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The Earth’s magnetosphere and its bow shock, which is formed by the interaction of the supersonic solar wind with the terrestrial magnetic field, constitute a rich natural laboratory enabling in situ investigations of universal plasma processes. Under suitable interplanetary magnetic field conditions, a foreshock with intense wave activity forms upstream of the bow shock. So-called 30 s waves, named after their typical period at Earth, are the dominant wave mode in the foreshock and play an important role in modulating the shape of the shock front and affect particle reflection at the shock. These waves are also observed inside the magnetosphere and down to the Earth’s surface, but how they are transmitted through the bow shock remains unknown. By combining state-of-the-art global numerical simulations and spacecraft observations, we demonstrate that the interaction of foreshock waves with the shock generates earthward-propagating, fast-mode waves, which reach the magnetosphere. These findings give crucial insight into the interaction of waves with collisionless shocks in general and their impact on the downstream medium.The Earth’s bow shock results from the interaction of the solar wind with the terrestrial magnetic field. With global numerical simulations and spacecraft observations, the transmission of fast magnetosonic waves through the bow shock is revealed.

Magnetic reconnection and current sheet kink instability often develop concurrently in current sheets, yet their dynamic interplay remains unclear. We investigate their interaction in the magnetotail of a 3D global magnetospheric hybrid‐Vlasov simulation. We identify the instability growth and saturation phase and estimate the evolution of the reconnection rate during the same interval. Our findings indicate that the reconnection rate decreases during the instability growth phase, especially at locations where the current sheet undergoes significant perturbations. These results highlight the intricate three‐dimensional relationship between reconnection and kink instabilities, suggesting that the kink instability plays a significant role in modulating the reconnection rate. Plain Language Summary Magnetic reconnection is a fundamental process in plasmas during which magnetic field energy is transferred, often explosively, to plasma particles. Magnetic reconnection develops in current sheets—extended regions of enhanced electric currents that are ubiquitous in plasmas. Current sheets are also the natural seedbed of plasma instabilities leading to wave generation. Among plasma instabilities, the current sheet kink instability causes the current sheet to distort and bend. Kink‐like distortions of the current sheet have been observed in a variety of plasmas, notably in the Earth's magnetotail (the region extending on the night side of the Earth's magnetosphere). While the kink instability and magnetic reconnection occur together in current sheets such as the magnetotail, their interaction is not well understood. We use a numerical simulation modeling the whole Earth's magnetosphere to investigate the interaction of the two processes in three dimensions. We find that as the kink waves grow, magnetic reconnection slows down, especially at locations where the current sheet is highly disturbed. Our findings suggest that the kink instability significantly affects magnetic reconnection. This study provides a deeper understanding of the intricate relationship between these two important phenomena. Key Points We investigate the interaction of magnetic reconnection and kink instability in a 3D global hybrid‐Vlasov simulation of near‐Earth space Magnetic reconnection is ongoing in the Earth's magnetotail during the growth and saturation phases of the kink instability The reconnection rate decreases during the instability growth phase, especially where the current sheet undergoes significant perturbation

Flux transfer events (FTEs) are transient magnetic flux ropes at Earth's dayside magnetopause formed due to magnetic reconnection. As they move across the magnetopause surface, they can generate disturbances in the ultralow frequency (ULF) range, which then propagate into the magnetosphere. This study provides evidence of ULF waves in the Pc2 wave frequency range (>0.1 Hz) caused by FTEs during dayside reconnection using a global 3D hybrid‐Vlasov simulation (Vlasiator). These waves resulted from FTE formation and propagation at the magnetopause are particularly associated with large, rapidly moving FTEs. The wave power is stronger in the morning than afternoon, showing local time asymmetry. In the pre and postnoon equatorial regions, significant poloidal and toroidal components are present alongside the compressional component. The noon sector, with fewer FTEs, has lower wave power and limited magnetospheric propagation. Plain Language Summary The Earth's magnetosphere is a dynamic region shaped by the interplay between the solar wind and Earth's magnetic field. This interaction occurs at the boundary of the magnetosphere (magnetopause) through a process known as magnetic reconnection, giving rise to Flux Transfer Events (FTEs), which are magnetic structures that carry flux and energy into the magnetosphere. These FTEs form either in sudden bursts, patchy patterns or in a continuous, and relatively stable way making the magnetopause surface dynamic. As the FTEs move along the boundary of the magnetosphere, they create compressed regions and lead to wave generation that can extend into the magnetosphere. The study uses an advanced 3D hybrid‐Vlasov simulation model to analyze waves originated from FTE formation and propagation at the magnetopause. We find that rapidly moving and large FTEs have a significant impact on the magnetopause, leading to the generation of ULF waves with frequency above 0.1 Hz. This shows first direct evidence supporting previous theoretical speculations regarding the ability of FTEs to generate waves near the magnetopause. Key Points Dayside Pc2 waves (>0.1 Hz) have been detected in a 3D hybrid‐Vlasov simulation These waves exhibit lower intensity within the magnetosphere at noon, compared to the prenoon and postnoon sectors Pc2 waves observed in the simulation are associated with largest and fast moving flux transfer events initiated by subsolar reconnection

