[1] The Charlevoix seismic zone in the St. Lawrence valley of Quebec is the most active in eastern Canada. The structurally complex region comprises a series of subparallel steeply dipping Iapetan rift faults, superimposed by a 350 Ma meteorite impact structure, resulti...

[1] We present an experimental and theoretical study of whether a large displacement wave can lead to catastrophic erosional incision of a moraine damming a glacial lake. The laboratory experiments consist of reservoirs held by barriers of granular materials in a glass ...

Macronutrients persist in the surface layer of the equatorial Pacific because the production of phytoplankton is limited; the nature of this limitation has yet to be resolved. Measurements of photosynthesis as a function of irradiance (P-I) provide information on the co...

International audience; Aircraft measurements of the power spectra of the horizontal wind field typically find a transition from approximate to k(-5/3) to approximate to k(-2.4) at scales somewhere around 40 km (k is a wave number). In the usual interpretation this repr...

[1] In situ surface pressures measured at 2 s intervals during the 150 sol Phoenix mission are presented and seasonal variations discussed. The lightweight Barocap®/Thermocap® pressure sensor system performed moderately well. However, the original data processing routin...

[1] Extensive moored current meters, atmospheric observations, and hydrographic surveys were obtained off central California during the 1997–1998 El Nino. In this study the temperature observations from current meter moorings and hydrographic surveys are assimilated int...

[1] Elevated pore pressure can lead to reactivation of slip on pre-existing fractures and faults when the static Coulomb failure is reached locally. As the pressurized region spreads diffusively, slip can accumulate quasi-statically (paced by the pore fluid diffusion) o...

[1] Supersonic neutral velocities, called supersonic bursts, are observed in localized regions lasting for over 8 s of enhanced O(1S) emission rate for tangent altitudes of 73–80 km during summer daytime by the Wind Imaging Interferometer (WINDII) on board the UARS sate...

[1] The physics of the interaction of bursty bulk flows (BBFs) with the near-Earth plasma is not yet known in detail. We address this issue with comprehensive observations made with the MIRACLE network during a well-documented streamer event. In this case an equatorward...

International audience The dispersion and mixing of pollutant plumes during long-range transport across the North Atlantic is studied using ensembles of diffusive backward trajectories in order to estimate turbulent diffusivity coefficients in the free troposphere under...