Recent Severe Events Research Articles

Dust events characterization from visibility, trends and Dust Adversity Index in the Canary Islands for the period 1980–2022

Dust events in the Canary Islands have been documented since the late 19th century. However, during the past few years, several severe dust episodes have occurred in the Canary Islands, resulting in significant impacts on various sectors, such as aviation, air quality, and health, among others. These recent severe events have drawn the attention of both scientists and the general population, raising questions about whether these episodes are now more frequent and more severe. This study analyzes 483 dust events recorded in the Canary Islands over the last 40 years.Data analysis reveals that the average number of dust event days per year is approximately 24 days, and these events have an average duration of 1.8 days, both of which show a statistically significant decreasing trend over the series. Seasonal examination indicates that events occurring in the first and fourth quarters of the year have twice the duration of those in the other quarters. Furthermore, on an annual basis, events in the first quarter exhibit negative trends in both average and minimum visibilities. This suggests that dust events in the Canary Islands are becoming shorter in duration but more intense in terms of visibility.In this article, the Dust Adversity Index (DAI) is introduced to objectively compare the severity of events. Finally, anomalies in geopotential have been utilized to determine the prevailing synoptic patterns during dust events. It is evident that the dominant synoptic pattern during the first and fourth quarters of the year consists of a low cut-off system located to the west of the Canary Islands and a high-pressure system to the north of the Iberian Peninsula.

Highwater Mark Collection after Post Tropical Storm Dorian and Implications for Prince Edward Island, Canada

Prince Edward Island (PEI), Canada has been experiencing the consequences of a rising sea level and intense storms on its coasts in recent years. The most recent severe event, Post Tropical Storm Dorian (Dorian), began impacting Prince Edward Island on 7 September 2019 and lasted for over 20 h until the morning of 8 September 2019. The measurement of highwater marks (HWM) from the storm was conducted between 25 September and 25 October 2019 using a high precision, survey grade methodology. The HWM measured included vegetation lines, wrack lines, beach, cliff, and dune morphological features, and tide gauge data at 53 locations in the Province along coastal areas that are exposed to high tides, storm surge, high winds, and wave runup. Photos were taken to provide evidence on the nature of the HWM data locations. The data reveal that Dorian caused extensive coastal floods in many areas along the North and South Coast of Prince, Queens and Western Kings Counties of Prince Edward Island. The floods reached elevations in excess of 3.4 m at some locations, posing threats to local infrastructure and causing damage to natural features such as sand dunes in these areas. The HWM data can provide useful information for community and emergency response organizations as plans are developed to cope with the rising sea level and increased frequency of highwater events as predicted by researchers. As Dorian has caused significant damage in several coastal areas in PEI, better planning using an enhanced storm forecasting and coastal flood warning system, in conjunction with flood stage values, could possibly have reduced the impacts of the storm in the impacted areas. This could help enhance public understanding of the potential impacts in local areas and how they can prepare and adapt for these events in the future.

When the Bough Breaks: Managing Extreme Weather Events Affecting Electrical Power Grids

Preparing for, responding to, coping with, and managing the aftermath of severe impacts on electrical power system grids due to extreme weather events resulting from climate change are all receiving growing attention. Recent severe events in North America and across the globe have stressed the ability of electrical utilities to maintain the continuity and reliability of supply, with many customers experiencing extended power outages. Hurricane Sandy, recent severe winter snow and ice storms in the northeastern United States and eastern Canada, Supercyclone Phailin in India, and Typhoon Haiyan in the Philippines are prime examples. This article is sponsored by members of the Climate Change Technology Subcommittee of the IEEE Power & Energy Society Energy Development and Power Generation Committee, whose chair is Tom Baumann.

The UK response to the challenge of climate change

The paper provides a background for the need to address climate change globally. In particular, it shows how the UK has addressed and is approaching the implications of climate change especially for its deemed critical infrastructure and the civil engineering profession. In addition, it sets out UK government responses, legislation background and policy decisions with regard to risk and infrastructure adaptation. It highlights some worldwide examples of climate change issues and recent severe events in the UK, such as storms, high winds, flooding, high and low temperatures and their costly consequences. Reference is made to historical and recent severe weather events and consequences leading to proposed actions for the adaptation of critical infrastructure in the transport, utilities and energy sectors. A description of current UK research programmes addressing climate change issues is included. An outline of how the UK insurance and financial sectors have built climate change into their business operations is also given.

Suicide, Schizophrenia, and Schizoid‐Type Psychosis: Role of Life Events and Childhood Factors

The first objective was to identify the provoking events of suicide in patients with schizophrenia or schizoid-type disorder, and to assess the humiliation component of these events. The second objective was to verify if quality of care during childhood is a vulnerability factor for suicide in patients with schizophrenia or schizoid-type psychosis. Thirty-three cases of suicide with a diagnosis of schizophrenia or schizoid-type psychosis were compared with 34 living patients with a similar diagnosis. The psychological autopsy method was used. The assessments were made with the Structured Clinical Interview for the Diagnostic and Statistical Manual for Axis I mental disorders, the Life Events and Difficulties Schedule, and the Child Experiences and Child Abuse Interview. The suicide group (SG) experienced more often a recent severe event, usually of a humiliation nature, than the control group (CG). It also experienced more severe events associated with aggressive behavior or with psychiatric impairment. Contrary to expectations, the CG had worse scores than the SG for quality of care during childhood. In conclusion, suicide in schizophrenia is related both to environmental stress and to psychiatric impairment.

The role of life events in depression in primary medical care versus psychiatric settings

Background The relationship between negative life events and depression is inconsistent. The purpose of the current study is to investigate the hypothesis that depression in the community may be related more to major life events than is depression in psychiatric settings. Methods This hypothesis was tested using depressed primary medical care (PC; n=70) and psychiatric patients ( n=62). Nondistressed ( n=109) and distressed/nondepressed PC patients ( n=43) served as comparison-control groups. Life events were rated using the contextual method of Brown and Harris (Brown, G.W., Harris, T.O., 1978. Social origins of depression. Tavistock, London). Results Depressed PC patients, but not depressed psychiatric patients, were significantly more likely to have recent severe events than the comparison-control groups. Self-reported distress in the absence of depression was not associated with severe life events. Limitations History of depression was assessed using a simple count of number of previous episodes, and the assessment of depression history may require more sophisticated assessment. The measure of endogenous depression used in this study was created post-hoc and needs replication. Conclusions Diathesis-stress models need to accommodate a lack of universality for severe stress prior to the onset of depression. Clinical strategies may need to reflect patient treatment preferences associated with differences across settings with respect to the perceived role of stress in their depression.