Earth Sciences Commons^™

Hydrogeomorphic Response Of Fluvial Systems To Climate Change - An Example From James River, Missouri, Afrida Aranya

Graduate Theses/Dissertations

Climate change has led to unpredictable hydrological patterns, significantly altering the fluvial environment and their flow regime. Despite extensive research, our knowledge about the impacts of climate change on flow regimes in the US Midwest is limited, particularly in karst-dominated fluvial landscapes. This research addresses this gap by investigating the effects of climatic change on the hydrogeomorphology of the James River, located in the karst-dominated Ozark Highlands in southwest Missouri, USA. The study focuses on two ~1.5 km stream segments—one relatively active and one stable in the context of geomorphology—near Springfield, Missouri. The research aims to (i) understand the changing …

The Geodetic Strain Rates From Gnss In The North American-Carribean-Cocos Triple Junction In Guatemala And Implications For Seismic Hazard, Tanaya Kashyap

Masters Theses

"Geodetic velocity data are pivotal for deciphering seismic risks, providing initial constraints for crustal surface strain rates. Gaining an understanding of the 2D surface strain tensor across an entire area necessitates knowledge of the surface velocity field, yet geodetic data such as measurements from the Global Navigation Satellite System (GNSS) are dispersed across the Earth’s surface. In the current scope of study, we have employed various methodologies to estimate strain rates in Guatemala, utilizing GNSS velocity data and leveraging the open-source Python tool Strain_2D. Strain_2D facilitates the computation of strain rates through diverse methods applied to the same dataset and …

Assessing Stormwater Management Pond Water Quality, Function, And The Potential Biotic Effects To Receiving Waters, Mitchell Elstone

Theses and Dissertations (Comprehensive)

The use of stormwater management ponds (SWMPs) has been increasing over the past five decades. However, an in-depth understanding of the daily performance of SWMPs and functionality during cold periods is limited. This is in part because mandated monitoring is relatively infrequent, and the assumption that SWMPs are inactive between storm events and during the winter. The goals of this research were to better understand daily stormwater (SW) characteristics, the performance of SWMPs based on current forms of evaluation and assess the potential for SWMP effluent to impact downstream biota. Influent and effluent samples from two SWMPs were collected daily …

Re-Evaluating Missouri’S Strategic Element Potential: A Geochemical Study Of The Mesoproterozoic Fe-Cu-Co-Ree Deposits In Southeast Missouri, Usa, Brandon James Sullivan

Doctoral Dissertations

"Iron-oxide-copper-gold (IOCG) deposits are poorly understood mineral systems. For example, we do not know why Cu- and Co-rich IOCG deposits typically occur proximal to Fe ore deposits that are notably Cu and Co-poor, such as Iron Oxide Apatite (IOA) deposits. To better understand the formation of IOA and IOCG deposits in Missouri, USA, this PhD thesis examines the genesis of the Kratz Spring IOA and the Boss Central Dome IOCG deposits. This study presents the first constraints on formation conditions and fluid sources in the studied deposits using integrated petrographic, mineral composition, and Fe isotope analyses of oxide minerals. Observations …

Unraveling Sources Of Cyanate In The Marine Environment: Insights From Cyanate Distributions And Production During The Photochemical Degradation Of Dissolved Organic Matter, Rui Wang, Jihua Liu, Yongle Xu, Li Liu, Kenneth Mopper

Chemistry & Biochemistry Faculty Publications

Cyanate is a nitrogen and energy source for diverse marine microorganisms, playing important roles in the nitrogen cycle. Despite the extensive research on cyanate utilization, the sources of this nitrogen compound remain largely enigmatic. To unravel the sources of cyanate, distributions and production of cyanate during photochemical degradation of natural dissolved organic matter (DOM) were investigated across various environments, including freshwater, estuarine, coastal areas in Florida, and the continental and slope regions of the North American mid-Atlantic Ocean (NATL). Cyanate production was also examined during the photochemical degradation of exudates from a typical strain of Synechococcus, an important phytoplankton …

Reducing The Uncertainty In Estimating Soil Microbial-Derived Carbon Storage, Han Hu, Chao Qian, Ke Xue, Rainer Georg Jörgensen, Marco Keiluweit, Chao Liang, Xuefeng Zhu, Ji Chen, Yishen Sun, Haowei Ni, Jixian Ding, Weigen Huang, Jingdong Mao, Rong-Xi Tan, Jizhong Zhou, Thomas W. Crowther, Zhi-Hua Zhou, Jiabao Zhang, Yuting Liang

Chemistry & Biochemistry Faculty Publications

Soil organic carbon (SOC) is the largest carbon pool in terrestrial ecosystems and plays a crucial role in mitigating climate change and enhancing soil productivity. Microbial-derived carbon (MDC) is the main component of the persistent SOC pool. However, current formulas used to estimate the proportional contribution of MDC are plagued by uncertainties due to limited sample sizes and the neglect of bacterial group composition effects. Here, we compiled the comprehensive global dataset and employed machine learning approaches to refine our quantitative understanding of MDC contributions to total carbon storage. Our efforts resulted in a reduction in the relative standard errors …

