Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements

This study examines the seasonal evolution of Cape Darnley Bottom Water (CDBW), using the results of mooring and hydrographic measurements in the slope region off Cape Darnley in 2008–2009 and 2013–2014. Newly formed CDBW began reaching the western and nearshore part of the slope region off Cape Darnley in April, spread to the offshore and eastern part in May, and reached the easternmost part in September. The potential temperature and salinity decreased and the neutral density increased when newly formed CDBW reached mooring sites. Potential temperature-salinity properties of CDBW changed over time and location. The salinity of the source water of CDBW estimated from potential temperature-salinity diagrams started to increase at a nearshore mooring in late April, which is about 2 months after the onset of sea-ice production, and continued to increase during the ice production season. It is most probable that the accumulation of brine in the Cape Darnley polynya produces the seasonal variation of potential temperature-salinity properties of CDBW. Two types of CDBW were identified. Cold and less saline CDBW and warm and saline CDBW were present in Wild and Daly Canyons, respectively. This indicates that the salinity of the source water of CDBW increased in the westward direction. CDBW exhibited short-term variability induced by baroclinic instability.

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Do Feelings of Defeat and Entrapment Change over Time? An Investigation of the Integrated Motivational—Volitional Model of Suicidal Behaviour Using Ecological Momentary Assessments

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17134685 ◽

2020 ◽

Vol 17 (13) ◽

pp. 4685

Author(s):

Jana-Sophie Stenzel ◽

Inken Höller ◽

Dajana Rath ◽

Nina Hallensleben ◽

Lena Spangenberg ◽

...

Keyword(s):

Risk Factors ◽

Suicidal Ideation ◽

Real Time ◽

Clinical Samples ◽

Short Term ◽

Change Over Time ◽

Longitudinal Association ◽

Ecological Momentary ◽

Over Time ◽

Short Term Variability

(1) Background. Defeat and entrapment have been highlighted as major risk factors of suicidal ideation and behavior. Nevertheless, little is known about their short-term variability and their longitudinal association in real-time. Therefore, this study aims to investigate whether defeat and entrapment change over time and whether defeat predicts entrapment as stated by the integrated motivational–volitional model of suicidal behavior. (2) Methods. Healthy participants (n = 61) underwent a 7-day smartphone-based ecological momentary assessment (EMA) on suicidal ideation/behavior and relevant risk factors, including defeat and entrapment and a comprehensive baseline (T0) and post (T2) assessment. (3) Results. Mean squared successive differences (MSSD) and intraclass correlations (ICC) support the temporal instability as well as within-person variability of defeat and entrapment. Multilevel analyses revealed that during EMA, defeat was positively associated with entrapment at the same measurement. However, defeat could not predict entrapment to the next measurement (approximately two hours later). (4) Conclusion. This study provides evidence on the short-term variability of defeat and entrapment highlighting that repeated measurement of defeat and entrapment—preferably in real time—is necessary in order to adequately capture the actual empirical relations of these variables and not to overlook significant within-person variability. Further research—especially within clinical samples—seems warranted.

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On the short-term variability of turbulence and temperature in the winter mesosphere

10.5194/angeo-2018-30 ◽

2018 ◽

Author(s):

Gerald A. Lehmacher ◽

Miguel F. Larsen ◽

Richard L. Collins ◽

Aroh Barjatya ◽

Boris Strelnikov

Keyword(s):

High Precision ◽

Attitude Control ◽

Lower Thermosphere ◽

Density Fluctuations ◽

Sounding Rocket ◽

Neutral Density ◽

Spin Motion ◽

Short Term ◽

Short Term Variability

Abstract. Four mesosphere-lower thermosphere temperature and turbulence profiles were obtained in situ within ~ 30 minutes and over an area of about 100 by 100 kilometers during a sounding rocket experiment conducted on January 26, 2015 at Poker Flat Research Range in Alaska. Using active payload attitude control, neutral density fluctuations, a tracer for turbulence, were observed with very little interference from the payload spin motion, and with high precision (

