在对比的海洋水域中评估CALIOP衍生的反向散射系数 (bbp(532) 产物
Optics express
|August 13, 2025
概括
卡利普索卫星传感器准确地估计了海洋反散 (bbp532)),这对于了解海洋粒子动态至关重要. 验证证实其可靠性,特别是在极地地区,尽管最近的功率波动.
科学领域:
- 海洋光学 海洋光学
- 卫星遥感 卫星遥感 卫星遥感
- 海洋学 海洋学 海洋学
背景情况:
- 云气溶激光雷达和红外探路器卫星观测 (CALIOP) 传感器最初用于大气研究,已被调整为在532nm (bbp(532) 获取海洋反射系数.
- 以前的验证工作受到稀缺的匹配和缺乏标准化的协议的限制.
- 与被动传感器相比,CALIOP具有优势,特别适用于夜间和极地-亚极地海洋地区.
研究的目的:
- 通过使用标准化协议和多样化的现场数据集,严格验证CALIOP衍生的海洋bbp ((532)).
- 评估CALIOP bbp(532) 产品在2018-2021年期间的性能,并将其与早期数据和其他卫星产品进行比较.
主要方法:
- 使用标准化协议对CALIOP bbp(532) 数据进行评估,并将其与来自各种海洋水域的现场测量 (2008-2021) 相比.
- 与MODIS-Aqua bbp(532) 产品进行比较.
- 评估CALIOP bbp(532) 使用生物化学-阿戈 (BGC-Argo) 2018-2021年期间的浮动数据.
主要成果:
- 在CALIOP和in-situ bbp(532) 测量之间发现了强烈的相关性 (R2高达0.94),根平均平方 (RMS) 误差和平均相对误差 (MRE) 较低.
- 根据CALIOP的估计,结果与MODIS-Aqua bbp的产品相似.
- 与BGC-Argo数据 (2018-2021) 的评估表明,与整个2008-2021年期间相比,相关性较低,可能是由于CALIOP激光雷达功率下降.
结论:
- CALIOP传感器提供了一种可靠的方法来估计海洋BBP{532},对于被动传感器具有挑战性的地区和时间特别有价值.
- 验证证实了CALIOP数据对海洋学研究的有用性,尽管近年来观察到的性能变化.
- 持续监测和潜在的重新校准可能是必要的,以考虑到长期的传感器退化.
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