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Articles 1 - 30 of 158
Full-Text Articles in Physical Sciences and Mathematics
Land Use Land Cover Change Effects On Southern Great Plains Precipitation, Alexandra Caruthers
Land Use Land Cover Change Effects On Southern Great Plains Precipitation, Alexandra Caruthers
Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research
Great Plains land use has changed substantially over the last 160 years, altering the properties of the land through increased settlement and advances in irrigation. Changing the interface between the land and atmosphere has implications for the atmospheric boundary layer, the regional circulation, the local surface energy budget and resulting precipitation patterns. Land use land cover (LULC) changes are an important topic for this region due to its heavy dependence on agriculture. This study investigates differences in Southern Great Plains precipitation patterns between four LULC scenarios: the pre-settlement, 1920’s, Dust Bowl and present day eras. Using the Weather Research and …
Weather And Climate Summary And Forecast: December 2017 Report, Gregory V. Jones
Weather And Climate Summary And Forecast: December 2017 Report, Gregory V. Jones
Linfield University Wine Studies Reports
This report provides a summary of the weather and climate forecast for December 2017. It includes forecast information specific to the Pacific Northwest and the western United States, as well as forecast information for other portions of the United States and abroad.
Catastrophic Failure Of Nacre Under Pure Shear Stresses Of Torsion, Saleh Alghamdi, Ting Tan, Christopher Hale-Sills, Floyd Vilmont, Tian Xia, Jie Yang, Dryver Huston, Mandar Dewoolkar
Catastrophic Failure Of Nacre Under Pure Shear Stresses Of Torsion, Saleh Alghamdi, Ting Tan, Christopher Hale-Sills, Floyd Vilmont, Tian Xia, Jie Yang, Dryver Huston, Mandar Dewoolkar
College of Engineering and Mathematical Sciences Faculty Publications
Nacre, a composite made from biogenic aragonite and proteins, exhibits excellent strength and toughness. Here, we show that nacreous sections can exhibit complete brittle fracture along the tablet interfaces at the proportional limit under pure shear stresses of torsion. We quantitatively separate the initial tablet sliding primarily resisted by nanoscale aragonite pillars from the following sliding resisted by various microscale toughening mechanisms. We postulate that the ductility of nacre can be limited by eliminating tablet interactions during crack propagations. Our findings should help pursuing further insights of layered materials by using torsion.
Mining Drives Extensive Deforestation In The Brazilian Amazon, Laura J. Sonter, Diego Herrera, Damian J. Barrett, Gillian L. Galford, Chris J. Moran, Britaldo S. Soares-Filho
Mining Drives Extensive Deforestation In The Brazilian Amazon, Laura J. Sonter, Diego Herrera, Damian J. Barrett, Gillian L. Galford, Chris J. Moran, Britaldo S. Soares-Filho
Rubenstein School of Environment and Natural Resources Faculty Publications
Mining poses significant and potentially underestimated risks to tropical forests worldwide. In Brazil's Amazon, mining drives deforestation far beyond operational lease boundaries, yet the full extent of these impacts is unknown and thus neglected in environmental licensing. Here we quantify mining-induced deforestation and investigate the aspects of mining operations, which most likely contribute. We find mining significantly increased Amazon forest loss up to 70 km beyond mining lease boundaries, causing 11,670 km2 of deforestation between 2005 and 2015. This extent represents 9% of all Amazon forest loss during this time and 12 times more deforestation than occurred within mining leases …
Odu Sea Level Rise Initiative Featured In Premier Higher Education Publication, Public Affairs & News Bureau, Old Dominion University
Odu Sea Level Rise Initiative Featured In Premier Higher Education Publication, Public Affairs & News Bureau, Old Dominion University
News Items
No abstract provided.
President Broderick's Leadership In Sea Level Rise Initiative Featured In Nation's Top Higher Education Publication, Public Affairs & News Bureau, Old Dominion University
President Broderick's Leadership In Sea Level Rise Initiative Featured In Nation's Top Higher Education Publication, Public Affairs & News Bureau, Old Dominion University
News Items
No abstract provided.
Community Discussion: Catch The King Tide, Amy Matzke-Fawcett
Community Discussion: Catch The King Tide, Amy Matzke-Fawcett
News Items
No abstract provided.
