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Table 6 Summary of expected outcomes for microbiological activity for period 2012–2101

From: The design of a legacy indicator tool for measuring climate change related impacts on built heritage


Near future (to 2020)

 Colour change was found on a sample of cubes measured after 1 year exposure, indicating algal growth. Sandstone exhibited highest colonization as did north facing surfaces. In N. Ireland lichens on rural samples were noted by end of second year [43]

Medium term (to 2050)

 Weathering will make less porous rocks vulnerable to colonization. North facing surfaces should continue to experience most rapid growth. With increased temperature and precipitation, the rate of microbiological growth is likely to increase during winter/autumn

Far future (to 2101)

 Growth may continue with higher level species, and/or a change in the colour of microbiological growth may occur, indicating an altering profile of species. Future levels of atmospheric NOx will contribute to this effect—comparison between case studies will help to account for this