Search

Soil Moisture (SM) is a key parameter in northern Arctic and sub-Arctic (A-SA) environments that are highly vulnerable to climate change. We evaluated six SM satellite passive microwave datasets using thirteen ground-based SM stations across Northwestern America. The best agreement was obtained with SMAP (Soil Moisture Active Passive) products with the lowest RMSD (Root Mean Square Difference) (0.07 m[Formula: see text] m[Formula: see text]) and the highest R (0.55). ESA CCI (European Space Agency Climate Change Initiative) also performed well in terms of correlation with a similar R (0.55) but showed a strong variation among sites. Weak results were obtained over sites with high water body fractions. This study also details and evaluates a dedicated retrieval of SM from SMOS (Soil Moisture and Ocean Salinity) brightness temperatures based on the [Formula: see text] model. Two soil dielectric models (Mironov and Bircher) and a dedicated soil roughness and single scattering albedo parameterization were tested. Water body correction in the retrieval shows limited improvement. The metrics of our retrievals (RMSD = 0.08 m[Formula: see text] m[Formula: see text] and R = 0.41) are better than SMOS but outperformed by SMAP. Passive microwave satellite remote sensing is suitable for SM retrieval in the A-SA region, but a dedicated approach should be considered.

This study attempts to derive the uncertainty of the soil moisture estimation from passive microwave satellite mission at global scale. To do so, the approach is based on the sensitivity of the Soil Moisture and Ocean Salinity (SMOS) soil moisture retrieval quality to the land surface characteristics within its footprint (presence of forest, topography, open water bodies, sand, clay, bulk density and soil organic carbon content). First, we performed a global assessment of SMOS using in situ measurements from the International Soil Moisture Network (ISMN) as reference, with more than 1900 ISMN stations and 10 years of SMOS data. This assessment shows that the ubRMSD scores vary greatly between locations (with a mean of 0.074 m3m−3 and an interquartile range of 0.030 m3m−3). Second, the scores are analyzed for different surface conditions within the satellite footprint. The best agreement between the ground measurement and SMOS time series are obtained for low forest cover, low topographic complexity, and marginal presence of open water bodies within the SMOS footprint. Soil parameters also have an impact, with better scores for sandier soils with a high bulk-density and low soil organic carbon content. Finally, we propose to extrapolate the obtained relationships, using a multiple linear regression, in order to derive a global map of SMOS uncertainties based on surface conditions. This map of predicted uncertainties show a diverse range of ubRMSD values across the globe (with a mean of 0.076 m3m−3 and an interquartile range of 0.031 m3m−3) depending on the surface characteristics. At the ISMN site location, the predicted ubRMSD shows similar results than the comparison between SMOS and the in situ measurements. The map of predicted SMOS ubRMSD represents an upper bound estimate of the SMOS uncertainty, as it includes the uncertainties of the in situ sensor measurements and the scale mismatch. Further investigations will focus on the different components of this uncertainty budget to obtain a better assessment of the absolute uncertainties of SMOS soil moisture retrievals across the globe.

Abstract Background Despite widespread use of the short-video social media platform TikTok©, limited research investigates how alcohol is portrayed on the platform. Previous research suggests that a driver of alcohol content on TikTok©, in part, comes from bartenders demonstrating how to make drinks. This study aims to explore the characterizing patterns of how bartender influencers on TikTok© feature and incorporate alcohol in their videos. Methods We identified the global top 15 most followed bartenders on TikTok© in 2021 (cumulative 29.7 million subscribers) and the videos they posted in November and December 2021, the period just before Christmas and New Year, when alcohol tends to be more marketed than in other periods. The videos were coded based on five criteria: (1) the presence of alcohol or not; (2) alcohol categories; (3); alcohol brand(s) if visible; (4) the presence of candies and other sweet products; (5) presence of cues that refer to young people’s interests. Results In total, we identified 345 videos, which received 270,325,600 views in total, with an average of 18,021,707 views per video. Among these 345 videos, 92% (n = 317) displayed alcohol in their cocktail recipes (249,275,600 views, with an average of 786,358 views). The most common types of alcohol present in videos were liquor, vodka, rum, and whiskey, all of which are high-ABV beverages. 73% (n = 230) displayed or mentioned an alcohol brand. 17% (n = 55) associated alcohol with sweet products such as different types of candy (53,957,900 views, with an average of 981,053 views per video). 13% (n = 43) contained cues appealing to young people (e.g., cartoons, characters) (15,763,300 views, with an average of 366,588 views per video). Conclusions Our findings suggest a large presence of positively framed alcohol content posted by popular bartenders on TikTok©. As exposure to digital marketing is related to an increase in alcohol consumption, particularly among young people, regulations are needed to protect the public from alcohol-related harms.

