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Article ; Online: Promoting Breastfeeding-Friendly Hospital Practices: A Washington State Learning Collaborative Case Study.

Freney, Emily / Johnson, Donna / Knox, Isabella

Journal of human lactation : official journal of International Lactation Consultant Association

2016 Volume 32, Issue 2, Page(s) 355–360

Abstract: Background: Hospital breastfeeding support practices can affect breastfeeding outcomes. Learning collaboratives are an increasingly common strategy to improve practices in health care and have been applied to breastfeeding in many cases.: Objectives: ...

Abstract	Background: Hospital breastfeeding support practices can affect breastfeeding outcomes. Learning collaboratives are an increasingly common strategy to improve practices in health care and have been applied to breastfeeding in many cases. Objectives: The aims of this study of the Evidence-Based Hospital Breastfeeding Support Learning Collaborative (EBBS LC) were to describe the perceptions of participants regarding the process and effectiveness of the EBBS LC, describe perceived barriers and facilitators to implementing the Ten Steps to Successful Breastfeeding, and identify additional actions and resources needed in future learning collaboratives. Methods: Qualitative, semistructured telephone interviews were conducted with 13 key staff who represented 16 of the 18 participating hospitals. Results: The learning collaborative was perceived positively by participants, meeting the expectations of 9 and exceeding the expectations of 4 persons interviewed. The most beneficial aspect of the program was its collaborative nature, and the most difficult aspect was the time required to participate as well as technological difficulties. The key barriers were staff time, staff changes, cost, and the difficulty of changing the existing practices of hospitals and communities. The key facilitating factors were supportive management, participation in multiple breastfeeding quality improvement projects, collecting data on breastfeeding outcomes, tangible resources regarding the Ten Steps, and positive community response. Participants in the EBBS LC stated that they would like to see the Washington State Department of Health create a resource-rich, centralized source of information for participants. Conclusion: This learning collaborative approach was valued by participants. Future efforts can be guided by these evaluation findings.
MeSH term(s)	Attitude of Health Personnel ; Breast Feeding ; Cooperative Behavior ; Female ; Health Promotion/methods ; Hospitals ; Humans ; Nursing Staff, Hospital ; Outcome and Process Assessment (Health Care)/methods ; Outcome and Process Assessment (Health Care)/organization & administration ; Postnatal Care/methods ; Postnatal Care/organization & administration ; Qualitative Research ; Washington
Language	English
Publishing date	2016-05
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S.
ZDB-ID	1138470-0
ISSN	1552-5732 ; 0890-3344
ISSN (online)	1552-5732
ISSN	0890-3344
DOI	10.1177/0890334415594381
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Book ; Online: Secondary organic aerosol formation during June 2010 in Central Europe

Langmann, B. / Sellegri, K. / Freney, E.

eISSN: 1680-7324

measurements and modelling studies with a mixed thermodynamic-kinetic approach

2014

Abstract: Until recently secondary organic carbon aerosol (SOA) mass concentrations have been systematically underestimated by three-dimensional atmospheric-chemistry-aerosol models. With a newly proposed concept of aging of organic vapours, more realistic model ... ...

Abstract	Until recently secondary organic carbon aerosol (SOA) mass concentrations have been systematically underestimated by three-dimensional atmospheric-chemistry-aerosol models. With a newly proposed concept of aging of organic vapours, more realistic model results for organic carbon aerosol mass concentrations can be achieved. Applying a mixed thermodynamic-kinetic approach for SOA formation shifted the aerosol size distribution towards particles in the cloud condensation nuclei size range, thereby emphasising the importance of SOA formation schemes for modelling realistic cloud and precipitation formation. The additional importance of hetero-molecular nucleation between H 2 SO 4 and organic vapours remains to be evaluated in three-dimensional atmospheric-chemistry-aerosol models. Here a case study is presented focusing on Puy-de-Dôme, France in June 2010. The measurements indicate a considerable increase in SOA mass concentration during the measurement campaign, which could be reproduced by modelling using a simplified thermodynamic-kinetic approach for SOA formation and increased biogenic volatile organic compound (VOC) precursor emissions. Comparison with a thermodynamic SOA formation approach shows a huge improvement in modelled SOA mass concentration with the thermodynamic-kinetic approach for SOA formation. SOA mass concentration increases by a factor of up to 6 accompanied by a slight improvement of modelled particle size distribution. Even though nucleation events at Puy-de-Dôme were rare during the chosen period of investigation, a weak event in the boundary layer could be reproduced by the model in a sensitivity study when nucleation of low-volatile secondary organic vapour is included. Differences in the model results with and without nucleation of organic vapour are visible in the lower free troposphere over several days. Taking into account the nucleation of organic vapour leads to an increase in accumulation mode particles due to coagulation and condensational growth of nucleation and Aitken mode particles.
Subject code	660
Language	English
Publishing date	2014-04-16
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Quantified effect of seawater biogeochemistry on the temperature dependence of sea spray aerosol fluxes

