The phrase
"high clouds" refers to clouds that are located very high up in the sky.
Full definition
Actual initial conditions for the problem consist of temperature field, pressure field, moisture field,
high cloud field, etc etc..
-- Depending on
how high clouds are formed, their net effect may be different.
In contrast,
high clouds tend to have a warming effect on the surface and atmosphere.
The former are caused by faster water loss and
higher cloud bottoms with warming and the latter by increased cloud water density with warming.
High clouds like this are in reality warming us up slightly, even though they themselves are cold!
-- Depending on
how high clouds are formed, their net effect may be different.
A mostly sunny day with some very
thin high clouds, and an occasional lower altitude cloud drifting in.
Meanwhile, he continued,
higher cloud tops in effect thicken the total column of cloud, and that means more trapping of infrared or heat radiation that would otherwise exit to space.
Part of this sensitivity is attributed to a physically realistic positive radiative feedback, whereby a propensity toward
higher cloud fractions in any given simulation is amplified by longwave radiative cooling.
They are found almost exclusively in areas of dense forest, ranging from tropical evergreen forest to tropical dry forest and
high cloud forest.
In this data analysis activity, Students will plot and analyze a time series of data for
high cloud coverage from a specified location (home or school) and determine whether or not a seasonal pattern exists.
I asked a friend if he knew how many cloudless days they got - it happened to be overcast with
high clouds at the time and he (only partly in jest) said, «You mean sunny like this?
Their idealized increase of
high cloud amount has the strongest impact on global precipitation (see their table 4 below).
Additionally, the Impala has so much headroom — both in front and back — that there's a rumor going around that it
experiences high clouds and weather patterns.
abstract postscript pdf Pierrehumbert, RT 1996: Anomalous scaling of
high cloud variability in the tropical Pacific.
High cloud decks apparently block light from individual molecules lower in their atmospheres, making it harder to identify them.
Also, pollution can decrease the daily temperature range via such clouds:
High clouds left after a thunderstorm spread out across the sky and look like anvils.
Before long we're shuffling out of the gondola at the top station
beneath high clouds and patchy blue sky.
Weather wise this morning there was alot of
high cloud hanging around and some early morning rain falling down on the bukit.
On the Davies paper, there's little doubt that
if high cloud cover decreases in height, that can serve as a negative feedback mechanism.
Owing to long - range aerosol transport,
higher cloud frequency and susceptibility, the cooling over ocean is stronger than over land, resulting in an ocean - to - land ratio of 1.3.
That doens» t affect the equilibrium increase in the upward flux at TRPP in response, though it may change how much of that is absorbed by the stratosphere (perhaps a reduction due to shielding of water vapor and CO2 wings in the stratosphere by increased tropospheric water vapor (as it would by an increase in clouds,
particularly higher clouds)-- PS feedbacks also change the baseline spectral flux in the vicinity of the CO2 band.