Abstract A data-driven approach insensitive to the initial conditions was developed to extract governing equations for the concentration of CO2 in the Altamira cave (Spain) and its two main drivers: the outside temperature and the soil moisture. This model was then reformulated in order to use satellite observations and meteorological predictions, as a forcing. The concentration of CO2 inside the cave was then investigated from 1950 to 2100 under various scenarios. It is found that extreme levels of CO2 were reached during the period 1950–1972 due to the massive affluence of visitors. It is demonstrated that it is possible to monitor the CO2 in the cave in real time using satellite information as an external forcing. For the future, it is shown that the maximum values of CO2 will exceed the levels reached during the 1980s and the 1990s when the CO2 introduced by the touristic visits, although intentionally reduced, still enhanced considerably the micro corrosion of walls and pigments.

The lobbying strategies of the food industry, which seek to undermine the development of regulatory measures intended to improve public health, are increasingly well documented and associated with slow progress in addressing diet-related diseases at national, regional and global levels. These strategies include the creation and dissemination of biased research findings in order to skew evidence in the favour of the industry, and to cast doubt about the harms stemming from its products and practices. Front-of-pack nutrition labelling (FoPNL) provides fertile ground for industry opposition, which we discuss in this commentary.

Abstract Background The exploitative marketing of commercial milk formula (CMF) reduces breastfeeding, and harms child and maternal health globally. Yet forty years after the International Code of Marketing of Breast-Milk Substitutes (The Code) was adopted by WHO member states, many countries are still to fully implement its provisions into national law. Furthermore, despite The Code, worldwide CMF markets have markedly expanded. In this paper, we adopt Brazil as a case study to understand the power of the baby food industry’s marketing and corporate political activity, and how this influences the country’s ‘first-food system’ in ways that promote and sustain CMF consumption. Methods We used a case study design, drawing data from from documents and key informant interviews (N = 10). Results Breastfeeding rates plummeted in Brazil to a historic low in the 1970s. A resurgence in breastfeeding from the mid-1980s onwards reflected strengthening political commitment for a national policy framework and breastfeeding protection law, resulting in-turn, from collective actions by breastfeeding coalitions, advocates, and mothers. Yet more recently, improvements in breastfeeding have plateaued in Brazil, while the industry grew CMF sales in Brazil by 750% between 2006 and 20. As regulations tightened, the industry has more aggressively promoted CMF for older infants and young children, as well as specialised formulas. The baby food industry is empowered through association with powerful industry groups, and employs lobbyists with good access to policymakers. The industry has captured the pediatric profession in Brazil through its long-standing association with the Brazilian Society of Pediatrics. Conclusion Brazil illustrates how the baby food industry uses marketing and political activity to promote and sustain CMF markets, to the detriment of breastfeeding. Our results demonstrate that this industry requires much greater scrutiny by regulators.

Background In recent years, interactions between nutrition professionals (NPs) and the food industry, such as sponsorship arrangements, have raised concerns, particularly as these may negatively impact the trustworthiness and credibility of the nutrition profession. This study aimed to map the literature and identify knowledge gaps regarding interactions between NPs and industry. We sought to examine the nature of such interactions and NPs perspectives about these, as well as the risks and solutions.Methods We conducted a scoping review according to a pre-registered protocol, searching eight electronic databases and grey literature sources in March 2021 to identify documents for inclusion. Two independent reviewers screened citations for inclusion and conducted data extraction. Quantitative and qualitative syntheses were conducted.Results We identified 115 documents for analysis, published between 1980 to 2021, with a majority from the United States (n = 59, 51%). Only 32% (n = 37) were empirical studies. The food industry was the most frequent industry type discussed (n = 91, 79%). We identified 32 types of interactions between NPs and industry, such as continuing education provided by industry and sponsorship of professional bodies and health and nutrition organizations. The financial survival of nutrition organizations and continuing education access for NPs were the most frequently cited advantages of industry-NPs interactions. On the other hand, undermining public trust, NPs credibility and public health nutrition recommendations were pointed out as risks of these interactions. Following a code of ethics, policies, or guidelines was the most frequently proposed solution for managing these interactions.Conclusion Despite the increasing attention given to this issue, few empirical papers have been published to date. There is a need for more research to better and systematically document industry interactions with NPs and the impacts associated with these, as well as more research on effective management strategies.

