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首页> 外文期刊>Applied optics >Airborne laser-induced oceanic chlorophyll fluorescence: solar-induced quenching corrections by use of concurrent downwelling irradiance measurements
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Airborne laser-induced oceanic chlorophyll fluorescence: solar-induced quenching corrections by use of concurrent downwelling irradiance measurements

机译：机载激光诱导的海洋叶绿素荧光：通过同时进行下降流辐照度测量，对太阳引起的猝灭进行校正

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摘要

Airborne laser-induced (and water Raman-normalized) spectral fluorescence emissions from oceanic chlorophyll were obtained during variable downwelling irradiance conditions induced by diurnal variability and patchy clouds. Chlorophyll fluorescence prefiles along geographically repeated inbound and outbound flight track lines, separated in time by ～3-6 h and subject to overlying cloud movement, were found to bo identical after corrections made with concurrent downwelling irradiance measurements. The corrections were accomplished by a mathematical model containing an exponential of the ratio of the instantaneous-to-average downwelling irradiance. Concurrent laser-induced phycoerythrin fluorescence and chromophoric dissolved organic matter fluorescence were found to be invariant to downwelling irradiance and thus, along with sea-surface temperature, established the near constancy of the oceanic surface layer during the experiment and validated the need for chlorophyll fluorescence quenching corrections over wide areas of the ocean.
机译：在昼夜变化和斑云引起的下行下降辐照条件下，获得了来自海洋叶绿素的机载激光诱导（和水拉曼归一化）光谱荧光发射。在同时进行下流辐照度测量后，发现沿地理上重复的进出航迹线的叶绿素荧光预制棒在大约3-6小时的时间内间隔开，并受到上覆的云层运动，它们的波峰相同。校正是通过数学模型完成的，该数学模型包含瞬时下降平均辐射强度与下降下降平均辐射强度之比的指数。发现并发激光诱导的藻红蛋白荧光和发色团溶解的有机物荧光对下降流辐照度没有影响，因此，与海表温度一起，在实验过程中建立了海洋表层的近恒定性，并验证了叶绿素荧光猝灭的必要性在大范围的海洋中进行校正。

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