Every person that has ever flown in a jet plane knows that air pressure and
air temperature decreases with altitude, yet they can't grasp the elegant simplicity of this observational model in explaining the temperature profile from the tropopause to the near surface.
Hence, when
the air temperature decreases, ice and snow fields grow, and this continues until an equilibrium is reached.
In the central United States, for example, observational data indicate that rainfall increased, surface
air temperature decreased, and surface humidity increased during the summer over the course of the 20th century concurrently with increases in both agricultural production and global GHG emissions.
But other than that wouldn't be similar in terms of air temperature and
air temperature decreasing with higher elevation?
Not exact matches
The reason: Emerging from a hot shower into cooler
air brings a sudden
decrease in body
temperature, leading to a tranquil state of mind.
External factors — harsh
temperatures,
air conditioning, heat (especially in winter months when we are cooped up indoors), exposure to the sun, showering too often, and soaps made with strong chemicals —
decrease sebum production, as does aging.
The study found that after the initial
decrease of solar radiation in 2020, globally averaged surface
air temperature cooled by up to several tenths of a degree Celsius.
Rising
temperatures, for example, could either increase or
decrease biological productivity,» Salawitch says, as well as the emission of certain less - prevalent gases that are exchanged between the
air and ocean.
«The maximum concentration of (invisible) water vapor which can occur in
air decreases to extremely low values at very cold
temperatures.
The extreme high pressure over the Barents Sea also led to a
decrease in the
air temperature.
http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-11-00148.1 Global satellite observations show the sea surface
temperature (SST) increasing since the 1970s in all ocean basins, while the net
air — sea heat flux Q
decreases.
Other factors contributing to the recent regional rapid warming over the Antarctic Peninsula include
decreased sea ice in the Bellingshausen Sea, resulting in warmer
air temperatures, and
decreasing precipitation over the south western peninsula [10, 11].
The freezing cold
air was found to rapidly reduce pain and inflammation by
decreasing the skin's external
temperature, causing an influx of endorphins (your body's natural painkillers) to be released.
Computerized aftermarket injection systems are being offered which are capable of delivering a precisely metered water and methanol injection, directly into the
air intake system significantly boosting horsepower by
decreasing intake
air temperature.
Therefore, they have to have cool
air to
decrease their body
temperature.
For example, [Kruss 1983] has this to say about the Lewis glacier on Mt. Kenya: «A
decrease in the annual precipitation on the order of 150 mm in the last quarter of the 19th century, followed by a secular
air temperature rise of a few tenths of a degree centigrade during the first half of the 20th century, together with associated albedo and cloudiness variation, constitute the most likely cause of the Lewis Glacier wastage during the last 100 years.»
The reason there are tropical glaciers at all is that
temperature decreases with altitude, as a consequence of the compressibility of
air.
The significant difference between the observed
decrease of the CO2 sink estimated by the inversion (0.03 PgC / y per decade) and the expected increase due solely to rising atmospheric CO2 -LRB--0.05 PgC / y per decade) indicates that there has been a relative weakening of the Southern Ocean CO2 sink (0.08 PgC / y per decade) due to changes in other atmospheric forcing (winds, surface
air temperature, and water fluxes).
Indeed, there is a clear physical reason why this is the case — the increase in water vapour as surface
air temperature rises causes a change in the moist - adiabatic lapse rate (the
decrease of
temperature with height) such that the surface to mid-tropospheric gradient
decreases with increasing
temperature (i.e. it warms faster aloft).
And if
decreasing carbon emissions turns out not to affect global
temperatures, at least it will free us from petroleum dependency and clear up the
air.
ie does a slightly lower density of
air mean a slightly lower ground level
temperature (
temperature normally
decreases with height at the lower
air density), so that in reality adding CO2 and subtracting more O2 actually causes miniscule or trivial global COOLING, and the (unused) ability of the changed atmosphere to absorb radiation energy and transmit it to the rest of the
air is overruled or limited by the ideal gas law?
And no, there is no huge plunge in tropical or global surface
air temperatures when the ocean circulation spins up because there is a near - compensating
decrease in poleward heat transport via the atmospheric circulation.
The authors of the article on cosmic rays and cloud changes clearly indicate (both in the abstract and in their Fig. 5) that a
decrease in cloudiness (linked to a
decrease in cosmic rays) is associated with an INCREASE of surface level
air temperature, in other words clouds give negative feedback.
Now since relative humidity remains roughly constant at the ocean surface and the
air's capacity to hold water increases with
temperature, relative humidity will actually
decrease over land, particularly as one enters the continental interiors.
the differential cloud change (dcc) of each day is equal to daily average cloud change (x), minus an averaging period of three days which begins five days prior to each date,... «-RRB-, linked to a transient
decrease in cosmic rays, is associated with a transient increase of surface level
air temperature.
