The Monitoring Trends in Burn Severity (MTBS) program has been providing the fire science community with large fire perimeter and burn severity data for the past 14 years. As of October 2019, 22 969 fires have been mapped by the MTBS program and are available on the MTBS website (https://www.mtbs.gov). These data have been widely used by researchers to examine a variety of fire and climate science topics. However, MTBS has undergone significant changes to its fire mapping methodology, the remotely sensed imagery used to map fires, and the subsequent fire occurrence, burned boundary, and severity databases. To gather a better understanding of these changes and the potential impacts that they may have on the user community, we examined the changes to the MTBS burn mapping protocols and whether remapped burned area boundary and severity products differ significantly from the original MTBS products. As MTBS data have been used over the course of many years and for many disparate applications, users should be aware that the MTBS burned area and severity products have been actively reviewed and revised to benefit from more robust satellite image availability and to address any observed quality issues. In a sample of 123 remapped fires, we found no significant change in the burned area boundary products when compared to the original mapped fires; however, significant changes did exist in the distribution of unburned, low, and moderate burn severity pixels within the thematic product. Analysis of these remapped fires provides a look into how the MTBS fire mapping methods have evolved over time. In the future, additional changes to the MTBS data record may impact data users’ downstream applications. The MTBS program has an established continuous improvement approach to the MTBS methodology and products, and subsequently encourages users to confirm that they are using the most recent data.

中文翻译：

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映射刻录过程和数据产品的“刻录严重性”监视趋势的更改

过去14年中，“烧伤严重性监测趋势”（MTBS）计划一直为消防科学界提供较大的火灾范围和烧伤严重性数据。截至2019年10月，MTBS计划已绘制22 969起火灾，可在MTBS网站（https://www.mtbs.gov）上找到。研究人员已广泛使用这些数据来研究各种火灾和气候科学主题。但是，MTBS在其火灾绘图方法，用于绘制火灾的遥感图像以及随后的火灾发生，燃烧边界和严重性数据库方面发生了重大变化。为了更好地了解这些更改及其对用户社区的潜在影响，我们检查了MTBS刻录映射协议的更改，以及重新映射的刻录区域边界和严重性产品是否与原始MTBS产品有显着差异。由于MTBS数据已经使用了许多年，并且在许多不同的应用中使用，因此用户应该意识到MTBS烧伤面积和严重性产品已经过积极的审查和修订，以受益于更强大的卫星图像可用性并解决任何观测到的质量问题。问题。在123次重新映射的火灾的样本中，与原始映射的火灾相比，我们发现燃烧区域边界产物没有显着变化。但是，主题产品中未燃烧，低和中等燃烧严重程度像素的分布确实存在重大变化。通过对这些重新映射的火灾的分析，可以了解MTBS火灾映射方法是如何随着时间演变的。将来，对MTBS数据记录的其他更改可能会影响数据用户的下游应用程序。MTBS计划对MTBS方法和产品建立了持续改进的方法，随后鼓励用户确认他们正在使用最新数据。