Diurnal valley winds frequently form over complex topography, particularly under fair weather conditions, and have a significant impact on the local weather and climate. Since diurnal valley winds result from complex and multi-scale interactions, their representation in numerical weather prediction models is challenging. Better understanding of these local winds based on observations is crucial to improve the accuracy of the forecasts. This study investigates the diurnal evolution of the three-dimensional mean wind structure in a deep Alpine valley, the Rhone valley at Sion, using data from a radar wind profiler and a surface weather station operated continuously from 1 September 2016 to 17 July 2017. In particular, the wind profiler data was analyzed for a subset of days on which fair weather conditions allowed for the full development of thermally driven winds. A pronounced diurnal cycle of the wind speed, as well as a reversal of the wind direction twice per day is documented for altitudes up to about 2 km above ground level (AGL) in the warm season and less than 1 km AGL in winter. The diurnal pattern undergoes significant changes during the course of the year. Particularly during the warm-weather months of May through to September, a low-level wind maximum occurs, where mean maximum up-valley velocities of 8–10 m s−1 are found between 15–16 UTC at altitudes around 200 m AGL. In addition, during nighttime, a down-valley jet with maximum wind speeds of 4–8 m s−1 around 1 km AGL is found. A case study of a three-day period in September 2016 illustrates the occurrence of an elevated layer of cross-valley flow around 1–1.5 km AGL.

Multiple sclerosis (MS) is a chronic, inflammatory autoimmune disease of the central nervous system mainly of adults ranging from 20 to 45 years of age. The risk of developing MS is 50% higher in women than in men. Most people with MS (PwMS) experience a spectrum of symptoms such as spasticity, continence dysfunctions, fatigue, or neurobehavioral manifestations. Due to the complexity of MS and the variety of patient-centered needs, a comprehensive approach of interprofessional collaboration (IPC) of multiple health care professionals (HCP) is necessary. The aim of this qualitative study was to explore the meaning of IPC in the comprehensive care of PwMS from a HCP perspective. Focus groups (FG) with HCP were conducted, recorded, and transcribed verbatim. The sample contained HCP from three MS clinics in different phases of care and rehabilitation. Four main categories emerged: (a) experience with IPC, (b) relevant aspects for IPC in patients’ treatment, (c) differences in in- and outpatient settings, and (d) influence of patient perspective. IPC plays a crucial role in HCP perspective when treating PwMS, which can benefit from an IPC therapeutic approach because HCP work together in a patient-centered way. The inpatient setting of HCP strongly supports the implementation of IPC. This prerequisite does not exist in outpatient settings.

AimsPsychological distress due to living with diabetes, demanding self-management tasks, impacts on life, and risks of complications is common among people living with diabetes. COVID-19 could pose a new additional risk factor for psychological distress in this group. This study aimed to analyze levels of COVID-19-related burdens and fears, variables explaining these levels, and associations with the concurrent 7-day COVID-19 incidence in people with type 1 diabetes (T1D).MethodsA total of 113 people with T1D (58% women; age: 42.3 ± 9.9 years) participated in an ecological momentary assessment (EMA) study between December 2020 and March 2021. The participants reported daily levels of COVID-19-related burdens and fears over 10 consecutive days. Global ratings of COVID-19-related burdens and fears were assessed using questionnaires, as were current and previous levels of diabetes distress (PAID), acceptance (DAS), fear of complications (FCQ), depressive symptoms (CES-D), and diabetes self-management (DSMQ). Current levels of diabetes distress and depressive symptoms were compared with pre-pandemic ratings gained during an earlier study phase. Associations between burdens and fears, psychosocial and somatic aspects, and the concurrent 7-day incidence rate were analyzed using multilevel regression.ResultsDiabetes distress and depressive symptoms reported during the pandemic were comparable to pre-pandemic levels (PAID: p = .89; CES-D: p = .38). Daily EMA ratings reflected relatively low mean COVID-19-related burdens and fears in everyday life. However, there was substantial day-to-day variation per person indicating higher burdens on specific days. Multilevel analyses showed that daily COVID-19-related burdens and fears were significantly predicted by pre-pandemic levels of diabetes distress and diabetes acceptance but were not associated with the concurrent 7-day incidence rate nor with demographic and medical variables.ConclusionsThis study observed no increase in diabetes distress and depressive symptoms during the pandemic in people with T1D. The participants reported low to moderate levels of COVID-19-related burdens. COVID-19-related burdens and fears could be explained by pre-pandemic levels of diabetes distress and acceptance but not by demographic and clinical risk variables. The findings suggest that mental factors may constitute stronger predictors of COVID-19-related burdens and fears than objective somatic conditions and risks in middle-aged adults with T1D.

