Scaling and persistence of ozone concentrations in Klang Valley, Malaysia
The aim of this paper is to describe the characteristics of ozone concentration based on the value of Hurst coefficient. The Hurst coefficient, denoted as H, is used to explain the long-term degree of persistency in ozone concentration in Malaysia. This paper investigates the scaling properties and...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | en |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2013
|
| Online Access: | http://journalarticle.ukm.my/6482/1/jqma-9-1-paper2.pdf http://journalarticle.ukm.my/6482/ http://www.ukm.my/jqma/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1831355841220968448 |
|---|---|
| author | Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin, |
| author_facet | Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin, |
| author_sort | Muzirah Musa, |
| building | Tun Sri Lanang Library |
| collection | Institutional Repository |
| content_provider | Universiti Kebangsaan Malaysia |
| content_source | UKM Journal Article Repository |
| continent | Asia |
| country | Malaysia |
| description | The aim of this paper is to describe the characteristics of ozone concentration based on the value of Hurst coefficient. The Hurst coefficient, denoted as H, is used to explain the long-term degree of persistency in ozone concentration in Malaysia. This paper investigates the scaling properties and persistency of ozone concentrations at six selected air quality monitoring stations in Klang Valley, Malaysia. Daily mean for the hourly data of ozone concentration from 1998-2006 is considered in this study. In describing the statistical properties, several related statistics are identified and the autocorrelation
functions of the observed data were plotted. The anomaly method is used to deseasonalise the seasonal variation and the natural non-stationary of the data. Next, the persistency of ozone concentration is determined by using the scaling analysis, namely Dispersional Ratio Method. This method considers two dispersion measures, that is the range and variance. The result shows that there are two different scaling regions, separated by a critical time scale, ncwhich is approximately 90 days. For shorter time scale (n <nc), the ozone concentration persists and the concentration is high on higher time scale (n >nc)where the H values are between 0.5 < H < 1 at all monitoring stations. These findings provide information on scaling behaviour and persistence in ozone concentration in the
ambient air of Klang Valley, Malaysia. |
| format | Article |
| id | my-ukm.journal-6482 |
| institution | Universiti Kebangsaan Malaysia |
| language | en |
| publishDate | 2013 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| record_format | eprints |
| spelling | my-ukm.journal-64822016-12-14T06:41:18Z http://journalarticle.ukm.my/6482/ Scaling and persistence of ozone concentrations in Klang Valley, Malaysia Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin, The aim of this paper is to describe the characteristics of ozone concentration based on the value of Hurst coefficient. The Hurst coefficient, denoted as H, is used to explain the long-term degree of persistency in ozone concentration in Malaysia. This paper investigates the scaling properties and persistency of ozone concentrations at six selected air quality monitoring stations in Klang Valley, Malaysia. Daily mean for the hourly data of ozone concentration from 1998-2006 is considered in this study. In describing the statistical properties, several related statistics are identified and the autocorrelation functions of the observed data were plotted. The anomaly method is used to deseasonalise the seasonal variation and the natural non-stationary of the data. Next, the persistency of ozone concentration is determined by using the scaling analysis, namely Dispersional Ratio Method. This method considers two dispersion measures, that is the range and variance. The result shows that there are two different scaling regions, separated by a critical time scale, ncwhich is approximately 90 days. For shorter time scale (n <nc), the ozone concentration persists and the concentration is high on higher time scale (n >nc)where the H values are between 0.5 < H < 1 at all monitoring stations. These findings provide information on scaling behaviour and persistence in ozone concentration in the ambient air of Klang Valley, Malaysia. Penerbit Universiti Kebangsaan Malaysia 2013-07 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/6482/1/jqma-9-1-paper2.pdf Muzirah Musa, and Abdul Aziz Jemain, and Wan Zawiah Wan Zin, (2013) Scaling and persistence of ozone concentrations in Klang Valley, Malaysia. Journal of Quality Measurement and Analysis, 9 (1). pp. 9-20. ISSN 1823-5670 http://www.ukm.my/jqma/ |
| spellingShingle | Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin, Scaling and persistence of ozone concentrations in Klang Valley, Malaysia |
| title | Scaling and persistence of ozone concentrations in Klang Valley, Malaysia |
| title_full | Scaling and persistence of ozone concentrations in Klang Valley, Malaysia |
| title_fullStr | Scaling and persistence of ozone concentrations in Klang Valley, Malaysia |
| title_full_unstemmed | Scaling and persistence of ozone concentrations in Klang Valley, Malaysia |
| title_short | Scaling and persistence of ozone concentrations in Klang Valley, Malaysia |
| title_sort | scaling and persistence of ozone concentrations in klang valley, malaysia |
| url | http://journalarticle.ukm.my/6482/1/jqma-9-1-paper2.pdf http://journalarticle.ukm.my/6482/ http://www.ukm.my/jqma/ |
| url_provider | http://journalarticle.ukm.my/ |