概括
基于太空的激光雷达测量提供了对水的全新的全球视图.
科学领域:
- 海洋学和水文学
- 遥感 遥感 遥感 遥感
- 气候科学 气候科学
背景情况:
- 自然水的衰减系数对于理解海洋学和生物过程至关重要.
- 关于海洋水域里达尔衍生减弱系数的现有数据是有限的.
- 基于太空的激光雷达技术为全球范围的观测提供了新的能力.
研究的目的:
- 通过使用ATLAS/ICESat-2夜间数据,对激光雷达衍生衰减系数 (klidar) 进行全球调查.
- 增加现有的海洋颜色数据集,以日间和极地夜间观测.
- 为了证明使用ATLAS/ICESat-2数据进行全球光学研究的可行性.
主要方法:
- 利用来自ATLAS/ICESat-2空间激光雷达的夜间测量.
- 在532 nm的衍生衰减系数 (klidar).
- 分析了全球和区域的变化,包括沿海和极地地区.
主要成果:
- 亚特拉斯测量出的klidar值在532nm处从0.045到0.39m-1不等.
- 较高的基达值 (>0.15 m-1) 与沿海和海冰覆盖的海洋有关.
- 在清晰的寡度性海洋旋转中,平均克里达约为0.058 ± 0.012 m-1.1.
结论:
- 亚特拉斯/ICESat-2激光雷达测量对于全球的激光雷达研究是可行的.
- 这些发现为气候模型提供了关于海冰下光线的关键数据.
- 这项研究使得在海洋上层进行更好的热沉积研究成为可能.
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