2002年至2021年使用MODIS数据对台加和原湖色趋势的分析
Zijin Wang1, Yingxin Shang2, Zuchuan Li3
1Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Journal of environmental management
|March 21, 2024
概括
尽管气候变化,北极地区的湖泊色总体上正在下降. 这项研究分析了7616个台加和原生物群中的湖泊颜色的长期趋势.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 气候变化研究 气候变化研究
背景情况:
- 全球变暖正在改变泰加和原地区的淡水系统.
- 湖泊色,水色的变化,影响碳循环,生态系统和水质.
- 在这些敏感的生物体中,湖泊色的时空空间模式尚未得到充分理解.
研究的目的:
- 量化北极生物群中湖泊色的长期趋势.
- 为了研究环境因素和湖泊色之间的关系.
- 了解气候变化对淡水系统的生态影响.
主要方法:
- 在谷歌地球引擎上利用MODIS遥感数据 (2002-2021年).
- 分析近紫外线反射率以评估湖泊颜色变化.
- 在泰加和原地区,超过10平方公里的7616个湖泊的量化色趋势.
主要成果:
- 湖泊色的总体下降趋势被观察到 (Theil-Sen斜率 = 0.00015).
- 大约36%的湖泊表现出棕色化趋势,约1%的湖泊显示出统计学上显著的变化 (p < 0.05).
- 在较小的,高度的湖泊中,地面冰含量较低的湖泊中,显著的色趋势更为普遍,与空气温度升高和降水量减少相关.
结论:
- 北极地区的湖泊色趋势显示了对气候变化的复杂反应.
- 了解这些趋势对于预测对生物地球化学循环和生态系统动态的影响至关重要.
- 遥感为监测远程淡水系统中大规模环境变化提供了宝贵的工具.
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