76 research outputs found

    The worldwide C3S CORDEX grand ensemble: A major contribution to assess regional climate change in the IPCC AR6 Atlas

    Get PDF
    peer reviewedAbstract The collaboration between the Coordinated Regional Climate Downscaling Experiment (CORDEX) and the Earth System Grid Federation (ESGF) provides open access to an unprecedented ensemble of Regional Climate Model (RCM) simulations, across the 14 CORDEX continental-scale domains, with global coverage. These simulations have been used as a new line of evidence to assess regional climate projections in the latest contribution of the Working Group I (WGI) to the IPCC Sixth Assessment Report (AR6), particularly in the regional chapters and the Atlas. Here, we present the work done in the framework of the Copernicus Climate Change Service (C3S) to assemble a consistent worldwide CORDEX grand ensemble, aligned with the deadlines and activities of IPCC AR6. This work addressed the uneven and heterogeneous availability of CORDEX ESGF data by supporting publication in CORDEX domains with few archived simulations and performing quality control. It also addressed the lack of comprehensive documentation by compiling information from all contributing regional models, allowing for an informed use of data. In addition to presenting the worldwide CORDEX dataset, we assess here its consistency for precipitation and temperature by comparing climate change signals in regions with overlapping CORDEX domains, obtaining overall coincident regional climate change signals. The C3S CORDEX dataset has been used for the assessment of regional climate change in the IPCC AR6 (and for the interactive Atlas) and is available through the Copernicus Climate Data Store (CDS)

    Undersökning av relationen mellan stegljudsnivÄ och vibrationer : En forskningsstudie i samarbete med Derome Hus AB och Acouwood AB

    No full text
    Impact sound can be caused, for example, by children jumping and playing or by other types of mechanical contact with the structure. Insufficient impact sound insulation in lightweight timber structures is a recurring issue and is of great importance for the overall quality assessment of residential buildings. Impact sound is a complex topic that, together with a lack of understanding in the industry, often results in contractors building first and testing later. This methodology often leads to costly measures at the end of the construction process.  In recent years, much research has been conducted to investigate the impact sound problem in lightweight timber structures, but few studies have focused on the relationship between impact sound level and vibration, which is investigated in this study. Through field measurements of impact sound and vibration in three different buildings, information was expected to be obtained on how the design of floors and joints can affect the impact sound insulation. The purpose of obtaining this information was to simplify the evaluation of buildings' final construction. A conclusion that can be drawn from the study is that insufficient impact sound insulation is expected to be due to lower damping in the joints. With greater damping in the joints, the evaluation of the final design can be simplified, as the transmission paths are limited to mainly through the floor.Stegljud kan uppstÄ genom barns hopp och lek eller vid annan typ avmekanisk kontakt med stommen. Bristande stegljudsisolering i lÀttatrÀkonstruktioner Àr ett Äterkommande problem och Àr av stor betydelse förden totala kvalitetsbedömningen av bostÀder. Stegljudsproblematik Àr ettkomplext Àmne som tillsammans med en bristande förstÄelse i branschen,ofta resulterar i att entreprenörer bygger först och testar senare. Dennametodik leder inte sÀllan till kostsamma ÄtgÀrder i byggprocessensslutskede.Under senare Är har mycket forskning bedrivits i syfte att utredastegljudsproblematiken i lÀtta trÀkonstruktioner, men fÄ studier har fokuseratpÄ relationen mellan stegljudsnivÄ och vibrationer, som undersöks i dennastudie. Genom fÀltmÀtningar av stegljud och vibrationer i tre olikabyggnader, förvÀntades information erhÄllas kring hur utformning avbjÀlklag och knutpunkter kan pÄverka stegljudsisoleringen. Syftet med attinhÀmta denna information var att förenkla vÀrderingen av byggnadersslutgiltiga konstruktion.En slutsats som kan dras frÄn studien Àr att bristande stegljudsisoleringförvÀntas bero pÄ lÀgre dÀmpning i knutpunkterna. Med större dÀmpning iknutpunkterna kan vÀrderingen av slutlig konstruktion förenklas, detta dÄtransmissionsvÀgarna begrÀnsas till i huvudsak genom bjÀlklaget

    Undersökning av relationen mellan stegljudsnivÄ och vibrationer : En forskningsstudie i samarbete med Derome Hus AB och Acouwood AB

    No full text
    Impact sound can be caused, for example, by children jumping and playing or by other types of mechanical contact with the structure. Insufficient impact sound insulation in lightweight timber structures is a recurring issue and is of great importance for the overall quality assessment of residential buildings. Impact sound is a complex topic that, together with a lack of understanding in the industry, often results in contractors building first and testing later. This methodology often leads to costly measures at the end of the construction process.  In recent years, much research has been conducted to investigate the impact sound problem in lightweight timber structures, but few studies have focused on the relationship between impact sound level and vibration, which is investigated in this study. Through field measurements of impact sound and vibration in three different buildings, information was expected to be obtained on how the design of floors and joints can affect the impact sound insulation. The purpose of obtaining this information was to simplify the evaluation of buildings' final construction. A conclusion that can be drawn from the study is that insufficient impact sound insulation is expected to be due to lower damping in the joints. With greater damping in the joints, the evaluation of the final design can be simplified, as the transmission paths are limited to mainly through the floor.Stegljud kan uppstÄ genom barns hopp och lek eller vid annan typ avmekanisk kontakt med stommen. Bristande stegljudsisolering i lÀttatrÀkonstruktioner Àr ett Äterkommande problem och Àr av stor betydelse förden totala kvalitetsbedömningen av bostÀder. Stegljudsproblematik Àr ettkomplext Àmne som tillsammans med en bristande förstÄelse i branschen,ofta resulterar i att entreprenörer bygger först och testar senare. Dennametodik leder inte sÀllan till kostsamma ÄtgÀrder i byggprocessensslutskede.Under senare Är har mycket forskning bedrivits i syfte att utredastegljudsproblematiken i lÀtta trÀkonstruktioner, men fÄ studier har fokuseratpÄ relationen mellan stegljudsnivÄ och vibrationer, som undersöks i dennastudie. Genom fÀltmÀtningar av stegljud och vibrationer i tre olikabyggnader, förvÀntades information erhÄllas kring hur utformning avbjÀlklag och knutpunkter kan pÄverka stegljudsisoleringen. Syftet med attinhÀmta denna information var att förenkla vÀrderingen av byggnadersslutgiltiga konstruktion.En slutsats som kan dras frÄn studien Àr att bristande stegljudsisoleringförvÀntas bero pÄ lÀgre dÀmpning i knutpunkterna. Med större dÀmpning iknutpunkterna kan vÀrderingen av slutlig konstruktion förenklas, detta dÄtransmissionsvÀgarna begrÀnsas till i huvudsak genom bjÀlklaget
    • 

    corecore