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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

The future of flooding insurances : A qualitative review of how insurances regarding flood damage might change in the future of the insurance industry in Sweden

Nyström, David January 2023 (has links)
Insurance companies are grappling with the rising frequency and severity of extreme weather-related flooding events, which currently pose the highest financial burden both in total and per individual case. The existing insurance model isn't economically sustainable if such events continue to increase. To assess future needs and challenges in flooding insurances, research on changing weather patterns and interviews with employees at major firms were conducted. The research indicates that climate change has and will further worsen extreme rain events in Sweden, leading to more frequent and intense flooding events. Interviews revealed that firms are aware of impending changes in the insurance industry due to climate change but lack proactive measures to address them. Responsibility is fragmented, and communication between stakeholders is suboptimal. To address these challenges, I look at recent research regarding flood risk assessment and if these are applicable for the insurance industry in Sweden to ensure future profitability.
22

Investigating Carbon Dynamics of a Young Temperate Coniferous Forest Using Long-Term Eddy Covariance Flux Observations

Tabaei, Farbod January 2023 (has links)
Plantation and managed forests are major sink of atmospheric CO2 in North America and across the world. If properly managed, these forests may help to offset anthropogenic greenhouse gas emissions to mitigate climate change. This study investigated the impacts of climate variability, extreme weather events, and disturbance (thinning) on the growth and carbon (C) exchanges of a young temperate coniferous plantation forest (48-year-old white pine (Pinus strobus)) in the Great Lakes region in Canada using long-term eddy covariance flux observations. CO2 fluxes, as well as meteorological and soil variables were continuously measured from 2008 to 2021 (14 years) to estimate net ecosystem productivity (NEP), ecosystem respiration (RE), and gross ecosystem productivity (GEP). Soil respiration (Rs) was also measured using automatic soil chambers from 2017 to 2019. Selective thinning was conducted first time in this stand in January 2021 to remove approximately 1/3 of the basal area. Study results showed that climate conditions in the early growing season, from late May to mid-July, determined the overall strength of C uptake in any given year. However, above-average temperature and precipitation in the late growing season significantly reduced NEP and even in some cases, transformed the forest into a net C source for short periods due to large pulses of RE. Mean annual GEP, RE and NEP values were 1660 ±199, 1087 ±96 and 592 ±169 g C m-2 yr-1, respectively, from 2008 to 2021. Thinning did not significantly impact the C uptake of the forest as the stand remained a net C sink with an annual NEP of 648 g C m-2 yr-1 in 2021. Changes in annual GEP, RE and NEP in 2021 remained within the range of interannual variability over the study period. Overall, Rs accounted for roughly 89% of the annual RE in this stand. A complete understanding of the response of forest C dynamics to climate variability and thinning in young plantation forests is critical to guiding future forest management efforts for enhancing the growth and C uptake of these forest plantations to maximize their potential in support of providing nature-based climate solutions. / Thesis / Master of Science (MSc)
23

Effects of climate change and other anthropogenic impacts on plant phenology and wildlife health in North America

