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Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand

The aerodynamic gradient method was applied to estimate dry deposition flux of SO2 over dry deciduous forest in Nakorn Ratchasima province, Thailand. The meteorological parameters and concentrations of SO2 were measured in real time for one year on the experimental tower at 36 and 27 m high. The flu...

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Main Authors: Phuvasa Chanonmuang,, Pojanie Khummongkol,, Kazuhide Matsuda,
Format: Article
Language:English
Published: Universiti Kebangsaan Malaysia 2015
Online Access:http://journalarticle.ukm.my/8473/1/02_Phuvasa.pdf
http://journalarticle.ukm.my/8473/
http://www.ukm.my/jsm/
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spelling my-ukm.journal.84732016-12-14T06:47:17Z http://journalarticle.ukm.my/8473/ Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand Phuvasa Chanonmuang, Pojanie Khummongkol, Kazuhide Matsuda, The aerodynamic gradient method was applied to estimate dry deposition flux of SO2 over dry deciduous forest in Nakorn Ratchasima province, Thailand. The meteorological parameters and concentrations of SO2 were measured in real time for one year on the experimental tower at 36 and 27 m high. The flux observed in the wet season were found two times higher than the value observed in the dry seasons, i.e. 20±7.58 and 10±11.05 ng m-2 s-1, respectively. The leaf area index and the ambient humidity were believed to assert the rate of SO2 deposition. The average friction velocities were estimated to be 0.26±0.02 and 0.48±0.06 m s–¹, for the dry and the wet season, respectively. The friction velocity was very much depended on the surface roughness of the forest canopy. The Vd of SO2 evaluated by the aerodynamic gradient was compared with Vd calculated by the resistance model. It was found that the observed Vd was in close proximity with the model prediction in daytime in all conditions, i.e. wet, dry and annual average. The annual average Vd determined by the Aerodynamic gradient was 0.43±0.06 cm s-1. Universiti Kebangsaan Malaysia 2015-03 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/8473/1/02_Phuvasa.pdf Phuvasa Chanonmuang, and Pojanie Khummongkol, and Kazuhide Matsuda, (2015) Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand. Sains Malaysiana, 44 (3). pp. 317-323. ISSN 0126-6039 http://www.ukm.my/jsm/
institution Universiti Kebangsaan Malaysia
building Perpustakaan Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description The aerodynamic gradient method was applied to estimate dry deposition flux of SO2 over dry deciduous forest in Nakorn Ratchasima province, Thailand. The meteorological parameters and concentrations of SO2 were measured in real time for one year on the experimental tower at 36 and 27 m high. The flux observed in the wet season were found two times higher than the value observed in the dry seasons, i.e. 20±7.58 and 10±11.05 ng m-2 s-1, respectively. The leaf area index and the ambient humidity were believed to assert the rate of SO2 deposition. The average friction velocities were estimated to be 0.26±0.02 and 0.48±0.06 m s–¹, for the dry and the wet season, respectively. The friction velocity was very much depended on the surface roughness of the forest canopy. The Vd of SO2 evaluated by the aerodynamic gradient was compared with Vd calculated by the resistance model. It was found that the observed Vd was in close proximity with the model prediction in daytime in all conditions, i.e. wet, dry and annual average. The annual average Vd determined by the Aerodynamic gradient was 0.43±0.06 cm s-1.
format Article
author Phuvasa Chanonmuang,
Pojanie Khummongkol,
Kazuhide Matsuda,
spellingShingle Phuvasa Chanonmuang,
Pojanie Khummongkol,
Kazuhide Matsuda,
Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand
author_facet Phuvasa Chanonmuang,
Pojanie Khummongkol,
Kazuhide Matsuda,
author_sort Phuvasa Chanonmuang,
title Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand
title_short Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand
title_full Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand
title_fullStr Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand
title_full_unstemmed Dry deposition of SO2 over Dry Dipterocarp Forest, Thailand
title_sort dry deposition of so2 over dry dipterocarp forest, thailand
publisher Universiti Kebangsaan Malaysia
publishDate 2015
url http://journalarticle.ukm.my/8473/1/02_Phuvasa.pdf
http://journalarticle.ukm.my/8473/
http://www.ukm.my/jsm/
_version_ 1643737476302372864
score 13.211869

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