Local daily temperatures, thermal seasons, and suicide rates in Finland from 1974 to 2010

Hiltunen, Laura; Haukka, Jari; Ruuhela, Reija; Suominen, Kirsi; Partonen, Timo

doi:10.1007/s12199-014-0391-9

Cited by 33 publications

(14 citation statements)

References 46 publications

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“…Antidepressant consumption was not associated with increased suicide attempts in a large Finish 1966 birth cohort 81 . Some seasonal/weather parameters were also suggested to impact suicide death rates in Finland 82 83 84 and East European countries 85 .…”

Section: Discussionmentioning

confidence: 99%

Disparities in suicide mortality trends between United States of America and 25 European countries: retrospective analysis of WHO mortality database

Fond

Llorca

Zendjidjian

et al. 2016

Sci Rep

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The objective was to examine changes in temporal trends in suicide mortality in 26 Western countries by retrospective trend analysis of the WHO mortality database on causes of deaths. From 1990 to 2010, there was a median reduction in suicide mortality of 22.7%, ranging from a 46% reduction in Estonia to a 26.2% increase in Romania. Suicide mortality decreased by ≥20% in 15 countries, and the reduction tended to be greater in countries with higher mortality in 1990. In most of the central European countries mortality strongly declined. The median changes in the age groups were −25.3% (range −62.9% to 72.6%) in people aged 15–24 years, −36.9% (−60.5% to 32.4%) in 25–34 years, −3.6% (−57.1% to 92%) in 35–54 years, −12.2% (−37% to 65,7%) in 55–74 years and −16.1% (−54.5% to 166.7%) in ≥75 years. Suicide prevention programs in youths and in the elderly seem to be effective (at least in females for the elderly) and efforts should be pursued in this way. However, suicide mortality of the people aged 35–54 years has increased in half of the studied countries between 1990 and 2010. Public policies should further orientate their efforts toward this population.

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Section: Discussionmentioning

confidence: 99%

Disparities in suicide mortality trends between United States of America and 25 European countries: retrospective analysis of WHO mortality database

Fond

Llorca

Zendjidjian

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…They argue that the 15 °C temperature threshold is not a suitable criterion for the summer season in Estonia, as during extremely cold summers, the daily mean air temperature does not exceed this limit for longer period of time. Hiltunen et al (2014) hypothesized that the ambient temperature and the timing of thermal seasons onset might associate with the suicide rate in Finland. As climatological data, they used daily mean, minimum, and maximum temperatures from the local weather stations at the Helsinki-Vantaa, Jyväskylä, and Oulu airports, the dates for the thermal seasons for each study area for each year, and the dates for the astronomical seasons.…”

Section: Introductionmentioning

confidence: 99%

Thermal seasons onset and length in Poland – a multiannual perspective on 1971-2010

Kitowski¹,

Marosz²,

Miętus³

2019

Időjárás

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⎯ The major aim of the research is to analyze the variability of thermal seasons characteristics (onset and length), at 7 stations in Poland during the 40-year-long period of 1971-2010. The analysis comprised the selection of the optimal method for season onset identification and the statistical analysis of the season onset and length characteristics, which was augmented with the interdecadal comparison of statistics using one-way analysis of variance (ANOVA). Also, it was investigated if the season onset type (late/normal/early) induces the season length distribution characteristics. The results show that the variability of the onset of thermal seasons is most pronounced in the case of summer and early spring. Summer also shows the tendency to occur faster, whereas autumn tends to start later. The interdecadal change of the thermal seasons length is clearly visible in the case of summer which length systematically increases and winter where the trend is reversed at most of the stations. The research also confirmed that for winter, early spring, and summer, the onset type clearly determines the distribution of the season length. Other seasons either show little variability or the differences appear only at some stations.

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“…This lack of consensus is unusual. For most parts of the northern hemisphere 8,9 -including Italy 10 , USA 11 , China 12 , Poland 13 and Finland 14 -seasonal boundaries are well established and clearly communicated.…”

Section: Introductionmentioning

confidence: 99%

Statistical classification of South African seasonal divisions on the basis of daily temperature data

Walt¹,

Fitchett²

2020

S. Afr. J. Sci.

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Across South Africa, a wide range of activities is influenced by differences in seasonality. In a South African context, there is little consensus on the timing of seasonal boundaries. Inconsistency exists through the use of ad-hoc approaches to define seasonal boundaries across South Africa. In this paper, we present one of the very first uniform statistical classifications of South African seasonal divisions on the basis of daily temperature data. Daily maximum and minimum temperature data were obtained from 35 selected South African Weather Service meteorological stations that had sufficiently complete data sets and homogeneous time series, spanning the period 1980–2015. An Euclidean cluster analysis was performed using Ward’s D method. We found that the majority of the stations can be classified into four distinct seasons, with the remaining 12 stations’ data best classified into three seasons, using Tavg as the classifier. The statistically classified seasonal brackets include summer (October/November/December/ January/February/March), early autumn (April) and late autumn (May), winter (June/July/August), and spring (September). Exploring the boundaries of seasons, the start of summer and end of winter months follow a southwest to northeastwards spatial pattern across the country. Summers start later and winters end later in the southwestern parts of the country, whereas in the northeast, summers start earlier and winters end earlier.

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Local daily temperatures, thermal seasons, and suicide rates in Finland from 1974 to 2010

Abstract: Our study is in line with some earlier studies which imply that impairment of thermoregulation might exist among suicide victims.

Cited by 33 publications

References 46 publications

Disparities in suicide mortality trends between United States of America and 25 European countries: retrospective analysis of WHO mortality database

Disparities in suicide mortality trends between United States of America and 25 European countries: retrospective analysis of WHO mortality database

Thermal seasons onset and length in Poland – a multiannual perspective on 1971-2010

Statistical classification of South African seasonal divisions on the basis of daily temperature data

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