Miller, Tara King 19 September 2023 (has links)
Plants and wildlife are being affected by climate change and human activities. We need to understand the patterns in these impacts to develop management strategies and policy solutions that will help us conserve ecosystems. Climate change is shifting the timing of key life stages in plants, but we do not fully understand the extent and implications of phenological shifts – or changes in the timing of seasonal events – for understudied stages like fruiting or for potential mismatches between plants in different canopy levels. Human activities and climate change impact and harm wildlife in many ways, from wildlife-vehicle collisions and lead poisoning to hurricanes and infectious diseases, but it has been difficult to form a comprehensive picture of these threats across many species and regions, and to discern which factors pose the greatest threat to at-risk species. Here, I collected and curated data from herbarium specimens and wildlife rehabilitation records to advance our understanding of the effects of climate change and human activities on plants and wildlife in North America. First, I found that metrics of first, peak, and last fruiting dates were strongly correlated between two historical datasets, suggesting that field observations and herbarium collections capture similar orders of fruiting times among plant species in New England. However, I found differences in the exact timing of first and last fruiting dates, indicating that researchers should match methodology when selecting historical records of phenology for present-day comparisons, especially when the exact timing is important. Next, I found that native trees, native shrubs, and non-native shrubs advanced their leaf-out or flowering times faster than native wildflowers advanced their flowering times with warming temperatures. As climate warming progresses, some native wildflower species, especially in warmer regions, are likely to be affected by phenological mismatch and lose access to early-season sunlight. Last, I found that human disturbances accounted for the largest proportion of wildlife injury and sickness in animals admitted to wildlife rehabilitation centers, and I identified the predominant reason for admittance for many species; these reasons included vehicle collisions, fishing incidents, and window or building collisions. I recommended possible interventions to help conserve wildlife, including using or changing wildlife road crossings, fishing and hunting regulations, lead and pesticide regulations, and disaster management plans. In this research, I compiled and analyzed innovative, newly-digitized data sources to provide new insights into the effects of climate change and human activities on plants and wildlife in North America. / 2024-09-18T00:00:00Z
24

Adaptation of buildings for climate change : A literature review

Cheng, Cheng January 2021 (has links)
In September 2020, Northeast China suffered three unprecedented typhoons in half a month, and there was freezing rain in early November, all of which led to the large-scale urban power failure. The occurrence of these phenomena makes people directly see climate change and its impact on the living environment of human beings. Many studies have shown that the cause of climate change is the increase of artificial greenhouse gas emissions since industrialization. In addition to the increase of extreme weather disasters, the most direct manifestations of climate change are the rising temperature, droughts, and rising sea levels. The building sector accounts for 39% of global greenhouse gas emissions and 36% of energy consumption. To ensure the long-term integrity and normal operation of buildings, we need to understand the impact of climate on buildings, and how to deal with it. This paper reviews the literature on climate change and building energy by searching search engines and literature databases. For extreme weather, most literature talks about the impact of power failure, the main strategy is to improve reliability, resilience, sustainability, and robustness, it can help reduce losses and recover as soon as possible. On the other hand, the methods of adaptation to and mitigation of non-disaster weather are reviewed from the perspective of sustainability. This paper mainly reviews the methods of passive technology and strategy for exemplary buildings, building envelope, passive ventilation, lighting/shading, solar energy, bioenergy, dehumidification, passive cooling, and design strategy. According to the local climate, the geographical characteristics of the building, to develop comprehensive passive technology and strategy, can meet or close to meet their energy saving, emission reduction, comfort needs. This paper can provide a technical and strategic reference for the building sector to deal with climate change. / <p></p><p>Via online ZOOM meeting Presentation</p><p></p><p></p><p></p><p></p><p></p><p></p>
25

Artificial intelligence and cloud-based collaborative platforms for managing disaster, extreme weather and emergency operations

Gupta, S., Modgil, S., Kumar, A., Sivarajah, Uthayasankar, Irani, Zahir 27 September 2022 (has links)
Yes / Natural disasters are often unpredictable and therefore there is a need for quick and effective response to save lives and infrastructure. Hence, this study is aimed at achieving timely, anticipated and effective response throughout the cycle of a disaster, extreme weather and emergency operations management with the help of advanced technologies. This study proposes a novel, evidence-based framework (4-AIDE) that highlights the role of artificial intelligence (AI) and cloud-based collaborative platforms in disaster, extreme weather and emergency situations. A qualitative approach underpinned by organizational information processing theory (OIPT) is employed to design, develop and conduct semi-structured interviews with 33 respondents having experience in AI and cloud computing industries during emergency and extreme weather situations. For analysing the collected data, axial, open and selective coding is used that further develop themes, propositions and an evidence-based framework. The study findings indicate that AI and cloud-based collaborative platforms offer a structured and logical approach to enable two-way, algorithm-based communication to collect, analyse and design effective management strategies for disaster and extreme weather situations. Managers of public systems or businesses can collect and analyse data to predict possible outcomes and take necessary actions in an extreme weather situation. Communities and societies can be more resilient by transmitting and receiving data to AI and cloud-based collaborative platforms. These actions can also help policymakers identify critical pockets and guide administration for their necessary preparation for unexpected, extreme weather, and emergency events. / This study has been supported by the Area of Excellence AI, Data Science & Business at NEOMA Business School, France under the fund number 416005.
26

