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Global tropospheric measurements of mitric acid vapor and particulate nitrate
Author(s) -
Huebert B. J.,
Lazrus A. L.
Publication year - 1978
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/gl005i007p00577
Subject(s) - troposphere , particulates , altitude (triangle) , nitrate , atmospheric sciences , environmental science , water vapor , boundary layer , planetary boundary layer , environmental chemistry , nox , climatology , meteorology , chemistry , geology , combustion , geography , physics , geometry , mathematics , organic chemistry , thermodynamics
Measurements of HNO 3 vapor and particulate NO 3 − were made over continental and marine areas, at altitudes from .2 to 7 km, as a part of Project Gametag. HNO 3 vapor was found to be as common over marine areas, far from anthropogenic sources of NO x , as over remote continental regions, ranging from < .02 to .3 ppbv. Urban influenced continental values ranged from .3 to .86 ppbv. Comparable HNO 3 was found both above and within the boundary layer, in contrast to theoretical predictions of a negative HNO 3 gradient with altitude. In many regions of the troposphere there was more HNO 3 vapor than participate NO 3 − , although the reverse is true in the marine boundary layer, where it appears that heterogeneous chemistry converts HNO 3 and Cl − to HCl and particulate NO 3 − . This rather limited data set suggests an HNO 3 lifetime on the order of a few days.