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The AA. analyse the relation between sediment yield (SY) and seismic activity, a component of tectonic processes. Results show a spatial correlation between SY and seismic activity expressed as the estimated peak ground acceleration (PGA) with a 10
% exceedance probability in 50 years. PGA has a significant impact on the spatial variation of SY, even after correcting for cross-correlations with topography, lithology or other factors that may influence SY. Based on 3 distinct data sets, the AA. demonstrate
that this effect is significant both for small catchments in Europe and for large river systems worldwide and that seismic activity may be even more important for explaining regional variation in SY than land use or many other commonly considered factors (e.g
. catchment area, climate). It is shown that explicitly considering seismic activity may lead to SY-estimates that easily deviate a factor 2 or more compared to estimates that do not consider seismic activity.

This study reviews area-specific sediment yield (SY) from badlands in the Mediterranean measured at different spatial scales, using various measuring techniques, in order to investigate the relationship between size of study area (A) and SY
. A database representing 16 571 plot-year and catchment-year data on SY at 87 Mediterranean study sites was compiled. The most commonly reported lithologies associated with badlands are marls, clay rocks and mudstones, and to a lesser extent shales. A high
variability of SY from badlands in the Mediterranean region is observed. No significant relationships between SY, lithology, and mean air temperature nor mean annual precipitation were observed.

La variabilité saisonnière de l'étendue des surfaces enneigées est un paramètre essentiel du sys¬tème climatique mondial, en raison de ses effets sur la température de surface, ainsi que sur les bilans d'énergie et d'humidité. Inversement

a preference for policies that rely on changes in individual behavior, economic incentives, and federal inaction on local government justification for climate-related policies. It concludes with a discussion of urban climate governance as part of a wider sys

Les AA. analysent l’organisation spatiale de l’industrie pétrochimique chimique et proposent un sys-tème d’indices comprenant quatre principales catégories et onze indicateurs. Pour ce faire, ils choisissent le niveau administratif des préfectures

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