Continental Africa biomass burning temporal dynamics derived from MSG SEVIRI
Continental Africa biomass burning temporal dynamics derived from MSG SEVIRI
复制标题
来自 MSG SEVIRI 的非洲大陆生物质燃烧时间动态
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Weidong Xu
中科院分区：
文献类型：
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作者：
G. Roberts;M. Wooster;E. Lagoudakis;P. Freeborn;Weidong Xu
介绍了对气象卫星旋转增强可见光和红外成像仪（SEVIRI）一年的主动火灾数据的分析。利用以15分钟时间间隔和3公里空间分辨率获得的火辐射功率观测数据来估计非洲生物质燃烧总量。2004年2月至2005年1月期间，非洲生物质燃烧量估计至少为8.55亿吨。FRP衍生的生物质燃烧估计在1度的空间尺度被发现小于2公斤/平方米。在稀树草原的FRP衍生的中值燃料消耗量估计为300克/平方米是在良好的协议与文献值。火像素的时间持久性的分析表明，大多数非洲火灾被检测到只有一次在连续的15分钟的图像。火像素的持续时间是最长的高峰生物量燃烧季节与较大比例的像素只检测到一次在雨季。的昼夜火灾周期的变化进行了调查，相对于土地覆盖类型，虽然注意到土地覆盖之间的差异，一个给定的土地覆盖类型的昼夜特征是类似的，在两个非洲半球。
An analysis of one year of METEOSAT Spinning Enhanced Visible and Infrared Imager (SEVIRI) active fire data is presented. Fire Radiative Power (FRP) observations, acquired at a 15-minute time interval and 3 km spatial resolution, are used to estimate the total amount of African biomass combustion. African biomass combustion between February 2004 and January 2005 is estimated to be at least 855 million tonnes. FRP-derived biomass combustion estimates at a 1-degree spatial scale are found to be less than 2 kg/m2. In savanna grasslands the FRP-derived median fuel consumption estimate of 300 g/m2 is in good agreement with literature values. Analysis of fire pixel temporal persistence indicates that the majority of African fires are detected only once in consecutive 15 minute images. Fire pixel duration is longest during the peak biomass burning season with a greater proportion of pixels detected only once during the wet season. An investigation of the variability of the diurnal fire cycle is carried out with respect to land cover type, and whilst differences are noted between land covers, the diurnal characteristics for a given land cover type are similar in both African hemispheres.