Sellegri, Karine / Barthelmeß, Theresa / Trueblood, Jonathan / Cristi, Antonia / Freney, Evelyn / Rose, Clémence / Barr, Neill / Harvey, Mike / Safi, Karl / Deppeler, Stacy / Thompson, Karen / Dillon, Wayne / Engel, Anja / Law, Cliff

eISSN: 1680-7324

2023

Abstract: Future change in sea surface temperature may influence climate via various air–sea feedbacks and pathways. In this study, we investigate the influence of surface seawater biogeochemical composition on the temperature dependence of number-based sea spray ... ...

Abstract	Future change in sea surface temperature may influence climate via various air–sea feedbacks and pathways. In this study, we investigate the influence of surface seawater biogeochemical composition on the temperature dependence of number-based sea spray emission fluxes. The dependence of sea spray fluxes was investigated in different water masses (i.e., subantarctic, subtropical and frontal bloom) with contrasting biogeochemical properties across a temperature range from ambient (13–18 ∘ C) to 2 ∘ C using seawater circulating in a plunging jet sea spray generator. We observed a significant increase in the sea spray total concentration at temperatures below 8 ∘ C. Specifically, at 2 ∘ C, there was an average 4-fold increase compared to the initial concentration at ambient temperatures. This temperature dependence was more pronounced for smaller-sized sea spray particles (i.e., nucleation and Aitken modes). Moreover, the temperature dependence varied based on the seawater type and its biogeochemical properties. While the sea spray flux at moderate temperatures (8–11 ∘ C) was highest in frontal-bloom waters, the effect of low temperature on the sea spray flux was highest in subtropical seawaters. The temperature dependence of the sea spray flux was found to be inversely proportional to the abundance of the cyanobacterium Synechococcus in seawater. This relationship allows for parameterizing the temperature dependence of sea spray emission fluxes based on Synechococcus , which may be utilized in future modeling exercises.
Subject code	333
Language	English
Publishing date	2023-10-16
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Quantified effect of seawater biogeochemistry on the temperature dependence of sea spray aerosol fluxes

Sellegri, Karine / Barthelmess, Theresa / Trueblood, Jonathan / Cristi, Antonia / Freney, Evelyn / Rose, Clémence / Barr, Neill / Harvey, Mike / Safi, Karl / Deppeler, Stacy / Thompson, Karen / Dillon, Wayne / Engel, Anja / Law, Cliff

2023

Abstract: Future change in sea surface temperature may influence climate via various air-sea feedbacks and pathways. In this study, we investigate the influence of surface seawater biogeochemical composition on the temperature dependence of sea spray number ... ...

Abstract	Future change in sea surface temperature may influence climate via various air-sea feedbacks and pathways. In this study, we investigate the influence of surface seawater biogeochemical composition on the temperature dependence of sea spray number emission fluxes. Dependence of sea spray fluxes was investigated in different water masses (i.e. subantarctic, subtropical and frontal bloom) with contrasting biogeochemical properties across a temperature range from ambient (13–18 °C) to 2 °C, using seawater circulating in a plunging jet sea spray generator. We observed sea spray total concentration to increase significantly at temperatures below 8 °C, with an average 4-fold increase at 2 °C relative to initial concentration at ambient temperatures. This temperature dependence was more pronounced for smaller size sea spray particles (i.e. nucleation and Aitken modes). Moreover, temperature dependence varied with water mass type and so biogeochemical properties. While the sea spray flux at moderate temperatures (8–11 °C) was highest in frontal bloom waters, the effect of low temperature on the sea spray flux was highest with subtropical seawaters. The temperature dependence of sea spray flux was also inversely proportional to the seawater cell abundance of the cyanobacterium Synechococcus, which facilitated parameterization of temperature dependence of sea spray emission fluxes as a function of Synechococcus for future implementation in modelling exercises.
Language	English
Publishing date	2023-10-16
Publisher	Copernicus Publications (EGU)
Publishing country	de
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Evaluation of the Sources, Precursors, and Processing of Aerosols at a High-Altitude Tropical Site.

