi
中科院分区：
文献类型：
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作者：
I. Oliveras;L. Anderson;Y. Malhi
在热带安第斯山脉，很少有系统的研究，旨在了解该地区的生物质燃烧动力学。本文旨在推进我们的理解，在这一地区的燃烧制度，火灾发生的第一个详细和全面的评估和派生的总生物质燃烧排放量的秘鲁热带安第斯山脉的一个地区。我们选择了海拔2000米以上的280万公顷的区域。我们用三种类型的卫星数据分析了12年来的火灾发生情况。火灾动态显示出很大的年内和年际变化，大多数火灾发生在5月至10月（这段时间与旱季相吻合）。总面积烧毁减少，随着降雨量的增加，直到一个给定的降雨阈值，超过没有关系被发现，估计火灾返回间隔（FRI）的面积为37年的草地，这是在报告的范围内的草地，和65年的森林，这是显着短于其他报告的FRI在热带潮湿的森林。对生物质燃烧排放的最大贡献（60- 70%，取决于数据来源）来自燃烧的山地云雾林（在研究期间为450万Mg CO2），尽管仅占总燃烧面积的7.4-10%。总的地上生物量排放量（研究区域为7.55 ± 2.14 Tg CO2; 0.43 ± 0.04 Tg CO; 24，012 ± 2685 Mg CH 4）高于以前报告的热带安第斯山脉。
In the tropical Andes, there have been very few systematic studies aimed at understanding the biomass burning dynamics in the area. This paper seeks to advance on our understanding of burning regimes in this region, with the first detailed and comprehensive assessment of fire occurrence and the derived gross biomass burning emissions of an area of the Peruvian tropical Andes. We selected an area of 2.8 million hectares at altitudes over 2000 m. We analyzed fire occurrence over a 12 year period with three types of satellite data. Fire dynamics showed a large intra‐annual and interannual variability, with most fires occurring May–October (the period coinciding with the dry season). Total area burned decreased with increasing rainfall until a given rainfall threshold beyond which no relationship was found. The estimated fire return interval (FRI) for the area is 37 years for grasslands, which is within the range reported for grasslands, and 65 years for forests, which is remarkably shorter than other reported FRI in tropical moist forests. The greatest contribution (60–70%, depending on the data source) to biomass burning emissions came from burned montane cloud forests (4.5 million Mg CO2 over the study period), despite accounting for only 7.4–10% of the total burned area. Gross aboveground biomass emissions (7.55 ± 2.14 Tg CO2; 0.43 ± 0.04 Tg CO; 24,012 ± 2685 Mg CH4 for the study area) were larger than previously reported for the tropical Andes.