The Vertical Stratification of Air Temperature in the Center of Athens

Georgakis, C; Santamouris, M; Kaisarlis, G

dc.contributor.author	Georgakis, C	en
dc.contributor.author	Santamouris, M	en
dc.contributor.author	Kaisarlis, G	en
dc.date.accessioned	2014-03-01T02:00:46Z
dc.date.available	2014-03-01T02:00:46Z
dc.date.issued	2010	en
dc.identifier.issn	1558-8424	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29131
dc.subject.classification	Meteorology & Atmospheric Sciences	en
dc.subject.other	URBAN HEAT-ISLAND	en
dc.subject.other	VENTILATION PURPOSES	en
dc.subject.other	WIND-SPEED	en
dc.subject.other	UNCERTAINTY ANALYSIS	en
dc.subject.other	CANYONS	en
dc.subject.other	ENVIRONMENT	en
dc.subject.other	GREECE	en
dc.subject.other	MODEL	en
dc.subject.other	CODE	en
dc.subject.other	FLOW	en
dc.title	The Vertical Stratification of Air Temperature in the Center of Athens	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The intraurban temperature variation in the center of Athens, Greece, was investigated in relation to urban geometry. This paper describes two main tasks: 1) Air temperature was recorded in the center of Athens and at the Meteorological Service Station at the University of Athens. Experimental data were collected through extensive monitoring at four different heights inside five different urban canyons in the center of Athens during the summer period. A measurement uncertainty analysis was carried out to estimate critical threshold values of air temperature below which differences were not significant. 2) The correlation between urban-suburban air temperature differences was assessed, using the geometrical characteristics of each urban street canyon. Urban-rural air temperature differences were considered to be not important if they were below the threshold value of 0.3 degrees C. It was concluded that the major factor controlling urban-suburban air temperature differences was the geometry of the urban area. Other factors were the orientation of the observational sites, the current weather conditions, and the inversion of air masses adjacent to the ground level. An increase in the value of aspect ratios leads to a decrease in the difference between air inside the canyons and at the suburban station. The air temperature profile in an open-space area was the most important defining factor for the stratification of the urban-rural air temperature differences.	en
heal.publisher	AMER METEOROLOGICAL SOC	en
heal.journalName	JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY	en
dc.identifier.isi	ISI:000280604200010	en
dc.identifier.volume	49	en
dc.identifier.issue	6	en
dc.identifier.spage	1219	en
dc.identifier.epage	1232	en