BackgroundPatients with chronic inflammatory diseases (CID) have an increased risk for contracting infections. For patients with rheumatic diseases EULAR recommends protecting them from vaccine-preventable diseases.ObjectivesTo assess the knowledge and awareness of common vaccinations and extent of immunization among patients with CID in Denmark, Finland, Norway, Sweden (Nordics), and to identify gaps between the existing EULAR vaccination recommendations and current practice as experienced by patients.MethodsA structured anonymous online survey for patients with CID ((rheumatological disease (RD), inflammatory bowel disease (IBD) and dermatological diseases (DD)) was conducted in 2022.The survey was answered by 1748 respondents (1031 patients with RD, 543 with IBD and 563 with DD).ResultsAmong respondents, 89% were female and 58% had disease duration of above 10 years. In total, 56% were treated in specialised and 32% in primary care. Majority had ongoing systemic immunosuppressive treatment (IT) (65%). Majority of RD (59%) and IBD (66%) patients were treated in specialised care whereas minority of DD patients (38%) were treated in specialised care.Forty-nine percent (49%) responded that their healthcare professional (HCP) did not inform them about the increased risk of infection – however, 55% of the respondents believed they are somewhat or much more likely to suffer from infections than those without CID or treatment, 33% thought there is no difference and 13% did not know there is a difference.In total 68% of respondents considered it important to get vaccinated due to CID or IT. The number was particularly high in RD group (74%), although 63% stated they had not received any information regarding vaccinations at the start of their treatment.Commonly recommended vaccinations by the HCP were COVID 19 (66%), influenza (63%) and pneumococcal (45%) vaccination. When comparing respondents ≥65 and <65 years, there was a difference in how often the influenza (71% vs. 57%) and pneumococcal (57% vs. 38%), but not COVID 19 vaccination (68% vs. 65%), were recommended. In addition, 74% and 75% of respondents receiving IT were recommended influenza and COVID 19 vaccination, respectively.In total, 22% had their vaccination status checked before initiating treatment; the lowest percentage was in DD (16%) and the highest in RD (25%). However, 44% of respondents received influenza vaccination before initiation of treatment. Moreover, 62% and 74% of respondents received influenza and COVID 19 vaccination while on treatment, respectively.Eighty-six percent (86%) did not receive a vaccination plan in relation to their CID and treatment. Moreover, 64% of the respondents (RD 57%; DD 71% and IBD 66%) did not have vaccination status assessed on a regular basis. Forty-three percent (43%) were dissatisfied with the follow-up of vaccination status by their HCP. Respondents of age ≥65 years were more satisfied than the younger ones (34% vs. 25% very satisfied) and respondents with RD were more satisfied than those with IBD or DD (33% vs. 25% vs. 20%).Forty-four percent (44%) responded that the information on vaccinations related to their CID and treatment was difficult to find and 71% would like to receive more information.The respondents with RD had different level of awareness regarding EULAR vaccination recommendations. The degree of awareness among patients with RD treated with IT are presented in Figure 1.ConclusionThis Nordic survey provides insights on patients’ information needs, information sources and own experiences related to recommendations on vaccinations in relation to their CID and IT. The results confirm a gap between patients’ expectations and needs vs. the information they actually receive. Our findings demonstrate a need for increased awareness among patients, providers and HCP regarding EULAR vaccination recommendations in patients with RD.Reference[1]Furer V, et al. 2019 update of EULAR recommendations for vaccination in adult patients with autoimmune inflammatory rheumatic diseases. Ann Rheum Dis 2020;79:39–52.Acknowledgements:NIL.Disclosure of InterestsMeliha C Kapetanovic Grant/research support from: Received independent research grants from Roche and Pfizer, Randeep Mandla Shareholder of: Pfizer, Employee of: Current employee of Pfizer Norway, Maria Seddighzadeh Shareholder of: Pfizer, Employee of: Current employee of Pfizer Sweden, Susanne Thiesen Gren Shareholder of: Pfizer, Employee of: Current employee of Pfizer Denmark, Maaria Palmroth Consultant of: Employee of MedEngine Oy and contractor for Pfizer Oy, Employee of: Contractor for Pfizer Oy, Finland, Dan Henrohn Shareholder of: Pfizer, Employee of: Current employee of Pfizer AB, Sweden, Anne Grete Frostrup Shareholder of: Pfizer, Employee of: Current employee of Pfizer Denmark, Anna-Maria Hiltunen Consultant of: Pfizer. Employee of Nordic Healthcare Group, Jussi Ranta Consultant of: Pfizer. Employee of Nordic Healthcare Group, Anna-Kaisa Asikainen Consultant of: Pfizer. Employee of Nordic Healthcare Group, Veli-Jukka Anttila Speakers bureau: Lectures for Pfizer, MSD, Astellas, Roche, GSK, BMS, Biogen, Sandoz, Gilead, Unimedic Pharma, Boehringer-Ingelheim, Astra-Zeneca, Consultant of: Consultant for Pfizer and MSD.

