Remote‐sensing constraints on South America fire traits by Bayesian fusion of atmospheric and surface data
Remote‐sensing constraints on South America fire traits by Bayesian fusion of atmospheric and surface data
复制标题
通过大气和地表数据的贝叶斯融合对南美火灾特征进行遥感约束
DOI：
10.1002/2014gl062584
复制
发表时间：
2015
影响因子：
5.2
通讯作者：
D. Schimel
中科院分区：
文献类型：
--
作者：
A. A. Bloom;J. Worden;Zhe Jiang;H. Worden;T. Kurosu;C. Frankenberg;D. Schimel
卫星观测显示，2007 年和 2010 年热带南美洲火灾季节发生了大规模燃烧，两年的总燃烧面积相似。然而，尽管 2010 年发生了百年一遇的干旱，但基于卫星 CO 浓度测量的 2010 年 CO 火灾排放量却大幅降低 (-28%)。我们使用贝叶斯推断以及卫星测量的 CH4 和 CO 浓度以及燃烧面积来量化 2010 年燃烧特征相对于 2007 年的变化。我们发现与 2010 年火灾相关的燃烧生物量密度减少的可能性为 88%，并且与 2007 年相比，2010 年火灾碳损失降低的可能性为 82%。较高的燃烧效率是 2010 年二氧化碳排放量减少的较小影响因素。燃烧生物量密度的减少与前几个月全球臭氧监测实验 2 太阳诱导荧光（初级生产总量的代表）的减少 (4-6%) 以及由于重复火灾而导致的生物量潜在减少 (≤8.3%) 一致。
Satellite observations reveal substantial burning during the 2007 and 2010 tropical South America fire season, with both years exhibiting similar total burned area. However, 2010 CO fire emissions, based on satellite CO concentration measurements, were substantially lower (−28%), despite the once‐in‐a‐century drought in 2010. We use Bayesian inference with satellite measurements of CH4 and CO concentrations and burned area to quantify shifts in combustion characteristics in 2010 relative to 2007. We find an 88% probability in reduced combusted biomass density associated with the 2010 fires and an 82% probability of lower fire carbon losses in 2010 relative to 2007. Higher combustion efficiency was a smaller contributing factor to the reduced 2010 CO emissions. The reduction in combusted biomass density is consistent with a reduction (4–6%) in Global Ozone Monitoring Experiment 2 solar‐induced fluorescence (a proxy for gross primary production) during the preceding months and a potential reduction in biomass (≤8.3%) due to repeat fires.
影响因子：
4.9
作者：
Bloom, A. A.;Williams, M.
通讯作者：
Williams, M.