Analysis of atmospheric hydrocarbons during winter MONEX

Dagmar Rais Cronn; Winai Nutmagul

doi:10.3402/tellusa.v34i2.10798

Analysis of atmospheric hydrocarbons during winter MONEX

Tellus

Volume 34 (1982): Issue 2

By: Dagmar Rais Cronn and Winai Nutmagul

Open Access

|Jan 1982

Abstract

The distribution of gaseous atmospheric hydrocarbon compounds, halocarbons, and nitrous oxide were studied. Whole air samples were collected aboard the NCAR Electra aircraft platform during the Monsoon Experiment (MONEX) flights in Kuala Lumpur, Malaysia, and on ferry flights to and from the United States. Foliage emission rates were also measured on some tropical plants.

The average free tropospheric TNMHC (total non-methane hydrocarbon) levels from both the transit flight and mission flights were low (2.5 μg/m³). TNMHC just above the forest canopy over Borneo but within the mixing layer was higher and the concentrations over land were higher than those obtained over the ocean. The fluorocarbons showed a small latitude gradient or a difference between continental and oceanic air masses or (possibily) both. Methyl chloroform also showed a significant latitude profile. Nitrous oxide was uniformly distributed in the atmosphere. The C₂ hydrocarbons, ethane and acetylene, also showed latitudinal gradients.

The emission rates of foliage in the tropics were higher than those reported by other investigators for the mid-latitudes. The species sampled indicated that most tropical vegetation emits predominantly isoprene, rather than terpenes.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v34i2.10798 | Journal eISSN: 3035-9554

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Language: English

Page range: 159 - 165

Submitted on: Nov 19, 1980

Accepted on: Mar 30, 1981

Published on: Jan 1, 1982

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1982 Dagmar Rais Cronn, Winai Nutmagul, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 34 (1982): Issue 2