Community Invited To Discuss King Tide Event, Amy Matzke-Fawcett
Community Invited To Discuss King Tide Event, Amy Matzke-Fawcett
News Items
No abstract provided.
Umphlett Qci Dec 2017, Natalie A. Umphlett
Umphlett Qci Dec 2017, Natalie A. Umphlett
High Plains Regional Climate Center: Personnel Publications
Highlights for the Basin
Temperature and Precipitation Anomalies
Drought
Drought Continues to Cause Impacts
Large Butterfly Migration Across the Plains
High Winds Down Corn Across Nebraska
3-Month Precipitation and Temperature Outlooks
Soil Moisture Conditions
Trend And Acceleration: A Multi-Model Approach To Key West Sea Level Rise, John Tenenholtz
Trend And Acceleration: A Multi-Model Approach To Key West Sea Level Rise, John Tenenholtz
FIU Electronic Theses and Dissertations
Sea level rise (SLR) varies depending on location. It is therefore important to local residents, businesses and government to analyze SLR locally. Further, because of increasing ice melt and other effects of climate change, rates of SLR may change. It is therefore also important to evaluate rates of change of SLR, which we call sea level acceleration (SLA) or deceleration.
The present thesis will review the annual average sea level data compiled at the Key West tidal gauge in Key West, Florida. We use a multi-model approach that compares the results of various models on that data set. The goal …
Flash Droughts: A Review And Assessment Of The Challenges Imposed By Rapid-Onset Droughts In The United States, Jason A. Otkin, Mark Svoboda, Eric D. Hunt, Trent W. Ford, Martha C. Anderson, Christopher Hain, Jeffrey B. Basara
Flash Droughts: A Review And Assessment Of The Challenges Imposed By Rapid-Onset Droughts In The United States, Jason A. Otkin, Mark Svoboda, Eric D. Hunt, Trent W. Ford, Martha C. Anderson, Christopher Hain, Jeffrey B. Basara
Drought Mitigation Center: Faculty Publications
No abstract provided.
Deciphering The Enigma Of Undetected Species, Phylogenetic, And Functional Diversity Based On Good-Turing Theory, Anne Chao, Chun Huo Chiu, Robert K. Colwell, Luiz Fernando S. Magnago, Robin L. Chazdon, Nicholas J. Gotelli
Deciphering The Enigma Of Undetected Species, Phylogenetic, And Functional Diversity Based On Good-Turing Theory, Anne Chao, Chun Huo Chiu, Robert K. Colwell, Luiz Fernando S. Magnago, Robin L. Chazdon, Nicholas J. Gotelli
College of Arts and Sciences Faculty Publications
Estimating the species, phylogenetic, and functional diversity of a community is challenging because rare species are often undetected, even with intensive sampling. The Good-Turing frequency formula, originally developed for cryptography, estimates in an ecological context the true frequencies of rare species in a single assemblage based on an incomplete sample of individuals. Until now, this formula has never been used to estimate undetected species, phylogenetic, and functional diversity. Here, we first generalize the Good-Turing formula to incomplete sampling of two assemblages. The original formula and its two-assemblage generalization provide a novel and unified approach to notation, terminology, and estimation of …
A Comprehensive Framework For The Study Of Species Co-Occurrences, Nestedness And Turnover, Werner Ulrich, Wojciech Kryszewski, Piotr Sewerniak, Radosław Puchałka, Giovanni Strona, Nicholas J. Gotelli
A Comprehensive Framework For The Study Of Species Co-Occurrences, Nestedness And Turnover, Werner Ulrich, Wojciech Kryszewski, Piotr Sewerniak, Radosław Puchałka, Giovanni Strona, Nicholas J. Gotelli
College of Arts and Sciences Faculty Publications
Binary presence–absence matrices (rows = species, columns = sites) are often used to quantify patterns of species co-occurrence, and to infer possible biotic interactions from these patterns. Previous classifications of co-occurrence patterns as nested, segregated, or modular have led to contradictory results and conclusions. These analyses usually do not incorporate the functional traits of the species or the environmental characteristics of the sites, even though the outcomes of species interactions often depend on trait expression and site quality. Here we address this shortcoming by developing a method that incorporates realized functional and environmental niches, and relates them to species co-occurrence …
