Physical and Environmental Geography Commons^™

Changes Of Winter Severity In Arkansas During 1901-2100, Christian Garcia

Graduate Theses and Dissertations

The objective of this study was to quantify the winter severity in a way that was reproduceable and easy to understand. The Accumulated Winter Severity Seasonal Index (AWSSI) was chosen for this reason and was used to quantify winter severity by season across the state of Arkansas. The variables that go into the AWSSI calculation are maximum daily temperature, minimum daily temperature, daily snowfall, and daily snow depth. When the snowfall and snow depth were missing, they can be estimated using daily temperature and precipitation. Then the estimated snowfall and snow depth can be subsequently used to quantify the winter …

El Niño And The Human-Environment Nexus: Drought And Vulnerability In Singapore 1877-1911, Fiona Williamson

Research Collection College of Integrative Studies

This chapter brings a climatic perspective to the study of Singaporean history by exploring the impacts of the strong El Niño inspired droughts of 1877, 1902 and 1911. The narrative focuses on unpacking the nexus of nature-inspired versus human-induced vulnerability to drought within the contexts of colonial urbanisation and looks at the short-to medium-term impacts of the events on society. It also explores how such events inspired new questions about the climate and regional teleconnections, as a wealth of evidence became available due to the increasingly connected nature of scientific institutions, scientific literature, and communications systems across the Indian Ocean …

Development Status And Prospect Of Marine Environmental Security Technology, Huabin Mao, Yuantao Wu, Jianping Yin, Shumin Lian

Bulletin of Chinese Academy of Sciences (Chinese Version)

With the continuous progress of ocean observation technology, more and more technical means have been provided for marine environmental safety technology. The marine environmental security technology plays an indispensable role in the national Belt and Road Initiatives. Meanwhile, it not only plays a crucial role in the achievement of building a maritime power and the maintenance of national maritime security, but also plays a positive role in promoting the construction of a "community with a shared future for the oceans" and implementing the goal of marine sustainable development. Based on the practical problems, this study introduces the system composition of …

Thoughts On Constructing Self-Reliance And Self-Strengthening Marine Scientific Observation And Detection Technology System, Yuantao Wu, Xiaobo Ren, Xiaonan Duan, Zhibin Wen, Danhong Dong, Jianping Yin, Zhongli Sha, Hongyu Zhao, Lei Jiang, Lixia Jiang, Gang Shen

Bulletin of Chinese Academy of Sciences (Chinese Version)

The marine area is a strategic area of China. To build China into a strong maritime country, we should enhance the capacity for exploiting marine resources, develop the maritime economy, protect the marine ecological environment, and resolutely safeguard national maritime rights and interests. Promoting marine science and technology to achieve high-level scientific and technological self-reliance is an inevitable requirement for accelerating the construction of maritime country. The marine scientific observation and exploration is the basic means of understanding the ocean, and is also an important basis for the marine resources development, environmental protection and rights and interests protection. This paper …

Perspective On Key Materials For Marine Observation And Exploration Platform, Rui Yang, Yingjie Ma, Shijing Cheng

Bulletin of Chinese Academy of Sciences (Chinese Version)

An overview is presented of the status of pressure-resistant structural materials and structural functional materials for application in marine observation and exploration platform. The key roles of new materials in facilitating high performance marine equipment are highlighted. The most in-demand observation tasks concern the upper ocean and low cost materials must be developed to manufacture affordable equipment. For deep ocean observations, future challenges are identified for developing next-generation high strength titanium alloys, buoyancy materials, lighting materials, and lubricating and sealing materials. Recommendations are proposed regarding project organization and research paradigm update, and emphasis is placed upon identifying and solving scientific …

Thinking On Nuclear Energy Supply Scheme For Underwater Observation And Exploration Equipment, Zilong Peng, Shuxue Yan, Jianping Yin, Lei Yang, Xiangzhou Cai, Jie Yu

Bulletin of Chinese Academy of Sciences (Chinese Version)

The ocean is essential to country's strategic interests and common destiny of mankind, and therefore equipment of various kinds is urgently needed for all-around and multi-dimensional ocean observation and exploration. This article brief introduced the two technological approaches of nuclear energy supply for underwater observation and exploration equipment and relevant exchange technologies of nuclear heat to electric power, quantitatively summarized the applicability of nuclear energy supply on all kinds of equipment, discussed the nuclear safety issues thereon, and then recommended that the technology research of radioisotope fabrication and separation and the construction of relevant facility, the development of individual reactor …

Status And Trends Of Energy Power Supply Technologies For Underwater Equipment, Tianyuan Wu, Lixia Jiang, Guanglei Cui

Bulletin of Chinese Academy of Sciences (Chinese Version)

