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2020

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I Already Belong: Immigrant-Origin College Students’ Persistence, Kerrie Devries, Wayne Harrison, Jonathan Santo Dec 2020

I Already Belong: Immigrant-Origin College Students’ Persistence, Kerrie Devries, Wayne Harrison, Jonathan Santo

Psychology Faculty Publications

Children of immigrant and refugee populations are increasing in the U.S. but are underrepresented at U.S. universities. Collectivistic, immigrant-origin students may be less responsive to current best practice integration approaches, which focus on institutional Academic and Social Integration as necessary for college persistence. Homoginizing U.S.-origin and immigrant-origin students in persistence strategies, particularly institutional Social Integration, may not take into consideration culture-of-origin differences, such as the degree of ongoing family connectedness, that motivate students toward college persistence. Antecedents of college intentions to persist were compared for immigrant-origin students (N=87) and U.S.- origin students (N=122) at a midwestern university. Model comparisons revealed …


Communicable Diseases As Occupational Hazards For Agricultural Workers: Using Experience Sampling Methods For Promoting Public Health, Mahima Saxena, Margaret M. Burke Dec 2020

Communicable Diseases As Occupational Hazards For Agricultural Workers: Using Experience Sampling Methods For Promoting Public Health, Mahima Saxena, Margaret M. Burke

Psychology Faculty Publications

Vector-borne communicable diseases cause more than 700,000 deaths annually (World Health Organization, 2019). Despite various efforts, there has been no change in mortality rates due to communicable diseases worldwide (World Health Organization, 2019). Most communicable diseases have no cure and can attain epidemic status quickly. Therefore, prevention is critical in reducing disease transmission. Communicable disease transmission as an occupational health hazard is often ignored in work psychology research and public health policy. Using experience sampling methods, Saxena (2015) found that work and nonwork behaviors associated with rice farming in South Asia increase exposure to Japanese encephalitis. …


Does Change In Binge Drinking Reduce Risk Of Repeat Sexual Assault Victimization? Evidence From Three Cohorts Of Freshman Undergraduate Women, Leah C. Butler, Bonnie S. Fisher, Bradford W. Reyns Dec 2020

Does Change In Binge Drinking Reduce Risk Of Repeat Sexual Assault Victimization? Evidence From Three Cohorts Of Freshman Undergraduate Women, Leah C. Butler, Bonnie S. Fisher, Bradford W. Reyns

Criminology and Criminal Justice Faculty Publications

Many college students who experience sexual assault experience subsequent (i.e., repeat) sexual assault incidents. There is also an established relationship between sexual assault and binge drinking. The “once bitten, twice shy” (OBTS) hypothesis suggests that those who experience alcohol- or drugrelated (AOD) sexual assault would reduce how frequently they binge drink in an effort to avoid repeat victimization. We test this hypothesis by analyzing two years of survey data collected from a panel of three cohorts of freshmen women. Supportive of OBTS, our analyses reveal that students who experienced an AOD-related sexual assault at time 1 only reduced the number …


Vocational And Life Skills Monthly Data Update: December 2020, Uno Nebraska Center For Justice Research, Katelynn Towne Dec 2020

Vocational And Life Skills Monthly Data Update: December 2020, Uno Nebraska Center For Justice Research, Katelynn Towne

Reports

Grantees use an online data management system to submit data on participants served under their Vocational and Life Skills programming. This data is due monthly and reflects all services provided during the previous month to participants. Evaluators at the Nebraska Center for Justice Research work with grantees directly to manage data entry errors on an ongoing basis during update calls and site visits.

The current data derives from an active database, from which data is being entered and updated daily. Data values, including previously submitted information, may fluctuate depending on the duration of lag between service delivery and data entry. …


Vocational And Life Skills Quarterly Report: Grant Cycle 4 Quarter 2 October-December 2020, Uno Nebraska Center For Justice Research, Katelynn Towne, Michael Campagna Dec 2020

Vocational And Life Skills Quarterly Report: Grant Cycle 4 Quarter 2 October-December 2020, Uno Nebraska Center For Justice Research, Katelynn Towne, Michael Campagna

Reports

This report presents quarterly data and evaluation updates for the Vocational and Life Skills Program (VLS) through Quarter Two of Grant Cycle Four. VLS was created by Nebraska Legislative Bill 907 in 2014 with the purpose of reducing recidivism and increasing meaningful employment for individuals convicted of a crime in Nebraska. The report contains 1) descriptions of the eight funded organizations across the state, 2) a snapshot of participation, 3) demographics of the participants, and 4) participation breakdowns and descriptions of the skills participants are gaining through VLS programming.

