Climate data: Exposure conditions in Europe

Hannu Viitanen, Tommi Toratti, Lasse Makkonen, Ruut Pehkuri, Tuomo Ojanen, Sven Thelandersson, Tord Isaksson, Eva Frühwald Hansson

    Research output: Book/ReportReport

    Abstract

    Ambient microclimatic conditions, especially moisture conditions, are the most important factors for durability of wood. The classification of use conditions in WP1 (climate data) of the project Woodexter is based on the evaluation of the water exposure during the use. Decay is the more severe result of high moisture exposure of wooden structures when the materials are wet for long periods. For generating critical humidity and temperature conditions needed for start of decay, a model based on the previous studies at VTT was developed. For evaluation the climatic exposure conditions, the empirical wood decay model were first used for the ERA-40 data for air temperature, humidity and precipitation at 6 hour intervals. ERA-40 is a massive data archive produced by the European Centre of Medium-Range Weather Forecasts (ECMWF). The ERA-40 domain covers all of Europe and has a grid spacing of approximately 270 km. The decay index mapping for Europe with respect to macro-climate was developed. The results will give inputs to WP 4 (service life) to evaluate the effect of macroclimate as classified factors to be used for service life evaluation and engineering model. The inputs to modelling were in first step general, and the local conditions have been more detailed. Different climatic exposure areas or zones could be detected: Northern European (north and south), Continental, Atlantic (north, middle and south), Mediterranean zone (wet and dry). The classifying will give a relative values for decay risks in different part of Europe. The exposure of horizontal exterior surfaces to solar radiation of Europe was simulated using the average solar radiation values (GW/m2s) of 30 years' period. The solar radiation is lowest in North Europe even the days during summer time are longer. The highest solar radiation was found in the Southern Europe. In the second stage, a dose response model was used to evaluate the climate conditions in selected places in Europe in the WP4 (Service life model).
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages47
    ISBN (Electronic)978-951-38-7523-7
    Publication statusPublished - 2011
    MoE publication typeNot Eligible

    Publication series

    SeriesVTT Working Papers
    Number181

    Fingerprint

    climate
    solar radiation
    humidity
    moisture
    exposure
    Europe
    climate conditions
    durability
    spacing
    air temperature
    weather
    engineering
    summer
    modeling
    services
    evaluation
    temperature
    water

    Keywords

    • climate
    • exposure
    • wood
    • durability
    • service life
    • modelling

    Cite this

    Viitanen, H., Toratti, T., Makkonen, L., Pehkuri, R., Ojanen, T., Thelandersson, S., ... Frühwald Hansson, E. (2011). Climate data: Exposure conditions in Europe. Espoo: VTT Technical Research Centre of Finland. VTT Working Papers, No. 181
    Viitanen, Hannu ; Toratti, Tommi ; Makkonen, Lasse ; Pehkuri, Ruut ; Ojanen, Tuomo ; Thelandersson, Sven ; Isaksson, Tord ; Frühwald Hansson, Eva. / Climate data : Exposure conditions in Europe. Espoo : VTT Technical Research Centre of Finland, 2011. 47 p. (VTT Working Papers; No. 181).
    @book{f243fb509d5241ad97535528417035e3,
    title = "Climate data: Exposure conditions in Europe",
    abstract = "Ambient microclimatic conditions, especially moisture conditions, are the most important factors for durability of wood. The classification of use conditions in WP1 (climate data) of the project Woodexter is based on the evaluation of the water exposure during the use. Decay is the more severe result of high moisture exposure of wooden structures when the materials are wet for long periods. For generating critical humidity and temperature conditions needed for start of decay, a model based on the previous studies at VTT was developed. For evaluation the climatic exposure conditions, the empirical wood decay model were first used for the ERA-40 data for air temperature, humidity and precipitation at 6 hour intervals. ERA-40 is a massive data archive produced by the European Centre of Medium-Range Weather Forecasts (ECMWF). The ERA-40 domain covers all of Europe and has a grid spacing of approximately 270 km. The decay index mapping for Europe with respect to macro-climate was developed. The results will give inputs to WP 4 (service life) to evaluate the effect of macroclimate as classified factors to be used for service life evaluation and engineering model. The inputs to modelling were in first step general, and the local conditions have been more detailed. Different climatic exposure areas or zones could be detected: Northern European (north and south), Continental, Atlantic (north, middle and south), Mediterranean zone (wet and dry). The classifying will give a relative values for decay risks in different part of Europe. The exposure of horizontal exterior surfaces to solar radiation of Europe was simulated using the average solar radiation values (GW/m2s) of 30 years' period. The solar radiation is lowest in North Europe even the days during summer time are longer. The highest solar radiation was found in the Southern Europe. In the second stage, a dose response model was used to evaluate the climate conditions in selected places in Europe in the WP4 (Service life model).",
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    author = "Hannu Viitanen and Tommi Toratti and Lasse Makkonen and Ruut Pehkuri and Tuomo Ojanen and Sven Thelandersson and Tord Isaksson and {Fr{\"u}hwald Hansson}, Eva",
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    Viitanen, H, Toratti, T, Makkonen, L, Pehkuri, R, Ojanen, T, Thelandersson, S, Isaksson, T & Frühwald Hansson, E 2011, Climate data: Exposure conditions in Europe. VTT Working Papers, no. 181, VTT Technical Research Centre of Finland, Espoo.