In the process of cognition and exploration of the ocean, underwater observation and detection equipment is the necessary facility to enter and detect the ocean. These types of equipment provide technical support for the development and utilization of marine resources and is an important grip for the implementation of China's marine strategy and the construction of a strong marine country. However, limited by the current level of energy supply, the underwater equipment has problems such as single operation capacity and short single endurance time, which cannot meet the needs of long-term operation under complex working conditions. As the development of …

Application And Prospect Of Unmanned Underwater Vehicle, Shuo Li, Yuantao Wu, Chen Li, Hongyu Zhao, Yiping Li

Bulletin of Chinese Academy of Sciences (Chinese Version)

Unmanned underwater vehicle (UUV) is one of the advanced technologies for human to explore and understand the ocean. It is an important equipment for China's construction of a marine power. This study introduces the current development status of UUV, with special focus on the latest application achievements of China's pedigree UUV developed by Shenyang Institute of Automation, Chinese Academy of Sciences, in deep-sea mineral resource exploration, deep-sea scientific research, abyss research and North-South polar expedition. Combined with the current research basis of UUV, the development and application of underwater vehicle in the future are prospected. Through the research and development …

Critical Technologies For Detection Of Polar Environment, Xiao Cheng, Shuangshuang Fan, Lei Zheng, Juanling Zhou

Bulletin of Chinese Academy of Sciences (Chinese Version)

The South and North poles are cold sources of the Earth system. The local climate and environment in polar regions have experienced rapid change under global warming. The development of technologies for the detection of the polar environment can provide critical support for the understanding of mechanisms of rapid climate change and the participation in international polar governance. Technologies for the detection of the polar environment have been seen considerable development in the past four decades since China engaged in polar expeditions. This study introduces the domestic and international development process and the current status of the related technologies. The …

In Situ Detection Technology For Deep Sea Extreme Environment: Research Status And Strategies, Xin Zhang, Chaolun Li, Lianfu Li

Bulletin of Chinese Academy of Sciences (Chinese Version)

The extreme environment of the deep sea has shaped special life processes with great resource potential, and its detection and research are the frontier of international earth science. While the harsh high-pressure environment of the deep sea greatly limits the application of deep-sea sampling and detection technology, the deep-sea in situ detection technology can obtain the component and content information of deep-sea samples without changing the location and state of the measured object, hence it is more and more widely used in the research of deep-sea extreme environment. The deep-sea extreme environment in situ detection technology has a broad prospect. …

Review And Prospect On International Ocean Circulation And Climate Observation Projects In Indo-Pacific Convergence Region, Fan Wang, Hui Zhou, Jianing Wang, Lin Wang, Yixin Ma

Bulletin of Chinese Academy of Sciences (Chinese Version)

Today, human society faces global warming and its subsequent challenges. The ocean, as one important supporting component of the earth's life system, plays a vital role in realizing the goal of sustainable development of human society. As the birthplace of the heat engine of the earth's climate system, the Indo-Pacific convergence region plays a decisive role in modulating the distribution of earth heat and climate change and has been the focus of international ocean and climate observation projects. This study aims to summarize the achievements and challenges in the international observation projects in the Indo-Pacific convergence region since the last …

Nashville-Basin Tornadoes: Using Storm Types To Elucidate The Local Climatology And Forecasting Challenges, Morgan Steckler, Kelsey Ellis

Pursuit - The Journal of Undergraduate Research at The University of Tennessee

Early 3 March 2020 was a devastating night for many middle Tennessee residents. A strong EF-3 tornado tore through Nashville at 65 mph, and another EF-4 killed 18 in Baxter and Cookeville alone. Residents of the Southeastern United States are particularly vulnerable to tornadoes. This study aims to better understand local forecasting challenges by looking at the types of storms that produce tornadoes. Storm types, also known as convective modes, divide tornado-producing storms into categories by length, shape, multiplicity, and intensity. Distinguishing storms by these modes allows for a broader understanding of their occurrences and impacts. This study specifically evaluates …

Inland Tropical Cyclone Intensity Decay In The Continental United States, Yijie Zhu

USF Tampa Graduate Theses and Dissertations

Tropical cyclone (TC) hazard preparation is mostly focused on coastal cities with less attention typically paid to inland regions. The impact of TCs that propagate far inland is often underestimated and can cause unexpected loss of life and economic loss. This dissertation aims to understand the decay process of TCs during the post-landfall stage by answering three main research questions: (1) What are the general patterns of inland tropical cyclones, including spatial variations, decay rates, and translation speeds? (2) Are there temporal changes in the intensity decay from inland moving hurricanes? (3) How is the hurricane post-landfall dissipation related to …

Winding Down River Road, Gillian Harper

LSU Master's Theses

As a mechanism to explore my temporary home in Louisiana, Winding Down River Road is a collection of artworks that integrates natural materials collected from landscapes in southern Louisiana with steel and petroleum-based products. My interest in researching environmental issues, ecology, and industry has shaped my vehicles for observation and how I generate data. Through a variety of methodologies, I am considering how climate change is forcing many of us to re-contextualize how our home can be affected by the very industries we rely on. Personal engagement with residents living in the dystopian atmosphere of southern Louisiana’s industrial corridor and …