Climate Adaptation on Swedish farms : Farm level crop diversity decisions in a variable climate

Eskilson, Evan January 2024 (has links)
In this thesis I aim to determine the importance of extreme weather experience in Swedish farmers crop mix decisions. In this way, I add to the evolving field of climate change impacts on farmer livelihoods with a specific focus on perception of risk and locational vulnerabilities. I develop a simplified measure for locationally specific vulnerabilities and position these against the actual crop mixes that Swedish farmers have chosen, to test the influence of extreme rainfall exposure on decision making. My data builds off the Land Parcel Identification System (LPIS) Database of farm and crop extents for 99% of Swedish agricultural land between 2015 and 2023, and climate data from a large-scale meteorological assessment across Europe. I also account for environmental characteristics that may affect vulnerability and the perception of risk via soil characteristics. I use these data to map functional diversity changes at the farm level over the period, and also for estimating mixed models with two way interaction terms. Based on an adapted Protection Motivation Theory (Rogers, 1975), I expect that farms that are more exposed to an increased frequency of extreme weather events (rainfall over the 95th and 99th percentile) year on year, would diversify their crop mix as a risk mitigation practice. However, I find that on average, previous exposure to extreme weather has essentially no effect on the level of diversity a farmer chooses to pursue. When decomposing these findings into different farmer types and environmental conditions there is a moderate level of heterogeneity such that farmers that are more able to take adaptive measures, do. Also, farmers that have planted more diverse farms in the past tend to continue doing so. While those that trend toward less diverse crop mixes tend to respond to exposure by further specializing their crop mixes. These findings suggest that there is a weak underlying preference for higher levels of diversity among Swedish farmers, however the non-climatic factors beyond extreme weather dominate diversity and adaptation decision making. This may be understood as farmers aiming to make rational decisions, but finding their options significantly constrained by the larger political economy in which they find themselves.
27

Projecting Planning-Related Climate Impact Drivers for Appalachian Public Health Support

