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21st-century modeled permafrost carbon emissions accelerated by abrupt thaw beneath lakes.

https://arctichealth.org/en/permalink/ahliterature297387
Source
Nat Commun. 2018 08 15; 9(1):3262
Publication Type
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Date
08-15-2018
Author
Katey Walter Anthony
Thomas Schneider von Deimling
Ingmar Nitze
Steve Frolking
Abraham Emond
Ronald Daanen
Peter Anthony
Prajna Lindgren
Benjamin Jones
Guido Grosse
Author Affiliation
Water and Environmental Research Center, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA. kmwalteranthony@alaska.edu.
Source
Nat Commun. 2018 08 15; 9(1):3262
Date
08-15-2018
Language
English
Publication Type
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Keywords
Alaska
Carbon - chemistry
Carbon Cycle
Carbon Dioxide - chemistry
Conservation of Natural Resources - methods - trends
Freezing
Geography
Geologic Sediments - chemistry
Global warming
Lakes - chemistry
Methane - chemistry
Models, Theoretical
Permafrost - chemistry
Soil - chemistry
Abstract
Permafrost carbon feedback (PCF) modeling has focused on gradual thaw of near-surface permafrost leading to enhanced carbon dioxide and methane emissions that accelerate global climate warming. These state-of-the-art land models have yet to incorporate deeper, abrupt thaw in the PCF. Here we use model data, supported by field observations, radiocarbon dating, and remote sensing, to show that methane and carbon dioxide emissions from abrupt thaw beneath thermokarst lakes will more than double radiative forcing from circumpolar permafrost-soil carbon fluxes this century. Abrupt thaw lake emissions are similar under moderate and high representative concentration pathways (RCP4.5 and RCP8.5), but their relative contribution to the PCF is much larger under the moderate warming scenario. Abrupt thaw accelerates mobilization of deeply frozen, ancient carbon, increasing 14C-depleted permafrost soil carbon emissions by ~125-190% compared to gradual thaw alone. These findings demonstrate the need to incorporate abrupt thaw processes in earth system models for more comprehensive projection of the PCF this century.
PubMed ID
30111815 View in PubMed
Less detail

30-year trends in asthma and the trends in relation to hospitalization and mortality.

https://arctichealth.org/en/permalink/ahliterature297877
Source
Respir Med. 2018 09; 142:29-35
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
09-2018
Author
Margit K Pelkonen
Irma-Leena K Notkola
Tiina K Laatikainen
Pekka Jousilahti
Author Affiliation
Division of Respiratory Medicine, Center for Medicine and Clinical Research, Kuopio University Hospital, Kuopio, Finland. Electronic address: Margit.Pelkonen@kuh.fi.
Source
Respir Med. 2018 09; 142:29-35
Date
09-2018
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Adult
Age Factors
Asthma - epidemiology - mortality
Cause of Death - trends
Cross-Sectional Studies
Female
Finland - epidemiology
Hospitalization - statistics & numerical data - trends
Humans
Length of Stay - statistics & numerical data - trends
Male
Middle Aged
Prevalence
Risk factors
Smoking
Surveys and Questionnaires
Time Factors
Abstract
The present study examines how trends in the prevalence of asthma during the past three decades associate with hospitalization and mortality during the same period.
Altogether 54?320 subjects aged 25-74 years were examined in seven independent cross-sectional population surveys repeated every five years between 1982 and 2012 in Finland. The study protocol included a standardized questionnaire on self-reported asthma, smoking habits and other risk factors, and clinical measurements at the study site. Data on hospitalizations were obtained from the Care Register for Health Care, and data on mortality from the National Causes of Death register.
During the study, the prevalence of asthma increased - especially in women. In asthmatic compared with non-asthmatic subjects, hospitalization was significantly higher for all causes, respiratory causes, cardiovascular causes and lung cancer. In addition, particularly in asthmatic subjects, mean yearly hospital days in the 5-year periods after each survey diminished. In asthmatic subjects, the decrease in yearly all-cause hospital days was from 4.45 (between 1982 and 1987) to 1.11 (between 2012 and 2015) and in subjects without asthma the corresponding decrease was from 1.77 to 0.60 (p?
PubMed ID
30170798 View in PubMed
Less detail

The 2015 National Canadian Homeless Youth Survey: Mental Health and Addiction Findings.

