来自多源遥感的巴西亚马逊生物质地图
Jean Pierre Ometto1, Eric Bastos Gorgens2, Francisca Rocha de Souza Pereira3
1Instituto Nacional de Pesquisas Espaciais (INPE), Av dos Astronautas, 1758, 12227-010, São José dos Campos, SP, Brazil. jean.ometto@inpe.br.
Scientific data
|September 30, 2023
概括
使用广泛的空中LiDAR数据创建了一个新的亚马逊地表生物质 (AGB) 高分辨率地图. 这张地图为了解森林碳库存并为保护工作提供信息提供了关键数据.
科学领域:
- 生态生态学 生态生态学
- 遥感 遥感 遥感 遥感
- 林业林业 林业 林业 林业
背景情况:
- 亚马逊森林是一个关键的全球碳汇,但精确的地面生物质 (AGB) 估计受到有限的现场数据的挑战.
- 气候和土地利用变化需要更新AGB估计,以了解森林动态和碳储存.
研究的目的:
- 为2016年制定巴西亚马逊地区的高分辨率 (250米) 地表生物质地图.
- 量化与生物质估计相关的不确定性.
- 为碳核算和森林管理提供基础数据集.
主要方法:
- 利用了亚马逊最大的空中LiDAR数据集,覆盖了36万平方公里,覆盖了各种植被类型.
- 校准的空中激光扫描 (ALS) 数据与174个地理位置的野外森林库存.
- 采用机器学习方法,整合PALSAR,MODIS和TRMM数据用于区域生物质推断.
主要成果:
- 生成了一个250米分辨率的AGB地图,平均值为174 Mg ha-1,最大值为518 Mg ha-1,标准偏差为102 Mg ha-1.1.
- 该研究在巴西亚马逊地区的所有主要植被类别中绘制了AGB的地图.
- 该数据集提供了区域森林生物质和结构的全面表示.
结论:
- 新的AGB地图为巴西亚马逊地区提供了更高的准确性和空间细节.
- 这一数据集对于碳排放估计,森林保护战略和气候变化缓解政策至关重要.
- 对生物质分布的更好理解有助于在该地区做出明智的决策.
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