Background Non-communicable diseases (NCDs) kill 41 million people a year. The products and services of unhealthy commodity industries (UCIs) such as tobacco, alcohol, ultra-processed foods and beverages and gambling are responsible for much of this health burden. While effective public health policies are available to address this, UCIs have consistently sought to stop governments and global organisations adopting such policies through what is known as corporate political activity (CPA). We aimed to contribute to the study of CPA and development of effective countermeasures by formulating a model and evidence-informed taxonomies of UCI political activity.Methods We used five complementary methods: critical interpretive synthesis of the conceptual CPA literature; brief interviews; expert co-author knowledge; stakeholder workshops; testing against the literature.Results We found 11 original conceptualisations of CPA; four had been used by other researchers and reported in 24 additional review papers. Combining an interpretive synthesis of all these papers and feedback from users, we developed two taxonomies – one on framing strategies and one on action strategies. The former identified three frames (policy actors, problem, and solutions) and the latter six strategies (access and influence policy-making, use the law, manufacture support for industry, shape evidence to manufacture doubt, displace, and usurp public health, manage reputations to industry’s advantage). We also offer an analysis of the strengths and weaknesses of UCI strategies and a model that situates industry CPA in the wider social, political, and economic context.Conclusion Our work confirms the similarity of CPA across UCIs and demonstrates its extensive and multi-faceted nature, the disproportionate power of corporations in policy spaces and the unacceptable conflicts of interest that characterise their engagement with policy-making. We suggest that industry CPA is recognised as a corruption of democracy, not an element of participatory democracy. Our taxonomies and model provide a starting point for developing effective solutions.

IntroductionWe analyzed the bio-food industry’s corporate political activity (CPA) during the revisions of Canada’s food guide between 2016 and 2019. MethodsWe undertook a content analysis of the websites of 11 bio-food industry organizations and of the briefs that 10 of them submitted to the Canadian House of Commons Standing Committee on Health, as part of this Committee’s review of the food guide. Data were classified according to an existing conceptual framework. ResultsWe identified 366 examples of CPA used by the bio-food industry during and immediately after the development of the food guide. Most of the industry actors opposed the guide’s recommendations. The most common CPA strategies were information management (n = 197), used to create and disseminate information in industry’s favour, and discursive strategies (n = 108), used to defend food products and promote the industry’s position regarding the food guide. Influencing public policy (n = 40), by gaining indirect access to policy makers (e.g. through lobbying) and becoming active in government decision-making, as well as coalition management (n = 21), by establishing relationships with opinion leaders and health organizations, were also common strategies. ConclusionBio-food industry actors used many different CPA strategies during the revisions of the food guide. It is important to continue to document the bio-food industry’s CPA to understand whether and how this is shaping public policy development in Canada and elsewhere.

