Relation between sensible and latent heat fluxes in the Mediterranean and precipitation in the Greek area during winter

Lolis, C. J.; Bartzokas, A.; Katsoulis, B. D.

doi:10.1002/joc.1112

Cited by 45 publications

(39 citation statements)

References 29 publications

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“…17b), being replaced by a negative anomaly of the SST, which can be interpreted by the SST reduction as a result of vigorous evaporative cooling along the bent-back front of a frontal cyclone (Pastor et al 2001). A structure simulating the bent-back front occurred at In the Mediterranean, thermal heat fluxes during winter account for the intensification of the deepening rates of passing cyclones, especially in the southern Adriatic Sea and the Aegean Sea (Shay-El and Alpert 1991; Lolis et al 2004;Kouroutzoglou et al 2012b). However, the impact of these fluxes in the explosive cyclogenesis supported it to evolve depending on the stage of its development and the spatial variations of the fluxes (Kuo and Reed 1988).…”

Section: Low-level Dynamicsmentioning

confidence: 99%

On the dynamics of a case study of explosive cyclogenesis in the Mediterranean

Kouroutzoglou

Flocas

Hatzaki

et al. 2014

Meteorol Atmos Phys

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In this study, a case of explosive cyclogenesis over the central Mediterranean is examined with the aid of the MS Cyclone Detection and Tracking Scheme along with the Vertical Tracing Software and the Parcel Trajectory Software that were developed in Melbourne University, employing a regular 0.5°9 0.5°latitude-longitude grid of the ERA-Interim dataset. It is found that the explosive cyclogenesis occurred as a result of the downward intrusion of high-PV cold stratospheric air into the upper troposphere combined with a low-level warm environment surrounded by the bent-back structure of the cold front in the poleward side of a jet streak. The positive effect of the diabatic processes in explosive cyclogenesis is demonstrated. When cold air masses cross the warmer sea of the central Mediterranean, positive surface sensible and latent heat fluxes generate a low-level warm and moist environment, favorable for convective activity.

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Section: Low-level Dynamicsmentioning

confidence: 99%

On the dynamics of a case study of explosive cyclogenesis in the Mediterranean

Kouroutzoglou

Flocas

Hatzaki

et al. 2014

Meteorol Atmos Phys

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“…According to Wilks (1995), CCA, which could be considered an extension of multiple regression, identifies new variables that maximize the interrelationships between the two original data sets. This statistical method is used widely in climatological studies and is described in detail by (Lolis et al, 2002;Bartzokas et al, 2003;Lolis et al, 2004). In the present study, we plotted the correlation coefficients between the canonical pairs and the two initial variables (500-hPa, precipitation) in order to examine and analyze the similarities and differences of the model's patterns with the patterns of the other data sets.…”

Section: Methods Of Analysismentioning

confidence: 99%

An evaluation of a general circulation model (GCM) and the NCEP–NCAR reanalysis data for winter precipitation in Greece

Τολίκα¹,

Maheras²,

Flocas³

et al. 2006

Intl Journal of Climatology

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In this study, an attempt is made to evaluate winter precipitation data derived from the general circulation model (GCM) -HadAM3P (atmospherical circulation model -Hadley Center) and from the National Center for Environmental Prediction-National Center of Atmospheric Research (NCEP-NCAR) reanalysis project for the period . These data sets are compared on a seasonal basis (winter) with observational data derived from stations over Greece. More specifically, the suitability of their average distributions and their spatial and temporal variability is examined. The methods used are principal component analysis (PCA) and canonical correlation analysis (CCA). The connection between the precipitation data sets and five cyclonic circulation types, from a daily catalogue, is also studied. With respect to the spatial distribution of the mean precipitation amounts, NCEP data show better agreement with the observational data compared to the modeled data. However, both NCEP and HadAM3P values are generally underestimated. Moreover, it seems that the HadAM3P is able to capture and reproduce quite satisfactorily the relationship between the precipitation data and the circulation types, but inadequately simulates the impact of orography and the Aegean Sea. Finally, the links between the precipitation variability in Greece and the European 500 hPa variability given by CCA seem to be fairly well reproduced by the model.

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“…Akdeniz, 2.965.000 km 2' lik yüzey alanıyla gel-git etkisinin sınırlı olduğu, neredeyse kapalı sayılabilecek derin bir deniz konumundadır (Lolis et al, 2004(Lolis et al, : 1803. Doğu ve Batı Akdeniz, Sicilya ve Tunus arasında nispeten sığ boğazlar tarafından ayrılmaktadır.…”

Section: Lodos'un Jenetiği Ve Akdeniz Havzasıunclassified

Türki̇ye De Lodos Un Si̇nopti̇k Kli̇matoloji̇si̇ (Samsun İli̇ Örneği̇)

Şahin¹

2015

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ÖzBu çalışmanın amacı, 31 Ocak -2 Şubat 2015 tarihleri arasında Türkiye'de etkili olan Lodos'un jenetiğini açıklamak, genel özelliklerini belirtmek ve Samsun ilinde genel ve çevresel etkilerini ortaya koymaktır. Bu amaçla, Lodos 'un hakim olduğu günlere ait sinoptik haritalar ile bazı meteorolojik veriler elde edilmiş ve analizleri yapılmıştır. Genel Atmosfer sirkülasyonuna bağlı gelişen yerel rüzgârlar grubunda yer alan Lodos, Akdeniz havzasında gelişen siklonların Türkiye'ye yaklaşmasıyla başlamaktadır. Lodos'un hâkim olduğu günlerde deniz seviyesi basıncı düşmekte, sıcaklık artmakta, hava nemi azalmakta ve kuvvetli rüzgâr, mal ve can kayıplarına yol açabilmekte, ulaşımı olumsuz etkilemektedir.Anahtar Kelimeler: Akdeniz Havzası, Lodos, Samsun, Siklon, Sinoptik. AbstractThe purpose of this study is to explain the genetic of effective Lodos wind between 31 January -2 February 2015, in Turkey, identify general characteristics and to reveal general and environmental impacts in Samsun province. For this purpose, Some meteorological data and analysis were based on synoptic maps of Lodos effective days. Lodos is one of the developing local winds groups which are related to the general circulation of the atmosphere, it begins when the developing cyclones in the Mediterranean basin approach to Turkey. In the Lodos dominated days, the sea level pressure decreases, temperatures increase, humidity decreases and strong winds occur, and thus can lead to loss of lives and properties, and negatively affect the transportation.

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Relation between sensible and latent heat fluxes in the Mediterranean and precipitation in the Greek area during winter

Cited by 45 publications

References 29 publications

On the dynamics of a case study of explosive cyclogenesis in the Mediterranean

On the dynamics of a case study of explosive cyclogenesis in the Mediterranean

An evaluation of a general circulation model (GCM) and the NCEP–NCAR reanalysis data for winter precipitation in Greece

Türki̇ye De Lodos Un Si̇nopti̇k Kli̇matoloji̇si̇ (Samsun İli̇ Örneği̇)

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