The VLS initiative is evaluated by the Nebraska Center for Justice …


Administrators As Math Leaders: Professional Learning Strategies Through Change, Kelly Gomez Johnson, Tamara Williams, Matthew Scott Dec 2020

Administrators As Math Leaders: Professional Learning Strategies Through Change, Kelly Gomez Johnson, Tamara Williams, Matthew Scott

Teacher Education Faculty Publications

No abstract provided.


Beyond The New Jim Crow: Public Support For Removing And Regulating Collateral Consequences, Alexander L. Burton, Velmer S. Burton Jr., Francis T. Cullen, Justin T. Pickett, Leah C. Butler, Angela J. Thielo Dec 2020

Beyond The New Jim Crow: Public Support For Removing And Regulating Collateral Consequences, Alexander L. Burton, Velmer S. Burton Jr., Francis T. Cullen, Justin T. Pickett, Leah C. Butler, Angela J. Thielo

Criminology and Criminal Justice Faculty Publications

In The New Jim Crow, Michelle Alexander drew national attention to the extensive imposition of collateral consequences on those convicted of a crime and to their racially disparate effects. Based on a 2017 national-level YouGov survey, supplemented by a second 2019 YouGov survey, the current study finds that the public is split on allowing ex-offenders to sit on juries, but supportive of removing barriers to voting and employment. The respondents also favored providing defendants with a list of restrictions linked to conviction as well as having lawmakers review and eliminate collateral consequences found to have no purpose and to …


Who Dreams Of Badges? Gendered Self-Concept And Policing Career Aspirations, Samantha S. Clinkinbeard, Starr J. Solomon, Rachael M. Rief Dec 2020

Who Dreams Of Badges? Gendered Self-Concept And Policing Career Aspirations, Samantha S. Clinkinbeard, Starr J. Solomon, Rachael M. Rief

Criminology and Criminal Justice Faculty Publications

NIJ’s Policing Research Plan (2017-2022) highlights the need to understand factors that attract diverse candidates. We explored whether college students had ever considered policing and found men were significantly more likely than women to contemplate policing careers. Further, we found higher levels of masculinity were associated with greater odds of policing aspirations; the relationship between gender and aspirations was fully mediated by masculine self-concept. Although men typically reported higher masculinity scores, within-gender analyses indicated that masculinity was important for both men and women. Our findings suggest the continued association of masculinity with policing may undercut efforts to recruit a representative …


Laboratory Versus Daily Life Gait Characteristics In Patients With Multiple Sclerosis, Parkinson’S Disease, And Matched Controls, Vrutangkumar V. Shah, James Mcnames, Martina Mancini, Patricia Carlson-Kuhta, Rebecca I. Spain, John G. Nutt, Mahmoud El-Gohary, Carolin Curtze, Fay B. Horak Dec 2020

Laboratory Versus Daily Life Gait Characteristics In Patients With Multiple Sclerosis, Parkinson’S Disease, And Matched Controls, Vrutangkumar V. Shah, James Mcnames, Martina Mancini, Patricia Carlson-Kuhta, Rebecca I. Spain, John G. Nutt, Mahmoud El-Gohary, Carolin Curtze, Fay B. Horak

Journal Articles

Background and purpose

Recent findings suggest that a gait assessment at a discrete moment in a clinic or laboratory setting may not reflect functional, everyday mobility. As a step towards better understanding gait during daily life in neurological populations, we compared gait measures that best discriminated people with multiple sclerosis (MS) and people with Parkinson’s Disease (PD) from their respective, age-matched, healthy control subjects (MS-Ctl, PD-Ctl) in laboratory tests versus a week of daily life monitoring.

Methods

We recruited 15 people with MS (age mean ± SD: 49 ± 10 years), 16 MS-Ctl (45 ± 11 years), 16 people with …


Politeness In Security Directives: Insights In Browser Compliance For The Human Element, Deanna House, Gabe Giordano Dec 2020

Politeness In Security Directives: Insights In Browser Compliance For The Human Element, Deanna House, Gabe Giordano

Information Systems and Quantitative Analysis Faculty Publications

The technical protection provided by information security technology is necessary as a frontline defense against threats. However, the human element adds great risk to systems and cannot be ignored. This research explores the human elements related to security communications and intention to comply with security directives. Security communications are more-commonly being sent using richer computer-based channels. While the goal of security communications is the gain compliance, there is still much to learn related to what influences a user to comply. This research explores the effects that (im)politeness has on intention to comply with security directives. The research utilized an experiment …


University Of Nebraska At Omaha Commencement: December 2020, University Of Nebraska At Omaha Dec 2020

University Of Nebraska At Omaha Commencement: December 2020, University Of Nebraska At Omaha

Commencement Programs

No abstract provided.