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Comparison of Short-Term and Long-Term Variability in Nasalance Scores

The Cleft Palate-Craniofacial Journal ◽

10.1597/07-150.1 ◽

2008 ◽

Vol 45 (5) ◽

pp. 495-500 ◽

Cited By ~ 11

Author(s):

Kerry E. Lewis ◽

Thomas Watterson ◽

Ann Blanton

Keyword(s):

Outcome Measures ◽

Short Term ◽

Long Term Conditions ◽

Difference Scores ◽

Term Variation ◽

Subject Performance ◽

Normal Speech ◽

Over Time ◽

Short Term Variability

Objective: To evaluate long-term nasalance score variability while accounting for short-term variation associated with subject performance and headgear change variability. Stimuli: Turtle and Mouse Passages. Design: Short-term immediate test-retest nasalance score variability was assessed with no headgear change (NCHG) and with change of headgear (CHG). Long-term variability was assessed with scores obtained in the morning and afternoon of the same day, 1 day apart, and 1 week apart. Scores from the long-term conditions necessarily reflect variability associated with headgear change plus variability, which may be attributed to time. Participants: Twenty-six adults (19 to 70 years of age) with normal speech and resonance. Main Outcome Measures: Forty-six nasalance scores per subject. Results: Mean nasalance difference scores across conditions were compared. Three contrasts were significantly different, each involving comparison of nasalance difference scores in the NCHG condition to difference scores from a CHG condition. Overall, long-term variability was slightly greater than short-term variability. For the Turtle Passage, in the short-term CHG condition, 92% of repeated scores were within five points. In the long-term conditions, 83% to 89% of scores were within five points. For the Mouse Passage, 88% of repeated scores in the CHG condition were within five points. In the long-term conditions, 81% to 83% of scores were within five points. Conclusions: Nasalance scores obtained over time showed slightly greater variability than scores obtained in immediate test-retest conditions; however, variability did not increase as the length of time between measures increased.

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The Short-Term and Long-Term Impacts of Sarbanes-Oxley Act on Composition and Characteristics of Corporate Board of Directors

International Journal of Financial Management ◽

10.21863/ijfm/2015.5.4.019 ◽

2015 ◽

Vol 5 (4) ◽

Author(s):

Halil Kaya ◽

Gaurango Banerjee

Keyword(s):

Board Composition ◽

Corporate Boards ◽

Corporate Accountability ◽

Corporate Board ◽

Short Term ◽

Dual Roles ◽

Board Characteristics ◽

Sarbanes Oxley ◽

Over Time

The paper examines the Sarbanes-Oxley (2002) Acts immediate impact on board composition and characteristics as well as possible reversals in its impact over time. Effects on directors age and tenure are analyzed over the 2001-06 sample period. Female participation in corporate boards is also studied in the pre-SOX and post-SOX periods. The dual roles of directors in being a member of the board as well as serving as either CEO, CFO, Chairman, Co-Chair, Founder, or Lead Director of their respective companies is also examined. We observe a short-term impact of SOX on board compositions due to changes seen in board characteristics between 2001 (pre-SOX), and 2003-05 short-term period (post-SOX). Also, we observe a reversal of board characteristics in 2006 to pre-SOX levels implying that the effects of SOX on board composition were short-lived, and needs to be monitored over time to ensure adherence to corporate accountability guidelines over the long-term.

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Rotating Shallow-Water Models with Moist Convection

10.1093/oso/9780198804338.003.0015 ◽

2018 ◽

Author(s):

Vladimir Zeitlin

Keyword(s):

Baroclinic Instability ◽

Potential Temperature ◽

Moist Convection ◽

Mathematical Properties ◽

Vertical Fluxes ◽

Equivalent Potential ◽

Shallow Water Models ◽

Wave Emission ◽

Rotating Shallow Water ◽

Convective Fluxes

It is shown how the standard RSW can be ’augmented’ to include phase transitions of water. This chapter explains how to incorporate extra (convective) vertical fluxes in the model. By using Lagrangian conservation of equivalent potential temperature condensation of the water vapour, which is otherwise a passive tracer, is included in the model and linked to convective fluxes. Simple relaxational parameterisation of condensation permits the closure of the system, and surface evaporation can be easily included. Physical and mathematical properties of thus obtained model are explained, and illustrated on the example of wave scattering on the moisture front. The model is applied to ’moist’ baroclinic instability of jets and vortices. Condensation is shown to produce a transient increase of the growth rate. Special attention is paid to the moist instabilities of hurricane-like vortices, which are shown to enhance intensification of the hurricane, increase gravity wave emission, and generate convection-coupled waves.