Dominutti, Pamela A / Chevassus, Emmanuel / Baray, Jean-Luc / Jaffrezo, Jean-Luc / Borbon, Agnès / Colomb, Aurèlie / Deguillaume, Laurent / El Gdachi, Samira / Houdier, Stephan / Leriche, Maud / Metzger, Jean-Marc / Rocco, Manon / Tulet, Pierre / Sellegri, Karine / Freney, Evelyn

ACS earth & space chemistry

2022 Volume 6, Issue 10, Page(s) 2412–2431

Abstract: This work presents the results from a set of aerosol- and gas-phase measurements collected during the BIO-MAÏDO field campaign in Réunion between March 8 and April 5, 2019. Several offline and online sampling devices were installed at the Maïdo ... ...

Abstract	This work presents the results from a set of aerosol- and gas-phase measurements collected during the BIO-MAÏDO field campaign in Réunion between March 8 and April 5, 2019. Several offline and online sampling devices were installed at the Maïdo Observatory (MO), a remote high-altitude site in the Southern Hemisphere, allowing the physical and chemical characterization of atmospheric aerosols and gases. The evaluation of short-lived gas-phase measurements allows us to conclude that air masses sampled during this period contained little or no anthropogenic influence. The dominance of sulfate and organic species in the submicron fraction of the aerosol is similar to that measured at other coastal sites. Carboxylic acids on PM
Language	English
Publishing date	2022-09-12
Publishing country	United States
Document type	Journal Article
ISSN	2472-3452
ISSN	2472-3452
DOI	10.1021/acsearthspacechem.2c00149
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Book ; Online: Hygroscopic properties and mixing state of aerosol measured at the high-altitude site Puy de Dôme (1465 m a.s.l.), France

Holmgren, H. / Sellegri, K. / Hervo, M. / Rose, C. / Freney, E. / Villani, P. / Laj, P.

eISSN: 1680-7324

2014

Abstract: A Hygroscopicity Tandem Differential Mobility Analyser (HTDMA) was used to evaluate the hygroscopic properties of aerosol particles measured at the Puy de Dôme research station in central France, periodically from September 2008 to January 2010, and ... ...

Abstract	A Hygroscopicity Tandem Differential Mobility Analyser (HTDMA) was used to evaluate the hygroscopic properties of aerosol particles measured at the Puy de Dôme research station in central France, periodically from September 2008 to January 2010, and almost continuously from October 2010 to December 2012. This high-altitude site is ideally situated to allow for both the upper part of the planetary boundary layer and the lower free troposphere to be sampled. The aim of the study is to investigate both the influence of year-to-year, seasonal and diurnal cycles, as well as the influence of air mass type on particle hygroscopicity and mixing state. Results show that particle hygroscopicity increases with particle size and depends both on air mass type and on season. Average growth factor values, GFs, are lowest in winter (1.21 ± 0.13, 1.23 ± 0.18 and 1.38 ± 0.25 for 25, 50 and 165 nm particles, respectively) and highest in autumn (1.27 ± 0.11, 1.32 ± 0.12 and 1.49 ± 0.15 for 25, 50 and 165 nm particles, respectively). Particles are generally more hygroscopic at night than during the day. The seasonal and diurnal variations are likely to be strongly influenced by boundary layer dynamics. Furthermore, particles originating from oceanic and continental regions tend to be more hygroscopic than those measured in African and local air masses. The high hygroscopicity of oceanic aerosol can be explained by large proportions of inorganic aerosol and sea salts. Aerosols measured at the Puy de Dôme display a high degree of external mixing, and hygroscopic growth spectra can be divided into three different hygroscopic modes: a less-hygroscopic mode (GF < 1.3), a hygroscopic mode (GF~1.3–1.7) and a more-hygroscopic mode (GF > 1.7). The majority of particles measured can be classified as being in either the less-hygroscopic mode or the hygroscopic mode, and only few of them have more-hygroscopic properties. The degree of external mixing, evaluated as the fraction of time when the aerosol is found with two or more aerosol populations with different hygroscopic properties, increases with particle size (average yearly values are 20, 28 and 45 {%} for 25, 50, and 165 nm particles, respectively). The degree of external mixing is more sensitive to season than to air mass type, and it is higher in the cold seasons than in the warm seasons. With more than two years of nearly continuous measurements, this study gathers the results from one of the longest data sets of hygroscopic growth factor measurements to date, allowing a statistically relevant hygroscopic growth parameterization to be determined as a function of both air mass type and season.
Subject code	551
Language	English
Publishing date	2014-09-16
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Modeling organic aerosol composition at the puy de Dôme mountain (France) for two contrasted air masses with the WRF-Chem model

Barbet, C. / Deguillaume, L. / Chaumerliac, N. / Leriche, M. / Berger, A. / Freney, E. / Colomb, A. / Sellegri, K. / Patryl, L. / Armand, P.

eISSN: 1680-7324

2015

Abstract: Simulations with the chemistry-transport model WRF-Chem are compared to aerosol measurements performed at the puy de Dôme station with a compact Time-of-Flight Aerosol Mass Spectrometer (cToF-AMS) for two episodes in autumn 2008 and in summer 2010. The ... ...

