@article{fdi:010066994,
  title = {{I}nfluence of meteorological factors on rockfall occurrence in a middle mountain limestone cliff},
  author = {{D}'{A}mato, {J}. and {H}antz, {D}. and {G}uerin, {A}. and {J}aboyedoff, {M}. and {B}aillet, {L}. and {M}ariscal, {A}rmand},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he influence of meteorological conditions on rockfall occurrence has been often highlighted, but knowledge of it is still not sufficient due to the lack of exhaustive and precise rockfall databases. {I}n this study, rockfalls have been detected in a limestone cliff by annual terrestrial laser scanning, and dated by photographic survey over a period of 2.5 years. {A} near-continuous survey (one photo every 10 min) with a wide-angle lens has made it possible to date 214 rockfalls larger than 0.1 m(3), and a monthly survey with a telephoto lens has dated 854 rockfalls larger than 0.01 m(3). {A}nalysis of the two databases shows that the rockfall frequency can be multiplied by a factor as high as 7 during freeze-thaw episodes and 26 when the mean rainfall intensity (since the beginning of the rainfall episode) is higher than 5 mm h(-1). {B}ased on these results, a three-level scale has been proposed for predicting the temporal variations of rockfall frequency. {T}he more precise database and freeze-thaw episode definition make it possible to distinguish different phases in freeze-thaw episodes: negative temperature cooling periods, negative temperature warming periods and thawing periods. {I}t appears that rockfalls occur more frequently during warming and thawing periods than during cooling periods. {I}t can be inferred that rockfalls are caused by thermal ice dilatation rather than by dilatation due to the phase transition. {B}ut they may occur only when the ice melts, because the cohesion of the ice-rock interface can be sufficient to hold the rock compartment which has been cut.},
  keywords = {{FRANCE} ; {ALPES}},
  booktitle = {},
  journal = {{N}atural {H}azards and {E}arth {S}ystem {S}ciences},
  volume = {16},
  numero = {3},
  pages = {719--735},
  ISSN = {1561-8633},
  year = {2016},
  DOI = {10.5194/nhess-16-719-2016},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066994},
}