An Analysis Of Wildlife Strikes To Aircraft In Brazil: 2011-2018, Flavio A. C. Mendonca, Julius Keller, Chenyu Huang Dec 2020

An Analysis Of Wildlife Strikes To Aircraft In Brazil: 2011-2018, Flavio A. C. Mendonca, Julius Keller, Chenyu Huang

Aviation Institute Faculty Publications

Purpose: Aircraft accidents due to wildlife hazards have become a growing safety and economic problem to the Brazilian and international aviation industries. These safety occurrences have resulted in significant direct and indirect economic losses as well injuries and fatalities worldwide. The purpose of this study was to develop empirical information obtained from the analysis of wildlife strike and aircraft operations data in Brazil that could be used for accident prevention efforts.

Design/methodology: The research team collected and analyzed aircraft operations as well as wildlife strike data from the 32 busiest commercial airports in Brazil, from 2011 through 2018. …


How Perpetrator Identity (Sometimes) Influences Media Framing Attacks As “Terrorism” Or “Mental Illness”, Allison E. Betus, Erin M. Kearns, Anthony F. Lemieux Nov 2020

How Perpetrator Identity (Sometimes) Influences Media Framing Attacks As “Terrorism” Or “Mental Illness”, Allison E. Betus, Erin M. Kearns, Anthony F. Lemieux

Criminology and Criminal Justice Faculty Publications

Do media frame attacks with Muslim perpetrators as “terrorism” and attacks with White perpetrators as the result of “mental illness”? Despite public speculation and limited academic work with relatively small subsets of cases, there have been no systematic analyses of potential biases in how media frame terrorism. We addressed this gap by examining the text of print news coverage of all terrorist attacks in the United States between 2006 and 2015. Controlling for fatalities, affiliation with a group, and existing mental illness, the odds that an article references terrorism are approximately five times greater for a Muslim versus a non-Muslim …


Staffing And Workflow For Institutional Repositories, Stephen Craig Finlay Nov 2020

Staffing And Workflow For Institutional Repositories, Stephen Craig Finlay

Criss Library Faculty Publications

As we enter the 2020s Open Access Institutional Repositories have graduated from being “well established components of many academic libraries,” as Madsen and Oleen wrote in 2013, to being standard among universities. The Directory of Open Access Repositories lists over 5,200 IRs, all types, as of December 2019, while the Registry of Open Access Repositories lists over 4,100. The growth in repositories is sufficient that a conversation has started about whether the preponderance of IRs has the potential for confusion and diminishing returns (Arlitsch & Grant, 2018). For those universities and colleges who have not yet developed an IR, or …


Bullying And Cyberbullying Experiences Among Children In Brazil Experiências De Bullying E Cyberbullying Entre Crianças No Brasil), Josafa M. Da Cunha, Marielly Rodrigues Mandira, Jonathan Santo Nov 2020

Bullying And Cyberbullying Experiences Among Children In Brazil Experiências De Bullying E Cyberbullying Entre Crianças No Brasil), Josafa M. Da Cunha, Marielly Rodrigues Mandira, Jonathan Santo

Psychology Faculty Publications

The expansion of Internet access offers new possibilities for human development through rapid access to information, knowledge, culture, entertainment, routine processes, and the possibility of establishing new forms of interaction with people who are many meters or thousands of kilometers away. Survey data on Internet use by children in Brazil reveals that, in 2018, 86% of Brazilian children 9 to 17 years old were Internet users (Brazilian Internet Steering Committee [CGI.br], 2019). As the Internet offers space with particular rules of interaction, it provides new ways to express behavior, contributing to human development.


Alcohol Abuse Rising Like Covid, Christine Chasek Nov 2020

Alcohol Abuse Rising Like Covid, Christine Chasek

Counseling Faculty Publications

Alcohol use is a common coping response to stress. Historically, it has increased during times of catastrophic events. The COVID-10 pandemic can be placed in both of those categories.