IntroductionNous avons analysé les activités politiques corporatives de l’industrie bioalimentaire pendant le processus de révision du guide alimentaire canadien entre 2016 et 2019. MéthodologieNous avons entrepris une analyse du contenu du site Web de 11 organisations de l’industrie bioalimentaire et des mémoires que 10 d’entre elles ont présentés au Comité permanent de la santé de la Chambre des communes du Canada dans le cadre de la révision du guide alimentaire canadien par le Comité. Les données ont été classées selon un cadre conceptuel préexistant. RésultatsNous avons relevé 366 exemples d’activités politiques utilisées par des organisations de l’industrie bioalimentaire pendant et immédiatement après l’élaboration du guide alimentaire canadien. La plupart des acteurs de l’industrie se sont opposés aux recommandations du guide. Les stratégies les plus utilisées étaient la gestion de l’information (n = 197), pour créer et diffuser de l’information en faveur des positions de l’industrie, et des stratégies discursives (n = 108), pour défendre certains produits alimentaires et promouvoir la position de l’industrie à l’égard du guide alimentaire. Parmi les autres stratégies couramment employées, citons les activités visant à influencer les politiques publiques (n = 40), en obtenant un accès indirect aux décideurs (par exemple par le lobbying) et en participant activement au processus décisionnel du gouvernement, et les activités de gestion de coalition (n = 21), qui consistaient à établir des relations avec des leaders d’opinion et des organisations oeuvrant dans le domaine de la santé. ConclusionLes acteurs de l’industrie bioalimentaire ont utilisé de nombreuses stratégies pour mener des activités politiques corporatives pendant la révision du guide alimentaire canadien. Il est important de continuer à documenter les activités politiques menées par les organisations de l’industrie bioalimentaire pour comprendre si et comment elles façonnent l’élaboration des politiques publiques au Canada et ailleurs.

Abstract Background In recent decades there has been a global rise in consumption of ultra-processed foods (UPFs) to the detriment of population health and the environment. Large corporations that have focused heavily on low-cost manufacturing and extensive marketing of UPFs to maximise profits have driven this dietary transition. The same corporations claim to serve the interests of multiple ‘stakeholders’, and that they are contributing to sustainable development. This paper aimed to test these claims by examining the degree to which UPF corporations have become ‘financialised’, focusing on the extent to which they have prioritised the financial interests of their shareholders relative to other actors, as well as the role that various types of investors have played in influencing their governance. Findings were used to inform discussion on policy responses to improve the healthiness of population diets. Methods We adopted an exploratory research design using multiple methods. We conducted quantitative analysis of the financial data of U.S. listed food and agricultural corporations between 1962 and 2021, share ownership data of a selection of UPF corporations, and proxy voting data of a selection of investors between 2012 and 2022. We also conducted targeted narrative reviews using structured and branching searches of academic and grey literature. Results Since the 1980s, corporations that depend heavily on manufacturing and marketing UPFs to generate profits have been increasingly transferring money to their shareholders relative to their total revenue, and at a level considerably higher than other food and agricultural sectors. In recent years, large hedge fund managers have had a substantial influence on the governance of major UPF corporations in their pursuit of maximising short-term returns. In comparison, shareholders seeking to take steps to improve population diets have had limited influence, in part because large asset managers mostly oppose public health-related shareholder proposals. Conclusions The operationalisation of ‘shareholder primacy’ by major UPF corporations has driven inequity and undermines their claims that they are creating ‘value’ for diverse actors. Measures that protect population diets and food systems from the extractive forces of financialisation are likely needed as part of efforts to improve the healthiness of population diets.

Abstract Objective: To gain insight into the experiences and perspectives of registered dietitians (RD) in Canada regarding their interactions with commercial actors and actions undertaken to manage these interactions. Design: Qualitative study using semi-structured interviews combined with a document analysis. Setting: Quebec, Canada Participants: RD aged ≥ 18 years (n 18) Results: All participants reported interacting with commercial actors during their careers, such as receiving continuing education provided or sponsored by food companies. RD in Quebec perceive these interactions as either trivial or acceptable, depending on the commercial actor or interaction type. Participants discussed how certain interactions could represent a threat to the credibility and public trust in dietitians, among other risks. They also discussed the benefits of these interactions, such as the possibility for professionals to improve the food supply and public health by sharing their knowledge and expertise. Participants reported ten mechanisms used to manage interactions with commercial actors, such as following a code of ethics (individual level) and policies such as partnerships policy (institutional level). Finally, RD also stressed the need for training and more explicit and specific tools for managing interactions with commercial actors. Conclusions: RD in Quebec, Canada, may engage with commercial actors in their profession and hold nuanced perspectives on this matter. While some measures are in place to regulate these interactions, they are neither standardised nor evaluated for their effectiveness. To maintain the public’s trust in RD, promoting awareness and developing training on this issue is essential.

