Critical assessment of the 2°C min−1 threshold for thermal stress weathering
2013 (English)In: Geografiska Annaler. Series A, Physical Geography, ISSN 0435-3676, E-ISSN 1468-0459, Vol. 95, no 4, 285-293 p.Article in journal (Refereed) Published
Rock surface temperature changes in excess of 2°C min−1 have been argued to result in permanent strain in rock. The single threshold value and the supposed importance of a rate of 2°C min−1 rock temperature change is rejected, based on lack of a sufficient empirical basis, contrasting results from acoustic emission studies, varying strength properties of different rock types, lack of data on actual strain resulting from short-term temperature variations, and lack of notable long-term weathering effects in Nordic environments. Based on the presented discussion, the role of thermal shock weathering in cold regions is questioned and renewed emphasis is placed on the importance of absolute temperature and measurement of strain, as well as spatial temperature gradients.
Place, publisher, year, edition, pages
2013. Vol. 95, no 4, 285-293 p.
thermal stress, weathering
Research subject Earth Science with specialization in Physical Geography
IdentifiersURN: urn:nbn:se:uu:diva-208839DOI: 10.1111/geoa.12026ISI: 000327553200003OAI: oai:DiVA.org:uu-208839DiVA: diva2:654859