Influence of the North Atlantic Oscillation on winter rainfall in Calabria (southern Italy)

Ferrari, Ennio; Caloiero, Tommaso; Coscarelli, Roberto

doi:10.1007/s00704-013-0856-6

Cited by 61 publications

(29 citation statements)

References 39 publications

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“…These trend behaviors in the Euro-Mediterranean area could be related to teleconnection patterns which reflect large-scale changes in the atmospheric wave and influence temperature, rainfall, storm tracks, jet stream location and intensity over vast areas [70,71]. Several past studies [72][73][74] showed the impacts of the North Atlantic Oscillation (NAO) especially in the western Mediterranean area. The influence of the NAO is strongest in winter and early spring.…”

Section: Resultsmentioning

confidence: 97%

Drought Analysis in Europe and in the Mediterranean Basin Using the Standardized Precipitation Index

Caloiero

Veltri²,

Caloiero³

et al. 2018

Water

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Abstract:In this study, drought events over a large area of the Northern Hemisphere, including continental Europe, Ireland, the United Kingdom, and the Mediterranean basin, were analyzed using the Standardized Precipitation Index (SPI) at various times scales (3, 6, 12, and 24 months). To this purpose, the Global Precipitation Climatology Centre (GPCC) Full Data Monthly Product Version 2018 data set, with spatial resolutions of 0.5 • longitude/latitude and for the period 1951-2016, has been used. First, the temporal evolution of the percentage of grid points, falling within the severe and extreme drought categories, has been evaluated. Then, a trend analysis has been performed at a seasonal scale, considering the autumn-winter and the spring-summer periods, and at an annual scale. The results of this paper highlight that the Mediterranean basin and North Africa are the most consistently vulnerable areas showing a general reduction in SPI values especially for the long time scale.

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Section: Resultsmentioning

confidence: 97%

Drought Analysis in Europe and in the Mediterranean Basin Using the Standardized Precipitation Index

Caloiero

Veltri²,

Caloiero³

et al. 2018

Water

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“…Research carried out in the USA [8,9], Australia [10], New Zealand [11], South Africa [12], the United Kingdom [13], and the Mediterranean Basin [14] has highlighted an increase in both daily rainfall intensity and frequency of extreme rainfall events. Some authors have detected a decrease in total annual rainfall [15][16][17][18][19], although an increase in extreme rainfall has also been evidenced [14]. By contrast, other authors [20][21][22] have detected no significant trends in either the number of extreme rainfall events or in rainfall values.…”

Section: : In August Was the Jackal Born; The Rain Fell In September;mentioning

confidence: 99%

Damaging Hydrogeological Events: A Procedure for the Assessment of Severity Levels and an Application to Calabria (Southern Italy)

Caloiero

Pasqua

Petrucci

2014

Water

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A damaging hydrogeological event (DHE) is characterized by two components: a rainfall event and a subsequent damage event, which is the result of floods and landslides triggered by rainfall. The characteristics of both events depend on climatic, geomorphological and anthropogenic factors. In this paper, a methodology to classify the severity of DHEs is presented. A chart which considers indicators of both the damage (Dscore) and the daily rainfall (Rscore) values recorded in the study area is proposed. According to the chart, the events are classified into four types: ordinary events, with low Dscore and Rscore values; extraordinary events, with high Rscore values but low Dscore values; catastrophic events, characterized by non-exceptional rainfall (low Rscore) and severe damage (high Dscore); major catastrophic events, obtained by both high Dscore and Rscore values. Using this approach, the 2013 DHE that occurred in Calabria (Italy) was classified as an ordinary event, when compared to the previous ones, even though the widespread diffusion of damage data induced the perception of high severity damage. The rainfall that triggered this event confirms the negative trend of heavy daily precipitation detected in Calabria, and the damage can be ascribed more to sub-daily than daily rainfall affecting urbanized flood-prone areas. OPEN ACCESSWater 2014, 6 3653

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“…The long-term series that served for the analyses are located in Calabria (South Italy), a geographical region characterized by highly complex precipitation patterns, and extend from the first half of the twentieth century to the first decade of the present century. To date, a number of studies (Brunetti et al 2010;Buttafuoco et al 2011;Capra et al 2006Capra et al , 2009Capra et al , 2013Coscarelli and Caloiero, 2012;Ferrari et al 2013;Niccoli et al 2008) have analyzed the spatial and temporal variation of precipitation within this region. However, to the authors' knowledge, the aspects discussed in the present paper, e.g., the comparison of temporal variability of the R-factor estimated according to both direct procedure and simplified equations, have not been explored in previous investigations.…”

Section: Introductionmentioning

confidence: 97%

Long-term variation of rainfall erosivity in Calabria (Southern Italy)

Capra

Porto

Spada

2015

Theor Appl Climatol

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The changes in rainfall erosivity have been investigated using the rainfall erosivity factor (R) proposed for USLE by Wischmeier and Smith (R W-S ) and some simplified indexes (the Fournier index modified by Arnoldus, F, a regional index spatial independent, R Fr , and a regional index spatial dependent, R Fs ) estimated by indirect approaches. The analysis has been carried out over 48 rainfall stations located in Calabria (Southern Italy) using data collected in the period 1936-2012 and divided in three sub-periods. The series of the erosivity indexes and of some precipitation variables have been analyzed for evidence of trends using standard methods. The simplified indexes suggested a general underestimation of the rainfall erosivity with respect to R W-S . The mean underestimation ranged between 23 and 54 % for R Fr and from 10 to 15 % for R Fs . Both the sign and the magnitude of the trends were different for the different stations depending on the variable and sub-period considered. In general, the erosivity increased during the period 1936-1955 (1 st sub-period) and during the more recent sub-period (1992-2012, 3 rd sub-period), whereas it decreased during 1958-1977 (2 nd sub-period). The evidence of trends was generally higher for R W-S than for R Fr and R Fs . Focusing on the most recent sub-period (3 rd subperiod), all the variables analyzed showed mainly increasing trends but with different magnitude. More particularly, R W-S showed a mean increment of 29 %; F, R Fr and R Fs increased by 11, 15 and 18 %, respectively; the maximum intensity of 0.5-h precipitation increased by 5 %; and the annual precipitation increased by 22 %. Consequently, it remains difficult to define which precipitation variable plays the dominant role in the temporal variation of rainfall erosivity in the region. However, the overall results suggest that the indexes estimated by indirect procedures (F, R Fr , and R Fs ) should be used with caution for climate change analysis, despite they are used for practical purposes considering they are based on easily available information.

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Influence of the North Atlantic Oscillation on winter rainfall in Calabria (southern Italy)

Cited by 61 publications

References 39 publications

Drought Analysis in Europe and in the Mediterranean Basin Using the Standardized Precipitation Index

Drought Analysis in Europe and in the Mediterranean Basin Using the Standardized Precipitation Index

Damaging Hydrogeological Events: A Procedure for the Assessment of Severity Levels and an Application to Calabria (Southern Italy)

Long-term variation of rainfall erosivity in Calabria (Southern Italy)

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