摘要: The second year of work under this contract concentrated on instrument development and field studies to investigate the atmospheric chemistry of the nitrogen oxide family. Available laboratory and field data, in conjunction with m... 展开 The second year of work under this contract concentrated on instrument development and field studies to investigate the atmospheric chemistry of the nitrogen oxide family. Available laboratory and field data, in conjunction with model calculations, suggest that this family of compounds may impact on air quality in at least three significant ways: (1) produce one of the major atmospheric acidic compounds, HNO3; (2) lead to major increases in the concentration levels of potentially harmful oxidants such as O3 and PAN-type compounds; and (3) control the levels of still other more reactive atmospheric oxidants such as OH and HO2. Specific species for which measurement technology was explored during the second year of work include NO2, NO3, and HNO2. Much of the field sampling effort during the second year focused on the nighttime chemistry of the nitrogen oxides, with special emphasis being placed on observations of NO. In addition to ground-based field studies, additional airborne field studies were conducted. 收起