Abstract	Simulations with the chemistry-transport model WRF-Chem are compared to aerosol measurements performed at the puy de Dôme station with a compact Time-of-Flight Aerosol Mass Spectrometer (cToF-AMS) for two episodes in autumn 2008 and in summer 2010. The WRF-Chem model is used with the Volatility Basis Set (VBS) approach dedicated to the formation of secondary organic aerosol (SOA). The model systematically underestimates the observed concentrations of organic aerosol (OA), with significant differences observed for the summer case. For this event, where high OA concentrations were observed (12.5 μg m -3 in average), simulated OA mass concentration is 2.0 μg m -3 . For the autumn event, observed OA concentrations reached 2.6 μg m -3 . The simulated concentrations reached only 0.6 μg m -3 . During the summer event, several gas-phase volatile organic compounds (VOCs) were measured and were used to test the robustness of both emission/dry deposition and SOA formation processes. The concentrations of VOCs, and more specifically the anthropogenic ones, calculated by the model are estimated to be much lower than the observed ones. Hence, the emissions of all SOA precursors are multiplied by 2 in the model: this induces an increase of the mean OA mass concentration of 25% (+0.5 μg m -3 ) and 18% (+0.4 μg m -3 ), respectively for anthropogenic and biogenic VOCs. The dry deposition of gas-phase organic condensable vapours (OCVs) is also critical to predict the SOA mass concentrations: dividing the deposition factor by 2 leads to an increase of OA mass by an additional 12% (+0.2 μg m -3 ). However, these increases were not sufficient to explain the observed OA concentration, and the underestimation of the OA concentration levels seems to be principally related to a lack in the parameterization of SOA formation. Changing the oxidation rate of OCVs from 1.0 × 10 -11 to 4.0 × 10 -11 cm 3 molecule −1 s -1 , doubling the SOA yields for anthropogenic VOCs and finally doubling the SOA yields for biogenic VOCs results in an increase of the mean OA mass concentration by 56% (+1.1 μg m -3 ), 61% (+1.2 μg m -3 ) and 40% (+0.8 μg m -3 ), respectively. The consideration of both emission/dry deposition and SOA formation processes tests lead to a mean OA mass concentration of 10.7 μg m -3 for 2010, a value that is close to the observations. For 2008, modifying solely the oxidation rate of OCVs and the SOA yields is sufficient to reproduce the observed level of mean OA mass (a mass of 2.4 μg m -3 is obtained by the model whereas a mass of 2.6 μg m -3 was observed).
Subject code	333
Language	English
Publishing date	2015-05-08
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Comparative trends and seasonal variation of ⁷Be, ²¹⁰Pb and ¹³⁷Cs at two altitude sites in the central part of France.

Bourcier, L / Masson, O / Laj, P / Pichon, J M / Paulat, P / Freney, E / Sellegri, K

Journal of environmental radioactivity

2011 Volume 102, Issue 3, Page(s) 294–301

Abstract: The atmospheric concentrations of ¹³⁷Cs, ²¹⁰Pb, and ⁷Be were measured over a three-year period at two research stations located less than 12 km apart and at different altitudes (puy de Dôme, 1465 m a.s.l. and Opme, 660 m a.s.l., France). Seasonal trends ... ...

Abstract	The atmospheric concentrations of ¹³⁷Cs, ²¹⁰Pb, and ⁷Be were measured over a three-year period at two research stations located less than 12 km apart and at different altitudes (puy de Dôme, 1465 m a.s.l. and Opme, 660 m a.s.l., France). Seasonal trends in all radionuclides were observed at both stations, with high concentration measured during the summer and low concentrations during the winter. The ²¹⁰Pb concentrations at both stations were similar to each other. Higher concentrations of both ⁷Be and ¹³⁷Cs were measured at puy de Dôme than at Opme. These observations can be explained by the stratospheric and upper tropospheric sources of ⁷Be and the long-range transportation of ¹³⁷Cs at high altitudes. Air mass origins during sampling periods were classified into several groups by their route to the stations (marine, marine modified, continental and mediterranean). We observed that ⁷Be concentrations were constant regardless of the air mass origins, unlike ¹³⁷Cs and ²¹⁰Pb concentrations that increased when influenced by continental air masses. Higher ⁷Be concentrations were observed when air masses were arriving from the upper troposphere than from the boundary layer, the opposite was observed for ¹³⁷Cs. The temporal trend in concentrations of ⁷Be shows good agreement with previous modelling studies suggesting that there is a good understanding of its sources and the atmospheric vertical mixing of this radionuclide. The sources and mixing of ²¹⁰Pb, however, seem to be more complex than it appeared to be in previous modelling studies.
MeSH term(s)	Altitude ; Beryllium/analysis ; Carbon Isotopes/analysis ; Environmental Monitoring ; France ; Lead Radioisotopes/analysis ; Seasons
Chemical Substances	Carbon Isotopes ; Lead Radioisotopes ; Beryllium (OW5102UV6N)
Language	English
Publishing date	2011-03
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	1483112-0
ISSN	1879-1700 ; 0265-931X
ISSN (online)	1879-1700
ISSN	0265-931X
DOI	10.1016/j.jenvrad.2010.12.005
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Book ; Online: Aerosol cloud activation in summer and winter at puy-de-Dôme high altitude site in France

