In the meantime, she thinks the reason the selective
difference at altitude is so large is that the altitude is constant, affecting people every day.
Not exact matches
I live in Montana
at an
altitude of around 4,000 ft. Would that make a
difference in the way they rise?
If you boil the salty water
at sea level and the distilled water
at the Everest peak you do not know if the
difference in temperatures is due to the Salt or to the
altitude.
The smoke - induced increase in wind speed
at an
altitude of 1 km enhanced a phenomenon called wind shear, the
difference in wind velocity between one layer of the atmosphere and another.
Although the
difference in
altitude doesn't sound much, the
differences between the inner and outer atmosphere are actually quite pronounced, with the atmosphere 10 times denser
at 125 km than it is as 150 km.
The second observation relates to the apparent
difference in the wet / dry adiabatic
altitude at temperatures in the range of -30 Deg C. Apparently, the British Arctic Survey Team operating out of Northern Canada in 2006 seemed to suggest that the formation of ice / snow in the upper atmospheric region of around 250mb seems to be remaining as super cooled water drops.
Tantangara reservoir is
at an
altitude of over 1200m, while Talbingo Reservoir is
at about 550m, a
difference of around 650m.
Wind shear is the
difference between the wind speed and direction
at different
altitudes.
I propose it makes little
difference to us on the ground if a thunder head is
at 65,000 ft v / s 60,000 ft. Not only will the
altitude of the condensation not benefit or harm us.
This version is necessary in order to take into account
differences in potential energy
at different
altitudes.
But a point you raised gnawed
at me, and I tentatively reached a result that is an argument for your point of view: if you start with our atmospheric pressure
at ground level, the
difference in kinetic energy Velasco et al. specify for an
altitude difference of, say, 10 km would not be measurable with a time uncertainty less than a second even in principle unless the gas - column width is less than something on the order of 100 nitrogen - molecule diameters across.
Does not your thought experiment fail, because most of the molecules in the atmosphere are all
at the same heat (kinetic energy), while the
difference in temperature with
altitude (on a thermometer) is simply an effect of the number of molecules you meet (pressure and density).
At a typical lapse rate of 6.5 deg C / km
altitude, a
difference of 60 - 110 m between the
altitudes of modern samples and 13th century samples is pretty significant: 0.39 - 0.72 deg C., say 0.55 deg.
One of expected consequences of the global warming is an increase in the temperature
difference between the Tropics and the Polar Regions
at altitudes of about 5 - 15 kilometres.
1998 in GISTemp shows what is supposed to be seen in the
difference between surface temperature and the
altitude that satellites measure temperature
at during El Nino.
During the first period the stratospheric polar vortex, a system of strong westerly winds
at altitudes 10 - 50 km, is projected to weaken, and this weakening slows down westerly winds all the way down to the surface, cancelling out the effect of the increasing temperature
difference between the Tropics and the Pole», explains researcher Alexey Karpechko from FMI.
When ascending the dry air cools much faster and low
altitudes,
at high
altitudes the
difference is small.
The faster cooling
at low
altitudes makes it possible and even likely that the initial
difference is reversed.
I didn't, but if that were true, there should be large
differences between CO2 levels on rainy and clear days and between
altitudes: less CO2 where the drops are formed and more CO2
at sealevel... As far as I know, no such huge
differences exist...
The new study suggests a link between global warming and increasing vertical wind shear, a measure of the
difference in wind speeds
at different
altitudes.
The basic idea was that reducing the
difference in temperature between the ocean (
at some fixed depth below the skin) and the atmosphere (
at some fixed low
altitude) through warming the atmosphere reduces the heat loss.
However, the large
difference in dry vs wet lapse rate is not due to the presence of water vapor changing the average Cp, but instead due to the progressive condensation of vapor to liquid or solid
at altitude (heat of condensation being released).
At least hundreds of gigalitres with an
altitude difference of 100m would be needed to smooth the output from all the wind farms in SA over a period of weeks.
This is totally
at odds with multiple robust, consistent, independently - derived empirical datasets, all showing no statistically significant positive (or negative) trend in temperature and thus, no
difference in trend by
altitude.