https://arctichealth.org/en/permalink/ahliterature291013
Source
Can J Psychiatry. 2017 07; 62(7):493-500
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
07-2017
Author
Sean A Kidd
Stephen Gaetz
Bill O'Grady
Author Affiliation
1 Centre for Addiction and Mental Health, Department of Psychiatry, University of Toronto, Toronto, Ontario.
Source
Can J Psychiatry. 2017 07; 62(7):493-500
Date
07-2017
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Adolescent
Adult
Canada - epidemiology
Female
Homeless Youth - statistics & numerical data
Humans
Male
Mental Health - statistics & numerical data
Sex Factors
Sexual and Gender Minorities - statistics & numerical data
Stress, Psychological - epidemiology
Substance-Related Disorders - epidemiology
Suicide, Attempted - statistics & numerical data
Young Adult
Abstract
This study was designed to provide a representative description of the mental health of youth accessing homelessness services in Canada. It is the most extensive survey in this area to date and is intended to inform the development of mental health and addiction service and policy for this marginalized population.
This study reports mental health-related data from the 2015 "Leaving Home" national youth homelessness survey, which was administered through 57 agencies serving homeless youth in 42 communities across the country. This self-reported, point-in-time survey assessed a broad range of demographic information, pre-homelessness and homelessness variables, and mental health indicators.
Survey data were obtained from 1103 youth accessing Canadian homelessness services in the Nunavut territory and all Canadian provinces except for Prince Edward Island. Forty-two per cent of participants reported 1 or more suicide attempts, 85.4% fell in a high range of psychological distress, and key indicators of risk included an earlier age of the first episode of homelessness, female gender, and identifying as a sexual and/or gender minority (lesbian, gay, bisexual, transgender, queer, and 2 spirit [LGBTQ2S]).
This study provides clear and compelling evidence of a need for mental health support for these youth, particularly LGBTQ2S youth and female youth. The mental health concerns observed here, however, must be considered in the light of the tremendous adversity in all social determinants faced by these youth, with population-level interventions best leveraged in prevention and rapid response.
Notes
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PubMed ID
28372467 View in PubMed
Less detail

Abdominal Aortic Calcifications Predict Survival in Peritoneal Dialysis Patients.

https://arctichealth.org/en/permalink/ahliterature298110
Source
Perit Dial Int. 2018 Sep-Oct; 38(5):366-373
Publication Type
Journal Article
Multicenter Study
Observational Study
Research Support, Non-U.S. Gov't
Author
Satu Mäkelä
Markku Asola
Henrik Hadimeri
James Heaf
Maija Heiro
Leena Kauppila
Susanne Ljungman
Mai Ots-Rosenberg
Johan V Povlsen
Björn Rogland
Petra Roessel
Jana Uhlinova
Maarit Vainiotalo
Maria K Svensson
Heini Huhtala
Heikki Saha
Author Affiliation
Tampere University Hospital, Tampere, Finland satu.m.makela@pshp.fi.
Source
Perit Dial Int. 2018 Sep-Oct; 38(5):366-373
Language
English
Publication Type
Journal Article
Multicenter Study
Observational Study
Research Support, Non-U.S. Gov't
Keywords
Ankle Brachial Index
Aorta, Abdominal - diagnostic imaging
Aortic Diseases - diagnosis - epidemiology - etiology
Cause of Death - trends
Critical Illness - mortality - therapy
Denmark - epidemiology
Estonia - epidemiology
Female
Finland - epidemiology
Humans
Incidence
Male
Middle Aged
Peritoneal Dialysis - adverse effects - mortality
Prognosis
Prospective Studies
Renal Dialysis
Risk factors
Survival Rate - trends
Sweden - epidemiology
Ultrasonography, Doppler
Vascular Calcification - diagnosis - epidemiology - etiology
Abstract
Peripheral arterial disease and vascular calcifications contribute significantly to the outcome of dialysis patients. The aim of this study was to evaluate the prognostic role of severity of abdominal aortic calcifications and peripheral arterial disease on outcome of peritoneal dialysis (PD) patients using methods easily available in everyday clinical practice.
We enrolled 249 PD patients (mean age 61 years, 67% male) in this prospective, observational, multicenter study from 2009 to 2013. The abdominal aortic calcification score (AACS) was assessed using lateral lumbar X ray, and the ankle-brachial index (ABI) using a Doppler device.
The median AACS was 11 (range 0 - 24). In 58% of the patients, all 4 segments of the abdominal aorta showed deposits, while 19% of patients had no visible deposits (AACS 0). Ankle-brachial index was normal in 49%, low ( 1.3) in 34% of patients. Altogether 91 patients (37%) died during the median follow-up of 46 months. Only 2 patients (5%) with AACS 0 died compared with 50% of the patients with AACS = 7 (p
PubMed ID
29386304 View in PubMed
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Abdominal subcutaneous adipose tissue cellularity in men and women.

