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阿拉斯加的20米空间分辨率的泥炭地范围地图

Mark J Lara^1,2, Roger Michaelides³, Duncan Anderson⁴

¹Department of Plant Biology, University of Illinois, Urbana, IL, USA. mjlara@illinois.edu.

Scientific data

|February 6, 2025

概括

阿拉斯加阿拉斯加阿拉斯加阿拉斯加

科学领域:

* 生态系统绘制和遥感.
*对陆地环境的地理空间分析.

背景情况:

*北方地区的泥炭土很普遍,但现有的遥感产品空间分辨率有限 (1公里2).
* 这种分辨率往往无法捕捉子像素异质性,并引入了泥炭地分布图的不确定性.
*准确地绘制地图对于了解泥炭地碳,营养和火灾动态至关重要.

研究的目的:

* 开发阿拉斯加的高分辨率 (20米) 泥炭地图.
* 提高区域泥炭地分布数据的准确性.
*为阿拉斯加的生态研究提供基础数据集.

主要方法:

* 采用了 Sentinel-1 雷达, Sentinel-2 多光谱图像和 ArcticDEM 数据的融合.
* 雇佣的机器学习分类人员接受了对泥炭芯和地面观测的培训.
* 空间限制使用泥炭地适合性模型绘制地图.

主要成果:

*以20米分辨率生成了阿拉斯加约150万平方公里的泥炭地图.
* 达成了85%的总体协议,用于全州的泥炭地图.
* 已识别的泥炭地占阿拉斯加总陆地面积的7.3%,在生态区域之间存在差异.

结论:

* 新的高分辨率泥炭地图显著提高了我们对阿拉斯加泥炭地分布的理解.
* 这一数据集将改善碳,营养和火灾过程的生态模型.
*这些发现强调了高分辨率绘图对于描述异质景观的重要性.

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