UV-induced carbon monoxide emission from living vegetation

[摘要] The global burden of carbon monoxide (CO) is rather uncertain. In this paperwe address the potential for UV-induced CO emission by living terrestrialvegetation surfaces. Real-time measurements of CO concentrations were madewith a cavity-enhanced laser spectrometer connected in closed loop to eithera chamber on a field of grass or a plant-leaf scale chamber. Leaves of allplant species that were examined exhibited emission of CO in response toartificial UV radiation as well as the UV component of natural solarradiation. The UV-induced rate of CO emission exhibited a low dependence ontemperature, indicating an abiotic process. The emission of CO in response tothe UV component of natural solar radiation was also evident at the naturalgrassland scale.

[学科分类] 地球化学与岩石