https://arctichealth.org/en/permalink/ahliterature294588
Source
Int J Obes (Lond). 2017 10; 41(10):1564-1569
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
10-2017
Author
D P Andersson
E Arner
D E Hogling
M Rydén
P Arner
Author Affiliation
Department of Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden.
Source
Int J Obes (Lond). 2017 10; 41(10):1564-1569
Date
10-2017
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Absorptiometry, Photon
Adipocytes - cytology
Adolescent
Adult
Aged
Body Composition
Body Fat Distribution
Body mass index
Female
Humans
Insulin Resistance
Male
Middle Aged
Sex Characteristics
Subcutaneous Fat, Abdominal - cytology
Sweden
Young Adult
Abstract
Differences in subcutaneous abdominal adipose tissue (SAT) fat cell size and number (cellularity) are linked to insulin resistance. Men are generally more insulin resistant than women but it is unknown whether there is a gender dimorphism in SAT cellularity. The objective was to determine SAT cellularity and its relationship to insulin sensitivity in men and women.
In a cohort study performed at an outpatient academic clinic in Sweden, 798 women and 306 men were included. Estimated SAT mass (ESAT) was derived from measures of dual-energy X-ray absorptiometry and a formula. SAT biopsies were obtained to measure mean fat cell size; SAT adipocyte number was obtained by dividing ESAT with mean fat cell weight. Fat cell size was also compared with level of insulin sensitivity in vivo.
Over the entire range of body mass index (BMI) both fat cell size and number correlated positively with ESAT in either sex. On average, fat cell size was larger in men than in women, which was driven by significantly larger fat cells in non-obese men compared with non-obese women; no gender effect on fat cell size was seen in obese subjects. For all subjects fat cell number was larger in women than men, which was driven by a gender effect among non-obese individuals (P
Notes
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PubMed ID
28630459 View in PubMed
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Absolute rather than relative income is a better socioeconomic predictor of chronic obstructive pulmonary disease in Swedish adults.

https://arctichealth.org/en/permalink/ahliterature292715
Source
Int J Equity Health. 2017 05 04; 16(1):70
Publication Type
Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Date
05-04-2017
Author
Sten Axelsson Fisk
Juan Merlo
Author Affiliation
Unit for Social Epidemiology, Faculty of Medicine, Lund University, CRC, Jan Waldeströms gata, 35, S-205 02, Malmö, Sweden. sten.axelsson_fisk@med.lu.se.
Source
Int J Equity Health. 2017 05 04; 16(1):70
Date
05-04-2017
Language
English
Publication Type
Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Aged
Female
Humans
Incidence
Income - statistics & numerical data
Logistic Models
Male
Middle Aged
Odds Ratio
Poverty - statistics & numerical data
Prevalence
Pulmonary Disease, Chronic Obstructive - economics - epidemiology
Risk assessment
Social Class
Socioeconomic Factors
Sweden - epidemiology
Abstract
While psychosocial theory claims that socioeconomic status (SES), acting through social comparisons, has an important influence on susceptibility to disease, materialistic theory says that socioeconomic position (SEP) and related access to material resources matter more. However, the relative role of SEP versus SES in chronic obstructive pulmonary disease (COPD) risk has still not been examined.
We investigated the association between SES/SEP and COPD risk among 667 094 older adults, aged 55 to 60, residing in Sweden between 2006 and 2011. Absolute income in five groups by population quintiles depicted SEP and relative income expressed as quintile groups within each absolute income group represented SES. We performed sex-stratified logistic regression models to estimate odds ratios and the area under the receiver operator curve (AUC) to compare the discriminatory accuracy of SES and SEP in relation to COPD.
Even though both absolute (SEP) and relative income (SES) were associated with COPD risk, only absolute income (SEP) presented a clear gradient, so the poorest had a three-fold higher COPD risk than the richest individuals. While the AUC for a model including only age was 0.54 and 0.55 when including relative income (SES), it increased to 0.65 when accounting for absolute income (SEP). SEP rather than SES demonstrated a consistent association with COPD.
Our study supports the materialistic theory. Access to material resources seems more relevant to COPD risk than the consequences of low relative income.
Notes
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PubMed ID
28472960 View in PubMed
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Acceleration of global vegetation greenup from combined effects of climate change and human land management.

