Study of size-segregated particle (PM1, PM2.5, PM10) concentrations over Greece

Koulouri, E; Grivas, G; Gerasopoulos, E; Chaloulakou, A; Mihalopoulos, N; Spyrellis, N

dc.contributor.author	Koulouri, E	en
dc.contributor.author	Grivas, G	en
dc.contributor.author	Gerasopoulos, E	en
dc.contributor.author	Chaloulakou, A	en
dc.contributor.author	Mihalopoulos, N	en
dc.contributor.author	Spyrellis, N	en
dc.date.accessioned	2014-03-01T01:57:36Z
dc.date.available	2014-03-01T01:57:36Z
dc.date.issued	2008	en
dc.identifier.issn	1790-7632	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28452
dc.subject	PM10	en
dc.subject	PM2.5	en
dc.subject	submicron particles	en
dc.subject	chemical composition	en
dc.subject	long range transport	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	PARTICULATE MATTER	en
dc.subject.other	MASS CONCENTRATIONS	en
dc.subject.other	GREATER AREA	en
dc.subject.other	ATHENS	en
dc.subject.other	VARIABILITY	en
dc.subject.other	AEROSOLS	en
dc.title	Study of size-segregated particle (PM1, PM2.5, PM10) concentrations over Greece	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	This study reports particulate matter levels of various size fractions (PM10, PM2.5, and PM1) and identify their controlling factors, in various locations over Greece. It combines long-term data sets involving particle concentrations as measured in the island of Crete in the Eastern Mediterranean and the Greater Area of Athens. Measurements were carried out in various sites at urban (Central Athens and Heraklion, Crete), suburban (Lykovrissi, Athens) and natural background (Finokalia, Crete) locations, for a time period extending from 2004 to 2006. annual limit value of 40 mu g m(-3) for PM10 was exceeded on a yearly basis at both of measurement sites in Athens, while frequent exceedances of the 24-h limit value of 50 mu g m(-3) were recorded. Concentration levels of PM2.5 and PM1 were also found elevated, when regarded in perspective to either existing limit values (for PM2.5) or levels reported for other large metropolitan areas (for PM1). In addition even at the background station of Finokalia in Crete, average PM10 concentrations exceeded 30 mu g m(-3). Moreover, at the same station, average concentrations of PM2.5, notably exceed 15 mu g m(-3) (a characteristic value, relative to the LISEPA PM2.5 air quality standard). At all sites coarse particles have been found to comprise a noteworthy portion of total PM10 particles (with PM2.5/PM10 ratios ranging between 45-60%), while fine particle mass concentrations heavily relied on those of particles in the submicron range (PM1/PM2.5 ratios spanning between 55-75%). The short and long-term temporal variability of each fraction were examined and spatial associations were statistically analyzed, in an attempt to identify possible affinities in particle level profiles, effective over a larger regional scale. It has been observed that at several instances, severe particle episodes recorded in the region of Crete have largely affected the Greek mainland and have triggered a response to the monitoring network in Athens. Special focus has been given to events of dust transport from N. Africa, which is found to be more frequent during spring and fall, and during which the PM10 limit value of 50 mu g m(-3) is violated and concentrations of even finer particle fractions are affected. Air mass back trajectories were studied, for episode days during dust transport events. Data of particle chemical composition were utilized, contributing to an initial identification and characterization of major natural and anthropogenic source types, which determine particle concentrations.	en
heal.publisher	GLOBAL NETWORK ENVIRONMENTAL SCIENCE & TECHNOLOGY	en
heal.journalName	GLOBAL NEST JOURNAL	en
dc.identifier.isi	ISI:000257936200002	en
dc.identifier.volume	10	en
dc.identifier.issue	2	en
dc.identifier.spage	132	en
dc.identifier.epage	139	en