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Sensitivity of scope modelled GPP and fluorescence for different plant functional types

机译：范围建模的GPP和荧光对不同植物功能类型的敏感性

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摘要

This study addresses the question which factors are responsible for reported positive correlations between solar induced fluorescence (SIF) and gross primary production (GPP). A sensitivity analysis of the model SCOPE, which simulates photosynthesis, fluorescence emission and radiative transfer in canopies, has been carried out for four different plant functional types (PFT): tropical rainforest, C4 crops, C3 crops, and tundra, located in distinct climate zones: tropical everwet (Af), tropical with seasonal drought (savannah, Aw), temperate (Cf), and continental tundra (Dfd). Literature values for structural and physiological parameters and climate reanalysis data were used as input. The effect of main driving variables points towards a positive relation between GPP and SIF. For all four climates, the partial derivative of SIF to GPP is higher when irradiance varies than when any other parameter varies. Climate and PFT specific differences occurred, including a hot-spot effect on SIF in the tropics, relatively strong sensitivity of SIF and GPP to carboxylation capacity in the tropics, and a temperature and humidity effect in the tropical seasonal climate.
机译：这项研究解决了哪些因素导致太阳诱导荧光（SIF）与初级总产值（GPP）之间呈正相关的问题。针对四种不同植物功能类型（PFT）进行了SCOPE模型的敏感性分析，该模型模拟了冠层的光合作用，荧光发射和辐射传递：热带雨林，C4作物，C3作物和苔原，它们位于不同的气候下区域：热带湿润（Af），季节性干旱热带（savannah，Aw），温带（Cf）和大陆苔原（Dfd）。结构和生理参数的文献值以及气候再分析数据被用作输入。主要驱动变量的影响指向GPP与SIF之间的正相关关系。对于所有四种气候，当辐照度变化时，SIF对GPP的偏导数要高于其他任何参数变化时的SIF偏导数。出现了气候和PFT的特定差异，包括热带地区对SIF的热点影响，热带地区SIF和GPP对羧化能力的较强敏感性以及热带季节性气候中的温度和湿度影响。

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