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从2000年到2022年,全球年度湿地数据集以30米的高度使用精细分类系统,从2000年到2022年
Xiao Zhang1,2, Liangyun Liu3,4,5, Tingting Zhao1,2,6
1International Research Center of Big Data for Sustainable Development Goals, Beijing, 100094, China.
Scientific data
|March 24, 2024
概括
科学家们使用Landsat图像创建了新的全球湿地地图. 这些地图从2000年至2022年每年跟踪湿地变化,有助于生态系统保护和气候调节研究.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 地理空间分析的研究.
背景情况:
- 湿地对于生态平衡和气候调节至关重要.
- 现有的全球湿地数据集缺乏高空间分辨率 (30m) 和时间动态.
- 湿地的复杂光谱特性阻碍了准确的地图绘制.
研究的目的:
- 开发第一个全球30万年湿地动态数据集 (GWL_FCS30D).
- 为监测2000-2022年湿地变化提供一个全面的资源.
- 支持湿地保护和可持续发展的倡议.
主要方法:
- 使用时间序列的Landsat图像在Google地球引擎平台上处理.
- 采用先前全球培训样本库进行湿地分类.
- 应用了局部自适应分类和时空一致性检查算法.
主要成果:
- 为2000-2022年生成年度全球湿地地图 (GWL_FCS30D),包括八个湿地子类别.
- 在2020年实现了高精度,整体精度为86.95%,卡帕系数为0.822.
- 在湿地动态中显示出显著的时间变化,特别是在美国和欧盟.
结论:
- GWL_FCS30D数据集为全球湿地监测提供了前所未有的细节.
- 这些高分辨率的时间序列数据对于理解湿地生态系统变化至关重要.
- 该数据集预计将对有效的湿地保护和可持续管理策略做出重大贡献.
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