The relevance of the North-Sea Caspian Pattern (NCP) in explaining  temperature variability in Europe and the Mediterranean

Brunetti, Michele; Kutiel, H.

doi:10.5194/nhess-11-2881-2011

Cited by 35 publications

(33 citation statements)

References 36 publications

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“…Also, the impact of the NCPI on summer temperatures over all regions is less pronounced compared to winter temperatures. The results are in agreement with Brunetti and Kutiel (2011) who found a negative correlation between temperature and NCPI over the southeastern Mediterranean basin. It can be seen from Table 8 that the NCPI presents better correlations than the NAO or the AO.…”

Section: Effects Of Atmospheric Circulations On Mean Temperaturesupporting

confidence: 94%

Recent trend analysis of mean air temperature in Greece based on homogenized data

Mamara

Argiriou

Anadranistakis³

2015

Theor Appl Climatol

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Numerous studies analyze the temperature variations in the Mediterranean area due to the anticipated impact of climate change in this part of the world. A number of studies examined the temperature climate in Greece, but few are based on a large number of synoptic stations covering all regions and climatic zones and even fewer are based on homogenized data set series, despite the fact that climatological studies must use high-quality homogeneous data series. The present work reviews previous studies dealing with climatic changes in Greece and addresses changes of mean air temperature, based on a large set of homogenized data from 52 synoptic stations.

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Section: Effects Of Atmospheric Circulations On Mean Temperaturesupporting

confidence: 94%

Recent trend analysis of mean air temperature in Greece based on homogenized data

Mamara

Argiriou

Anadranistakis³

2015

Theor Appl Climatol

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“…The first with negative anomalies covers the Baltic and extends from the southwest to the northeast, and the second one with positive anomalies is located over the Caspian Sea. This pattern resembles greatly the negative phase of the North SeaCaspian Pattern (NCP) teleconnection (Brunetti and Kutiel, 2011), which is responsible for the strong southwest current over the eastern Mediterranean and the Balkans, resulting in intense positive temperature anomalies (Kutiel et al, 2002). In September, the atmospheric conditions differ compared to October due to the fact that the negative pole is shifted to the northwest and extends from west to east, covering parts of Greenland.…”

Section: Characteristics Of the Atmospheric Circulation During The Wamentioning

confidence: 81%

“…For both cases and at all the geopotential levels, a southwesterly flow (transfer of air masses from the Sahara) is apparent over the Balkan Peninsula and the Greek region, mainly responsible for the high temperatures in our country (Maheras, 1982). As in the case of the low winter temperatures, the prevalence of the two teleconnections (NCP and EMP) is probably due to several different factors (meteorological and geographical), the temporal cascade of which is very difficult to investigate compared to the cold period one (Hatzaki et al (2007(Hatzaki et al ( , 2009), Brunetti and Kutiel, 2011). In previous research it was pointed out that temperatures in the equatorial Pacific ranged from neutral (April, June and SeptemberNovember) to above normal (July-August).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

The anomalous low and high temperatures of 2012 over Greece – an explanation from a meteorological and climatological perspective

Τολίκα

Maheras

Pytharoulis

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. 2012 was the hottest year in Greece on the basis of the available record dating back to 1958, displaying at the same time the widest annual temperature range. During the summer and autumn months, numerous regions in the domain of study experienced record-breaking maximum and minimum temperatures. Conversely, the winter period was particularly cold and January one of the coldest months over the last 55 yr. The analysis of the cold period indicates that the synoptic conditions resemble the positive phase of the Eastern Mediterranean Pattern (EMP). The predominance of these cool conditions seems to be related primarily to an intense NNW or NNE atmospheric circulation, as a consequence of the positive EMP phase. Moreover, the reduction in the floating sea ice emerges as a key driver of the formation of a low-pressure pattern and the reinforcement of the trough south of Scandinavia, which in turn strengthened the Siberia High east of the trough. This reinforcement resulted in a blocking pattern and in favorable conditions for the EMP formation. The atmospheric circulation during the prolonged high-temperature period resembles, respectively, the negative phase of North Sea-Caspian Pattern teleconnection. The observed positive pole, in conjunction with the strong southwestern circulation, results in temperature increases and in the development of a smooth pressure field that contributes to the weakening of the Etesian winds and therefore to calm conditions over the continental areas.

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“…The negative phase of this index is associated to a cyclonic circulation around the North Sea and to an anticyclonic regime around the Caspian; because of this pattern, an intensification of southern flow in the regions that lie between North Sea and Caspian is observed (Brunetti and Kutiel, 2011). The positive phase determined an opposite atmospheric pattern, which enhances a northerly circulation.…”

Section: Teleconnection Pattersmentioning

confidence: 99%

“…Those indices have been selected according to their relevant influence on Mediterranean temperature regime, not only in terms of mean air temperature (e.g. Glowienka-Hense, 1990;Slonosky et al, 2001;Hatzaki et al, 2009;Brunetti and Kutiel, 2011), but also of extreme temperature values (e.g. Santos and Corte-Real, 2006;Andrade et al 2012).…”

Section: Teleconnection Pattersmentioning

confidence: 99%

Detection of heat and cold waves in Montevergine time series (1884–2015)

Capozzi¹,

Budillon²

2017

Adv. Geosci.

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Abstract. In recent years, extreme events related to cooling and heating have taken high resonance, motivating the scientific community to carry out an intensive research activity, aimed to detect their variability and frequency. In this work, we have investigated about the frequency, the duration, the severity and the intensity of heat and cold waves in a Southern Italy high-altitude region, by analysing the climatological time series collected in Montevergine observatory. Following the guidelines provided by CLIVAR project (Climate and Ocean Variability, Predictability and Change), we have adopted indicators based on percentiles and duration to define a heat wave and cold event.Main results have highlighted a strong and significant positive trend in the last 40 years in heat waves frequency, severity and intensity. On the contrary, in recent decades, cold wave events have exhibited a significant and positive trend only in intensity. Moreover, through the usage of two Wavelet Analysis tools, the Cross Wavelet Transform and the Wavelet Coherence, we have investigated about the connections between the extreme temperature events occurred in Montevergine and the large-scale atmospheric patterns. The heat wave events have exhibited relevant relationships with the Western European Zonal Circulation and the North Atlantic Oscillation, whereas the variability of cold wave events have shown linkages with the Eastern Mediterranean Pattern and the North Sea Caspian Pattern. In addition, the main features of synoptic patterns that have caused summer heat waves and winter cold waves in Montevergine site are presented.

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The relevance of the North-Sea Caspian Pattern (NCP) in explaining temperature variability in Europe and the Mediterranean

Cited by 35 publications

References 36 publications

Recent trend analysis of mean air temperature in Greece based on homogenized data

Recent trend analysis of mean air temperature in Greece based on homogenized data

The anomalous low and high temperatures of 2012 over Greece – an explanation from a meteorological and climatological perspective

Detection of heat and cold waves in Montevergine time series (1884–2015)

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