Premium
Photofragmentation two‐photon laser‐induced fluorescence detection of NO 2 and NO: Comparison of measurements with model results based on airborne observations during PEM‐Tropics A
Author(s) -
Bradshaw J.,
Davis D.,
Crawford J.,
Chen G.,
Shetter R.,
Müller M.,
Gregory G.,
Sachse G.,
Blake D.,
Heikes B.,
Singh H.,
Mastromarino J.,
Sandholm S.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl900015
Subject(s) - troposphere , fluorescence , tropics , laser induced fluorescence , atmospheric sciences , environmental science , decomposition , atmosphere (unit) , analytical chemistry (journal) , remote sensing , atomic physics , chemistry , physics , optics , meteorology , geology , environmental chemistry , biology , ecology , organic chemistry
Measurements of NO and NO 2 are reported using a highly modified photofragmentation two‐photon laser‐induced fluorescence (PF‐TP‐LIF) instrument. Available evidence suggests that the changes made substantially reduced wall decomposition of labile NO y species. In sharp contrast to the results reported from NASA's 1991 PEM‐West A program where the median value for the ratio (NO 2 ) meas /(NO 2 ) calc was 3.36, the PEM‐Tropics A observations produced a value for this ratio of 0.93. This represents the first time that remote upper tropospheric NO‐NO 2 data have shown a high degree of correspondence with current photochemical mechanisms.