The Universe is permeated by hot, turbulent, magnetized plasmas. Turbulent plasma is a major constituent of active galactic nuclei, supernova remnants, the intergalactic and interstellar medium, the solar corona, the solar wind and the Earth’s magnetosphere, just to mention a few examples. Energy dissipation of turbulent fluctuations plays a key role in plasma heating and energization, yet we still do not understand the underlying physical mechanisms involved. THOR is a mission designed to answer the questions of how turbulent plasma is heated and particles accelerated, how the dissipated energy is partitioned and how dissipation operates in different regimes of turbulence. THOR is a single-spacecraft mission with an orbit tuned to maximize data return from regions in near-Earth space – magnetosheath, shock, foreshock and pristine solar wind – featuring different kinds of turbulence. Here we summarize the THOR proposal submitted on 15 January 2015 to the ‘Call for a Medium-size mission opportunity in ESAs Science Programme for a launch in 2025 (M4)’. THOR has been selected by European Space Agency (ESA) for the study phase.

We use a global hybrid-Vlasov simulation for the magnetosphere, Vlasiator, to investigate magnetosheath high-speed jets. Unlike many other hybrid-kinetic simulations, Vlasiator includes an unscaled geomagnetic dipole, indicating that the simulation spatial and temporal dimensions can be given in SI units without scaling. Thus, for the first time, this allows investigating the magnetosheath jet properties and comparing them directly with the observed jets within the Earth's magnetosheath. In the run shown in this paper, the interplanetary magnetic field (IMF) cone angle is 30∘, and a foreshock develops upstream of the quasi-parallel magnetosheath. We visually detect a structure with high dynamic pressure propagating from the bow shock through the magnetosheath. The structure is confirmed as a jet using three different criteria, which have been adopted in previous observational studies. We compare these criteria against the simulation results. We find that the magnetosheath jet is an elongated structure extending earthward from the bow shock by ∼2.6 RE, while its size perpendicular to the direction of propagation is ∼0.5 RE. We also investigate the jet evolution and find that the jet originates due to the interaction of the bow shock with a high-dynamic-pressure structure that reproduces observational features associated with a short, large-amplitude magnetic structure (SLAMS). The simulation shows that magnetosheath jets can develop also under steady IMF, as inferred by observational studies. To our knowledge, this paper therefore shows the first global kinetic simulation of a magnetosheath jet, which is in accordance with three observational jet criteria and is caused by a SLAMS advecting towards the bow shock.

Background Bone morphogenetic protein 4 (BMP4) plays an important role in cancer pathogenesis. In breast cancer, it reduces proliferation and increases migration in a cell line-dependent manner. To characterize the transcriptional mediators of these phenotypes, we performed RNA-seq and DNase-seq analyses after BMP4 treatment in MDA-MB-231 and T-47D breast cancer cells that respond to BMP4 with enhanced migration and decreased cell growth, respectively. Results The RNA-seq data revealed gene expression changes that were consistent with the in vitro phenotypes of the cell lines, particularly in MDA-MB-231, where migration-related processes were enriched. These results were confirmed when enrichment of BMP4-induced open chromatin regions was analyzed. Interestingly, the chromatin in transcription start sites of differentially expressed genes was already open in unstimulated cells, thus enabling rapid recruitment of transcription factors to the promoters as a response to stimulation. Further analysis and functional validation identified MBD2, CBFB, and HIF1A as downstream regulators of BMP4 signaling. Silencing of these transcription factors revealed that MBD2 was a consistent activator of target genes in both cell lines, CBFB an activator in cells with reduced proliferation phenotype, and HIF1A a repressor in cells with induced migration phenotype. Conclusions Integrating RNA-seq and DNase-seq data showed that the phenotypic responses to BMP4 in breast cancer cell lines are reflected in transcriptomic and chromatin levels. We identified and experimentally validated downstream regulators of BMP4 signaling that relate to the different in vitro phenotypes and thus demonstrate that the downstream BMP4 response is regulated in a cell type-specific manner.

