Abstract. Permafrost-affected ecosystems of the Arctic–boreal zone in northwestern North America are undergoing profound transformation due to rapid climate change. NASA's Arctic Boreal Vulnerability Experiment (ABoVE) is investigating characteristics that make these ecosystems vulnerable or resilient to this change. ABoVE employs airborne synthetic aperture radar (SAR) as a powerful tool to characterize tundra, taiga, peatlands, and fens. Here, we present an annotated guide to the L-band and P-band airborne SAR data acquired during the 2017, 2018, 2019, and 2022 ABoVE airborne campaigns. We summarize the ∼80 SAR flight lines and how they fit into the ABoVE experimental design (Miller et al., 2023; https://doi.org/10.3334/ORNLDAAC/2150). The Supplement provides hyperlinks to extensive maps, tables, and every flight plan as well as individual flight lines. We illustrate the interdisciplinary nature of airborne SAR data with examples of preliminary results from ABoVE studies including boreal forest canopy structure from TomoSAR data over Delta Junction, AK, and the Boreal Ecosystem Research and Monitoring Sites (BERMS) area in northern Saskatchewan and active layer thickness and soil moisture data product validation. This paper is presented as a guide to enable interested readers to fully explore the ABoVE L- and P-band airborne SAR data (https://uavsar.jpl.nasa.gov/cgi-bin/data.pl).

中文翻译：

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ABoVE L 波段和 P 波段机载合成孔径雷达测量


摘要。由于快速的气候变化，北美西北部北极-寒带地区受永久冻土影响的生态系统正在经历深刻的转变。美国宇航局的北极寒带脆弱性实验（ABoVE）正在研究使这些生态系统对这种变化脆弱或有弹性的特征。 ABoVE 采用机载合成孔径雷达 (SAR) 作为描绘苔原、针叶林、泥炭地和沼泽特征的强大工具。在这里，我们提供了 2017 年、2018 年、2019 年和 2022 年 ABoVE 机载活动期间获取的 L 波段和 P 波段机载 SAR 数据的注释指南。我们总结了 ∼80 SAR 飞行路线以及它们如何融入 ABoVE 实验设计（Miller 等人，2023；https://doi.org/10.3334/ORNLDAAC/2150）。该增刊提供了大量地图、表格、每个飞行计划以及个别飞行线路的超链接。我们以 ABoVE 研究的初步结果为例来说明机载 SAR 数据的跨学科性质，包括阿拉斯加州 Delta Junction 和萨斯喀彻温省北部北方生态系统研究和监测站点 (BERMS) 区域的 TomoSAR 数据中的北方森林冠层结构和活动层厚度和土壤湿度数据产品验证。本文作为指南，使感兴趣的读者能够充分探索 ABoVE L 和 P 波段机载 SAR 数据 (https://uavsar.jpl.nasa.gov/cgi-bin/data.pl)。