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Articles 14491 - 14520 of 59520
Full-Text Articles in Earth Sciences
Geological Structure Detection With Tunnel Transient Electromagnetic Kirchhoff 2d Migration Imaging, Qi Zhipeng, Guo Jianlei, Sun Naiquan, Li Xiu, Fan Yanan
Geological Structure Detection With Tunnel Transient Electromagnetic Kirchhoff 2d Migration Imaging, Qi Zhipeng, Guo Jianlei, Sun Naiquan, Li Xiu, Fan Yanan
Coal Geology & Exploration
The green construction of tunnel requires not only predicting disaster anomalies such as water inrush and mud inrush in front of tunnel face, but also identifying geological structure to support disaster warning and prevention. The traditional transient electromagnetic interpretation method can only provide resistivity information, which not meet the requirements of tunnel geological disaster management. Therefore, virtual wavefield imaging technology is introduced into the tunnel detection to achieve comprehensive interpretation of the electrical information and structures of disaster anomalies. Firstly, transient electromagnetic data is transformed into virtual wave field. Then, the resistivity imaging method was used to calculate the resistivity …
Within‑Marsh And Landscape Features Structure Ribbed Mussel Distribution In Georgia, Usa, Marshes, William K. Annis, Elizabeth A. Hunter, John M. Carroll
Within‑Marsh And Landscape Features Structure Ribbed Mussel Distribution In Georgia, Usa, Marshes, William K. Annis, Elizabeth A. Hunter, John M. Carroll
United States Geological Survey: Staff Publications
Ribbed mussels, Geukensia demissa, are marsh fauna that are used in coastal management and restoration due to the ecosystem services they provide. Ribbed mussel restoration efforts may be improved with a greater understanding of the environmental drivers of ribbed mussel distribution at multiple spatial scales to predict areas where restoration could be successful. This study sought to estimate the effects of within-marsh (4 m) and landscape (500 m) factors on ribbed mussel distribution. Ribbed mussel densities were surveyed at 11 sites along the coast of Georgia, USA, and overlaid with spatial data for within-marsh factors (elevation, distance to marsh …
Climatic Backdrop For Pueblo Cultural Development In The Southwestern United States, Victor J. Polyak, Yemane Asmerom, Matthew S. Lachniet
Climatic Backdrop For Pueblo Cultural Development In The Southwestern United States, Victor J. Polyak, Yemane Asmerom, Matthew S. Lachniet
Geoscience Faculty Research
While climatic triggers for collapse and population migrations of ancestral Pueblo communities have been proposed, little is known about the overall climatic backdrop for the entire pre-Hispanic Pueblo period (ca. 1300 to 460 B2K). Here, we report data from stalagmite HC-1, from Hidden Cave, Guadalupe Mountains, New Mexico, covering the past 3400 years, showing an interval of increased frequency of droughts from 1260 to 370 yr B2K that is coeval with the entire pre-Hispanic Pueblo period. Our record suggests that this puebloan Late Holocene climatic interval was the most arid and highly variable climatic period of the last 3400 years. …
Utilizing Novel Field And Data Exploration Methods To Explore Hot Moments In High-Frequency Soil Nitrous Oxide Emissions Data: Opportunities And Challenges, Christine S. O'Connell, Tyler L. Anthony, Melanie A. Mayes, Tibisay Pérez, Debjani Sihi, Whendee L. Silver
Utilizing Novel Field And Data Exploration Methods To Explore Hot Moments In High-Frequency Soil Nitrous Oxide Emissions Data: Opportunities And Challenges, Christine S. O'Connell, Tyler L. Anthony, Melanie A. Mayes, Tibisay Pérez, Debjani Sihi, Whendee L. Silver
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Soil nitrous oxide (N2O) emissions are an important driver of climate change and are a major mechanism of labile nitrogen (N) loss from terrestrial ecosystems. Evidence increasingly suggests that locations on the landscape that experience biogeochemical fluxes disproportionate to the surrounding matrix (hot spots) and time periods that show disproportionately high fluxes relative to the background (hot moments) strongly influence landscape-scale soil N2O emissions. However, substantial uncertainties remain regarding how to measure and model where and when these extreme soil N2O fluxes occur. High-frequency datasets of soil N2O fluxes are newly possible …
Statistical Characteristics Of High-Frequency Gravity Waves Observed By An Airglow Imager At Andes Lidar Observatory, Alan Z. Liu, Bing Cao
Statistical Characteristics Of High-Frequency Gravity Waves Observed By An Airglow Imager At Andes Lidar Observatory, Alan Z. Liu, Bing Cao
Publications
The long-term statistical characteristics of high-frequency quasi-monochromatic gravity waves are presented using multi-year airglow images observed at Andes Lidar Observatory (ALO, 30.3° S, 70.7° W) in northern Chile. The distribution of primary gravity wave parameters including horizontal wavelength, vertical wavelength, intrinsic wave speed, and intrinsic wave period are obtained and are in the ranges of 20–30 km, 15–25 km, 50–100 m s−1, and 5–10 min, respectively. The duration of persistent gravity wave events captured by the imager approximately follows an exponential distribution with an average duration of 7–9 min. The waves tend to propagate against the local background winds and …
Meningococcal Meningitis In Sub-Saharan Africa: A Review, Amit U. Raysoni
Meningococcal Meningitis In Sub-Saharan Africa: A Review, Amit U. Raysoni
School of Earth, Environmental, & Marine Sciences Faculty Publications
The scourge of Meningococcal Meningitis in the Sub-Saharan African nations is well known. This review paper focuses on this very important topic and describes the symptoms, diagnoses, and available vaccines for the same. The review then focuses on the Meningitis Belt of Africa and elucidates on the introduction of MenAfriVac™ vaccine. The review ends with the success of this vaccine and the future of Meningococcal Meningitis in the context of overall global climate change.
