Next Article in Journal
Characteristics of Carbonaceous Aerosol in PM2.5 at Wanzhou in the Southwest of China
Next Article in Special Issue
Atmospheric Dispersion Modelling and Spatial Analysis to Evaluate Population Exposure to Pesticides from Farming Processes
Previous Article in Journal
Typhoon Effect on Kuroshio and Green Island Wakes: A Modelling Study
Previous Article in Special Issue
Estimating the Biogenic Non-Methane Hydrocarbon Emissions over Greece
Open AccessArticle

Observations of Local Meteorological Variability under Large-Scale Circulation Patterns over Athens, Greece

1
Construction Management and Engineering, University of Reading, Reading RG66DF, UK
2
Department of Physics, Section of Environmental Physics and Meteorology, University of Athens, 15784 Athens, Greece
3
Sigma Business Network, 11741 Athens, Greece
*
Author to whom correspondence should be addressed.
Atmosphere 2018, 9(1), 25; https://doi.org/10.3390/atmos9010025
Received: 30 November 2017 / Revised: 12 January 2018 / Accepted: 18 January 2018 / Published: 23 January 2018
(This article belongs to the Special Issue Advances in Atmospheric Physics: Selected Papers from CEST2017)
Linking synoptic circulation patterns to specific environmental problems is of significance in the Eastern Mediterranean region, which is characterized by increased seasonal climatic variability and a wealth of distinct weather patterns. This study aims to discuss the links between synoptic scale circulation, intra-day variability and sub-hourly temperature changes over Athens. Diurnal cycles of surface atmospheric variability were examined by applying Principal Component Analysis and Integral Quantities Analysis to a four months data set with surface meteorological elements. Sub-hourly temperature changes were identified by applying a simple linear technique. Principal Components, Integral Quantities and temperature change rates (geometric structures) were related with synoptic circulation categories. It was found that the presence of a Closed Low over the area results in intense along-mountain flows, whilst, after the passage of a trough, when a strong northwesterly flow is established over the area, surface recirculation flows develop. On 64% of the days, geometric structures were observed in the hourly temperature time-series, and they were found to occur across all synoptic situations. Cliff—ramps was the most common geometric structure, and step changes were found to be related with recirculation flows. View Full-Text
Keywords: synoptic circulation patterns; mesoscale flows; geometric structures; recirculation synoptic circulation patterns; mesoscale flows; geometric structures; recirculation
Show Figures

Figure 1

MDPI and ACS Style

Halios, C.H.; Flocas, H.A.; Helmis, C.G.; Asimakopoulos, D.N.; Mouschouras, P.G. Observations of Local Meteorological Variability under Large-Scale Circulation Patterns over Athens, Greece. Atmosphere 2018, 9, 25.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop