Troposheric ozone trend in the Muda irrigation area, Kedah
The ozone trend in the Muda Irrigation Area (MADA), Kedah, Malaysia, was assessed from the ozone data recorded in Su ngai Petani. Three parameters were selected as the robust trend indicators in the study: the monthly mean, the monthly averaged daily 1-h maximum and the number of annual hours >...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Penerbit Universiti Sains Malaysia
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/23542/ http://psasir.upm.edu.my/id/eprint/23542/1/Troposheric%20ozone%20trend%20in%20the%20Muda%20irrigation%20area.pdf |
| _version_ | 1848844786960695296 |
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| author | Ismail, Marzuki Suroto, Azrin Engku Ibrahim, Tengku Azmina Abdullah, Ahmad Makmom |
| author_facet | Ismail, Marzuki Suroto, Azrin Engku Ibrahim, Tengku Azmina Abdullah, Ahmad Makmom |
| author_sort | Ismail, Marzuki |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The ozone trend in the Muda Irrigation Area (MADA), Kedah, Malaysia, was assessed from the ozone data recorded in Su
ngai Petani. Three parameters were selected as the robust trend indicators in the study: the monthly mean, the monthly averaged daily 1-h maximum and the number of annual hours > 120 g/m3. As the ozone data displayed obvious seasonal variation, using deseasonalised monthly average parameters to estimate the ozone trends could smooth out the influence of seasonal fluctuations. In this study, we used the Box-Jenkins methodology to build the Auto-Regressive Integrated Moving Average (ARIMA) model for the monthly ozone data taken from an Automatic Air
Quality Monitoring System in Sungai Petani station for the period between 1999 and 2007, with a total 108 readings. The parametric, seasonally adjusted ARIMA (1, 0, 1) x
(2, 1, 2) 12 model was successfully applied to predict the long-term trend of ozone concentration. The detection of a steady, statistically significant upward trend of ozone
concentration in the area is a concern for human health and agricultural activities. |
| first_indexed | 2025-11-15T08:36:28Z |
| format | Article |
| id | upm-23542 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:36:28Z |
| publishDate | 2011 |
| publisher | Penerbit Universiti Sains Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-235422016-11-29T05:03:49Z http://psasir.upm.edu.my/id/eprint/23542/ Troposheric ozone trend in the Muda irrigation area, Kedah Ismail, Marzuki Suroto, Azrin Engku Ibrahim, Tengku Azmina Abdullah, Ahmad Makmom The ozone trend in the Muda Irrigation Area (MADA), Kedah, Malaysia, was assessed from the ozone data recorded in Su ngai Petani. Three parameters were selected as the robust trend indicators in the study: the monthly mean, the monthly averaged daily 1-h maximum and the number of annual hours > 120 g/m3. As the ozone data displayed obvious seasonal variation, using deseasonalised monthly average parameters to estimate the ozone trends could smooth out the influence of seasonal fluctuations. In this study, we used the Box-Jenkins methodology to build the Auto-Regressive Integrated Moving Average (ARIMA) model for the monthly ozone data taken from an Automatic Air Quality Monitoring System in Sungai Petani station for the period between 1999 and 2007, with a total 108 readings. The parametric, seasonally adjusted ARIMA (1, 0, 1) x (2, 1, 2) 12 model was successfully applied to predict the long-term trend of ozone concentration. The detection of a steady, statistically significant upward trend of ozone concentration in the area is a concern for human health and agricultural activities. Penerbit Universiti Sains Malaysia 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/23542/1/Troposheric%20ozone%20trend%20in%20the%20Muda%20irrigation%20area.pdf Ismail, Marzuki and Suroto, Azrin and Engku Ibrahim, Tengku Azmina and Abdullah, Ahmad Makmom (2011) Troposheric ozone trend in the Muda irrigation area, Kedah. Journal of Physical Science, 22 (2). pp. 87-99. ISSN 1675-3402; ESSN: 2180-4230 http://web.usm.my/jps/22-2.html |
| spellingShingle | Ismail, Marzuki Suroto, Azrin Engku Ibrahim, Tengku Azmina Abdullah, Ahmad Makmom Troposheric ozone trend in the Muda irrigation area, Kedah |
| title | Troposheric ozone trend in the Muda irrigation area, Kedah |
| title_full | Troposheric ozone trend in the Muda irrigation area, Kedah |
| title_fullStr | Troposheric ozone trend in the Muda irrigation area, Kedah |
| title_full_unstemmed | Troposheric ozone trend in the Muda irrigation area, Kedah |
| title_short | Troposheric ozone trend in the Muda irrigation area, Kedah |
| title_sort | troposheric ozone trend in the muda irrigation area, kedah |
| url | http://psasir.upm.edu.my/id/eprint/23542/ http://psasir.upm.edu.my/id/eprint/23542/ http://psasir.upm.edu.my/id/eprint/23542/1/Troposheric%20ozone%20trend%20in%20the%20Muda%20irrigation%20area.pdf |