Remote sensing of solar induced Chlorophyll Fluorescence from satellites, airplanes and ground-based stations
Remote sensing of solar induced Chlorophyll Fluorescence from satellites, airplanes and ground-based stations
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DOI：
10.1109/igarss.2016.7729436
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发表时间：
2016-07
期刊：
影响因子：
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通讯作者：
C. Frankenberg;D. Drewry;S. Geier;M. Verma;P. Lawson;J. Stutz;K. Grossmann
中科院分区：
文献类型：
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作者：
C. Frankenberg;D. Drewry;S. Geier;M. Verma;P. Lawson;J. Stutz;K. Grossmann
随着现有的空间高分辨率光谱仪(GOSAT、GOME-2、OCO-2)的出现，全球太阳诱导叶绿素荧光(SIF)观测首次成为可能。SIF的潜力在于为光合作用活动提供一个独立和更直接的指标，并且根据反演方法的不同，不太容易受到大气散射的影响。从经验上看，SIF和总初级生产力(GPP)之间的强烈线性相关性已经在几项研究中被证明，尽管不同的生物群类型的斜率略有不同。在这里，我们展示了轨道碳观测站-2获得的第一个全年的数据，它提供了前所未有的空间分辨率(1.3·2.3公里)、数据量(每天超过100万次测量)和信噪比(>；500)。此外，我们首次使用新建造的叶绿素荧光成像光谱仪(CFIS)直接验证了基于空间的OCO-2 SIF测量，这是一种针对SIF反演和OCO-2验证进行了优化的成像光谱仪。最后，我们将介绍加州大学洛杉矶分校开发的一种新的地面测量系统，用于在地面站进行SIF的长期观测。
With the advent of existing high resolution spectrometers in space (GOSAT, GOME-2, OCO-2), global observations of solar induced chlorophyll fluorescence (SIF) became feasible for the first time. The potential of SIF is to provide an independent and more direct proxy for photosynthetic activity and, depending on retrieval methodology, be less susceptible to atmospheric scattering. Empirically, strong linear correlations between SIF and gross primary production (GPP) have been shown in several studies, albeit with somewhat different slopes per biome type. Here, we show the first full year of data acquired by the Orbiting Carbon Observatory-2, which provides unprecendendet spatial resolution (1.3·2.3 km), data volume (more than 1 million measurements per day) and signal-to-noise ratios (>500). In addition, we show the first direct validation of space-based OCO-2 SIF measurements using the newly built Chlorophyll Fluorescence Imaging Spectrometer (CFIS), an imaging spectrometer optimized for SIF retrievals and OCO-2 validation. To conclude, we will present a new ground-based measurement system developed by UCLA for long term observations of SIF at ground-based stations.