https://arctichealth.org/en/permalink/ahliterature297897
Source
Glob Chang Biol. 2018 11; 24(11):5484-5499
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
11-2018
Author
Lanhui Wang
Feng Tian
Yuhang Wang
Zhendong Wu
Guy Schurgers
Rasmus Fensholt
Author Affiliation
Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark.
Source
Glob Chang Biol. 2018 11; 24(11):5484-5499
Date
11-2018
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Agriculture
Climate change
Forestry
Humans
Plant Development
Remote Sensing Technology
Urbanization
Abstract
Global warming and human land management have greatly influenced vegetation growth through both changes in spring phenology and photosynthetic primary production. This will presumably impact the velocity of vegetation greenup (Vgreenup, the daily rate of changes in vegetation productivity during greenup period), yet little is currently known about the spatio-temporal patterns of Vgreenup of global vegetation. Here, we define Vgreenup as the ratio of the amplitude of greenup (Agreenup) to the duration of greenup (Dgreenup) and derive global Vgreenup from 34-year satellite leaf area index (LAI) observations to study spatio-temporal dynamics of Vgreenup at the global, hemispheric, and ecosystem scales. We find that 19.9% of the pixels analyzed (n = 1,175,453) experienced significant trends toward higher greenup rates by an average of 0.018 m2  m-2  day-1 for 1982-2015 as compared to 8.6% of pixels with significant negative trends (p 
PubMed ID
29963745 View in PubMed
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Access to occupational networks and ethnic variation of depressive symptoms in young adults in Sweden.

https://arctichealth.org/en/permalink/ahliterature292368
Source
Soc Sci Med. 2017 10; 190:207-216
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
10-2017
Author
Alexander Miething
Mikael Rostila
Jens Rydgren
Author Affiliation
Department of Sociology, Stockholm University, SE-106 91 Stockholm, Sweden; Centre for Health Equity Studies (CHESS), Stockholm University, Karolinska Institutet, SE-106 91 Stockholm, Sweden. Electronic address: alexander.miething@sociology.su.se.
Source
Soc Sci Med. 2017 10; 190:207-216
Date
10-2017
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Depression - epidemiology - ethnology - psychology
Ethnic groups - psychology - statistics & numerical data
Female
Humans
Iran - ethnology
Male
Prevalence
Psychometrics - instrumentation - methods
Social capital
Socioeconomic Factors
Sweden - epidemiology - ethnology
Young Adult
Yugoslavia - ethnology
Abstract
Social capital research has recognized the relevance of occupational network contacts for individuals' life chances and status attainment, and found distinct associations dependent on ethnic background. A still fairly unexplored area is the health implications of occupational networks. The current approach thus seeks to study the relationship between access to occupational social capital and depressive symptoms in early adulthood, and to examine whether the associations differ between persons with native Swedish parents and those with parents born in Iran and the former Yugoslavia. The two-wave panel comprised 19- and 23-year-old Swedish citizens whose parents were born in either Sweden, Iran or the former Yugoslavia. The composition of respondents' occupational networks contacts was measured with a so-called position generator. Depressive symptoms were assessed with a two-item depression screener. A population-averaged model was used to estimate the associations between depressive symptoms and access to occupational contact networks. Similar levels of depressive symptoms in respondents with parents born in Sweden and Yugoslavia were contrasted by a notably higher prevalence of these conditions in those with an Iranian background. After socioeconomic conditions were adjusted for, regression analysis showed that the propensity for depressive symptoms in women with an Iranian background increased with a higher number of manual class contacts, and decreased for men and women with Iranian parents with a higher number of prestigious occupational connections. The respective associations in persons with native Swedish parents and parents from the former Yugoslavia are partly reversed. Access to occupational contact networks, but also perceived ethnic identity, explained a large portion of the ethnic variation in depression. Mainly the group with an Iranian background seems to benefit from prestigious occupational contacts. Among those with an Iranian background, social status concerns and expected marginalization in manual class occupations may have contributed to their propensity for depressive symptoms.
PubMed ID
28866474 View in PubMed
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Access to primary and specialized somatic health care for persons with severe mental illness: a qualitative study of perceived barriers and facilitators in Swedish health care.

