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Aircraft measurements of ammonia and nitric acid in the lower troposphere

The first simultaneous measurements of ammonia and nitric acid in the troposphere have been made from an aircraft using a tungsten oxide denuder system. Vertical profiles of NH3 and HNO3 taken over…
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An intercomparison of airborne nitric acid measurements

Results from an airborne intercomparison of techniques to measure tropospheric levels of nitric acid are discussed. The intercomparison was part of the National Aeronautics and Space Administration's…
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Ammonia and nitric acid emissions from wetlands and boreal forest fires

Tests conducted during three (one boreal and two wetland) ecosystem fires have established the NH3- and HNO3-determination effectiveness of the 'tungsten oxide denuder' technique, using a low-flying…
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Trace gas emissions from burning Florida wetlands

Measurements of biomass burn-produced trace gases are presented that were obtained using a helicopter at low altitudes above burning Florida wetlands on November 9, 1987, and from both helicopter and…
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An intercomparison of five ammonia measurement techniques

An intercomparison has been conducted among five instruments which measure gas phase ammonia at low concentration in the atmosphere: (1) a photofragmentation/laser-induced fluorescence (PF/LIF)…
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Nitric acid and ammonia emissions from a mid-latitude prescribed wetlands fire

We have obtained the first simultaneous measurements of gaseous nitric acid (HNO/sub 3/) and ammonia (NH/sub 3/) in the smoke plume of a wetlands biomass burn. These measurements were made using…
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Peroxyacetyl nitrate measurements during CITE 2 - Atmospheric distribution and precursor relationships

Aircraft measurements of peroxyacetyl nitrate (PAN) and other important reactive nitrogen species (NO, NO2, HNO3, and NOy) were performed over the continental United States and the eastern Pacific…
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Measurements of the nitric acid to NOx ratio in the troposphere

Nitric acid concentrations, measured by both teflon/nylon filter packs (FP) and the tungstic oxide denuder (DEN), are compared with the average NOx concentrations from laser-induced fluorescent and…
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Correlation interferometric measurement of trace species in the atmosphere.

Two correlation interferometers, a breadboard model and an engineering model, were designed, constructed, and tested for the measurement of selected atmospheric trace species. Test results showed…
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An Intercomparison of Airborne Nitric Acid Measurements During CITE-2

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