Physical Sciences and Mathematics Commons^™

Assessing Growth Response To Climate Controls In A Great Basin Artemisia Tridentata Plant Community, Lorenzo F. Apodaca

UNLV Theses, Dissertations, Professional Papers, and Capstones

An assessment of the growth response of key vegetative species to climatic variability is vital to identifying possible local impacts on ecosystems faced with imminent climate change. With current climate projections in Nevada predicting a shift to an even more arid climate with greater year-to-year variability, the imperative exists to identify the effects of specific climatic controls on plant growth and to research methods to assess large-scale vegetative changes, especially in more remote areas where readily available data sets may be lacking. This study utilized annual growth ring indices constructed from big sagebrush (Artemisia tridentatassp.tridentata) stems collected in Spring Valley, …

Impacts Of Climate Changes On The Spatiotemporal Distribution Of Precipitation In The Western United States, Peng Jiang

UNLV Theses, Dissertations, Professional Papers, and Capstones

Precipitation in the Intermountain West is characterized by its great variability in both spatial and temporal distributions. Moreover, the spatiotemporal distribution of the precipitation is changing due to the climate changes. In this dissertation, three studies are conducted to investigate the multi-scale temporal variability of precipitation, the performance of current climate models on this variability, the influence of large-scale ocean oscillations on heavy precipitation, and the impact of human induced global warming on storm properties.

The first study is to examine the performance of current climate models on the simulation of the multi-scale temporal variability determined from the observed station …

Temperature Trends And Urban Heat Island Intensity Mapping Of The Las Vegas Valley, Adam Leland Black

UNLV Theses, Dissertations, Professional Papers, and Capstones

Modified urban climate regions that are warmer than rural areas at night are referred to as Urban Heat Islands or UHI. Islands of warmer air over a city can be 12 degrees Celsius greater than the surrounding cooler air. The exponential growth in Las Vegas for the last two decades provides an opportunity to detect gradual temperature changes influenced by an increasing presence of urban materials. This thesis compares ground based thermometric observations and satellite based remote sensing temperature observations to identify temperature trends and UHI areas caused by urban development.

Analysis of temperature trends between 2000 and 2010 at …

Understanding Basin Specific Life History Characteristics Of Lake Mead Quagga Mussels (Dreissena Bugensis) And A Potential Treatment Using Uv Radiation In Laboratory Studies, Melissa Thaw

UNLV Theses, Dissertations, Professional Papers, and Capstones

The quagga mussel (Dreissena bugensis) is an aquatic invasive species that is spreading throughout Lake Mead and other western waterways. Unlike their native waters in Eurasia, Lake Mead exhibits year round warm temperatures, high calcium levels and a lack of natural predators, all of which are very favorable conditions for their growth and spread. Dreissena bugensis reproduce and colonize hard surfaces rapidly, where they filter large amounts of water. They disrupt the aquatic food chain and interfere with infrastructure that is exposed to lake water. There is an urgent need to understand Dreissena bugensis life history characteristics within this new …

Reaching Nevada's Teachers Through Nsf Epscor Climate Change Science Institutes, Aubrey Mae Bonde, Larry Rudd, Paul Buck, Juan Mcalister

American Association for the Advancement of Science Pacific Conference

Education Component Goals

• Increase the number and quality of STEM educators and STEM professionals in the region and country
• Develop institutional partnerships that support exemplary practices and policies in STEM education
• Implement inquiry activities focusing on facets of climate change science and promote interest in STEM career pathways and higher education

Climate Change Connected Curriculum, Southern Nevada Science Teachers Association

American Association for the Advancement of Science Pacific Conference

Climate change is a complex global issue that spans many disciplines. The curriculum spans several subject areas and cuts across national standards.

Our team will focus on creating lesson plans to cover a span of two weeks; i.e. one unit on Climate Change .

The SAME concepts will be taught in the SAME week to the SAME 9th and 12th grade students; with a focus on those concepts in specific subject areas.

Using Online Data Sets To Teach K-12 Students And Teachers About Climate Change, Larry Rudd

American Association for the Advancement of Science Pacific Conference

• Description of project

• Data-based Activities

• Inservice Teacher Use and Feedback

• Preservice Teacher Use and Feedback

• Future Work

• Conclusions

• Discussion

The Evaluation Of Water Storage In Death Valley Using Grace Satellite Data, Maile Sweigart

UNLV Theses, Dissertations, Professional Papers, and Capstones

As drought conditions spread across the United States, concerns over water supplies, water use, and water management policies are growing and possible contributing environmental factors are continually being scrutinized. This thesis examines Death Valley as an analog for Southern Nevada and utilizes NASA EOS data, combined with ancillary climate data, to assess the effect of decadal climate variability on groundwater storage in the Death Valley area. Historical climate data, combined with satellite imagery observations, were compiled and calculated for analyses. Conclusions derived from statistical analyses infer trends between GRACE (Gravity Recovery and Climate Experiment) satellite data and fluctuating levels of …