"Not Yet The End Of The World": Political Cultures Of Opposition And Creation In The Global Youth Climate Justice Movement, John Foran, Summer Gray, Corrie Grosse
"Not Yet The End Of The World": Political Cultures Of Opposition And Creation In The Global Youth Climate Justice Movement, John Foran, Summer Gray, Corrie Grosse
Environmental Studies Faculty Publications
Based on participant observation and in-depth interviews with two dozen young climate justice activists at the U.N. climate summit COP19 in Warsaw, Poland, in November 2013, this research uses the concepts of “political cultures of opposition and of creation” to analyze the political orientations, discourse, and actions of global climate justice activists attempting to impact the negotiation of a universal climate treaty. Capturing relationships among experience, emotions, ideology, idioms, and organization, the concepts of political cultures of opposition and of creation shed light on the ability of these actors to fashion social movements of their own making. Through an analysis …
Regional Sea Level Variability And Trends, 1960-2007: A Comparison Of Sea Level Reconstructions And Ocean Syntheses, M. Carson, A. Köhl, D. Stammer, B. Meyssignac, J. Church, J. Schröter, M. Wenzel, B. Hamlington
Regional Sea Level Variability And Trends, 1960-2007: A Comparison Of Sea Level Reconstructions And Ocean Syntheses, M. Carson, A. Köhl, D. Stammer, B. Meyssignac, J. Church, J. Schröter, M. Wenzel, B. Hamlington
OES Faculty Publications
Several existing statistical and dynamical reconstructions of past regional sea level variability and trends are compared with each other and with tide gauges over the 48 year period 1960-2007, partially predating the satellite altimetry era. Evaluated statistical reconstructions were built from tide-gauge data (TGR), and dynamical reconstructions from ocean data assimilation (ODA) approaches. Although most of the TGRs yield global-mean time series of sea level with trends deviating within ± 0.1 mm yr-1, the spatial anomalies of the trends deviate substantially between the reconstructions over the period predating altimetry. In contrast, TGRs match observed regional trend patterns fairly …
Deglacial Tropical Atlantic Subsurface Warming Links Ocean Circulation Variability To The West African Monsoon, Matthew W. Schmidt, Ping Chang, Andrew O. Parker, Link Ji, Feng He
Deglacial Tropical Atlantic Subsurface Warming Links Ocean Circulation Variability To The West African Monsoon, Matthew W. Schmidt, Ping Chang, Andrew O. Parker, Link Ji, Feng He
OES Faculty Publications
Multiple lines of evidence show that cold stadials in the North Atlantic were accompanied by both reductions in Atlantic Meridional Overturning Circulation (AMOC) and collapses of the West African Monsoon (WAM). Although records of terrestrial change identify abrupt WAM variability across the deglaciation, few studies show how ocean temperatures evolved across the deglaciation. To identify the mechanism linking AMOC to the WAM, we generated a new record of subsurface temperature variability over the last 21 kyr based on Mg/Ca ratios in a sub-thermocline dwelling planktonic foraminifera in an Eastern Equatorial Atlantic (EEA) sediment core from the Niger Delta. Our subsurface …
'Catch The King' Tide With Stormsense On Nov. 5th: How You Can Help Crowd-Source Tidal Flood Event Calibrations For Hampton Roads' Newest Water Level Sensors, Jon Derek Loftis, Harry Wang, David R. Forrest
'Catch The King' Tide With Stormsense On Nov. 5th: How You Can Help Crowd-Source Tidal Flood Event Calibrations For Hampton Roads' Newest Water Level Sensors, Jon Derek Loftis, Harry Wang, David R. Forrest
Presentations
Dr. Derek Loftis presented his recent research related to installing new water level sensors (and some of the early event data the network has captured during Hurricanes Jose and Maria) in many Hampton Roads municipalities with the StormSense Smart Cities project. This presentation also introduces information related VIMS efforts with the CCRFR and local news media in the organization of the 'Catch the King' Tide crowd-sourcing data event using the Sea Level Rise App.
