Initiation and development of a hail storm on the north of the Black Forest on 15 July 2007

A hail storm on the north of the Black Forest

Convection starts sporadically on the mountain ridges in response to daytime heating, then organizes in a single cell storm in the lee of the Feldberg before spreading to the northeast. The shaded volume materializes the precipitation area that reached 14 km altitude. The blue area corresponds to the anvil of the storm system. It is composed of fine particles of ice, which are driven eastward by the action of winds aloft. Meso-NH simulation at 500 m horizontal resolution. View from the southwest. See also some animations availble on the supplement of the Schmidt et al. ACP 2012 paper.

Representation of the sulfur plume from the eruption of April 2007 in La RĂ©union (Piton de la Fournaise)

http://www.dailymotion.com/video/xxnbvs_couplage-forefire-mesonh-reunion-02-2013_tech#.USWg5H0Ro5Z

A 10-h simulation coupling Meso-NH and !ForeFire/Lava results from a collaboration between LACy, SPE and OVPF. The grid spacing is 250 m for Meso-NH and 25 m for ForeFire. The animation shows the gravity flow of lava (yellow dots represent the front of wash propagative) and the resulting gaseous emissions (concentration in color). Arrows are winds from Meso-NH. The plume (here a tracer) is transported mainly by convection forced by the strong sensible heat flux emitted by the lava. In the middle of animation, there is a strengthening of convection due to an increase in the flow of lava. This building is also the result of a positive feedback due to the strengthening of surface winds (in conjunction with convection) that increase the sensible heat flux. Download the animation: mm.mp4 (120 Mo).

Hydration of the stratosphere by Hector the convector on the Tiwi Islands (Australia)

A 5-h Meso-NH simulation of Hector the convector, which form nearly every afternoon during the early and late wet season months on the Tiwi Islands north of Darwin in the Northern Territory Australia. The simulation run with a 200-m grid spacing on Turing, the CNRS/IDRIS Blue Gene/Q using 8192 cores.

Hector the convector

A 10-h Meso-NH simulation of Hector the convector, which form nearly every afternoon during the early and late wet season months on the Tiwi Islands north of Darwin in the Northern Territory Australia. The simulation run with a 100-m grid spacing on Turing, the CNRS/IDRIS Blue Gene/Q using 16 384 cores. The animation shows the impact of Hector on the water vapor at 19 km altitude.

Several Meso-NH ForeFire wildfire simulations available on youtube

Older Meso-NH examples

Mesonh-53: Gallery (last edited 2015-11-13 12:26:38 by JeanPierreChaboureau)