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几乎全球所有地方都会发生植被火情。无论是自然的,还是人为的植被火情,都与生物圈以一种复杂的方式相互作用着。用1992～1993年跨12个月的全球系列NOAA AVHRR卫星影像数据,已首次使从全球角度实现火情动态的定量研究成为可能。这里展示的结果显示出从遥感数据得出的活动火情的时空分布。该年中的各个时间几乎全球每一个地区的火情都已探测到,而探测到的80%的火情发生在热带地区,并且非洲大陆为最多。受影响的主要植被类型是热带草原树林。本文对这个信息应用于大气化学、土地利用和土地覆盖变化的可能性进行了讨论。
Vegetation fire occurs in almost all parts of the world. Both natural and man-made vegetation fires interact with the biosphere in a complex way. Using the global series of NOAA AVHRR satellite image data spanning 12 months from 1992 to 1993, it has for the first time made it possible to quantitatively study the dynamics of the fire globally. The results presented here show the spatial and temporal distribution of active fires derived from remote sensing data. Almost every part of the globe was detected at various times of the year, with 80% of the detected fires occurring in the tropics and the continent at its highest. The main type of vegetation affected is savannah forest. This paper discusses the potential of this information for atmospheric chemistry, land use and land cover change.