The Impact Of Climate Change On Biodiversity In Nepal: Current Knowledge, Lacunae, And Opportunities, Aishwarya Bhattacharjee, Jose D. Anadon, David L. Lohnman, Tenzing Doleck, Tarendra Lakhankar, Bharat Babu Shrestha, Praseed Thapa, Durga Devkota, Sundar Tiwari, Ajay Jha, Mohan Siwakoti, Naba R. Devkota, Pramod K. Jha, Nir Y. Krakauer
The Impact Of Climate Change On Biodiversity In Nepal: Current Knowledge, Lacunae, And Opportunities, Aishwarya Bhattacharjee, Jose D. Anadon, David L. Lohnman, Tenzing Doleck, Tarendra Lakhankar, Bharat Babu Shrestha, Praseed Thapa, Durga Devkota, Sundar Tiwari, Ajay Jha, Mohan Siwakoti, Naba R. Devkota, Pramod K. Jha, Nir Y. Krakauer
Publications and Research
Nepal has an extreme altitudinal range from 60–8850m with heterogeneous topography and distinct climatic zones. The country is considered a biodiversity hotspot, with nearly a quarter of the land area located in protected areas. Nepal and the surrounding Himalayan region are particularly vulnerable to climate change because of their abrupt ecological and climatic transitions. Tens of millions of people rely on the region’s ecosystem services, and observed and modeled warming trends predict increased climate extremes in the Himalayas. To study the ecological impacts of climate change in Nepal and inform adaptation planning, we review the literature on past, present, and …
The Prairie Post Quarterly Newsletter Of The High Plains Regional Climate Center- October 2017, Natalie Umphlett, Warren Pettee, Crystal J. Stiles
The Prairie Post Quarterly Newsletter Of The High Plains Regional Climate Center- October 2017, Natalie Umphlett, Warren Pettee, Crystal J. Stiles
HPRCC Newsletter
Inside this issue:
Message from the interim director........................................1
Staff spotlight...........................1
Tribal engagement.................2
Product highlights..................3
Update on regional climate conditions..................................4
ENSO tool...................................4
Wind River project..................5
Recent and upcoming travel and activities.............................6
Isolation By Distance, Not Rivers, Control The Distribution Of Termite Species In The Amazonian Rain Forest, Cristian S. Dambros, José W. Morais, Renato A. Azevedo, Nicholas J. Gotelli
Isolation By Distance, Not Rivers, Control The Distribution Of Termite Species In The Amazonian Rain Forest, Cristian S. Dambros, José W. Morais, Renato A. Azevedo, Nicholas J. Gotelli
College of Arts and Sciences Faculty Publications
The spatial distribution of species is affected by dispersal barriers, local environmental conditions and climate. However, the effect of species dispersal and their adaptation to the environment across geographic scales is poorly understood. To investigate the distribution of species from local to broad geographic scales, we sampled termites in 198 transects distributed in 13 sampling grids in the Brazilian Amazonian forest. The sampling grids encompassed an area of 271 500 km2 and included the five major biogeographic regions delimited by Amazonian rivers. Environmental data for each transect were obtained from local measurements and remote sensing. Similar to previous studies, termite …
Environmental Proteomics Reveals Taxonomic And Functional Changes In An Enriched Aquatic Ecosystem, Amanda C. Northrop, Rachel K. Brooks, Aaron M. Ellison, Nicholas J. Gotelli, Bryan A. Ballif
Environmental Proteomics Reveals Taxonomic And Functional Changes In An Enriched Aquatic Ecosystem, Amanda C. Northrop, Rachel K. Brooks, Aaron M. Ellison, Nicholas J. Gotelli, Bryan A. Ballif
College of Arts and Sciences Faculty Publications
Aquatic ecosystem enrichment can lead to distinct and irreversible changes to undesirable states. Understanding changes in active microbial community function and composition following organic matter loading in enriched ecosystems can help identify biomarkers of such state changes. In a field experiment, we enriched replicate aquatic ecosystems in the pitchers of the northern pitcher plant, Sarracenia purpurea. Shotgun metaproteomics using a custom metagenomic database identified proteins, molecular pathways, and contributing microbial taxa that differentiated control ecosystems from those that were enriched. The number of microbial taxa contributing to protein expression was comparable between treatments; however, taxonomic evenness was higher in controls. …
Studying Human Behavior For Species Conservation, Hilary Byerly, Brendan Fisher
Studying Human Behavior For Species Conservation, Hilary Byerly, Brendan Fisher
Rubenstein School of Environment and Natural Resources Faculty Publications
No abstract provided.
Odu Scientists Address Antarctic Ice Melt Affecting Sea Levels, Miasia Osbey
Odu Scientists Address Antarctic Ice Melt Affecting Sea Levels, Miasia Osbey
News Items
No abstract provided.
