Fire incidence has been linked to multiple factors such as climate conditions, population density, agriculture, and lightning. Recently, fire frequency and severity have induced health problems and contributed to increase atmospheric greenhouse gases. Based on atmospheric susceptibility to fire, this study evaluates the use of a Potential Fire Index (PFIv2) to identify regions prone to fire development, as demonstrated by the satellite detected‐fire in the 2001–2016 interval. It is demonstrated that PFIv2 delivers an efficiency by up to 80% in matching the observed fires from Terra/MODIS satellite. The PFIv2 is also able to reproduce more accurately areas with fire activity with respect to its previous version, the PFI. This better performance is linked to the implementation of parameterization of water pressure deficit and atmospheric stability in the lower troposphere, and a new term to represent the effect of surface temperatures, particularly in mid‐latitudes and extra‐Tropics. To evaluate the performance of the PFIv2 in more details, its comparison to MODIS burned areas demonstrated correlations values higher than 0.6 over the most susceptible regions such as Africa and South America, slightly lower correlation is found where fire does not primary follows the climate annual cycle, and is dominated by high frequency events. These findings indicate that the PFIv2 can be an important tool for decision makers in predicting the potential for vegetation fires development and fire danger.

中文翻译：

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最近二十年（2001-2016年）的植被火灾活动和潜在火灾指数（PFIv2）表现

火灾发生与多种因素有关，例如气候条件，人口密度，农业和闪电。最近，火灾的频率和严重程度已经引起健康问题，并导致大气中温室气体的增加。根据大气对火灾的敏感性，本研究评估了潜在火灾指数（PFIv2）的使用，以识别容易发生火灾的区域，如2001–2016年间卫星探测到的火灾所证明的那样。事实证明，PFIv2在匹配Terra / MODIS卫星观测到的火情方面可提供高达80％的效率。与之前的版本PFI相比，PFIv2还能够更精确地复制发生火灾的区域。更好的性能与对流层下部水压赤字和大气稳定性参数化的实现有关，并且是代表地表温度影响的新术语，特别是在中纬度和热带地区。为了更详细地评估PFIv2的性能，其与MODIS燃烧区域的比较表明，在非洲和南美等最易感地区，相关值高于0.6，而在并非主要火灾遵循气候年周期的地区，发现相关值略低，并以高频事件为主。这些发现表明，PFIv2可以成为决策者预测植被火灾和火灾危险的重要工具。以及一个代表地表温度影响的新术语，特别是在中纬度和热带地区。为了更详细地评估PFIv2的性能，其与MODIS燃烧区域的比较表明，在非洲和南美等最易感地区，相关值高于0.6，而在并非主要火灾遵循气候年周期的地区，发现相关值略低，并以高频事件为主。这些发现表明，PFIv2可以成为决策者预测植被火灾和火灾危险的重要工具。以及一个代表地表温度影响的新术语，特别是在中纬度和热带地区。为了更详细地评估PFIv2的性能，其与MODIS燃烧区域的比较表明，在非洲和南美等最易感地区，相关值高于0.6，而在并非主要火灾遵循气候年周期的地区，发现相关值略低，并以高频事件为主。这些发现表明，PFIv2可以成为决策者预测植被火灾和火灾危险的重要工具。6在诸如非洲和南美等最易受影响的地区，发现火势并非主要跟随气候年周期，而是由高频事件主导的相关性较低。这些发现表明，PFIv2可以成为决策者预测植被火灾和火灾危险的重要工具。6在诸如非洲和南美等最易受影响的地区，发现火势并非主要跟随气候年周期，而是由高频事件主导的相关性较低。这些发现表明，PFIv2可以成为决策者预测植被火灾和火灾危险的重要工具。