减少空间分辨率增加了陆地生态系统的净初级生产率预测:随机森林方法
Tao Zhou1, Yuting Hou1, Zhihan Yang1
1College of Earth Sciences, Chengdu University of Technology, Chengdu 610095, China.
The Science of the total environment
|June 28, 2023
概括
不同的空间分辨率显著影响全球净初级生产 (NPP) 估计. 选择正确的分辨率对于准确的碳流量建模和了解陆地碳动态至关重要.
科学领域:
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
- 遥感 遥感 遥感 遥感
背景情况:
- 净初级生产 (NPP) 对陆地碳捕获至关重要.
- 核电站估计的不确定性来自数据,模型和空间分辨率.
研究的目的:
- 评估不同空间分辨率对全球核电站的影响.
- 为了评估一个随机森林模型在各种分辨率的性能.
主要方法:
- 使用随机森林 (RF) 模型与全球观测数据集.
- 在0.05°,0.25°和0.5°的空间分辨率下预测NPP.
- 分析了空间模式,跨年趋势和全球NPP总变化.
主要成果:
- 射频模型表现出令人满意的性能 (建模效率为0.53-0.55).
- 核电站的空间模式和跨年趋势在所有决议中都是一致的.
- 全球核电总量估计在解决方案 (57.3至66.5 Pg C yr-1) 后有显著差异.
结论:
- 空间分辨率显著影响了全球核电站总量的估计,特别是在南半球.
- 解析度转换可以改变空间和时间变化特征.
- 选择适当的空间分辨率对于准确的碳流量建模和建立全球生物地球化学模型基准至关重要.
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