Droughtscape- Fall 2017, National Drought Mitigation Center
Droughtscape- Fall 2017, National Drought Mitigation Center
Droughtscape, Quarterly Newsletter of NDMC, 2007-
CONTENTS
Drought worsens in northern Great Plains............. 2
Drought takes toll on ag, livestock................ 4
Study examines ag advisors’ views on climate change............... 5
New drought definition could lead to better preparation.............. 6
McCook takes big steps toward drought readiness.............8
Group hopes to map drought planning process for Korea............9
South African researcher working to forecast drought.................. 10
Cultivating drought preparedness in South Africa.............. 12
Shift In Icelandic Plant Populations Due To Climate Change: Through The Lens Of Natural Dyes, Molly Pluenneke
Shift In Icelandic Plant Populations Due To Climate Change: Through The Lens Of Natural Dyes, Molly Pluenneke
Independent Study Project (ISP) Collection
Northern residing plant species are at the highest risk for extinction due to temperature rise related to climate change (Schöb, Manuel, Choler & Veit, 2009). Climate change has also led to a northern shift in the geographic distribution of plant species (Parmesan & Yohe, 2003). This could lead to a necessary alteration in the way natural resources are utilized in arctic countries like Iceland (Lim-Camacho et al, 2017). The purpose of this study is to analyze the way in which Icelandic plant species used in natural dye practices may shift in distribution due to climate change and the potential impact …
The Effect Of Warming On Wind Speed And Potential Wind Power In Iceland, Alexei Smith
The Effect Of Warming On Wind Speed And Potential Wind Power In Iceland, Alexei Smith
Independent Study Project (ISP) Collection
Climate change is causing a shift in the temperature and pressure gradient between the Arctic and the Equator, with the Arctic warming at a faster rate than the Equator. This shift has the potential to alter the seasonal wind speeds in the Northern Hemisphere, which could in turn affect the wind power density potential. In this study, a wind model was created to predict future wind speeds and wind power density for 6 weather stations in Iceland. According to the model, winter wind speeds and wind power density potential will either stay the same or increase slightly (0 – 4%), …
Origins And Transformations Of Dissolved Organic Matter In Large Arctic Rivers, Karl Kaiser, Maria Canedo-Oropeza, Rachel Mcmahon, Eainer M. W. Amon
Origins And Transformations Of Dissolved Organic Matter In Large Arctic Rivers, Karl Kaiser, Maria Canedo-Oropeza, Rachel Mcmahon, Eainer M. W. Amon
OES Faculty Publications
Arctic river watersheds are important components of the global climate system and show an amplified response to climate change. Here, we characterize origins and transformations of dissolved organic matter (DOM) in five major Arctic rivers (Kolyma, Lena, Yenisei, Ob, Mackenzie) over 3 years with seasonal sampling periods using measurements of carbohydrates, amino acids, bacterial biomarkers (D-amino acids), and plant protein biomarkers (hydroxyproline). A strong seasonal cycle of bioavailable DOM export was observed that correlated with discharge, vegetation, river morphology and water residence time. The chemical composition of bioavailable DOM was different among rivers reflecting unique characteristics of Arctic river watersheds. …
A Picture Is Worth A Thousand Roads, Keith Pierce
Life In Hampton Roads: Sea Level Rise And Flooding, Public Affairs & News Bureau, Old Dominion University
Life In Hampton Roads: Sea Level Rise And Flooding, Public Affairs & News Bureau, Old Dominion University
News Items
No abstract provided.
Agricultural Responses To Climate Change: A Study Of Adaptive Farming Methods In Kizanda Village, Bailey Smith-Helman
Agricultural Responses To Climate Change: A Study Of Adaptive Farming Methods In Kizanda Village, Bailey Smith-Helman
Independent Study Project (ISP) Collection
Agriculture is vital to the economic and social systems in Tanzania, composing 30% of the country’s GDP as well as 80% of employment (FAO, 2014). Despite agriculture’s important role, it remains one of the most vulnerable sectors to climate change. Current trends project global average temperature to increase by 0.8-2.6 degrees Celsius, leaving farmers to face changes in rainfall, soil quality, and new pests and diseases (IPCC, 2007). Farmers will be forced to adapt to the changing climate if they are to sustain their livelihoods and the Tanzanian economy. For these reasons, it is important to understand the types of …