Angle matters: Bidirectional effects impact the slope of relationship between gross primary productivity and sun‐induced chlorophyll fluorescence from Orbiting Carbon Observatory‐2 across biomes
Angle matters: Bidirectional effects impact the slope of relationship between gross primary productivity and sun‐induced chlorophyll fluorescence from Orbiting Carbon Observatory‐2 across biomes
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DOI：
10.1111/gcb.14427
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发表时间：
2018-09
影响因子：
11.6
通讯作者：
Zhaoying Zhang;Yongguang Zhang;J. Joiner;M. Migliavacca
中科院分区：
文献类型：
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作者：
Zhaoying Zhang;Yongguang Zhang;J. Joiner;M. Migliavacca
书面总结：为了充分利用这些测量结果，特别是考虑到它们与总初级生产量的密切关系，必须了解太阳传感器的几何形状如何影响卫星太阳诱导荧光。我们展示了SIF在太阳主平面上不同观测天顶角的双向性，并观察到从后向到前向散射方向的清晰的碗状SIF。因此，当使用OCO-2 SIF数据来评估SIF-GPP关系时，重要的是考虑SIF的双向性。
Written Summary: It is important to understand how sun-sensor geometry affects satellite sun-induced fluorescence (SIF) in order to take full advantage of these measurements, particularly given their close relationship with gross primary production (GPP). We displayed the bidirectionality of SIF at different viewing zenith angles in the solar principal plane and observed a clear bowl shape of SIF from the backward to forward scattering directions. Therefore, it is important to consider the bidirectionality of SIF when using OCO-2 SIF data to evaluate the SIF-GPP relationship.