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Spatial variability of oceanic phycoerythrin spectral types derived from airborne laser-induced fluorescence emissions

机译：机载激光诱导的荧光发射引起的海洋藻红蛋白光谱类型的空间变异性

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We report spatial variability of oceanic phycoerythrin spectral types detected by means of a blue spectral shift in airborne laser-induced fluorescence emission. The blue shift of the phycoerythrobilin fluorescence is known from laboratory studies to be induced by phycourobilin chromophore substitution at phycoerythrobilin chromophore sites in some strains of phycoerythrin-containing marine cyanobacteria. The airborne 532-nm laser-induced phycoerythrin fluorescence of the upper oceanic volume showed distinct segregation of cyanobacterial chromophore types in a flight transect from coastal water to the Sargasso Sea in the western North Atlantic. High phycourobilin levels were restricted to the oceanic (oligotrophic) end of the flight transect, in agreement with historical ship findings. These remotely observed phycoerythrin spectral fluorescence shifts have the potential to permit rapid, wide-area studies of the spatial variability of spectrally distinct cyanobacteria, especially across interfacial regions of coastal and oceanic water masses. Airborne laser-induced phytoplankton spectral fluorescence observations also further the development of satellite algorithms for passive detection of phytoplankton pigments. Optical modifications to the NASA Airborne Oceanographic Lidar are briefly described that permitted observation of the fluorescence spectral shifts. (C) 1998 Optical Society of America. [References: 20]
机译：我们报告通过机载激光诱导的荧光发射中的蓝色光谱位移检测到的海洋藻红蛋白光谱类型的空间变异性。从实验室研究得知，在一些含有藻红蛋白的海洋蓝细菌菌株中，藻红蛋白生色团在藻红蛋白生色团位点处被藻红蛋白生色团取代所诱导，导致藻红蛋白原发荧光的蓝移。在从沿海水域到北大西洋西部的Sargasso海的飞行横断面中，机载532 nm激光诱导的大洋洋红藻藻红蛋白荧光显示出明显的蓝细菌发色团分离。与历史上的船舶发现相一致，高藻尿素水平仅限于飞行样带的海洋（贫营养）末端。这些遥远观察到的藻红蛋白光谱荧光位移有潜力允许对光谱不同的蓝细菌的空间变异性进行快速，广域研究，尤其是在沿海和海洋水团的界面区域。机载激光诱导的浮游植物光谱荧光观察也进一步促进了被动检测浮游植物色素的卫星算法的发展。简要介绍了对NASA航空海洋激光雷达的光学修改，可以观察到荧光光谱的偏移。 （C）1998年美国眼镜学会。 [参考：20]

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