Abstract Objectives: To measure incidence of conflicts of interest (COI) with food and pharmaceutical industry actors on the advisory committee for the 2020–2025 US Dietary Guidelines for Americans (DGA) and assess the adequacy of current mechanisms to disclose and manage COI among the committee’s members. Design: We compiled longitudinal data from archival sources on connections between members of the DGA’s advisory committee and actors. We hypothesised that these committee members, who oversee the science for the most influential dietary policy in the USA, might have significant COI that would be relevant to their decision making. Disclosure of COI on this committee was recommended in 2017 by the National Academies of Sciences in order to increase transparency and manage bias, but public disclosure of the committee’s COI does not appear to have taken place. Setting: The committee was composed of twenty experts. Participants: None. Results: Our analysis found that 95 % of the committee members had COI with the food and/or pharmaceutical industries and that particular actors, including Kellogg, Abbott, Kraft, Mead Johnson, General Mills, Dannon and the International Life Sciences, had connections with multiple members. Research funding and membership of an advisory/executive board jointly accounted for more than 60 % of the total number of COI documented. Conclusions: Trustworthy dietary guidelines result from a transparent, objective and science-based, process. Our analysis has shown that the significant and widespread COI on the committee prevent the DGA from achieving the recommended standard for transparency without mechanisms in place to make this information publicly available.

Mexico is the largest soft drink market in the world, with high rates of obesity and type 2 diabetes. Due to strains on the nation's productivity and healthcare spending, Mexican lawmakers implemented one of the world's first public health taxes on sugar-sweetened beverages (SSBs) in 2014. Because Mexico's tax was designed to reduce SSB consumption, it faced strong opposition from transnational food and beverage corporations. We analysed previously secret internal industry documents from major corporations in the University of California San Francisco's Food Industry Documents Archive that shed light on the industry response to the Mexican soda tax. We also reviewed all available studies of the Mexican soda tax's effectiveness, contrasting the results of industry-funded and non-industry-funded studies. We found that food and beverage industry trade organisations and front groups paid scientists to produce research suggesting that the tax failed to achieve health benefits while harming the economy. These results were disseminated before non-industry-funded studies could be finalized in peer review. Mexico still provided a real-world context for the first independent peer-reviewed studies documenting the effectiveness of soda taxation-studies that were ultimately promoted by the global health community. We conclude that the case of the Mexican soda tax shows that industry resistance can persist well after new policies have become law as vested interests seek to roll back legislation, and to stall or prevent policy diffusion. It also underscores the decisive role that conflict-of-interest-free, peer-reviewed research can play in implementing health policy innovations.

BackgroundThe global milk formula market has 'boomed' in recent decades, raising serious concerns for breastfeeding, and child and maternal health. Despite these developments, few studies have investigated the global expansion of the baby food industry, nor the market and political practices corporations have used to grow and sustain their markets. In this paper, our aim is to understand the strategies used by the baby food industry to shape 'first-foods systems' across its diverse markets, and in doing so, drive milk formula consumption on a global scale. We used a theoretically guided synthesis review method, which integrated diverse qualitative and quantitative data sources.ResultsGlobal milk formula sales grew from ~US$1.5 billion in 1978 to US$55.6 billion in 2019. This remarkable expansion has occurred along two main historical axes. First, the widening geographical reach of the baby food industry and its marketing practices, both globally and within countries, as corporations have pursued new growth opportunities, especially in the Global South. Second, the broadening of product ranges beyond infant formula, to include an array of follow-up, toddler and specialized formulas for a wider range of age groups and conditions, thereby widening the scope of mother-child populations subject to commodification. Sophisticated marketing techniques have been used to grow and sustain milk formula consumption, including marketing through health systems, mass-media and digital advertising, and novel product innovations backed by corporate science. To enable and sustain this marketing, the industry has engaged in diverse political practices to foster favourable policy, regulatory and knowledge environments. This has included lobbying international and national policy-makers, generating and deploying favourable science, leveraging global trade rules and adopting corporate policies to counter regulatory action by governments.ConclusionThe baby food industry uses integrated market and political strategies to shape first-foods systems in ways that drive and sustain milk formula market expansion, on a global scale. Such practices are a major impediment to global implementation of the International Code of Marketing of Breastmilk Substitutes, and other policy actions to protect, promote and support breastfeeding. New modalities of public health action are needed to negate the political practices of the industry in particular, and ultimately to constrain corporate power over the mother-child breastfeeding dyad.

N/a.