<p>The differentially heated rotating annulus is a classic experiment used for the examination of circulation patterns and waves in the atmosphere. In particular, by choosing an atmosphere-like experimental setup that allows the buoyancy frequency to become larger than the Coriolis parameter, it provides a useful tool to study the generation mechanism of spontaneous gravity wave (GW) emission in jet-front systems. Recently, with the aim to gain better understanding about the conditions for the spontaneous generation of GWs, Rodda et al. (2020) compared experimental data with results from numerical simulations and found differences in the GW signal most likely due to the model's treatment of boundary conditions. The aim of the present study is to improve the consistency between the model and experiment and to investigate the effect of the lateral and upper boundary conditions on GW generation and propagation in an atmosphere-like configuration of the annulus. More precisely, we implement the corresponding lateral and surface heat fluxes, air-temperature variations, as well as evaporation at the upper boundary condition into the numerical model and examine the characteristics of the observed GW signals, which are identified by the horizontal divergence field. Our systematic analysis may serve as a basis for subsequent research on the spontaneous GW generation mechanism, following the overarching objective to develop a parameterization scheme for GWs emitted from jets and front.</p><p> </p><p><strong>References:</strong></p><p>Rodda, C., S. Hien, U. Achatz, and U. Harlander, 2020: A new atmospheric-like differentially heated rotating annulus configuration to study gravity wave emission from jets and fronts. Exp. Fluids <strong>61, </strong>2. https://doi.org/10.1007/s00348-019-2825-z</p>

Atmosphärische Schwerewellen spielen eine wichtige Rolle für die Zirkulation der mittleren Atmosphäre, die wiederum die Troposphäre auf saisonalen und längeren Zeitskalen beeinflusst, und stellen somit ein Schlüsselelement für das Wetter- und Klimageschehen dar. Eine adäquate Beschreibung des Lebenszyklus atmosphärischer Schwerewellen in den operationellen Modellen zur Wettervorhersage und Klimasimulation ist daher sehr wünschenswert. Um zu einer verbesserten mathematischen Darstellung der Schwerewellendynamik in den Modellen beizutragen, wurden in den vergangenen Jahren zahlreiche numerische Studien durchgeführt. Wenngleich auch viele der ablaufenden Prozesse gegenwärtig gut verstanden sind, stellt die Wechselwirkung zwischen den mesoskaligen Schwerewellen und den synoptischskaligen Prozessen aufgrund der hohen Komplexität der Strömung weiterhin eine besondere Herausforderung für die Erforschung der Schwerewellenaktivität dar und erfordert oftmals hochaufgelöste numerische Simulationen über große Modelldomänen. Folglich ist es wichtig, dass die angewendeten numerischen Verfahren effizient sind und möglichst idealisierte, aber dennoch atmosphärenähnliche Szenarien simulieren. In dieser Arbeit wird ein effizientes numerisches Verfahren zur Modellierung der Dynamik interner Schwerewellen sowie deren Einfluss auf die Zirkulation der mittleren Atmosphäre entwickelt. Dabei wird die Diskretisierung des pseudo-inkompressiblen Finite-Volumen-Modells auf einem versetzten Gitter von Rieper et al. (2013), welches der Einfachheit halber Schallwellen aus der Dynamik herausfiltert und zur Untersuchung adiabatischer Atmosphärenprozesse auf der f-Ebene entwickelt wurde, im wesentlichen durch zwei Komponenten erweitert: 1) die Anwendung eines semi-impliziten Zeitschrittverfahrens auf die Bewegungsgleichungen zur Integration der Auftriebs- und Corioliseffekte und 2) die Berücksichtigung einer Heizung durch einen thermischen Relaxationsansatz, welcher in der Troposphäre ein baroklin instabiles Strömungsprofil erzeugt und eine zeitabhängige Dynamik des Hintergrundzustands zulässt. Zur Überprüfung der korrekten Implementierung der Erweiterungen werden eine Reihe von atmosphärischen Standardteststudien durchgeführt, welche die Konvergenzeigenschaften sowie die Effizienz des Verfahrens validieren. Darüber hinaus zeigen die Testfälle, dass die Ergebnisse des Modells mit anderen veröffentlichten Arbeiten sehr gut übereinstimmen. Schließlich wird als Anwendungstestfall eine mesoskalige Simulation barokliner Instabilität in der Troposphäre durchgeführt, welche ferner die darin enthaltene kleinskalige Wellenaktivität sowie deren Einfluss auf die mittlere Atmosphäre modelliert. Die abschließende Betrachung der zonal und zeitlich gemittelten Felder zeigt die erwartete Zonalwindumkehr in der Höhe.