Larsson, Natalie Anne 10 July 2024 (has links)
Climate change is impacting the intensity, duration, and frequency of climatic events. With climate change comes a multitude of adverse conditions, including extreme heat events, changes in disease patterns, and increased likelihood and frequency of natural disasters, including in places previously not exposed to such conditions. Human health has foundations in the environment; therefore, these adverse climatic conditions are directly linked to human health. Rural communities in Appalachia are likely to experience negative consequences of climate change more severely due to unique geomorphology and sociopolitical realities of the region. Non-governmental organizations (NGOs) throughout the Appalachian region are currently working to build resilience and prepare for potential adverse effects from climate change. To aid in this process, projections of future climate scenarios are needed to understand possible situations and adequately prepare. In partnership with Ohio University and West Virginia University, this study aims to characterize potential future climatic scenarios from publicly-available global climate models (GCMs) and prepare information to share with Appalachian communities. Climate model information for this analysis was obtained from NASA's Coupled Model Intercomparison Project (CMIP6). All code for data processing and analysis was prepared using the open-source R programming language to support reproducibility. To confirm that models can accurately simulate Appalachian climatic conditions, CMIP6 hindcast simulations for precipitation and maximum temperature were compared to observed weather records from NOAA. Climate models over and underestimated average precipitation values depending on location, while models consistently underestimated extreme precipitation values, simulated by total five-day precipitation. For temperature, climate models consistently underestimated average and extreme high temperature indicators. For Appalachian region projections, three towns of interest (one for each state involved in the study: Virginia, West Virginia, and Ohio) were selected based on current community resilience efforts. In these locations, mid-century (2040 – 2064) and end-of-century (2075 – 2099) projections for precipitation and temperature were summarized under a low emissions scenario and a high emissions scenario. Increases in precipitation and temperature were observed under average and extreme scenarios; these increases were noticeably more extreme under higher emissions scenarios. These trends are consistent with other studies and climate science consensus. When compared to hindcast values, observed average precipitation values were overestimated and underestimated, while observed extreme precipitation indices, average temperatures, and heat wave indices were underestimated by GCMs. Context with observed data is important to understanding model accuracy for the Appalachian region. GCMs are a useful tool to project potential future climate scenarios at specific locations in the Appalachian region, though model data is best used to communicate general trends rather than as inputs for other physical models. / Master of Science / Climate change is driving previously unseen changes in many aspects of the environment. Among these aspects, and of particular concern, are increased precipitation and increased high temperatures, which have direct negative outcomes on human health. Climate change can impact human health in a variety of ways, such as increasing instances of heat-related illnesses like heatstroke, changing insect-carried diseases patterns (i.e. Lyme disease, malaria), worsening preexisting conditions like asthma, and increasing the likelihood of natural disasters like flooding. Climate change also impacts mental health, especially increasing instances of anxiety and post-traumatic stress disorder from disasters. Rural communities like Appalachia are more likely to experience severe negative outcomes due to lack of resources, remote location, and economies historically based on resource extraction. Appalachia specifically also faces unique challenges with flooding, as many towns are situated in valleys with streams or rivers running through the center of town. To address and prepare for possible climate change outcomes, community-based planning is required to build resiliency. Throughout many areas, but specifically in Appalachia, many community-based organizations are already working to strengthen their communities by providing stable housing, addressing flooding, and preparing emergency response teams. To aid in these efforts, information about potential future climate is beneficial to these organizations to understand and prepare for potential conditions. This study aims to use publicly-available climate models to generate information about possible future climate conditions to be shared with community organizations. Additionally, this project's datasets and procedures are publicly available, so this analysis can be performed by communities anywhere in the world given they have adequate computing power. To check that models are a good indicator of previous climate conditions, and therefore would be useful for future projections, historic projected climate model outputs were compared to observed weather data. After confirming that the models used were fairly consistent with observed data, projected values for midcentury (2040 – 2064) and end-of-century (2075 – 2099) were gathered for Appalachian towns with interested community organizations. Projected values show increases in high temperatures and precipitation throughout the Appalachian region, including in short-term event scenarios, which is consistent with other climate science. Higher emissions scenarios result in greater increases in average and extreme temperature and precipitation values. Climate models can be a useful tool in understanding potential general climatic trends for a specific location and can support climate science communication.
28

Climate-related Stresses on Human Health in a Remote and Rural Region of Ontario, Canada

Clarke, Kaila-Lea 20 September 2012 (has links)
This thesis examines the susceptibility of human health to climate-related stresses in the rural municipality of Addington Highlands, Ontario. Human health is sensitive to climatic variations and change, and public health systems play a role in managing climate-related risks. Canada is generally deemed to have considerable capacity to adapt to vulnerabilities associated with climate change, yet there is variability among communities in their exposure and ability to manage health risks. This thesis examines the health-related vulnerability of the community of Addington Highlands. Drawing upon data gained from key informant interviews and newspaper articles, as well as other secondary data sources, the thesis documents climate-related health risks, outlines the programs and services available to deal with those risks, and assesses the capacity of the community to adapt to future climate conditions and risks. Conditions such as storms, heat stress and forest fires currently present health risks in the area, and they are expected to become more prevalent with climate change. The health risks of Lyme disease, West Nile virus and algal blooms are likely to increase in the future as the climate continues to change. Adaptation to these risks is evident in several of Addington Highlands public health and emergency management programs. The community’s adaptive capacity is strengthened by its social networks and institutional flexibility, but it is constrained by its aging population, limits to the availability and access to health care services, and challenges relating to the retention of service providers. An important strategy to assist adaptation to climate change risks to health is the promotion of public awareness, a strategy to which this research contributes. This thesis research serves to identify and better understand vulnerabilities, and help stimulate actions toward preparing Addington Highlands for possible future climate-related risks.
29