Most models of flux transfer event (FTE) formation produce pairs of structures which in general move away from the subsolar region and give rise to signatures which can be observed in both the Northern and Southern Hemispheres. The multiple reconnection line (X line) model is unusual as a reconnection‐based model that is capable of producing a single flux rope if only two X lines are present. Raeder (2006) reported the results of an MHD simulation where he studied the effect of the Earth's dipole tilt on reconnection at the dayside magnetopause for a southward IMF orientation; in his simulations, flux ropes were formed by the sequential formation of X lines, and when the dipole tilt was set to a value representative of solstice the flux ropes moved preferentially toward the winter hemisphere. Some observational evidence has previously been presented for a bias toward FTE signatures being observed in the winter hemisphere; in this paper, we present further observational evidence for this phenomenon, using an independently derived data set. Once the seasonal bias is taken into account, we find that the IMF clock angle controls the location of FTE signatures. We also find that the effective dipole tilt (combining the geomagnetic dipole tilt with the IMF tilt angle) provides no clear control of the location of FTE signatures. Key Points Confirmation of previous results suggesting a seasonal FTE dependence This suggests that FTEs are often formed by multiple X‐line reconnection When seasonal bias taken into account, clock angle orders FTE location well

Understanding the altitude distribution of particle precipitation forcing is vital for the assessment of its atmospheric and climate impacts. However, the proportion of electron and proton forcing around the mesopause region during solar proton events is not always clear due to uncertainties in satellite-based flux observations. Here we use electron concentration observations of the European Incoherent Scatter Scientific Association (EISCAT) incoherent scatter radars located at Tromsø (69.58° N, 19.23° E) to investigate the contribution of proton and electron precipitation to the changes taking place during two solar proton events. The EISCAT measurements are compared to the results from the Sodankylä Ion and Neutral Chemistry Model (SIC). The proton ionization rates are calculated by two different methods – a simple energy deposition calculation and the Atmospheric Ionization Model Osnabrück (AIMOS v1.2), the latter providing also the electron ionization rates. Our results show that in general the combination of AIMOS and SIC is able to reproduce the observed electron concentration within ± 50% when both electron and proton forcing is included. Electron contribution is dominant above 90 km, and can contribute significantly also in the upper mesosphere especially during low or moderate proton forcing. In the case of strong proton forcing, the AIMOS electron ionization rates seem to suffer from proton contamination of satellite-based flux data. This leads to overestimation of modelled electron concentrations by up to 90% between 75–90 km and up to 100–150% at 70–75 km. Above 90 km, the model bias varies significantly between the events. Although we cannot completely rule out EISCAT data issues, the difference is most likely a result of the spatio-temporal fine structure of electron precipitation during individual events that cannot be fully captured by sparse in situ flux (point) measurements, nor by the statistical AIMOS model which is based upon these observations.

This study describes the removal of polycyclic aromatic hydrocarbons (PAHs) from creosote oil contaminated soil by modified Fenton's reaction in laboratory-scale column experiments and subsequent aerobic biodegradation of PAHs by indigenous bacteria during incubation of the soil. The effect of hydrogen peroxide addition for 4 and 10 days and saturation of soil with H₂O₂ on was studied. In both experiments the H₂O₂ dosage was 0.4 g H₂O₂/g soil. In completely H₂O₂-saturated soil the removal of PAHs (44% within 4 days) by modified Fenton reaction was uniform over the entire soil column. In non-uniformly saturated soil, PAH removal was higher in completely saturated soil (52% in 10 days) compared to partially saturated soil, with only 25% in 10 days. The effect of the modified Fenton's reaction on the microbial activity in the soil was assessed based on toxicity tests towards Vibrio fischeri, enumeration of viable and dead cells, microbial extracellular enzyme activity, and oxygen consumption and carbon dioxide production during soil incubation. During the laboratory-scale column experiments, the toxicity of column leachate towards Vibrio fischeri increased as a result of the modified Fenton's reaction. The activities of the microbial extracellular enzymes acetate- and acidic phosphomono-esterase were lower in the incubated modified Fenton's treated soil compared to extracellular enzyme activities in untreated soil. Abundance of viable cells was lower in incubated modified Fenton treated soil than in untreated soil. Incubation of soil in serum bottles at 20 °C resulted in consumption of oxygen and formation of carbon dioxide, indicating aerobic biodegradation of organic compounds. In untreated soil 20-30% of the PAHs were biodegraded during 2 months of incubation. Incubation of chemically treated soil slightly increased PAH-removal compared to PAH-removal in untreated soil.