orographic cloud

orographic cloud

[¦ȯr·ə¦graf·ik ′klau̇d]
(meteorology)
A cloud whose form and extent is determined by the disturbing effects of orography upon the passing flow of air; because these clouds are linked with the form of the terrestrial relief, they generally move very slowly, if at all, although the winds at the same level may be very strong.
References in periodicals archive ?
Orographic cloud was expected prior to the start of the global storm on 2007 Jun 23.
Orographic cloud interception constitutes a major hydrological input within the study area (Clark et al.
The short residence time of an air parcel within an orographic cloud means that precipitation is much more dependent on the efficiency or speed of development of precipitation than in nonorographic clouds (Letcher and Cotton 2014).
Elysium showed the usual meteorological behaviour, and Elysium Mons and Hecates Tholus again showed an opposition brightening as well as orographic cloud.
The WWMPP was a multiyear project sponsored by the state of Wyoming that included a randomized seeding experiment to statistically evaluate the effectiveness of glaciogenic orographic cloud seeding with silver iodide (AgI) to enhance the snowpack in the state.
McKim had a good view of the area on Jun 18 and no trace of cloud existed; indeed, no orographic cloud appeared there again until late July, although Arsia Mons itself continued to be visible as a dusky spot.
The image does not show a bright mountain casting a dark shadow to its left; it shows the volcano Olympus Mons, whose slopes are covered by dark basalt, with a bright orographic cloud on its leeward (right) side.
Olympus Mons showed as a light spot throughout the day, merely ground-lit, for it was not brighter in blue, except faintly so in Parker's Aug 13 (Figure 13A) and Maxson's Aug 17 images, upon the evening terminator: final sightings of its orographic cloud.
Elysium itself often displayed the Elysium Mons orographic cloud.
We feel that these observations have, for the first time, demonstrated a direct link between the north polar cap's recession and orographic cloud formation.
What is certain is all of Montana's mountain ranges were capped with orographic clouds and mountain wave activity, and were comprised of shallow but extensive convection due to a layer of instability between the surface and 12,000 feet.
CASE 3: SILVER IODIDE SEEDING OF WINTERTIME OROGRAPHIC CLOUDS.