On the variations of sunshine duration in Austria

Dobesch, H.

doi:10.1007/bf00866445

Cited by 17 publications

(12 citation statements)

References 6 publications

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“…The results presented in the study confirm the slightly downward trends in annual sunshine duration observed in other places, e.g. in Central and South-Eastern Europe (Brázdil et al 1994), in the Czech Republic (Bednar 1990), in Slovakia (Horecka 1990), in Germany (Weber 1990), in Austria (Dobesch 1992), in Spain (Sanchez-Lorenzo et al 2007), in India (Jhajharia and Singh 2011) and in Poland (Morawska-Horawska 1984, 1985Dubicka 1997;Matuszko 2014). Weber (1990) found no statistical relationships between sunshine duration trends and changes in other meteorological parameters.…”

Section: Introductionsupporting

confidence: 86%

“…Auer et al (1990), basing their study on data from the Sonnblick station in the Alps, found a positive correlation between sunshine duration on the one hand and air temperature and atmospheric pressure trends on the other. Dobesch (1992) found a correlation between the annual total of sunshine duration and absolute altitude-an increase of 0.7 h/100 m in the zone above 900 m a.s.l. Additionally, he noted that sunshine duration variance was the lowest in the 900-m a.s.l.…”

Section: Introductionmentioning

confidence: 89%

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Sunshine duration and its variability in the main ridge of the Karkonosze Mountains in relation to with atmospheric circulation

Urban

Migała

Pawliczek

2017

Theor Appl Climatol

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Sunshine duration analysis was based on a series of measurements spanning the period from 1901 to 2014 for Śnieżka (1603 m a.s.l.) and from 1961 to 2000 for Szrenica (1362 m a.s.l.). The average annual sunshine duration (SD) on Śnieżka is 1423.0 h, which is among the lowest values in Poland. On average, the main ridge of the Karkonosze range receives 31% of potential sunshine duration in annual terms: from 25% in December to 36% in August and May. The changes in sunshine duration recorded on Śnieżka point to the existence of two cycles: a short one of approx. 2-4 years and a long one of approx. 60 years. The former most probably reflects the rhythm of atmospheric circulation in the North Atlantic (North Atlantic Oscillation), while the latter reflects the impact of ocean circulation associated with the AMO (Atlantic Multidecadal Oscillation) mechanism. Annual SD totals for the years 1901-2014 exhibit a slight trend to an increase of approx. 2.5 h/10 years, and the rate of increase during the winter quarter is many times higher than during the other seasons. Average monthly sunshine duration differences between Śnieżka and Szrenica are positive for all months of the year with the average monthly difference being 10 to 11 h. This means that the average radiation conditions on Śnieżka are more favourable than the main ridge of the Karkonosze range, which lies at an altitude 200 to 250 m lower. Average daily sunshine durations recorded on Śnieżka are only shorter than those on Szrenica for macro-types of atmospheric circulation with advection from the south.

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Section: Introductionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 89%

Sunshine duration and its variability in the main ridge of the Karkonosze Mountains in relation to with atmospheric circulation

Urban

Migała

Pawliczek

2017

Theor Appl Climatol

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“…Similar studies have been carried out in different parts of the world over various periods (e.g. Rahimzadeh et al, 2014;Dobesch, 1992;Kitsara et al, 2013;Angell, 1990;Stanhill and Cohen, 2005). The results from these studies indicate existence of trends at different spatial and temporal scales.…”

Section: Introductionsupporting

confidence: 70%

The Spatial and Temporal Variability of Sunshine Hours in Nigeria (1961 - 2012)

Amadi¹,

Udo²,

Ewona³

2014

IOSRJAP

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“…Since 1981, the HS has been the standard sensor for SD measurements within the TAWES network of ZAMG in Austria. Comparisons of SD totals from CS and HS instruments (Aguilar et al 2003;Dobesch 1992;Mohr 2012;Schöner and Mohnl 1999) at selected Austrian monitoring sites showed considerable differences among SD totals of these instruments (of both positive and negative signs) and an altitude dependency of the sign of the difference. To the knowledge of the authors to date, no systematic long-term comparison of HS records with those of other automated systems is available.…”

Section: Haenni Solar 111b Sunshine Sensormentioning

confidence: 99%

A comparison of long-term parallel measurements of sunshine duration obtained with a Campbell-Stokes sunshine recorder and two automated sunshine sensors

Baumgartner

Pötzi

Freislich

et al. 2017

Theor Appl Climatol

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In recent decades, automated sensors for sunshine duration (SD) measurements have been introduced in meteorological networks, thereby replacing traditional instruments, most prominently the Campbell-Stokes (CS) sunshine recorder. Parallel records of automated and traditional SD recording systems are rare. Nevertheless, such records are important to understand the differences/similarities in SD totals obtained with different instruments and how changes in monitoring device type affect the homogeneity of SD records. This study investigates the differences/similarities in parallel SD records obtained with a CS and two automated SD sensors between 2007 and 2016 at the Kanzelhöhe Observatory, Austria. Comparing individual records of daily SD totals, we find differences of both positive and negative sign, with smallest differences between the automated sensors. The larger differences between CS-derived SD totals and those from automated sensors can be attributed (largely) to the higher sensitivity threshold of the CS instrument. Correspondingly, the closest agreement among all sensors is found during summer, the time of year when sensitivity thresholds are least critical.Furthermore, we investigate the performance of various models to create the so-called sensor-type-equivalent (STE) SD records. Our analysis shows that regression models including all available data on daily (or monthly) time scale perform better than simple three-(or four-) point regression models. Despite general good performance, none of the considered regression models (of linear or quadratic form) emerges as the Boptimal^model. Although STEs prove useful for relating SD records of individual sensors on daily/monthly time scales, this does not ensure that STE (or joint) records can be used for trend analysis.

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On the variations of sunshine duration in Austria

Cited by 17 publications

References 6 publications

Sunshine duration and its variability in the main ridge of the Karkonosze Mountains in relation to with atmospheric circulation

Sunshine duration and its variability in the main ridge of the Karkonosze Mountains in relation to with atmospheric circulation

The Spatial and Temporal Variability of Sunshine Hours in Nigeria (1961 - 2012)

A comparison of long-term parallel measurements of sunshine duration obtained with a Campbell-Stokes sunshine recorder and two automated sunshine sensors

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