ABSTRACT Hepatitis C virus (HCV) particles secreted from cells are stable at 37°C, whether the producer cell media contain serum or not. Yet, we found that intracellular HCV particles harvested after freeze-thawing of producer cells are highly unstable upon resuspension in a serum-free medium, indicating that either HCV particles gain intrinsic stability during their secretion and egress from producer cells or, alternatively, that a factor secreted from cells can stabilize intrinsically unstable HCV particles. We aimed at investigating either possibility and unraveling the mechanisms evolved by HCV to promote the stability of its viral particles. We showed that after purification and resuspension in a serum-free medium, HCV infectious particles released in cell supernatants are quickly and specifically degraded at 37°C in comparison to other viruses that can infect hepatic cells. We also found that cell-secreted proteins, including human serum albumin and transferrin, could protect HCV particles from this loss of infectivity. Moreover, we showed that such protection mainly impacted low-density particles (d < 1.08), suggesting a specific alteration of viral particles that are lipidated. Since we also demonstrated that neither HCV RNA nor surface glycoproteins were altered, this suggested that virion lipids are sensitive to decay, resulting in a loss of infectivity. Indeed, our results further indicated that HCV particles are sensitive to oxidation, which leads to a loss of their membrane fusion capacity. Altogether, our results indicate that HCV is highly sensitive to oxidation and highlight a specific protection mechanism evolved by HCV to prevent oxidation-mediated degradation of its lipidated particles by using secreted factors. IMPORTANCE Assessments of viral stability on surfaces or in body fluids under different environmental conditions and/or temperatures are often performed, as they are key to understanding the routes and parameters of viral transmission and to providing clues on the epidemiology of infections. However, for most viruses, the mechanisms of inactivation vs stability of viral particles remain poorly defined. Although they are structurally diverse, with different compositions, sizes, and shapes, enveloped viruses are generally less stable than non-enveloped viruses, pointing out the role of envelopes themselves in virus lability. In this report, we investigated the properties of hepatitis C virus (HCV) particles with regards to their stability. We found that, compared to alternative enveloped viruses such as Dengue virus (DENV), severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), hepatitis delta virus (HDV), and Crimean–Congo hemorrhagic fever virus (CCHFV) that infect the liver, HCV particles are intrinsically labile. We determined the mechanisms that drastically alter their specific infectivity through oxidation of their lipids, and we highlighted that they are protected from lipid oxidation by secreted cellular proteins, which can protect their membrane fusion capacity and overall infectivity.

As evidence mounts that corporate actor engagement in United Nations (UN) policy- making processes leads to weaker and shallower public health commitments, greater attention is being paid to how to minimise undue interference and manage conflicts of interest (CoI). While we welcome efforts to develop normative guidance on managing such conflicts, we argue that there is the need to go further. In particular, we propose that an index be developed that would assess the health impacts of individual corporate actors, and those actors who fail to achieve a set benchmark would not have engagement privileges. We further propose the establishment of an independent panel of experts to advise on corporate actor engagement as well as on ambiguous and potentially health- harming commitments in text under negotiation in the UN. Recognising that the implementation of such measures will be contested, we recommend a number of practical steps to make their implementation more politically palatable.

Anthropogenic climate change is now considered to be one of the main factors causing an increase in both the frequency and severity of wildfires. These fires are prone to release substantial quantities of CO2 into the atmosphere and to endanger natural ecosystems and biodiversity. Depending on the ecosystem and climate regime, fires have distinct triggering factors and impacts. To better analyse this phenomenon, we investigated post-fire vegetation anomalies over different biomes, from 2012 to 2020. The study was performed using several remotely sensed quantities ranging from visible–infrared vegetation indices (the enhanced vegetation index (EVI)) to vegetation opacities obtained at several passive-microwave wavelengths (X-band, C-band, and L-band vegetation optical depth (X-VOD, C-VOD, and L-VOD)), ranging from 2 to 20 cm. It was found that C- and X-VOD are mostly sensitive to fire impact on low-vegetation areas (grass and shrublands) or on tree leaves, while L-VOD depicts the fire impact on tree trunks and branches better. As a consequence, L-VOD is probably a better way of assessing fire impact on biomass. The study shows that L-VOD can be used to monitor fire-affected areas as well as post-fire recovery, especially over densely vegetated areas.