Mitigating Versus Managing Epistemic And Aleatory Uncertainty, Mark D. Packard, Brent B. Clark Nov 2020

Mitigating Versus Managing Epistemic And Aleatory Uncertainty, Mark D. Packard, Brent B. Clark

Marketing and Management Faculty Publications

We are grateful for Holmes and Westgren’s (2020) thoughtful response to our recent article (Packard & 872 Academy of Management Review October Clark, 2020a). In it, they argued that “a mitigability– immitigability axis does not map well onto the aleatory–epistemic uncertainty axis” (p. 7). This challenge to our delineation casts doubt to its usefulness in strategic theorizing, as we have supposed. They thus proposed a revision to our definitions that encapsulates epistemic uncertainty within the confines of the present state of knowledge and the costs of acquiring such knowledge, allowing strategic analysis of the value of mitigation efforts to be …


On Mitigability Of Uncertainty And The Choice Between Predictive And Nonpredictive Strategy, Mark D. Packard, Brent B. Clark Nov 2020

On Mitigability Of Uncertainty And The Choice Between Predictive And Nonpredictive Strategy, Mark D. Packard, Brent B. Clark

Marketing and Management Faculty Publications

Managers face a critical issue in deciding when to employ a predictive planning approach versus a more adaptive and flexible strategic approach.We suggest that determiningwhich approach is ideal for a given context hangs on the extent to which uncertainty is, or might be, mitigable within that context. To date, however, the mitigability of uncertainty has not been adequately distilled. Here, we take on this issue, distinguishing mitigable ignorance of pertinent but knowable information (i.e., “epistemic uncertainty”) from immitigable indeterminacy (i.e., “aleatory uncertainty”). We review the current state of the debate on the existence of free will, because the acceptance or …


Social Interaction In The Spanish Classroom: How Proficiency And Linguistic Background Impact Vocabulary Learning, C. Cecilia Tocaimaza-Hatch, Jonathan Santo Nov 2020

Social Interaction In The Spanish Classroom: How Proficiency And Linguistic Background Impact Vocabulary Learning, C. Cecilia Tocaimaza-Hatch, Jonathan Santo

Psychology Faculty Publications

Spanish learners engaged in two-way interaction gap tasks where, through social interaction, they identified and defined low-frequency vocabulary. Participants (referred to as actors to differentiate them from task partners) completed two such tasks. Each time, they collaborated with different partners of varying degrees of Spanish proficiency and linguistic background, either an L2 learner or a heritage speaker (HS). The purpose of the study was thus to shed light on if and how features of the collaborating partners in mixed (HS–L2) and matched (L2–L2; HS–HS) partnerships impacted vocabulary learning. Through a mixed methods analysis of the data (perception measures and qualitative …


Change Matters: Binge Drinking And Drugging Victimization Over Time In Three College Freshman Cohorts, Leah C. Butler, Bonnie S. Fisher, Rachael Schilling, Nicole V. Lasky, Suzanne C. Swan Nov 2020

Change Matters: Binge Drinking And Drugging Victimization Over Time In Three College Freshman Cohorts, Leah C. Butler, Bonnie S. Fisher, Rachael Schilling, Nicole V. Lasky, Suzanne C. Swan

Criminology and Criminal Justice Faculty Publications

The “once bitten, twice shy” (OBTS) hypothesis argues that crime victims who change their involvement in risky lifestyle behaviors reduce their likelihood of experiencing repeat victimization. Tests of this hypothesis have yielded weak to mixed results, which may be due to methodological issues. We address these methodological issues by testing the OBTS hypothesis for repeat drugging victimization with survey data from a panel of three freshman cohorts at three large, public universities. Supportive of the OBTS hypothesis, the multivariate results show that, on average, those not drugged at Time 1 or Time 2 and those drugged at Time 1 and …


Psychological Pathways Linking Public Trust During The Coronavirus Pandemic To Mental And Physical Well-Being, Ayokunle Olagoke, Olakanmi Olagoke, Ashley M. Hughes Nov 2020

Psychological Pathways Linking Public Trust During The Coronavirus Pandemic To Mental And Physical Well-Being, Ayokunle Olagoke, Olakanmi Olagoke, Ashley M. Hughes

Health and Kinesiology Faculty Publications

The well-being of the public during the 2019 coronavirus (COVID-19) pandemic is deeply rooted in institutional trust in the government’s risk communication effort. The objective of this study was to examine the psychological pathway through which public trust in the government is associated with mental and physical well-being. We collected cross-sectional data from 501 participants aged ≥18 years using an online panel. Public trust in the government was assessed as our exposure variable. We screened for psychological distress by combining the Patient Health Questionnaire and the General Anxiety Disorder scale. Physical well-being was examined using self-rated health. We further assessed …


