Paleowind directions in northern North America from stabilized sand dunes

Past wind directions are mapped from stabilized sand dunes in Canada and the northern United States. The map shows the near-surface wind directions responsible for transporting sand when the dunes were active. The directions were mapped by interpreting the orientation of parabolic dunes from open-sourced Lidar (light detection and ranging) derived digital terrain models. The map also shows new dune areas that add to the existing knowledge of dune fields in North America. The interpreted wind directions provide insight into the past atmospheric circulation patterns that occurred during the deglaciation of North America and the transition to modern circulation patterns that occur today.

本数据集的古风向数据源自加拿大与美国北部的固定沙丘。该数据集展示了沙丘活跃时期负责搬运沙粒的近地表风向。这些风向通过解读开源激光雷达（Lidar，Light Detection and Ranging）生成的数字地形模型中的抛物线沙丘方位完成绘制。本数据集还收录了新增的沙丘区域，补充了北美沙丘地貌领域的现有研究认知。经解读得到的风向数据，可帮助研究者深入了解北美冰消期的古大气环流模式，以及该时期向现今现代大气环流模式的转变过程。