The main characteristics of atmospheric circulation associated with fog in Greece

Houssos, E. E.; Lolis, C. J.; Bartzokas, A.

doi:10.5194/nhess-9-1857-2009

Cited by 8 publications

(6 citation statements)

References 11 publications

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“…As examples, studies conducted in South Africa (Van Heerden et al, 2010;Van Schalkwyk and Dyson, 2013) on fog occurrence have allowed to improve airport activities at Cape Town. Other studies in the northwestern Greece (Houssos et al, 2009(Houssos et al, , 2012 have also emphasized the importance of previous synoptic analyses as a prerequisite to the installation of passive collecting systems when maximum collecting efficiencies are sought.…”

Section: Discussionmentioning

confidence: 99%

“…Orographic and advection fogs have been quantified and studied in relation to their potential uses, with very few studies attempting to assess the synoptic conditions and large‐scale teleconnection patterns that favour their collection. For instance, only few studies have assessed atmospheric circulation patterns that are most likely favourable for fog harvesting in general (Houssos et al ., , ; Van Schalkwyk, ; Van Schalkwyk and Dyson, ); focused on specific fog collection episodes (Olivier and de Rautenbach, ; Marzol, ; Fedorova et al ., ; Fisak et al ., ; Marzol et al ., ; Valiente et al ., ); or analysed the spatiotemporal variability of fog collection (Johnstone and Dawson, ). However, to our knowledge, there is a lack of research assessing the influence of synoptic and teleconnection patterns on fog‐water collection.…”

Section: Introductionmentioning

confidence: 99%

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Influences of synoptic situation and teleconnections on fog‐water collection in the Mediterranean Iberian Peninsula, 2003–2012

Corell

Estrela

Valiente

et al. 2019

Intl Journal of Climatology

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Fog‐water collection has been widely analysed for its quantification and potential uses; however, there are few studies assessing the synoptic conditions and large‐scale teleconnection patterns that affect its occurrence. Focusing on the Mediterranean Iberian Peninsula, this work aims to analyse the synoptic patterns, both at surface level and 850 hPa geopotential height, that most likely to favour fog‐water collection, and to quantify the relationship between fog‐water collection and the NAOi (North Atlantic Oscillation index), MOi (Mediterranean Oscillation index) as well as WeMOi (Western Mediterranean Oscillation index) teleconnection patterns. For this purpose, daily fog‐water observations from a dense network of 23 fog‐water collectors located along the Mediterranean Iberian Peninsula for 2003–2012 were analysed in relation to synoptic patterns and the three‐teleconnection indices. The major findings are: (a) The most favourable synoptic patterns for fog‐water collection are maritime advections carrying humidity from the Mediterranean basin, and cyclonic circulations, whereas anti‐cyclonic situations generally led to large number of foggy days with low fog‐collection rates. (b) In terms of winds at 850 hPa, the most favourable low‐level flows for fog‐water collection are associated with strong winds (>5.1 m s−1) from the Mediterranean. Atlantic winds generally cause a greater number of fog days than Mediterranean winds, with less fog‐water collection rates. (c) WeMOi has the greatest influence on fog‐water collection, mainly during winter and spring months, with statistically significant negative relationships for most of the stations. MOi also shows a great influence, with a large number of statistically significant negative correlations, mainly during the same months as WeMOi. Lastly, NAOi presented the lowest and no significant negative correlations with fog‐water collection.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influences of synoptic situation and teleconnections on fog‐water collection in the Mediterranean Iberian Peninsula, 2003–2012

Corell

Estrela

Valiente

et al. 2019

Intl Journal of Climatology

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“…The trends of the annual and seasonal mean, as well as the maximum rain intensity, were analyzed. Houssos et al (2009) studied the atmospheric circulation over Europe and the Mediterranean associated with the formation and the dissipation of fog in Greece in the period 1957-2002; 1055 fog events were examined with the application of the S-mode Factor Analysis and k-means Cluster Analysis to the grid point data and as a result, the atmospheric circulations associated with fog events were classified into 10 clusters.…”

Section: Statistical Studiesmentioning

confidence: 99%

Outcomes of the 10th EGU Plinius Conference on Mediterranean Storms (2008)

Michaelides¹,

Savvidou²,

Orphanou³

et al. 2011

Nat. Hazards Earth Syst. Sci.

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“…Recently, in a detailed historical essay, Lewis et al (2004) reviewed the most important studies on fog made by the UK and the United States scientific community in the previous century. Greek Meteorologists and Climatologists have also done a remarkable effort on studying and forecasting fog events for the eastern Mediterranean, either by using mathematical models (Angouridakis and Flocas, 1983;Charantonis, 1998) or by investigating the local meteorological parameters and the synoptic conditions favouring fog (Angouridakis, 1973;Charantonis and Fotiadis, 1998;Anthis and Cracknell, 1999;Houssos et al, 2009;Stolaki et al, 2009). Most of these studies deal with fog in the coastal cities of Athens and Thessaloniki, the most populated cities in Greece.…”

Section: Introductionmentioning

confidence: 99%

On the atmospheric circulation characteristics associated with fog in Ioannina, north‐western Greece

Houssos

Lolis

Gkikas

et al. 2011

Intl Journal of Climatology

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The evolution of the atmospheric circulation over Europe and the Mediterranean during fog events in Ioannina, north-western Greece, is examined for the period 1957-2002. A 24-h period starting at 12 : 00 UTC is defined as a fog day, when at least one of the present and/or past weather codes of the corresponding SYNOPs refers to fog. A sequence of such fog days is defined as a fog event. In total, 1019 fog events are found during the period under study. A methodology scheme using S-mode factor analysis and K-means cluster analysis is applied to the patterns of 850 hPa air temperature and 1000 and 500 hPa geopotential heights for the day before the initiation, the first day of occurrence and the day after the dissipation of fog, resulting in the classification of the 1019 fog events into ten clusters. For each one of the ten clusters, the mean 00 : 00 UTC patterns of the above parameters are constructed for 3 days. These patterns correspond to the evolution of the atmospheric circulation associated with fog formation and dissipation in the Ioannina region. Most of the patterns are characterized by anticyclonic activity or a weak southerly flow over Greece. The differences among the ten clusters refer mainly to the position and the intensity of the surface and upper air synoptic systems involved.

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The main characteristics of atmospheric circulation associated with fog in Greece

Abstract: Abstract. The characteristics of the atmospheric circulation over Europe and the Mediterranean associated with the formation and the dissipation of fog in Greece are examined.

Cited by 8 publications

References 11 publications

Influences of synoptic situation and teleconnections on fog‐water collection in the Mediterranean Iberian Peninsula, 2003–2012

Influences of synoptic situation and teleconnections on fog‐water collection in the Mediterranean Iberian Peninsula, 2003–2012

Outcomes of the 10th EGU Plinius Conference on Mediterranean Storms (2008)

On the atmospheric circulation characteristics associated with fog in Ioannina, north‐western Greece

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