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Institute for Energy and Climate Research

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As an extension of the Atmosphere-Simulation Chamber SAPHIR, the group is currently developing an environmentally-controlled dynamic (flow-through) Plant Chamber under SAPHIR (SAPHIR-PLUS). This facility allows feeding a natural blend of biogenic trace gases into SAPHIR. Plants emit a vast number of individual volatile organic compounds (VOC). The emission strength and emission pattern depends on plant type and environmental conditions. The exact effects of climate change and associated stress conditions on VOC emissions are currently unknown.  PLUS will be utilized to characterize the atmospheric chemistry of natural VOC mixtures at close to ambient concentration levels. Beside temperature control (panel heating/cooling), light control (LED panels), and soil water control (irrigation system), special emphasis is put on the use of inert non-emitting materials as inner surfaces of the chamber.

SAPHIR-PLUS will advance the capability to study the exchange of biogenic volatile compounds and their influence on the atmospheric oxidant cycle and secondary organic aerosols, among others.

SAPHIR PLUS schemeScheme of the plant climate chamber (PLUS) at SAPHIR for detailed studies of atmospheric fate of biogenic emissions and their impact on the atmospheric self cleansing capacity and air quality.

SAPHIR PLUS technical drawingTechnical drawing of PLUS with three compartments: light control unit (1), plant stem region (2), and soil region (3) that are controlled with respect to temperature, humidity and trace gas concentrations.