The Librarian’S Guide To Zines For Classroom And Community, Claire Du Laney, Monica Maher, Amy Schindler Nov 2020

The Librarian’S Guide To Zines For Classroom And Community, Claire Du Laney, Monica Maher, Amy Schindler

Criss Library Faculty Proceedings & Presentations

Zines continue to benefit from a resurgent interest from their 1990s heyday, including in libraries. A zine can serve as a pedagogical tool and are a low-cost addition to collections and programming in libraries. Over the course of the last three semesters, UNO librarians have collaborated with faculty on zine creation as a creative alternative to a typical research paper project for a course. Creating zines as assignments presents students with the opportunity to demonstrate research skills, exercise creativity, express compassion and empathy, and other outcomes. These outcomes have been illustrated by the classes that have created zines and presented …


Vocational And Life Skills Monthly Data Update: November 2020, Uno Nebraska Center For Justice Research, Katelynn Towne Nov 2020

Vocational And Life Skills Monthly Data Update: November 2020, Uno Nebraska Center For Justice Research, Katelynn Towne

Reports

Grantees use an online data management system to submit data on participants served under their Vocational and Life Skills programming. This data is due monthly and reflects all services provided during the previous month to participants. Evaluators at the Nebraska Center for Justice Research work with grantees directly to manage data entry errors on an ongoing basis during update calls and site visits.

The current data derives from an active database, from which data is being entered and updated daily. Data values, including previously submitted information, may fluctuate depending on the duration of lag between service delivery and data entry. …


Family’S Health: Opportunities For Non-Collocated Intergenerational Families Collaboration On Healthy Living, Jomara Sandbulte, Chun-Hua Tsai, John Millar Carroll Nov 2020

Family’S Health: Opportunities For Non-Collocated Intergenerational Families Collaboration On Healthy Living, Jomara Sandbulte, Chun-Hua Tsai, John Millar Carroll

Information Systems and Quantitative Analysis Faculty Publications

When a family is engaged in healthy living practices together, it enhances the quality of life for all individuals. However, when members in families are separated over distance, the everyday encouragement and support may shift and obstacles arise within the family. In this study, we investigate non-collocated family members’ practices of healthy living, their perspectives on their family’s healthy living activities, and what obstacles exist regarding collaboration on their family health. We conducted an interview study with 26 independently living participants representing “elderly parents” and “adult children” in a family dynamic. We present members’ practices and strategies for sustainable healthy …


Intention To Vaccinate Against The Novel 2019 Coronavirus Disease: The Role Of Health Locus Of Control And Religiosity, Ayokunle Olagoke, Olakanmi Olagoke, Ashley M. Hughes Oct 2020

Intention To Vaccinate Against The Novel 2019 Coronavirus Disease: The Role Of Health Locus Of Control And Religiosity, Ayokunle Olagoke, Olakanmi Olagoke, Ashley M. Hughes

Health and Kinesiology Faculty Publications

The urgency to develop a vaccine against the 2019 coronavirus (COVID-19) has waxed stronger in speed, scale, and scope. However, wisdom dictates that we take a vantage position and start to examine the demographic predictors of COVID-19 vaccine hesitancy. The objective of this study was to examine the role of health locus of control (HLOC) in the relationship between religiosity and COVID-19 vaccination intention. In a cross-sectional survey (N = 501), we found a significantly negative association between religiosity and COVID-19 vaccination intention. This relationship was partially mediated by external HLOC. Collaborative efforts with religious institutions may influence COVID-19 vaccine …


Comparable Human Reconstitution Following Cesium-137 Versus X-Ray Irradiation Preconditioning In Immunodeficient Nog Mice, Anna Halling Folkmar Andersen, Stine Sofie Frank Nielsen, Rikka Olesen, Jakob Le Fèvre Harslund, Ole S. Søgaard, Lars Østergaard, Paul Denton, Martin Tolstrup Oct 2020

Comparable Human Reconstitution Following Cesium-137 Versus X-Ray Irradiation Preconditioning In Immunodeficient Nog Mice, Anna Halling Folkmar Andersen, Stine Sofie Frank Nielsen, Rikka Olesen, Jakob Le Fèvre Harslund, Ole S. Søgaard, Lars Østergaard, Paul Denton, Martin Tolstrup