    Climate data : Exposure conditions in Europe. / Viitanen, Hannu; Toratti, Tommi; Makkonen, Lasse; Pehkuri, Ruut; Ojanen, Tuomo; Thelandersson, Sven; Isaksson, Tord; Frühwald Hansson, Eva.

    Espoo : VTT Technical Research Centre of Finland, 2011. 47 p. (VTT Working Papers; No. 181).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - Climate data

    T2 - Exposure conditions in Europe

    AU - Viitanen, Hannu

    AU - Toratti, Tommi

    AU - Makkonen, Lasse

    AU - Pehkuri, Ruut

    AU - Ojanen, Tuomo

    AU - Thelandersson, Sven

    AU - Isaksson, Tord

    AU - Frühwald Hansson, Eva

    PY - 2011

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    N2 - Ambient microclimatic conditions, especially moisture conditions, are the most important factors for durability of wood. The classification of use conditions in WP1 (climate data) of the project Woodexter is based on the evaluation of the water exposure during the use. Decay is the more severe result of high moisture exposure of wooden structures when the materials are wet for long periods. For generating critical humidity and temperature conditions needed for start of decay, a model based on the previous studies at VTT was developed. For evaluation the climatic exposure conditions, the empirical wood decay model were first used for the ERA-40 data for air temperature, humidity and precipitation at 6 hour intervals. ERA-40 is a massive data archive produced by the European Centre of Medium-Range Weather Forecasts (ECMWF). The ERA-40 domain covers all of Europe and has a grid spacing of approximately 270 km. The decay index mapping for Europe with respect to macro-climate was developed. The results will give inputs to WP 4 (service life) to evaluate the effect of macroclimate as classified factors to be used for service life evaluation and engineering model. The inputs to modelling were in first step general, and the local conditions have been more detailed. Different climatic exposure areas or zones could be detected: Northern European (north and south), Continental, Atlantic (north, middle and south), Mediterranean zone (wet and dry). The classifying will give a relative values for decay risks in different part of Europe. The exposure of horizontal exterior surfaces to solar radiation of Europe was simulated using the average solar radiation values (GW/m2s) of 30 years' period. The solar radiation is lowest in North Europe even the days during summer time are longer. The highest solar radiation was found in the Southern Europe. In the second stage, a dose response model was used to evaluate the climate conditions in selected places in Europe in the WP4 (Service life model).

    AB - Ambient microclimatic conditions, especially moisture conditions, are the most important factors for durability of wood. The classification of use conditions in WP1 (climate data) of the project Woodexter is based on the evaluation of the water exposure during the use. Decay is the more severe result of high moisture exposure of wooden structures when the materials are wet for long periods. For generating critical humidity and temperature conditions needed for start of decay, a model based on the previous studies at VTT was developed. For evaluation the climatic exposure conditions, the empirical wood decay model were first used for the ERA-40 data for air temperature, humidity and precipitation at 6 hour intervals. ERA-40 is a massive data archive produced by the European Centre of Medium-Range Weather Forecasts (ECMWF). The ERA-40 domain covers all of Europe and has a grid spacing of approximately 270 km. The decay index mapping for Europe with respect to macro-climate was developed. The results will give inputs to WP 4 (service life) to evaluate the effect of macroclimate as classified factors to be used for service life evaluation and engineering model. The inputs to modelling were in first step general, and the local conditions have been more detailed. Different climatic exposure areas or zones could be detected: Northern European (north and south), Continental, Atlantic (north, middle and south), Mediterranean zone (wet and dry). The classifying will give a relative values for decay risks in different part of Europe. The exposure of horizontal exterior surfaces to solar radiation of Europe was simulated using the average solar radiation values (GW/m2s) of 30 years' period. The solar radiation is lowest in North Europe even the days during summer time are longer. The highest solar radiation was found in the Southern Europe. In the second stage, a dose response model was used to evaluate the climate conditions in selected places in Europe in the WP4 (Service life model).

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    KW - exposure

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    KW - durability

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    KW - modelling

    M3 - Report

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    Viitanen H, Toratti T, Makkonen L, Pehkuri R, Ojanen T, Thelandersson S et al. Climate data: Exposure conditions in Europe. Espoo: VTT Technical Research Centre of Finland, 2011. 47 p. (VTT Working Papers; No. 181).