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Personality dynamics at work: The effects of form, time, and context of variability

European Journal of Personality ◽

10.1177/08902070211017341 ◽

2021 ◽

pp. 089020702110173

Author(s):

Nadin Beckmann ◽

Damian P Birney ◽

Amirali Minbashian ◽

Jens F Beckmann

Keyword(s):

Individual Differences ◽

Cognitive Ability ◽

Temporal Stability ◽

Limited Evidence ◽

Short Term ◽

State Data ◽

The Status ◽

Over Time ◽

Trait Variability

The study aimed to investigate the status of within-person state variability in neuroticism and conscientiousness as individual differences constructs by exploring their (a) temporal stability, (b) cross-context consistency, (c) empirical links to selected antecedents, and (d) empirical links to longer term trait variability. Employing a sample of professionals ( N = 346) from Australian organisations, personality state data together with situation appraisals were collected using experience sampling methodology in field and repeatedly in lab-like settings. Data on personality traits, cognitive ability, and motivational mindsets were collected at baseline and after two years. Contingent (situation contingencies) and non-contingent (relative SD) state variability indices were relatively stable over time and across contexts. Only a small number of predictive effects of state variability were observed, and these differed across contexts. Cognitive ability appeared to be associated with state variability under lab-like conditions. There was limited evidence of links between short-term state and long-term trait variability, except for a small effect for neuroticism. Some evidence of positive manifold was found for non-contingent variability. Systematic efforts are required to further elucidate the complex pattern of results regarding the antecedents, correlates and outcomes of individual differences in state variability.

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Leaching Rate of Polychlorinated Biphenyls (PCBs) from Marine Paint Chips

Archives of Environmental Contamination and Toxicology ◽

10.1007/s00244-021-00868-6 ◽

2021 ◽

Author(s):

Allen D. Uhler ◽

Jeffery H. Hardenstine ◽

Deborah A. Edwards ◽

Guilherme R. Lotufo

Keyword(s):

Polychlorinated Biphenyls ◽

Surface Waters ◽

Leaching Rate ◽

Short Term ◽

Aroclor 1254 ◽

Maintenance And Repair ◽

Potential Source ◽

Vessel Bottom ◽

Dissolved Phase ◽

Over Time

AbstractPolychlorinated biphenyls (PCBs) were added to certain marine vessel bottom paints as a plasticizer to improve the adhesion and durability of the paint. The most common PCB formulation used to amend such paints was Aroclor 1254. Fugitive Aroclor-containing paint chips generated from vessel maintenance and repair operations represent a potential source of PCB contamination to sediments. Limited published studies indicate that Aroclor-containing paint is largely inert and exhibits low PCB leaching into water; however, the rate and degree of leaching of PCBs from paint chips have not been directly studied. This laboratory-based study evaluated the rate and extent of leaching of PCBs from paint chips into freshwater. The results of this investigation demonstrate that the rate of PCB dissolution from paint chips decreased rapidly and exponentially over time. Based on this study, it is estimated that the rate of leaching of PCBs from paint chips would cease after approximately 3 years of exposure to water. When all leachable PCBs were exhausted, it is estimated that less than 1% of the mass of PCBs in the paint chips was amenable to dissolution. The results of this experiment suggest that Aroclor-containing paint chips found in sediments are likely short-term sources of dissolved-phase PCB to pore or surface waters and that the majority of the PCBs in paint chips remain in the paint matrix and unavailable for partitioning into water. Graphic Abstract

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