I have met people who responded to the usual line about ships vanishing over the horizon by talking about atmospheric refraction, and that the rays of light were curved
in the atmospheric density gradient.
In the real world the most obvious and most common reason for a change
in atmospheric density occurs naturally when the oceans are in warming mode and solar irradiation is high as during the period 1975 to 1998.
I suppose that with a sufficient change
in the atmospheric density by the addition of a gas, one might expect changes in physical processes like thermal conduction and / or advection to make a difference but that isn't what the engineer was claiming by my reading.
Not exact matches
So the delta wing at the back, which also includes a split flap for pitch and roll control allows us to control the pitch angle despite having a wide range of payloads
in the nose and a wide range of
atmospheric densities.
The results,
in the October 15 Science, agree with theoretical predictions, suggesting that superconducting gravimeters can help satellites chart the earth's gravity to map changes
in polar ice cap thickness, seawater levels,
atmospheric density and planetary geology.
By being able to measure electron
density with high accuracy
in atmospheric pressure low - temperature plasma, it is no longer necessary to rely solely upon experience and trial and error.
But
in the case of
atmospheric pressure low -
density plasma, due to the influences of changes
in the
atmospheric pressure
in a plasma as well as around the plasma, it was difficult to accurately measure electron
density.
But at around 1.9 million times
atmospheric pressure and 4,800 kelvins (about 4,500 ° Celsius), the scientists observed a jump
in density and temperature.
Differences
in moisture content of the beans,
atmospheric pressure, relative humidity, temperature,
density of the coffee, and also what flavour qualities am I looking to develop and highlight
in this coffee — these are now the questions that I consider every day.
Cosmic ray ionization
in the Martian atmosphere has been studied extensively using computational models (Whitten et al. 1971; Molina - Cuberos 2001; Molina - Cuberos et al. 2001; Norman et al. 2014; Gronoff et al. 2015), with the general result that the
atmospheric ionization profile due to GCR is relatively flat, with monotonically increasing ionization rates with decreasing altitude and increasing
atmospheric density.
In 2003, astronomers at the University of Texas at Arlington performed refined calculations to determine that the habitable zone around 47 Ursae Majoris, where an inner rocky planet (with suitable mass and
atmospheric gas composition and
density) can have liquid water on its surface, lies between 1.05 and 1.83 AUs of the star.
Many of the planets discovered by EDEN around nearby stars will be suitable for
in - depth
atmospheric characterization, mass, radius, and bulk
density measurements through follow - up observations with large ground - and space - based telescopes, such as NASA's James Webb Space Telescope.
High
density fog,
atmospheric anomalies, and severe thunderstorms
in an almost liquid atmosphere, will make drone design more challenging and provide unique gameplay.
It's something of an abstract concept, but with real world implications, and the universality of such physical models, based on things like radiative balance,
atmospheric composition and
density, distance from the local Sun, etc., is a very strong argument
in favor of general acceptance of the results of climate models and observations on Earth.
Re 423 Chris G — whether the effect saturates at a given
density depends on the way the temperature is distributed; if the temperature from TOA downward is isothermal for a sufficient thickness, than the effect could be saturated at TOA (if starting from a large enough optical thickness per unit
atmospheric mass path, a change
in the
density of the gas / etc that contributes optical thickness would then have little to no effect on the flux at TOA, which is what is meant by saturation.
The only things that can change that resultant point of temperature equilibrium are changes
in solar radiance coming
in or changes
in overall
atmospheric density which affect the radiant energy going out.
The only things that can change that resultant point of temperature equilibrium significantly are changes
in solar radiance coming
in and changes
in overall
atmospheric density (a function of mass and pressure) which affect the radiant energy going out or a change
in the speed of the water cycle which, because of the unique characteristics of the phase changes of water altering the speed of energy flow through the system is capable of exerting a powerful regulatory effect.
For example, let's say that evidence convinced me (
in a way that I wasn't convinced previously) that all recent changes
in land surface temperatures and sea surface temperatures and
atmospheric temperatures and deep sea temperatures and sea ice extent and sea ice volume and sea ice
density and moisture content
in the air and cloud coverage and rainfall and measures of extreme weather were all directly tied to internal natural variability, and that I can now see that as the result of a statistical modeling of the trends as associated with natural phenomena.
However, I have argued elsewhere, that because of both temperature and
density gradients, the escape path to space is favored over the return path to the surface; because of re-absorption
in subsequent
atmospheric layers.
There were
atmospheric CO2
density sets made early
in the 1900s, some showing CO2
densities as high or higher than today.
The atmosphere is analogous to a flexible lens that is shaped by the
density distribution of the gas molecules, of the atmosphere
in the space between the sphere holding them, and space; Incoming heat gets collected
in many ways and places,, primarily by intermittent solar radiation gets stored,
in vast quantities, and slowly but also a barrage of mass and energy fluxes from all directions; that are slowly transported great distances and to higher altitudes mostly by oceanic and
atmospheric mass flows.
For us, one of the most fascinating findings of this analysis is that the
atmospheric temperature profiles from the boundary layer to the middle of the stratosphere can be so well described
in terms of just two or three distinct regions, each of which has an almost linear relationship between molar
density and pressure.
I did not read that «the idea that gravity by itself can create a permanent gradient of temperature
in an atmosphere» other then the idea that
atmospheric density by itself creates greater heat capacity, thus a longer residence time for energy to saturate while insolation continues unabated.
In fact, atmospheric density is far more important than the proportion of CO2 in dictating the strength of a planet's atmospheric greenhouse effec
In fact,
atmospheric density is far more important than the proportion of CO2
in dictating the strength of a planet's atmospheric greenhouse effec
in dictating the strength of a planet's
atmospheric greenhouse effect.
In atmospheric physics, lidar is used as a remote detection instrument to measure
densities of certain constituents of the middle and upper atmosphere, such as potassium, sodium, or molecular nitrogen and oxygen.
As Anthony pointed out some time ago, when looking at the temperature profile of Vensus, where the
atmospheric density reaches one bar
in the
atmospheric column, the temperature is nearly the same as Earth's.
In short, your idea that the temperature of the earth has been remarkably stable over times is correct, and the idea that water seems to dominate also looks correct, but the idea of a stable
atmospheric density appears incorrect, and the ancient sun is a complete unknown that needs looking into.
Micro bubbles found
in deep polar ice cores of the ancient atmosphere (1 - 200,000 years ago) showed a higher
atmospheric density than now, perhaps 2 atmospheres, also higher water vapor and CO2.
It is further argued that the transition of vertical circulation patterns is
in response to adjustments to geostrophic imbalance — an adjustment time scale of 6 — 9 h. Although unproven, we suggest that antecedent rainfall over the alkali desert 2 weeks prior to the event was instrumental
in lowering the bulk
density of sediments and thereby improved the chances for dust ablation by the
atmospheric disturbance.
So
density weighted temperatures of the entire atmosphere would be a step
in the right direction (provided good long - term records for the rest of the atmosphere — which only go back to the 1970s), but strong El Ninos would continue to drive substantial variations
in global
density weighted
atmospheric temperatures.
A second BCDR strategy is forestry - based sequestration, which removes
atmospheric carbon and stores it
in forest biomass by increasing forest area and / or carbon
density.