The influence of latitude and cloud cover on the seasonality of human births.

Social biology Pub Date : 2003-02-01 DOI:10.1080/19485565.2003.9989063

David R Cummings

{"title":"The influence of latitude and cloud cover on the seasonality of human births.","authors":"David R Cummings","doi":"10.1080/19485565.2003.9989063","DOIUrl":null,"url":null,"abstract":"Background: A previous study (Cummings, 2002), hypothesized that human birth seasonality was primarily related to environmental light intensity/photoperiod.Purpose: There are two primary goals: to explain seasonality differences between U.S., Canada, and Europe and to test the influence of environmental light intensity/photoperiod at divergent latitudes.Methodology: Existing seasonality data were extracted from previous studies at various locations throughout the world. Daily cloud cover amounts (clearness) were utilized as indices for environmental light intensity.Discussion: Results were evaluated and discussed for each sub-study.Conclusion: Sub-study results support the hypothesis that human birth seasonality may be influenced by environmental light intensity and photoperiod. This conclusion is supported by logical links between increased light intensity/photoperiod and conceptions at different latitudes. Irrefutable proof may involve correlating long term changes in cloud cover with long term changes in human birth seasonality.","PeriodicalId":76544,"journal":{"name":"Social biology","volume":"50 1-2","pages":"23-41"},"PeriodicalIF":0.0000,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/19485565.2003.9989063","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Social biology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/19485565.2003.9989063","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 10

Abstract

Background: A previous study (Cummings, 2002), hypothesized that human birth seasonality was primarily related to environmental light intensity/photoperiod.

Purpose: There are two primary goals: to explain seasonality differences between U.S., Canada, and Europe and to test the influence of environmental light intensity/photoperiod at divergent latitudes.

Methodology: Existing seasonality data were extracted from previous studies at various locations throughout the world. Daily cloud cover amounts (clearness) were utilized as indices for environmental light intensity.

Discussion: Results were evaluated and discussed for each sub-study.

Conclusion: Sub-study results support the hypothesis that human birth seasonality may be influenced by environmental light intensity and photoperiod. This conclusion is supported by logical links between increased light intensity/photoperiod and conceptions at different latitudes. Irrefutable proof may involve correlating long term changes in cloud cover with long term changes in human birth seasonality.

查看原文本刊更多论文

纬度和云量对人类出生季节性的影响。

背景:之前的一项研究(Cummings, 2002)假设人类的出生季节性主要与环境光强度/光周期有关。目的:有两个主要目标:解释美国、加拿大和欧洲之间的季节性差异，并测试不同纬度环境光强度/光周期的影响。方法:现有的季节性数据是从以前在世界各地进行的研究中提取的。利用日云量(净度)作为环境光强的指标。讨论:对每个子研究的结果进行评估和讨论。结论:子研究结果支持人类出生季节性可能受环境光强和光周期影响的假设。这一结论得到了光强/光周期增加与不同纬度观念之间的逻辑联系的支持。无可辩驳的证据可能涉及将云量的长期变化与人类出生季节性的长期变化联系起来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Social biology

自引率

0.00%

发文量