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The deposition of sulphur dioxide to pine forest assessed by a radioactive tracer method Cover

The deposition of sulphur dioxide to pine forest assessed by a radioactive tracer method

By:  and    
Open Access
|Jan 1977

Abstract

Pine shoots, twigs and bark were exposed to 35SO2 in the field using a small exposure chamber. The rate of uptake by pine needles was found to be proportional to their conductivity for water vapour, indicating stomatal control of SO2 exchange. Other live surfaces absorbed negligible amounts but considerable uptake occurred on dead twigs bearing lichen and algae.

The results were used to predict that the deposition velocity for SO2 to a pine forest canopy varies from about 0.1 cm s-1 at night to a daytime maximum value of 0.6 cm s-1. The rate of uptake may be an order of magnitude faster when the canopy is wet. Dry deposition of SO2 is probably the major mechanism for sulphur input to forests in Europe.

Language: English
Page range: 445 - 454
Submitted on: Oct 14, 1976
Accepted on: Feb 21, 1977
Published on: Jan 1, 1977
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services

© 1977 J. A. Garland, J. R. Branson, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.