Interannual variability of winter precipitation in the European Alps: relations with the North Atlantic Oscillation.

Bartolini, Elisa; Claps, Pierluigi; D’Odorico, Paolo

doi:10.5194/hess-13-17-2009

Cited by 78 publications

(52 citation statements)

References 21 publications

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“…Many studies have reported main components and characteristics of ACPs and their relationships with precipitation on both regional (e.g. Bartolini et al, 2009) and global scale (e.g. Dore, 2005).…”

Section: Introductionmentioning

confidence: 99%

Analysing the variability and trends of precipitation extremes in Finland and their connection to atmospheric circulation patterns

Irannezhad

Chen

Kløve

et al. 2017

Intl Journal of Climatology

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Ten precipitation indices recommended by the Expert Team on Climate Change Detection and Indices were used to analyse spatial distribution and temporal changes in annual amount, intensity, frequency and duration of precipitation statistics based on daily data with a focus on extremes in Finland during 1961–2011. Also, the connections between these high resolution (10 km) precipitation indices and six influential atmospheric circulation patterns (ACPs) for climate variability in Finland were studied. On the country scale, the results suggest significant increases in the amount and intensity of precipitation extremes, more precipitation days, and no clear changes in wet and dry spells. Both intensity and frequency of precipitation extremes over Finland decrease from south and southwest to north. The only exception is the distribution of precipitations days which is generally more frequent over eastern and upper areas of northern Finland. Wet (dry) spells were typically longer in the western (eastern) part of Finland. Significant increases in annual total wet‐day precipitation, very wet days precipitation and simple daily intensity index were found over most parts of Finland during 1961–2011. Increasing trends in both extremely wet days and maximum 1‐day precipitation were mostly observed in western, eastern, central and northern Finland. Such spatial pattern was also identified for significant increases in the frequency of heavy and very heavy precipitation days. The precipitation days increased over small parts of western, eastern and northern Finland. Wet spells showed lengthening trends in several grids over southwestern Finland, while dry spells lengthened in some areas over the entire country except southern parts. These variations in precipitation statistics were found to be significantly correlated with the East Atlantic/West Russia, East Atlantic, Scandinavia and Polar patterns.

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Section: Introductionmentioning

confidence: 99%

Analysing the variability and trends of precipitation extremes in Finland and their connection to atmospheric circulation patterns

Irannezhad

Chen

Kløve

et al. 2017

Intl Journal of Climatology

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“…Effects of ACPs, particularly the NAO, on variations in European precipitation have been reported by many studies (e.g. Türkeş and Erlat, 2003;Uvo, 2003;Bartolini et al, 2009;Jaagus 2009;Irannezhad et al, 2014d).…”

Section: Effects Of Atmospheric Circulationmentioning

confidence: 89%

Wintertime climate factors controlling snow resource decline in Finland

2015

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Numerous studies have reported significant declines in snow resources in Finland and elsewhere during the 20th century. To identify the main climate factors controlling these declines in Finland, this study evaluated long‐term variations and trends in wintertime climate, snowpack hydrological processes (SHPs) and continuous snow cover duration (CSCD), and their links to atmospheric circulation patterns (ACPs). Analyses were conducted using observed daily climatological time series and simulated SHPs at three stations in southern (Kaisaniemi), central (Kajaani) and northern (Sodankylä) Finland with about 100 years of data. The Mann‐Kendall nonparametric test was used to detect significant trends, the Pearson's coefficient (r) to identify relationships within snow‐related variables, and Spearman's coefficient (ρ) to measure correlations of these variables with ACPs. Sensitivity of the snow‐related variables with projected changes in temperature and precipitation was assessed. The results showed increases in wintertime temperature only at Kaisaniemi, but decreases in wintertime precipitation, snowfall and snow water equivalent (SWE) and shorter CSCD at all stations. In general, variations in wintertime temperature were positively associated with the Arctic Oscillation (AO) and the North Atlantic Oscillation (NAO). However, wintertime precipitation showed significant relationships with the East Atlantic/West Russia (EA/WR), AO and West Pacific (WP) patterns in southern, central and northern Finland, respectively. SHPs and CSCD in southern Finland were associated with the same ACP influencing wintertime temperature (AO), and those in central and northern areas with the patterns influencing wintertime precipitation (EA, EA/WR and AO). Thus, declines in snow resources in Finland are mainly the result of reductions in snowfall owing to both wintertime warming and decreased precipitation at Kaisaniemi, while only to decreases in wintertime precipitation at Kajaani and Sodankylä stations. However, increase in precipitation (up to 30%) plays an important role in offsetting effects of temperature warming (up to 4 °C) on snow resource decline in Finland.

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“…In particular, reservoirs are important constituents of power production, as they can react to the electricity consumption variations within seconds and thus ensure sufficient energy supply for adequate network stability. Nevertheless, hydropower production depends on local precipitation, snow coverage, and glacier ice melting, and is therefore subject to important interannual fluctuations [Bartolini et al, 2009;Lambrecht and Mayer, 2009].…”

Section: Introductionmentioning

confidence: 99%

Projections of future water resources and their uncertainty in a glacierized catchment in the Swiss Alps and the subsequent effects on hydropower production during the 21st century

Finger¹,

Heinrich²,

Gobiet³

et al. 2012

Water Resources Research

156

169

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[1] Hydropower accounts for about 20% of the worldwide electrical power production. In mountainous regions this ratio is significantly higher. In this study we present how future projected climatic forcing, as described in regional climate models (RCMs), will affect water resources and subsequently hydropower production in downstream hydropower plants in a glacierized alpine valley (Vispa valley, Switzerland, 778 km 2 ). In order to estimate future runoff generation and hydropower production, we used error-corrected and downscaled climate scenarios from regional climate models (RCMs) as well as glacier retreat projections from a dynamic glacier model and coupled them to a physically based hydrological model. Furthermore, we implemented all relevant hydropower operational rules in the hydrological model to estimate future hydropower production based on the runoff projections. The uncertainty of each modeling component (climate projections, glacier retreat, and hydrological projection) and the resulting propagation of uncertainty to the projected future water availability for energy production were assessed using an analysis of variance. While the uncertainty of the projections is considerable, the consistent trends observed in all projections indicate significant changes to the current situation. The model results indicate that future melt-and rainfall-runoff will increase during spring but decline during summer. The study concludes by outlining the most relevant expected changes for hydropower operations.Citation: Finger, D., G. Heinrich, A. Gobiet, and A. Bauder (2012), Projections of future water resources and their uncertainty in a glacierized catchment in the Swiss Alps and the subsequent effects on hydropower production during the 21st century, Water Resour.

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Interannual variability of winter precipitation in the European Alps: relations with the North Atlantic Oscillation.

Cited by 78 publications

References 21 publications

Analysing the variability and trends of precipitation extremes in Finland and their connection to atmospheric circulation patterns

Analysing the variability and trends of precipitation extremes in Finland and their connection to atmospheric circulation patterns

Wintertime climate factors controlling snow resource decline in Finland

Projections of future water resources and their uncertainty in a glacierized catchment in the Swiss Alps and the subsequent effects on hydropower production during the 21st century

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