104 research outputs found

    Substantial large-scale feedbacks between natural aerosols and climate

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    The terrestrial biosphere is an important source of natural aerosol. Natural aerosol sources alter climate, but are also strongly controlled by climate, leading to the potential for natural aerosol-climate feedbacks. Here we use a global aerosol model to make an assessment of terrestrial natural aerosol-climate feedbacks, constrained by observations of aerosol number. We find that warmer-than-average temperatures are associated with higher-than-average number concentrations of large (>100 nm diameter) particles, particularly during the summer. This relationship is well reproduced by the model and is driven by both meteorological variability and variability in natural aerosol from biogenic and landscape fire sources. We find that the calculated extratropical annual mean aerosol radiative effect (both direct and indirect) is negatively related to the observed global temperature anomaly, and is driven by a positive relationship between temperature and the emission of natural aerosol. The extratropical aerosol-climate feedback is estimated to be -0.14 W m(-2) K-1 for landscape fire aerosol, greater than the -0.03 W m(-2) K-1 estimated for biogenic secondary organic aerosol. These feedbacks are comparable in magnitude to other biogeochemical feedbacks, highlighting the need for natural aerosol feedbacks to be included in climate simulations.Peer reviewe

    A phenomenological investigation of experiences of people who use YouTube to access support for Borderline Personality Disorder

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    Background: Research suggests that individuals with a mental health diagnosis often engage in social media to access support for their diagnosis. However, there is a lack of information on online usage in those diagnosed with borderline personality disorder (BPD). Furthermore, there is little research using qualitative interviews to examine the use of social media, such as YouTube, for psychological support. Purpose: The aim of the present study was to explore experiences of YouTube in individuals diagnosed with borderline personality disorder, including its impact on their offline lives. Methods: Six participants were recruited on social media; all those who contacted the researcher and met inclusion criteria were interviewed. Semi-structured interviews were used, lasting between 40 and 60 min. Data were transcribed verbatim and analysed using interpretive phenomenological analysis. Findings: The analysis produced two global themes: ‘YouTube as a form of self-help’ and ‘YouTube transforming the self’. Limitations: All the participants were female, limiting transferability of the findings. Originality: This paper is the first to show that YouTube could be used in addition to regular support to initiate recovery for those with BPD. It could provide them with a way to reduce self-stigma, enhance self-awareness and learn coping techniques

    Cool and hot executive functions at 5-years-old as predictors of physical and relational aggression between 5- and 6-years-old

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    To study the role of executive function (EF) in the early development of aggression, the role of cool and hot EF skills at 5 years-old in the development of physical and relational aggression between 5 and 6 years-old was explored. Typically-developing children (N = 80) completed tasks assessing their cool (inhibition, working memory, planning) and hot EF (affective decision making, delay of gratification) skills at 5-years-old. Longitudinal data were collected from teachers that rated children’s aggression when they were 5-, 5.5- and 6-years-old. Inhibitory control at 5-years-old predicted changes in physical and relational aggression between 5- and 6-years old. Early cool EF, but not hot EF, may therefore be associated with aggression and inhibitory control specifically with changes in aggression during early childhood

    Who escapes or remains a victim of bullying in primary school?

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    The stability of both direct and relational victimisation and factors that contribute to remaining, escaping or becoming a victim of bullying were investigated. 663 children at baseline aged 6-9 (years 2-4) were interviewed about their bullying experiences and parents completed a behaviour and health measure. Children’s perception of the degree of social hierarchical structuring and social prominence in their class was determined by peer nominations. 432 children participated in the follow-up either 2 or 4 years after baseline aged 10-11 (year 6) and completed a bullying questionnaire. Relational victims and children from classes with a high hierarchical structure were more likely to have dropped out of the study compared to neutral children, and children from classes with a low hierarchical structure. Relative risk analyses indicated a two-fold increased risk of remaining a direct victim at follow-up, compared to a child not involved at baseline becoming a victim over the follow-up period. In contrast, relational victimisation increased but was not found to be stable. Logistic regression analyses revealed that being a girl, and receiving few positive peer nominations predicted remaining a direct victim. Becoming a relational victim at follow-up was predicted by a strong class hierarchy. The implications for future study of early recognition of likely long term victims and early preventative bullying initiatives are discussed
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