Understanding Effects Of Changes In Land Use, Environmental Parameters, Habitat Characteristics On The Great Basin Aquatic Invertebrates Using Ecological Stoichiometric Theory, Knut Mehler

UNLV Theses, Dissertations, Professional Papers, and Capstones

Many freshwater ecosystems in the Great Basin have undergone dramatic alteration over the past decades due to groundwater withdrawal, water diversion and changes in land use. These changes have affected benthic food web dynamics by altering the availability of chemical key elements for primary and secondary producers, by loss of biodiversity and extinction of endemic species. However, only few studies are available that addresses the link between changes in land use, habitat characteristics and its effects on benthic macroinvertebrates (BMI) communities comprehensively and little attention has been given to integrating physiochemical aspects to link ecosystem functions.

This dissertation analyzes the …

Soil Moisture Recognition And The Spatial Distribution Of Storm Activity In The Mojave Desert Using High-Resolution Aster And Modis Imagery For Thermophysical Mapping, Russell J. Skuse

UNLV Theses, Dissertations, Professional Papers, and Capstones

Climate models suggest that the Mojave Desert ecoregion is vulnerable to becoming drier in the future, and as the human population grows and development increases, environmental stresses will likely increase. Determining the spatial distribution and variation of soil moisture on a regional scale is an essential component to climate change, hydrologic, and habitat analyses. Soil permeability and sediment stability are characteristics that have been shown to be measurable from remote sensing observations. The primary objective of this project is to map the mechanical composition of the surface materials in the Mojave Desert ecoregion with implications for soil permeability, sediment stability, …

Integrating, Developing, And Testing Methods To Generate More Cohesive Approaches To Biogeographic Inference, Mallory Elizabeth Eckstut

UNLV Theses, Dissertations, Professional Papers, and Capstones

As a fundamental component of the developing discipline of conservation biogeography, broadscale analyses of biotic assembly and disassembly across multiple temporal and spatial scales provide an enhanced understanding of how geologic transformations and climate oscillations have shaped extant patterns of biodiversity. As with any scientific field, there are limitations in the case of biogeographic historical reconstructions. Historical reconstructions are only as robust as the theoretical underpinnings of the methods of reconstruction (including data collection, quality, analysis, and interpretation). Nevertheless, historical reconstructions of species distributions can help inform our understanding of how species respond to environmental change.

My dissertation takes a …

Century Wide Hydrologic Trends And Shifts In Colorado River Basin, Soumya Sagarika, Ajay Kalra, Sajjad Ahmad

College of Engineering: Graduate Celebration Programs

To evaluate the long-term trends and step (abrupt change) changes in three hydrologic variables: temperature, precipitation, and streamflow over a century wide time frame in Colorado River Basin.

The Effects Of Climate Science Literacy And Cultural Polarization Around Climate Change Risk Perception, Gabriel R. Young, Helen R. Neill

Graduate Research Symposium (GCUA) (2010 - 2017)

Science communicators have struggled to provide meaningful information about climate change due to the complex nature of the problem and the polarized political and media landscapes, and yet, a well informed public is a crucial element to both public acceptance and policy initiatives aimed at climate change mitigation. Current literature suggests that scientific literacy actually increases cultural polarization around the issue of climate change (Kahan, 2012). This study adds to the literature by testing the hypothesis that climate change risk perception is more heavily tied to climate science literacy than general science literacy when controlling for cultural worldviews. We use …

Investigating Perspectives Of Rural Nevadans On Climate Change Solutions, Tricia Dutcher

Graduate Research Symposium (GCUA) (2010 - 2017)

Rural perspectives are important for the issue of climate change. Rural areas are high concentrations of active voters who deny the problem of anthropogenic climate change. Rural residents also face decisions about inviting large, utility scale renewable energy developments in their areas. This research examines rural Nevadan’s perspectives on climate change to offer insights about the relationship between climate change perceptions and communication strategies. The research offers policy implications that address context specific issues, solution-oriented dialogue, and interest matching to mitigate anthropogenic climate change.

Changing Policy Without Changing Law: Addressing Climate Change Under The Clean Air Act, Philip Wallach

Brookings Scholar Lecture Series

The evolution of our national climate change policy at the Environmental Protection Agency (EPA) from the 1990s-2000s, is marked by a backdrop of congressional inaction. In 2007, litigation (Massachusetts v. EPA) required the EPA to re-interpret the Clean Air Act to also apply to greenhouse gases. This presentation will include a summary of the legal arguments in that case, and the narrow Supreme Court decision that supported the petitioners; a review of the legal and practical challenges emanating from this ruling; and consideration of the EPA's impact on continuing legislative debates. The speaker will explore the impact of this decision …