使用卫星产品对埃里湖中甲度的长期时空变异性和制度分类
Taeho Kim1, HaeDeun Lee2, SooHyun Yang2
1Civil and Environmental Engineering Department, University of Michigan, United States.
Harmful algae
|August 20, 2025
概括
卫星数据显示埃里湖西部的叶绿素热点, 这种分析有助于管理有害藻类的繁殖,并优先考虑监测工作.
科学领域:
- 环境科学
- 遥感技术
- 石化技术
背景情况:
- 监测叶绿素-a (Chl-a) 对于管理厄里湖有害藻类繁殖至关重要.
- 现场测量提供有限的空间覆盖,需要卫星数据进行全面分析.
- 卫星产品提供更广泛的时空覆盖,克服了基于点的测量限制.
研究的目的:
- 选择最佳的卫星产品来监测埃里湖的Chl-a.
- 分析长期的时空Chl-a动态并确定趋势.
- 为有针对性的管理策略分类Chl-a制度.
主要方法:
- 评估了九个卫星产品,根据与现场数据的相关性和数据可用性选择MODIS-Terra.
- 对埃里湖的24年 (2000-2023) 的MODIS-Terra Chl-a数据进行了分析.
- 应用曼-肯德尔测试来评估长期趋势和分类的Chl-a疗法.
主要成果:
- MODIS-Terra显示了与现场数据和高像素可用性的强烈相关性 (ρ = 0.71).
- 在埃里湖西部和海岸线上观察到较高的Chl-a度,在8月/9月达到峰值.
- 在该湖34.43%的水域中发现了Chl-a的增加趋势,主要是在西部和中部地区.
- 根据水平和趋势确定了九种不同的Chl-a方案.
结论:
- MODIS-Terra是埃里湖长期化物监测的最佳方式.
- 长期分析显示了Chl-a水平和趋势的显著空间异质性.
- 制度分类有助于优先管理工作和扩大HAB的监测网络.
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