SGER: Using Photogrammetry to Assess 50 Years of Change in Arctic Vegetation: A Feasibility Study

该项目将收集阿拉斯加北部地区的低空航空照片，这些照片以前是在1948年和1949年拍摄的。这些新照片将被用来研究植被和景观的年代代性变化，这些变化可能是对过去二十年来阿拉斯加北极地区发生的显著气候变暖的反应。比较的目的是：1)确定是否发生了生态变化，2)是否可以使用倾斜航空摄影来检测变化。这项可行性研究的结果可以作为一项技术的示范，该技术可以应用于50年前在阿拉斯加北极斜坡上拍摄的一组广泛分布的航空照片。

This project will collect low altitude aerial photographs at sites in northern Alaska where photographs were previously taken in 1948 and 1949. The new photographs will be examined for evidence of decadal changes in vegetation and landscape that may have occurred in response to a significant climatic warming that has taken place in the Alaskan Arctic over the past two decades. The purpose of the comparison is: 1) to determine if ecological change has occurred and 2) if oblique aerial photography can be used to detect the changes. The results of this feasibility study could be useful as demonstration of a technique that could be applied to a widely distributed set of aerial photographs taken fifty years ago over much of the Arctic Slope in Alaska.