Perspectives on the vulnerability of the Swedish electricity distribution system : Extreme weather conditions and climate change

Plejert, Tina January 2005 (has links)
<p>This study deals with the perspective of vulnerability of the Swedish electricity distribution system to climate and weather related risks. How and to what extent the electricity sector is adapting to the risk and what possibilities are formed in this respect are investigated. This is a quantitative and qualitative analysis where statistical data has been used to apprehend the extent of disturbances of the electricity distribution system and their causes. Interviews have been used in order to investigate different views among actors working within the electricity distribution system sector.</p><p>The result shows that the dominating cause of disturbances in the electrical network in Sweden is the weather, giving most hours of breaks. The countryside has more often disturbances than urban areas. It also emerges that it is the lines overhead that are most affected by disturbances. The system is flexible. If one line is disturbed the electricity can be distributed using another line (redundancy). It seems like there is a diversion between the respondents on how and if a future climate change really is a risk for the electricity distribution system. It is clear that the vulnerability has increased in the society during the past 10-20 years, and so has the societal costs of the disturbances because of the increasing dependence on electricity. Reducing the consequences of a weather related impact on the electrical system will make society more resilient and less vulnerable. The respondents in this study are somewhat adapting to the weather related risks that they have identified with technical solutions. It is important to learn more about how the electrical system properties influence the sensitivity in society. There is a need to investigate the dependency of electricity in society. It is also important that all the actors have the same interpretation of the difference between a recurrent event and a nature disaster. More work should be done to clarify where the responsibility for adapting the electrical sector to the possible climate change lies. This complex responsibility issue with all affected actors influences the sensitivity of society and the electrical system.</p>
30

Climate-related Stresses on Human Health in a Remote and Rural Region of Ontario, Canada

Clarke, Kaila-Lea 20 September 2012 (has links)
This thesis examines the susceptibility of human health to climate-related stresses in the rural municipality of Addington Highlands, Ontario. Human health is sensitive to climatic variations and change, and public health systems play a role in managing climate-related risks. Canada is generally deemed to have considerable capacity to adapt to vulnerabilities associated with climate change, yet there is variability among communities in their exposure and ability to manage health risks. This thesis examines the health-related vulnerability of the community of Addington Highlands. Drawing upon data gained from key informant interviews and newspaper articles, as well as other secondary data sources, the thesis documents climate-related health risks, outlines the programs and services available to deal with those risks, and assesses the capacity of the community to adapt to future climate conditions and risks. Conditions such as storms, heat stress and forest fires currently present health risks in the area, and they are expected to become more prevalent with climate change. The health risks of Lyme disease, West Nile virus and algal blooms are likely to increase in the future as the climate continues to change. Adaptation to these risks is evident in several of Addington Highlands public health and emergency management programs. The community’s adaptive capacity is strengthened by its social networks and institutional flexibility, but it is constrained by its aging population, limits to the availability and access to health care services, and challenges relating to the retention of service providers. An important strategy to assist adaptation to climate change risks to health is the promotion of public awareness, a strategy to which this research contributes. This thesis research serves to identify and better understand vulnerabilities, and help stimulate actions toward preparing Addington Highlands for possible future climate-related risks.

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