https://arctichealth.org/en/permalink/ahliterature298634
Source
BMC Fam Pract. 2018 01 09; 19(1):12
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
01-09-2018
Author
Elisabeth Björk Brämberg
Jarl Torgerson
Anna Norman Kjellström
Peder Welin
Marie Rusner
Author Affiliation
Unit of Intervention and Implementation Research for Worker Health, Institute of Environmental Medicine, Karolinska institutet, 171 77, Stockholm, Sweden. Elisabeth.bjork.bramberg@ki.se.
Source
BMC Fam Pract. 2018 01 09; 19(1):12
Date
01-09-2018
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Adult
Comorbidity
Delivery of Health Care - organization & administration - standards
Female
General Practice - methods - organization & administration
Health Services Accessibility - standards
Health Status Disparities
Humans
Male
Mental Disorders - epidemiology - physiopathology
Middle Aged
Needs Assessment
Qualitative Research
Quality Improvement
Sweden
Abstract
Persons with severe mental illness (e.g. schizophrenia, bipolar disorder) have a high prevalence of somatic conditions compared to the general population. Mortality data in the Nordic countries reveal that these persons die 15-20 years earlier than the general population. Some factors explaining this high prevalence may be related to the individuals in question; others arise from the health care system's difficulty in offering somatic health care to these patient groups. The aim of the present study was therefore to explore the experiences and views of patients, relatives and clinicians regarding individual and organizational factors which facilitate or hinder access to somatic health care for persons with severe mental illness.
Flexible qualitative design. Data was collected by means of semi-structured individual interviews with patients with severe mental illness, relatives and clinicians representing primary and specialized health care. In all, 50 participants participated.
The main barrier to accessing somatic care is the gap between the organization of the health care system and the patients' individual health care needs. This is observed at both individual and organizational level. The health care system seems unable to support patients with severe mental illness and their psychiatric-somatic comorbidity. The main facilitators are the links between severe mental illness patients and medical departments. These links take the form of functions (i.e. systems which ensure that patients receive regular reminders), or persons (i.e. professional contacts who facilitate patients' access the health care).
Health care services for patients with severe mental illness need reorganization. Organizational structures and systems that facilitate cooperation between different departments must be put in place, along with training for health care professionals about somatic disease among psychiatric patients. The links between individual and organizational levels could be strengthened by introducing professional contacts, such as liaison physicians and case managers. This is also important to reduce stress and responsibility among relatives.
PubMed ID
29316894 View in PubMed
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Acoustic vector sensor beamforming reduces masking from underwater industrial noise during passive monitoring.

https://arctichealth.org/en/permalink/ahliterature289559
Source
J Acoust Soc Am. 2016 04; 139(4):EL105
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
04-2016
Author
Aaron M Thode
Katherine H Kim
Robert G Norman
Susanna B Blackwell
Charles R Greene
Author Affiliation
Marine Physical Laboratory, Scripps Institution of Oceanography, San Diego, California 92093-0205, USA athode@ucsd.edu.
Source
J Acoust Soc Am. 2016 04; 139(4):EL105
Date
04-2016
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Acoustics - instrumentation
Animals
Environmental Monitoring - instrumentation - methods
Equipment Design
Models, Theoretical
Motion
Noise - adverse effects
Oceans and Seas
Oil and Gas Industry
Pressure
Signal Processing, Computer-Assisted
Signal-To-Noise Ratio
Sound Spectrography
Time Factors
Transducers, Pressure
Vocalization, Animal
Water
Abstract
Masking from industrial noise can hamper the ability to detect marine mammal sounds near industrial operations, whenever conventional (pressure sensor) hydrophones are used for passive acoustic monitoring. Using data collected from an autonomous recorder with directional capabilities (Directional Autonomous Seafloor Acoustic Recorder), deployed 4.1?km from an arctic drilling site in 2012, the authors demonstrate how conventional beamforming on an acoustic vector sensor can be used to suppress noise arriving from a narrow sector of geographic azimuths. Improvements in signal-to-noise ratio of up to 15?dB are demonstrated on bowhead whale calls, which were otherwise undetectable using conventional hydrophones.
PubMed ID
27106345 View in PubMed
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