Physics
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9414693j&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Oct. 20, 1989, p. 14693-14702. Research supported by NSF.
Physics
40
Cloud Glaciation, Diurnal Variations, Mesosphere, Noctilucent Clouds, Polar Regions, Atmospheric Models, Atmospheric Tides, Ice, Vertical Air Currents, Vertical Distribution
Scientific paper
The relationship between nuctilucent clouds (NLC), which are observed from the ground usually within 2 or 3 hrs of local midnight, and the polar mesospheric clouds (PMC), which are observed by satellites in full daylight, as well as the reason for the differences in their optical properties and their observed heights are investigated. Based on a suggestion that these differences can be attributed to a diurnal variation in the properties of a single type of cloud, two published models of the diurnal and semidiurnal variations of temperature, vertical wind speed, and eddy diffusion coefficient at high latitude to simulate the evolution of ice clouds over a 24-hr period. The results show that the minimum in temperature at about 2000 hours LT causes a sharp maximum in scattered brightness to occur about 1 hour before local midnight, with up to a factor of 7 variation in cloud brightness between noon and midnight. It is noted, however, that considerable uncertainties exist in these tidal models.
Jensen Eric
Thomas Gary E.
Toon Brian O.
No associations
LandOfFree
On the diurnal variation of noctilucent clouds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the diurnal variation of noctilucent clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the diurnal variation of noctilucent clouds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1530469