The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM

Weak low level winds in the equatorial region pose a problem in the dispersion and diffusion of local pollutants, particularly, when large-scale vegetation burning causes transboundary haze that lasts for few weeks during which the air quality may deteriorate and cause health problems in the neighb...

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Main Author:	Mastura Mahmud
Format:	Article
Language:	English
Published:	Faculty of Social Sciences and Humanities, UKM,Bangi 2008
Online Access:	http://journalarticle.ukm.my/1603/ http://journalarticle.ukm.my/1603/ http://journalarticle.ukm.my/1603/1/Georafia_4%2C1_%289-19%29.pdf

id	ukm-1603
recordtype	eprints
spelling	ukm-16032016-12-14T06:29:55Z http://journalarticle.ukm.my/1603/ The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM Mastura Mahmud, Weak low level winds in the equatorial region pose a problem in the dispersion and diffusion of local pollutants, particularly, when large-scale vegetation burning causes transboundary haze that lasts for few weeks during which the air quality may deteriorate and cause health problems in the neighbouring countries. This paper investigates the patterns of the low level mesoscale wind flow in Kuala Lumpur in which the patterns of the local equatorial low level wind fields were simulated during the height of the major haze episode of Southeast Asia in September 1997. The backward air trajectories from Kuala Lumpur in Peninsular Malaysia that ended on 17 September 1997 showed that nearly all the wind paths originated from Sumatera at the three pressure height levels of 950, 850 and 700 hPa. The mesoscale wind field patterns that influenced the dispersion of smoke from the burning areas that originated from Sumatera, Indonesia were simulated in this study by utilising the Lagrangian Atmospheric Dispersion Model (LADM). Outputs of the low level wind field patterns generated showed the existence of recirculation of air particles from the diurnal regimes such as the land and sea breezes in addition to the weak prevailing winds across the Kuala Lumpur region during the period when pollution levels were high. The patterns revealed that the weak strength of the local winds did not promote effective dispersion of pollutants advected over the area from transboundary sources a few hundreds of kilometres away Faculty of Social Sciences and Humanities, UKM,Bangi 2008 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/1603/1/Georafia_4%2C1_%289-19%29.pdf Mastura Mahmud, (2008) The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM. Geografia : Malaysian Journal of Society and Space, 4 (1). pp. 9-19. ISSN 2180-2491 http://www.ukm.my/geografia
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Weak low level winds in the equatorial region pose a problem in the dispersion and diffusion of local pollutants, particularly, when large-scale vegetation burning causes transboundary haze that lasts for few weeks during which the air quality may deteriorate and cause health problems in the neighbouring countries. This paper investigates the patterns of the low level mesoscale wind flow in Kuala Lumpur in which the patterns of the local equatorial low level wind fields were simulated during the height of the major haze episode of Southeast Asia in September 1997. The backward air trajectories from Kuala Lumpur in Peninsular Malaysia that ended on 17 September 1997 showed that nearly all the wind paths originated from Sumatera at the three pressure height levels of 950, 850 and 700 hPa. The mesoscale wind field patterns that influenced the dispersion of smoke from the burning areas that originated from Sumatera, Indonesia were simulated in this study by utilising the Lagrangian Atmospheric Dispersion Model (LADM). Outputs of the low level wind field patterns generated showed the existence of recirculation of air particles from the diurnal regimes such as the land and sea breezes in addition to the weak prevailing winds across the Kuala Lumpur region during the period when pollution levels were high. The patterns revealed that the weak strength of the local winds did not promote effective dispersion of pollutants advected over the area from transboundary sources a few hundreds of kilometres away
format	Article
author	Mastura Mahmud,
spellingShingle	Mastura Mahmud, The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM
author_facet	Mastura Mahmud,
author_sort	Mastura Mahmud,
title	The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM
title_short	The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM
title_full	The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM
title_fullStr	The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM
title_full_unstemmed	The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM
title_sort	simulation of low-level equatorial local winds in peninsular malaysia during the haze episode of 1997 through the ladm
publisher	Faculty of Social Sciences and Humanities, UKM,Bangi
publishDate	2008
url	http://journalarticle.ukm.my/1603/ http://journalarticle.ukm.my/1603/ http://journalarticle.ukm.my/1603/1/Georafia_4%2C1_%289-19%29.pdf
first_indexed	2023-09-18T19:33:48Z
last_indexed	2023-09-18T19:33:48Z
_version_	1777405136480501760

The simulation of low-level equatorial local winds in Peninsular Malaysia during the haze episode of 1997 through the LADM

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