NOAA HMS Smoke Detection

This layer shows the areas with observed smoke associated with fires using the latest satellite imagery from the NOAA Hazard Mapping System (HMS). The smoke analysis is based on visual classification of plumes using GOES-18 and GOES-19 Advanced Baseline Imager (ABI) true-color imagery available during the sunlit part of the day. A new daily map is initiated around 7-8AM Eastern Time although since the analysis generally requires multiple satellite images to help distinguish smoke from clouds and other atmospheric aerosols, the first smoke analysis for the current day is usually produced around the local noon time – until then, only fire detection points may be available. Additional smoke analysis and updates will occur throughout the day until sunset or as observation conditions permit. Smoke attributes carry the start and end times (in Universal Time Coordinated - UTC) of the satellite image sequence used to outline the smoke polygon, the corresponding satellite from which the image was derived, and the plume density. The density information is qualitatively labeled as light, medium, and heavy based on the apparent thickness (opacity) of the smoke in the satellite imagery. Those three distinct groups are meant to approximate smoke concentrations ranging between 0-10, 10-21, and 21-32 micrograms per cubic meter, respectively, although no guarantee is made about the actual smoke density measured in the atmospheric column surrounding those areas. Email your questions to the HMS fire team at: [e-mail]本图层展示了使用美国国家海洋和大气管理局（NOAA）灾害映射系统（Hazard Mapping System, HMS）的最新卫星影像，标识出与火灾相关的已观测烟雾分布区域。本次烟雾分析基于对烟羽的目视分类，所用影像为GOES-18与GOES-19搭载的先进基线成像仪（Advanced Baseline Imager, ABI）在日间日照时段获取的真彩色卫星影像。每日首张烟雾图的生成工作会在东部时间7至8点左右启动，但由于烟雾分析通常需要多幅卫星影像来区分烟雾、云层与其他大气气溶胶，当日首份完整烟雾分析结果通常于当地正午前后生成；在此之前，仅可获取火灾探测点数据。当日后续将持续开展烟雾分析与更新工作，直至日落或受观测条件限制无法继续。烟雾属性包含用于勾勒烟雾多边形的卫星影像序列的起始与结束时间（采用协调世界时UTC）、影像所属卫星，以及烟羽密度。密度信息根据卫星影像中烟雾的表观厚度（不透明度）分为轻、中、重三类，该三类大致对应浓度范围分别为0~10、10~21与21~32微克/立方米，但不保证该分类与上述区域周边大气柱内实测的烟雾浓度完全一致。如有疑问，请致信HMS火灾工作组：[e-mail]。