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

J. A. Garland; J. R. Branson

doi:10.3402/tellusa.v29i5.11377

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

Tellus

Volume 29 (1977): Issue 5

By: J. A. Garland and J. R. Branson

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.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v29i5.11377 | Journal eISSN: 3035-9554

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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.

Volume 29 (1977): Issue 5