Potentially Massive And Global Non-Pyrogenic Production Of Condensed "Black" Carbon Through Biomass Oxidation, Aleksandar I. Goranov, Hongmei Chen, Jianshu Duan, Satish C. B. Myneni, Patrick G. Hatcher

Chemistry & Biochemistry Faculty Publications

With the increased occurrences of wildfires worldwide, there has been an increase in scientific interest surrounding the chemistry of fire-derived "black" carbon (BC). Traditionally, wildfire research has assumed that condensed aromatic carbon (ConAC) is exclusively produced via combustion, and thus, ConAC is equated to BC. However, the lack of correlations between ConAC in soils or rivers and wildfire history suggests that ConAC may be produced non-pyrogenically. Here, we show quantitative evidence that this occurs during the oxidation of biomass with environmentally ubiquitous hydroxyl radicals. Pine wood boards exposed to iron nails and natural weather conditions for 12 years yielded a …

Using Phenology To Unravel Differential Soil Water Use And Productivity In A Semiarid Savanna, Blake Steiner, Russell L. Scott, Jia Hu, Natasha Mcbean, Andrew Richardson, David J. P. Moore

University Administration Publications

Savannas are water-limited ecosystems characterized by two dominant plant types: trees and an understory primarily made up grass. Different phenology and root structures of these plant types complicate how savanna primary productivity responds to changes in water availability. We tested the hypothesis that productivity in savannas is controlled by the temporal and vertical distribution of soil water content (SWC) and differences in growing season length of understory and tree plant functional types. To quantify the relationship between tree, understory, and savanna-wide phenology and productivity, we used PhenoCam and satellite observations surrounding an eddy covariance tower at a semiarid savanna site …

Water Quality Contaminants Long-Term Spatial Analysis Along The Upper Clark Fork River Superfund Site Between Warm Springs And Garrison, Montana, Raegan Michele Osentowski

Undergraduate Theses, Professional Papers, and Capstone Artifacts

Long-term data of heavy metal contaminants, cadmium, copper, lead, arsenic, and zinc were compiled from the Montana Department of Environmental Quality, DEQ, and the United States Geological Survey, USGS, to investigate the effects of remediation on water quality along the upper Clark Fork River superfund site. Long-term data sets were analyzed at CFR-03A, CFR-27H, CFR-34, and SS-25 along the upper Clark Fork River and Silver Bow Creek. CFR-03A and CFR-27H had full remediation in the immediate vicinity, SS-25 had on-going remediation in the immediate vicinity, and CFR-34 had no remediation in the immediate vicinity. Analysis of heavy metal contaminants is …

121, Scott Brande

All 3D Rock Models

Model 121 - granite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/121-e1e6025763a1493085ee2d9f63c641dd

163, Scott Brande

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Model 163 - bituminous coal - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/163-c2903dfb82bc4f05bf7b3556edf8d4ef

115, Scott Brande

All 3D Rock Models

Model 115 - diorite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/115-298e4710804d4faba714d28c4a80ae78

137, Scott Brande

All 3D Rock Models

Model 137 - rhyolite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/137-8b7ec8ed92fe47559004e87e9aacbb16

167, Scott Brande

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Model 167 - chalk - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/167-1b6dc09a191b4069b0eeae2f9469b77f

164, Scott Brande

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Model 164 - breccia - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/164-6253af9d9ba5431f89204f20b38aa204

162, Scott Brande

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Model 162 - bituminous coal - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/162-135d93a3662248b19017ce280564e780

168, Scott Brande

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Model 168 - chalk - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/168-7a3b2f1e132848378562b32fd2996d26

177, Scott Brande

All 3D Rock Models

Model 177 - conglomerate - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/177-cbc131f6325143dcba1af1c0bf002212

184, Scott Brande

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Model 184 - oolite - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/184-df419a6f77294da7be22a056580b6f81

188, Scott Brande

All 3D Rock Models

Model 188 - sandstone - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/188-5e29c75d2fa340f6a2d0d27ecb44d4ba

194, Scott Brande

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Model 194 - shale - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/194-38eb855877444452be7a0eca7946576f

196, Scott Brande

All 3D Rock Models

Model 196 - travertine - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/196-cd4b91a677cd43ab932ee8b5ca38b38c

198, Scott Brande

All 3D Rock Models

Model 198 - travertine - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/198-c0f51601873e409d995164b8e0e0cd1e

202, Scott Brande

All 3D Rock Models

Model 202 - amphibolite - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/202-dbe54d200c7f45df837ce0b78b8860bf

199, Scott Brande

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Model 199 - amphibolite - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/199-c6b2caf11c87467a812dcda87b60f4d3

205, Scott Brande

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Model 205 - gneiss - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/205-63ecacc4aa794f13aa281cf43e8a71f3

206, Scott Brande

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Model 206 - gneiss - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/206-baecc27f1eb245b89fbcbd3829006c9c

212, Scott Brande

All 3D Rock Models

Model 212 - quartzite - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/212-65709a84e3944a5bbacd19057ca55d5f

213, Scott Brande

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Model 213 - quartzite - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/213-3a45643dca144f3684041fc0ec3c5a84

216, Scott Brande

All 3D Rock Models

Model 216 - schist - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/216-24ea19fa4ae04a09a9d5828b2f784f7a