Biology Faculty Publications

Humanized mouse models are used extensively in research involving human pathogens and diseases. However, most of these models require preconditioning. Radio-active sources have been used routinely for this purpose but safety issues have motivated researchers to transition to chemical or X-ray based preconditioning. In this study, we directly compare 350 kV X-ray and Cs-137 low-dose precondition of NOG mice before human stem cell transplantation. Based on flow cytometry data, we found that engraftment of human cells into the mouse bone marrow was similar between radiation sources. Likewise, human engraftment in the peripheral blood was comparable between Cs-137 and three different …


Differences Between Joint-Space And Musculoskeletal Estimations Of Metabolic Rate Time Profiles, Arash Mohammadzadeh Gonabadi, Prokopios Antonellis, Philippe Malcolm Oct 2020

Differences Between Joint-Space And Musculoskeletal Estimations Of Metabolic Rate Time Profiles, Arash Mohammadzadeh Gonabadi, Prokopios Antonellis, Philippe Malcolm

Journal Articles

Motion capture laboratories can measure multiple variables at high frame rates, but we can only measure the average metabolic rate of a stride using respiratory measurements. Biomechanical simulations with equations for calculating metabolic rate can estimate the time profile of metabolic rate within the stride cycle. A variety of methods and metabolic equations have been proposed, including metabolic time profile estimations based on joint parameters. It is unclear whether differences in estimations are due to differences in experimental data or due to methodological differences. This study aimed to compare two methods for estimating the time profile of metabolic rate, within …


Usability And Feasibility Of Data-Based Instruction For Students With Intensive Writing Needs, Apryl L. Poch, Kristen L. Mcmaster, Erica S. Lembke Oct 2020

Usability And Feasibility Of Data-Based Instruction For Students With Intensive Writing Needs, Apryl L. Poch, Kristen L. Mcmaster, Erica S. Lembke

Special Education and Communication Disorders Faculty Publications

A small proportion of students do not benefit sufficiently from standard intervention protocols and require more intensive, individualized instruction. Data-based instruction (DBI) has a strong evidence base for addressing students’ intensive academic needs, yet it is not widely implemented. In this study, we explored the usability and feasibility of a professional development system to support teachers’ use of DBI in writing. Data analyzed using a mixed-methods design revealed that teachers perceived supports such as coaching as facilitators of DBI implementation, whereas access to materials and external factors such as time conflicts presented challenges. Teachers made statistically significant growth from pretest …


A Randomized Controlled Trial Of The Impact Of Body-Worn Camera Activation On The Outcomes Of Individual Incidents, Jessica Huff, Charles M. Katz, E. C. Hedberg Oct 2020

A Randomized Controlled Trial Of The Impact Of Body-Worn Camera Activation On The Outcomes Of Individual Incidents, Jessica Huff, Charles M. Katz, E. C. Hedberg

Criminology and Criminal Justice Faculty Publications

Objectives

Evaluate the impact of body-worn cameras (BWCs) on officer-initiated activity, arrests, use of force, and complaints.

Methods

We use instrumental variable analysis to examine the impact of BWC assignment and BWC activation on the outcomes of individual incidents through a randomized controlled trial of 436 officers in the Phoenix Police Department.

Results

Incidents involving BWC activations were associated with a lower likelihood of officer-initiated contacts and complaints, but a greater likelihood of arrests and use of force. BWC assignment alone was unrelated to arrests or complaints; however, incidents involving officers who were assigned and activated their BWC were significantly …


Impact Of Glacial Retreat And Weathering On North Atlantic Nd Isotopes, Emily N. An, Ellen E. Martin, Kelly M. Deuerling, Jonathan B. Martin Oct 2020

Impact Of Glacial Retreat And Weathering On North Atlantic Nd Isotopes, Emily N. An, Ellen E. Martin, Kelly M. Deuerling, Jonathan B. Martin

Geography and Geology Faculty Proceedings & Presentations

Interpretation of Nd isotopes (143Nd/144Nd, represented as εNd) as a geochemical tracer for ocean circulation in the North Atlantic requires knowledge of endmember compositions of potential source waters. During early interglacials, glacial terminations, and Dansgaard-Oeschger cycles (rapid warming events), seawater εNd values derived from marine archives in the NW Atlantic are less radiogenic than modern North Atlantic Deep Water (NADW), indicating a change in circulation or in the isotopic value of northern sourced deep water during intervals of warming and ice sheet retreat. Given that few water masses have εNd values lower than modern NADW, it …