Local And State Climate Initiatives In Louisiana Since 2005: Content And Thematic Analyses, Jessie F. Parrott

LSU Master's Theses

Louisiana is uniquely exposed to severe weather because of its geography and climate. Louisiana’s extreme weather is exacerbated by anthropogenic climate change, which will worsen in the future. The risks its population and environment are exposed to has generated several policies and planning documents, nine of which are analyzed in this thesis. Three plans are from the state level, three are from the parish level, and three are from the urban (New Orleans) level. These planning documents pose various adaptation and mitigation actions to ameliorate and address multiple climate issues. These actions utilize specific mitigation strategies. The content and thematic …

Titaniferous-Vanadiferous, Magnetite-Ilmenite Mineralization In A Mafic Suite Within The Chhotanagpur Gneissic Complex, Bihar, India, Ashmeer Mohammad, Anup K. Prasad, Kehe-U Wetsah, Mohammad Azad, Vivek Aryan, Hesham El-Askary

Mathematics, Physics, and Computer Science Faculty Articles and Research

Titanium or vanadium metals or their alloys are important industrial metals/alloys. Because these resources are in short supply, the investigation of potential titaniferous-vanadiferous deposits needs special attention to bridge the supply-demand gap. The study integrates geological, geochemical, remote sensing, and geophysical data for assessing the potentiality of titaniferous-vanadiferous, magnetite-ilmenite mineralization in and around the Sudamakund and Paharpur areas, Gaya and Jehanabad districts, Bihar, India, and delineation of specific targets for detailed exploration. Field visits for large scale mapping on (1:12,500 scale) were used to conduct a reconnaissance survey for magnetite-ilmenite mineralization in parts of toposheet number 72G/04 in the Gaya …

Tropical Cyclone Storm Surge Detection In Slash Pine Radial Growth Along The Northern Gulf Of Mexico Coastline, Alyssa C. Crowell

Master's Theses

My thesis examines the ecological impact of tropical cyclone (TCs) storm surge on coastal slash pine (Pinus elliottii var. elliottii Engelm) communities along the Gulf of Mexico in the southern United States (U.S.). Previous research has shown slash pine radial growth trends can be examined to identify long and short-term growth changes associated with TC passage, providing insight into overall stand health and resiliency through time. However, this previous research encompasses just one site in Mississippi. My thesis expands the spatial footprint of TC-surge impact on slash pine radial growth with the addition of three new sites.

I examined …

A Gis Suitability Model Evaluating Habitat Characteristics Influencing Beaver (Castor Canadensis) Lodge Site Selection And Lodge Occupancy In Central Adirondacks, New York, Amanda K. Jacobs

Theses - ALL

The North American beaver (Castor canadensis) represents a quintessential example of an "ecosystem engineer." Yet the species' landscape-scale impacts on hydrology, geomorphology, and ecosystem ecology are not uniformly distributed through landscapes or time. Understanding beaver lodge site selection and lodge fidelity through time can help to predict where the greatest effects of beaver activity may occur. In this research project, I seek to understand the relationships between beaver habitat suitability, the habitat variables that currently define suitable areas, and lodge occupancy over time. Using Geographic Information Systems (GIS) to model habitat suitability, I use hydrologic, vegetative, and physiographic variables to …

Residents' Perspectives Of Young, Street-Facing Trees: Three Cases From Legacy Cities With Active Tree Planting Initiatives, Alicia Coleman

Doctoral Dissertations

Organized tree planting initiatives are underway in cities across the world in order to expand tree canopy cover, combat environmental threats, and create more livable places for urban residents. Trees along and near city streets provide a number of services for residents; however, evidence from environmental design and landscape preference research suggests that the perceptual effect of large-statured, mature trees may differ from small-statured, young trees. This dissertation explored these differences in three studies based in communities with active tree planting initiatives. Chapter 2 compares tree preferences from a hypothetical tree planting initiative to preferences for trees in other settings …

Air Quality And Vehicular Emissions: Evaluating Vehicular Emission Contributions To And Distribution Of Ambient Particulate Matter Pollution With Low-Cost Sensors In Richmond, Virginia, Morgan Malstead

Environmental Studies Senior Seminar Projects

Hazardous air quality prematurely kills millions of people a year and exacerbates underlying health issues for millions more. Unsafe levels of particulate matter are typically associated with newly industrialized and developing countries, however, this is a misconception, especially when considering ambient air pollutants in densely packed urban areas. According to the Airbeam and Purple Air data collected on 07/15/2021, Richmond, Virginia has good air quality with the vast majority of values falling below the United States Environmental Protection Agency annual PM2.5 standard of 12 micrograms per cubic meter (μg/m3). Vehicular emissions may not account for a large percentage of PM2.5 …