从1985年到2021年在北极地区的Landsat衍生无透表面积扩张
Zhengrong Liu1, Jie Yang1, Xin Huang2
1School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, PR China.
The Science of the total environment
|September 17, 2023
概括
一个新的北极无透面积 (ISA) 数据集揭示了陆地覆盖面的重大变化. 自1985年以来,北极ISA的数量增加了一倍多,主要是由于俄罗斯,芬兰和挪威的扩张.
科学领域:
- 地球观测 地球观测
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 准确的无透地表绘制对于环境监测至关重要,但全球数据集在北极地区缺乏细节.
- 现有的数据集显示,在北极无透表面积 (ISA) 地图绘制中存在重大遗漏,阻碍了气候和生态变化研究.
研究的目的:
- 开发一个高分辨率 (30米) 无透表面积 (ISA) 数据集,用于北极跨越1985-2021年 (GISA_Arctic).
- 分析过去37年来北极ISA扩张的时间动态和驱动因素.
主要方法:
- 结合视觉解释的ISA样本与自动生成的非ISA样本进行训练.
- 使用适应性随机森林 (RF) 分类器进行长时间序列ISA映射.
- 实施后处理步骤以提高ISA数据的时空一致性.
主要成果:
- GISA_Arctic数据集的整体准确度为93.59%,F-score为0.934.4%,可以实现这一目标.
- 在1985年至2021年间,北极的ISA从857.83平方公里增加到2115.49平方公里.
- 俄罗斯,芬兰和挪威占ISA增长的84%以上,其中原,森林和草原是主要的前体.
结论:
- GISA_Arctic数据集为了解北极地区的人类活动和生态变化提供了宝贵的资源.
- 调查结果强调了北极地区不透气表面的快速扩张,并确定了主要的贡献国和土地覆盖的转型.
- 该数据集可用于进一步研究北极环境动态.
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