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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Ocean Color Continuity From VIIRS Measurements Over Tampa Bay
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Ocean Color Continuity From VIIRS Measurements Over Tampa Bay

机译：坦帕湾VIIRS测量得出的海洋颜色连续性

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Ocean color continuity calls for consistent observations from multiple sensors in order to establish a seamless data record to address earth science questions. Currently, both Moderate Resolution Imaging Spectroradiometer (MODIS) instruments on the Terra and Aqua satellites are being operated well beyond their designed five-year mission life, and they have shown signs of sensor degradation. It is thus urgent to evaluate whether the most recently launched Visible Infrared Imager Radiometer Suite (VIIRS) instrument (2011 to present) can provide consistent observations should MODIS instruments stop functioning. In this study, the consistency between MODIS/Aqua and VIIRS measurements over the Tampa Bay estuary ( ~ 1000 km2) is assessed for remote sensing reflectance (Rrs, sr-1), chlorophyll-a concentrations (Chla, mg·m-3), and absorption coefficient of colored dissolved organic matter (ag(443), m-1). While Rrs was derived as a standard National Aeronautics and Space Administration product from the SeaDAS software package (reprocessing version R2013.0), Chla and ag(443) were estimated using the recently developed regional algorithms for Tampa Bay. Time-series analysis and statistics both showed that the two sensors provided consistent measurements for most products evaluated, with unbiased mean percentage differences of 25% and mean annual biases within -9% (except for one of the eight cases) for large dynamic ranges in Chla (1.0-20 mg·m-3) and ag(443) (0.1-1.5 m-1) in all four bay segments. These estimates are comparable or better than those derived from satellite-in situ comparisons, suggesting that VIIRS will provide observations consistent with MODIS, ensuring ocean color continuity and seamless data records for Tampa Bay. Such observations are crucial in establishing a long-term satellite-based water quality decision matrix for Tampa Bay.
机译：海洋颜色连续性要求从多个传感器进行一致的观测，以便建立无缝的数据记录以解决地球科学问题。目前，Terra和Aqua卫星上的两种中等分辨率成像光谱仪（MODIS）的运行都已超过其设计的五年任务寿命，并且显示出传感器退化的迹象。因此，迫切需要评估一下，如果MODIS仪器停止运行，最新推出的可见光红外成像仪辐射仪套件（VIIRS）仪器（2011年至今）能否提供一致的观察结果。在这项研究中，评估了坦帕湾河口（〜1000 km 2 ）上MODIS / Aqua与VIIRS测量值之间的一致性，以评估遥感反射率（Rrs，sr -1 ），叶绿素a浓度（Chla，mg·m -3 ）和有色溶解有机物的吸收系数（ag（443），m -1 ）。尽管Rrs是从SeaDAS软件包（后处理版本R2013.0）作为国家航空航天局的标准产品衍生而来的，但Chla和ag（443）的估算使用的是坦帕湾最近开发的区域算法。时间序列分析和统计数据均显示，这两种传感器可为大多数所评估产品提供一致的测量结果，其中大动态范围内的平均偏差百分比偏差为25％，年平均偏差在-9％之内（八种情况之一除外）。在所有四个海湾段中，Chla（1.0-20 mg·m -3 ）和ag（443）（0.1-1.5 m -1 ）。这些估计值与通过卫星原位比较得出的估计值相当或更好，这表明VIIRS将提供与MODIS一致的观测结果，从而确保坦帕湾的海洋色彩连续性和无缝数据记录。这些观察对于建立坦帕湾基于卫星的长期水质决策矩阵至关重要。

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