Isoprene photochemistry over the Amazon rainforest
Copyright policy )Isoprene photochemistry over the Amazon rainforest
Significance For isolated regions of the planet, organic peroxy radicals produced as intermediates of atmospheric photochemistry have been expected to follow HO 2 rather than NO pathways. Observational evidence, however, has been lacking. An accurate understanding of the relative roles of the two pathways is needed for quantitative predictions of the concentrations of particulate matter, oxidation capacity, and consequent environmental and climate impacts. The results herein, based on measurements, find that the ratio of the reaction rate of isoprene peroxy radicals with HO 2 to that with NO is about unity for background conditions of Amazonia. The implication is that sufficient NO emissions are maintained by natural processes of the forest such that both HO 2 and NO pathways are important, even in this nominally low-NO region.
- Pacific Northwest National Laboratory United States
- University of Wisconsin–Madison United States
- Sao Paulo State University Brazil
- University of California, Irvine United States
- Universidade de São Paulo Brazil
Ionization, Isoprene, 550, isoprene photochemistry, Mass Spectrometry, [PHYS.PHYS.PHYS-AO-PH] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], organic hydroperoxides, Reaction Analysis, Boundary Layer, Acrolein, Ketone Derivative, Air Pollutants, Hemiterpene, Isoprene Peroxy Radical, Acrolein Derivative, Nitrogen Derivative, Butanones, Peroxides, Methacrolein, Chemistry, Air Pollutant, Priority Journal, 1,3 Butadiene Derivative, Methacrylaldehyde, Alkanone, Oxidation-Reduction, Human, Isomerization, Rainforest, Limit Of Detection, Free Radicals, Photochemistry, Peroxide, Nitric Oxide, Unclassified Drug, Hemiterpenes, Air Pollution, Pentanes, Pentane, Butadienes, Humans, Photooxidation, Amazon, Oxidation Reduction Reaction, Radiation Response, Analogs And Derivatives, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, Atmosphere, [SDE.MCG] Environmental Sciences/Global Changes, 3-buten-2-one, Methylvinyl Ketone, Concentration (parameters), Particulate Matter, Urban Area, Free Radical, Analysis
Ionization, Isoprene, 550, isoprene photochemistry, Mass Spectrometry, [PHYS.PHYS.PHYS-AO-PH] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], organic hydroperoxides, Reaction Analysis, Boundary Layer, Acrolein, Ketone Derivative, Air Pollutants, Hemiterpene, Isoprene Peroxy Radical, Acrolein Derivative, Nitrogen Derivative, Butanones, Peroxides, Methacrolein, Chemistry, Air Pollutant, Priority Journal, 1,3 Butadiene Derivative, Methacrylaldehyde, Alkanone, Oxidation-Reduction, Human, Isomerization, Rainforest, Limit Of Detection, Free Radicals, Photochemistry, Peroxide, Nitric Oxide, Unclassified Drug, Hemiterpenes, Air Pollution, Pentanes, Pentane, Butadienes, Humans, Photooxidation, Amazon, Oxidation Reduction Reaction, Radiation Response, Analogs And Derivatives, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, Atmosphere, [SDE.MCG] Environmental Sciences/Global Changes, 3-buten-2-one, Methylvinyl Ketone, Concentration (parameters), Particulate Matter, Urban Area, Free Radical, Analysis
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