Groundwater Monitoring Analysis And Management Recommendations In California: Cuyama And Santa Cruz Mid-County, Kayla M. Souza
Groundwater Monitoring Analysis And Management Recommendations In California: Cuyama And Santa Cruz Mid-County, Kayla M. Souza
Master's Projects and Capstones
Groundwater is an essential water resource, accounting for about 40 percent of supply in California and 80 percent in the Central Coast hydrologic region, but significant monitoring data gaps have limited sustainable management efforts. Twenty-four basins within the Central Coast hydrologic region were identified as critically overdrafted in 2014. For this study, two basins were chosen based on differing sustainability concerns so that a comparative analysis could be performed on the groundwater monitoring methods. I obtained original groundwater elevation data reported (2000-2020) from the various groundwater monitoring organization wells to the California Department of Water Resources (DWR) within the Cuyama …
Influences Of Seasonality And Habitat Quality On Great Lakes Coastal Wetland Fish Community Composition And Diets, Sara N. Diller, Anna M. Harrison, Kurt P. Kowalski, Valerie J. Brady, Jan J. H. Ciborowski, Matthew J. Cooper, Joshua D. Dumke, Joseph P. Gathman, Carl R. Ruetz Iii, Donald G. Uzarski, Douglas A. Wilcox, Jeffrey S. Schaeffer
Influences Of Seasonality And Habitat Quality On Great Lakes Coastal Wetland Fish Community Composition And Diets, Sara N. Diller, Anna M. Harrison, Kurt P. Kowalski, Valerie J. Brady, Jan J. H. Ciborowski, Matthew J. Cooper, Joshua D. Dumke, Joseph P. Gathman, Carl R. Ruetz Iii, Donald G. Uzarski, Douglas A. Wilcox, Jeffrey S. Schaeffer
United States Geological Survey: Staff Publications
Great Lakes coastal wetlands (GLCW) have been severely degraded by anthropogenic activity over the last several decades despite their critical role in fish production. Many Great Lakes fish species use coastal wetland habitats for spawning, feeding, shelter, and nurseries throughout the year. The goal of our study was to compare GLCW fish community composition in the spring, summer, and fall months and investigate how water quality relates to fish diversity, the presence of functional groups, and juvenile fish diets. We summarized fish data collected from GLCW across the basin and used the coastal wetland monitoring program’s water quality-land use indicator …
Mgrre_Lithstriplog_Gere 1_21005008860000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Gere 1_21005008860000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Redder 1_21005070310000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Redder 1_21005070310000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Wolters, S. S. 1_21005077900000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Wolters, S. S. 1_21005077900000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Buskirk, Henry 1_21005075730000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Buskirk, Henry 1_21005075730000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Snell, B. 1_21005077830000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Snell, B. 1_21005077830000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_May, James H. & Wilma 1_21005096930000, Mgrre Western Michigan University
Mgrre_Lithstriplog_May, James H. & Wilma 1_21005096930000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Vanderwiede, A. & R. And Boeskool, H. 1_21005064570000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Vanderwiede, A. & R. And Boeskool, H. 1_21005064570000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Humphrey, Clarence & Carrie 1_21005007180000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Humphrey, Clarence & Carrie 1_21005007180000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Charbonneau, J Henry 1_21011163540000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Charbonneau, J Henry 1_21011163540000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Graczyk, Peter 1_21005085890000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Graczyk, Peter 1_21005085890000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Pifer, Mrs, Catherine 1_21005056070000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Pifer, Mrs, Catherine 1_21005056070000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Helein Agnes 1_21011037050000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Helein Agnes 1_21011037050000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Peavy 3_21011044280000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Peavy 3_21011044280000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Adams Township Land 1_21011095000000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Adams Township Land 1_21011095000000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Staebler, John R. 1_21011110950000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Staebler, John R. 1_21011110950000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Post, Lovell 7_21011119890000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Post, Lovell 7_21011119890000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Keef, Wm 4_21011129740000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Keef, Wm 4_21011129740000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Vaughan, Anita W 1_21011180180000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Vaughan, Anita W 1_21011180180000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Franklin, Woodrow 1_21011190700000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Franklin, Woodrow 1_21011190700000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Brooks, Nellie Et Al 1_21011197960000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Brooks, Nellie Et Al 1_21011197960000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Lewis & Ball 1_21011201640000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Lewis & Ball 1_21011201640000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Ellison, Katie 1_21011380210000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Ellison, Katie 1_21011380210000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.