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Article: Analysis of the pH of daily rainfall at a rural site in Hong Kong, 1989-1993

TitleAnalysis of the pH of daily rainfall at a rural site in Hong Kong, 1989-1993
Authors
KeywordsAcid Rain Climatology
Daily Rainfall Ph-Distribution
Data Analysis
Hong Kong Rainwater
Monthly Distribution Of Ph
Population Statistics Of Rainfall Ph
Issue Date1995
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv
Citation
Science of the Total Environment, 1995, v. 159 n. 2-3, p. 177-183 How to Cite?
AbstractDaily bulk precipitation samples have been collected and their pH measured since April 1989 at a rural site, Kadoorie Agricultural Research Centre (KARC), in the central New Territories, Hong Kong. The frequency distribution of this population (N = 470) indicates a quasi-log normal distribution up until December, 1993. This is perhaps one of the longest daily pH-records available and it has climatological significance for the future. The annual median and the running, volume-weighted pH values (year end) are presented and they indicate collectively an annually oscillating pattern for which there is no obvious explanation at present. The annual volume-weighted pH values for 1990-1993 are 4.53, 4.30, 5.04 and 4.32 and the corresponding running volume-weighted pH values are 4.53, 4.39, 4.57 and 4.50. Most of the daily observations indicate acidity on the Sorensen scale as expected, and there appears to be no seasonal pattern to pH or amount of rainfall. Also, the volume of rainfall appears to exhibit no simple relationship with the acidity of the rainfall. On the other hand, there is, apparently an anthropogenic component of acid in Hong Kong if the increase in free hydrogen ion concentration measured at the site is not entirely due to orographic reduction of alkaline dust present at relatively lower elevations in Hong Kong. Thus, there is some evidence that in contrast to the volume-weighted pH in the mid-4's at Kadoorie, the pH of local background rainfall in the territory of Hong Kong may be ~ 4.8, while that of regional background (unpolluted) rainfall is probably bracketed by pH ~ 5-5.5.
Persistent Identifierhttp://hdl.handle.net/10722/157791
ISSN
2015 Impact Factor: 3.976
2015 SCImago Journal Rankings: 1.702
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSequeira, Ren_US
dc.contributor.authorPeart, MRen_US
dc.date.accessioned2012-08-08T08:55:41Z-
dc.date.available2012-08-08T08:55:41Z-
dc.date.issued1995en_US
dc.identifier.citationScience of the Total Environment, 1995, v. 159 n. 2-3, p. 177-183en_US
dc.identifier.issn0048-9697en_US
dc.identifier.urihttp://hdl.handle.net/10722/157791-
dc.description.abstractDaily bulk precipitation samples have been collected and their pH measured since April 1989 at a rural site, Kadoorie Agricultural Research Centre (KARC), in the central New Territories, Hong Kong. The frequency distribution of this population (N = 470) indicates a quasi-log normal distribution up until December, 1993. This is perhaps one of the longest daily pH-records available and it has climatological significance for the future. The annual median and the running, volume-weighted pH values (year end) are presented and they indicate collectively an annually oscillating pattern for which there is no obvious explanation at present. The annual volume-weighted pH values for 1990-1993 are 4.53, 4.30, 5.04 and 4.32 and the corresponding running volume-weighted pH values are 4.53, 4.39, 4.57 and 4.50. Most of the daily observations indicate acidity on the Sorensen scale as expected, and there appears to be no seasonal pattern to pH or amount of rainfall. Also, the volume of rainfall appears to exhibit no simple relationship with the acidity of the rainfall. On the other hand, there is, apparently an anthropogenic component of acid in Hong Kong if the increase in free hydrogen ion concentration measured at the site is not entirely due to orographic reduction of alkaline dust present at relatively lower elevations in Hong Kong. Thus, there is some evidence that in contrast to the volume-weighted pH in the mid-4's at Kadoorie, the pH of local background rainfall in the territory of Hong Kong may be ~ 4.8, while that of regional background (unpolluted) rainfall is probably bracketed by pH ~ 5-5.5.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenven_US
dc.relation.ispartofScience of the Total Environmenten_US
dc.rightsScience of the Total Environment. Copyright © Elsevier BV.-
dc.subjectAcid Rain Climatologyen_US
dc.subjectDaily Rainfall Ph-Distributionen_US
dc.subjectData Analysisen_US
dc.subjectHong Kong Rainwateren_US
dc.subjectMonthly Distribution Of Phen_US
dc.subjectPopulation Statistics Of Rainfall Phen_US
dc.titleAnalysis of the pH of daily rainfall at a rural site in Hong Kong, 1989-1993en_US
dc.typeArticleen_US
dc.identifier.emailPeart, MR: mrpeart@hkucc.hku.hken_US
dc.identifier.authorityPeart, MR=rp00612en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/0048-9697(95)04333-Ven_US
dc.identifier.scopuseid_2-s2.0-0028848860en_US
dc.identifier.hkuros11475-
dc.identifier.volume159en_US
dc.identifier.issue2-3en_US
dc.identifier.spage177en_US
dc.identifier.epage183en_US
dc.identifier.isiWOS:A1995QD60200009-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridSequeira, R=7005141855en_US
dc.identifier.scopusauthoridPeart, MR=7003362850en_US
dc.customcontrol.immutablesml 130419-

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