Asmi, E. / Freney, E. / Hervo, M. / Picard, D. / Rose, C. / Colomb, A. / Sellegri, K.

eISSN: 1680-7324

2012

Abstract: Cloud condensation nuclei (CCN) size distributions and numbers were measured for the first time at Puy-de-Dôme high altitude (1465 m a.s.l) site in Central France. Majority of the measurements were done at constant supersaturation (SS) of 0.24%, which ... ...

Abstract	Cloud condensation nuclei (CCN) size distributions and numbers were measured for the first time at Puy-de-Dôme high altitude (1465 m a.s.l) site in Central France. Majority of the measurements were done at constant supersaturation (SS) of 0.24%, which was also deduced to be representative of the typical in-cloud SS at the site. CCN numbers during summer ranged from about 200 up to 2000 cm −3 and during winter from 50 up to 3000 cm −3 . Variability of CCN number was explained by both particle chemistry and size distribution variability. The higher CCN concentrations were measured in continental, in contrast to marine, air masses. Aerosol CCN activity was described with a single hygroscopicity parameter κ. Range of this parameter was 0.29 ± 0.13 in summer and 0.43 ± 0.19 in winter. When calculated using SS of 0.51% during summer, κ of 0.22 ± 0.07 was obtained. The decrease with increasing SS is likely explained by the particle size dependent chemistry with smaller particles containing higher amounts of freshly emitted organic species. Higher κ values during winter were for the most part explained by the observed aged organics (analysed from organic m/z 44 ratio) rather than from aerosol organic to inorganic volume fraction. The obtained κ values also fit well within the range of previously proposed global continental κ of 0.27 ± 0.21. During winter, the smallest κ values and the highest organic fractions were measured in marine air masses. CCN closure using bulk AMS chemistry led to positive bias of 5% and 2% in winter and summer, respectively. This is suspected to stem from size dependent aerosol organic fraction, which is underestimated by using AMS bulk mass composition. Finally, the results were combined with size distributions measured from interstitial and whole air inlets to obtain activated droplet size distributions. Cloud droplet number concentrations were shown to increase with accumulation mode particle number, while the real in-cloud SS correspondingly decreased. These results provide evidence on the effects of aerosol particles on maximum cloud supersaturations. Further work with detailed characterisation of cloud properties is proposed in order to provide more quantitative estimates on aerosol effects on clouds.
Subject code	333
Language	English
Publishing date	2012-12-04
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Surface ocean microbiota determine cloud precursors.

Scientific reports

2021 Volume 11, Issue 1, Page(s) 281

Abstract: One pathway by which the oceans influence climate is via the emission of sea spray that may subsequently influence cloud properties. Sea spray emissions are known to be dependent on atmospheric and oceanic physicochemical parameters, but the potential ... ...

Abstract	One pathway by which the oceans influence climate is via the emission of sea spray that may subsequently influence cloud properties. Sea spray emissions are known to be dependent on atmospheric and oceanic physicochemical parameters, but the potential role of ocean biology on sea spray fluxes remains poorly characterized. Here we show a consistent significant relationship between seawater nanophytoplankton cell abundances and sea-spray derived Cloud Condensation Nuclei (CCN) number fluxes, generated using water from three different oceanic regions. This sensitivity of CCN number fluxes to ocean biology is currently unaccounted for in climate models yet our measurements indicate that it influences fluxes by more than one order of magnitude over the range of phytoplankton investigated.
MeSH term(s)	Atmosphere/chemistry ; Climate ; Microbiota ; Seawater/microbiology
Language	English
Publishing date	2021-01-11
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-020-78097-5
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