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...

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Main Authors:	Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2013
Online Access:	http://journalarticle.ukm.my/6482/ http://journalarticle.ukm.my/6482/ http://journalarticle.ukm.my/6482/1/jqma-9-1-paper2.pdf

id	ukm-6482
recordtype	eprints
spelling	ukm-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/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
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
author	Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin,
spellingShingle	Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin, Scaling and persistence of ozone concentrations in Klang Valley, Malaysia
author_facet	Muzirah Musa, Abdul Aziz Jemain, Wan Zawiah Wan Zin,
author_sort	Muzirah Musa,
title	Scaling and persistence of ozone concentrations in Klang Valley, Malaysia
title_short	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_sort	scaling and persistence of ozone concentrations in klang valley, malaysia
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2013
url	http://journalarticle.ukm.my/6482/ http://journalarticle.ukm.my/6482/ http://journalarticle.ukm.my/6482/1/jqma-9-1-paper2.pdf
first_indexed	2023-09-18T19:47:02Z
last_indexed	2023-09-18T19:47:02Z
_version_	1777405969347641344

Scaling and persistence of ozone concentrations in Klang Valley, Malaysia

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