Actually global warming is supposed to increase precipitation in Antarctica, not
decrease it — as raising the
temperature puts more moisture in the
air for precipitation.
Re 9 wili — I know of a paper suggesting, as I recall, that enhanced «backradiation» (downward radiation reaching the surface emitted by the
air / clouds) contributed more to Arctic amplification specifically in the cold part of the year (just to be clear, backradiation should generally increase with any warming (aside from greenhouse feedbacks) and more so with a warming due to an increase in the greenhouse effect (including feedbacks like water vapor and, if positive, clouds, though regional changes in water vapor and clouds can go against the global trend); otherwise it was always my understanding that the albedo feedback was key (while sea ice
decreases so far have been more a summer phenomenon (when it would be warmer to begin with), the heat capacity of the sea prevents much
temperature response, but there is a greater build up of heat from the albedo feedback, and this is released in the cold part of the year when ice forms later or would have formed or would have been thicker; the seasonal effect of reduced winter snow cover
decreasing at those latitudes which still recieve sunlight in the winter would not be so delayed).
@ wilt — 26 November 2010 @ 2:54 AM «a
decrease in cloudiness (linked to a
decrease in cosmic rays) is associated with an INCREASE of surface level
air temperature, in other words clouds give negative feedback.»
Certainly any increase in
air temperature from radiative forcings (apparently reasonably well modeled in the GCMs) is going to increase the
temperature differential from ground to space, which will increase the vertical
air velocity (ie increased hurricane strength) and
DECREASE the residence time of energy in the
air in the same manner that GHGs increase the residence time.
For example, suppose I told you that a 1 kilometer cube of
air outside Phoenix Arizona increased in
temperature by 0.6 degrees Celsius from 1980 to 2005, and a 1 kilometer cube of
air outside Orlando, Florida
decreased in
temperature by 0.5 degrees Celsius in that same period.
Temperature decreases with altitude, meaning that the
air above is cooler than that below.
Roger disputed that carbon (as CO2) caused any warming, that honest, unaltered science thought CO2 to be the consequence rather than the driver of
temperature increases, that increasing CO2 in the
air was sourced by natural phenomena rather than mostly man - made, and that to
decrease CO2 to levels required by regulation would start to starve plants, making more folks on the planet to starve accordingly.
The antarctic ice winter max
decreased by about one third during this period, and the HadCRUT temp data base for that region during that period does show a substantial surface
air temperature warming trend.
The 2009 State of the Climate Report of the US National Oceanic and Atmospheric Administration (NOAA) tells us that climate change is real because of rising surface
air temperatures since 1880 over land and the ocean, ocean acidification, sea level rise, glaciers melting, rising specific humidity, ocean heat content increasing, sea ice retreating, glaciers diminishing, Northern Hemisphere snow cover
decreasing, and so many other lines of evidence.
I left that for JIM D, but the rate of warming of the surface
air decreases as the ocean
temperature increases.
Since 1950, it has been found that the global diurnal
temperature range (DTR), the difference between the minimum
temperature (Tmin) and the maximum
temperature (Tmax) of daily surface
air temperature, has been temporally
decreasing in several places all over the world.
Water levels are influenced by the amount of evaporation from
decreased ice cover and warmer
air temperatures, by evapotranspiration from warmer
air temperatures, and by potential increases in inflow from more precipitation.
This can be affected by warming
temperatures, but also by changes in snowfall, increases in solar radiation absorption due to a
decrease in cloud cover, and increases in the water vapor content of
air near the earth's surface.2, 14,15,16,17 In Cordillera Blanca, Peru, for example, one study of glacier retreat between 1930 and 1950 linked the retreat to a decline in cloud cover and precipitation.18
Causality is always tricky to assign in cases such as this one, since it's entirely possible that the ridging itself has led to warm surface water though
decreased oceanic mixing by wind and unusually high
air temperatures.
Even in areas where precipitation does not
decrease, these increases in surface evaporation and loss of water from plants lead to more rapid drying of soils if the effects of higher
temperatures are not offset by other changes (such as reduced wind speed or increased humidity).5 As soil dries out, a larger proportion of the incoming heat from the sun goes into heating the soil and adjacent
air rather than evaporating its moisture, resulting in hotter summers under drier climatic conditions.6
Since the surrounding
air also
decreases in
temperature with height, the following simple equation can be used.
The changes produced a
decrease of 0.006 °C / decade for the 1880 to 2014 trend of the annual mean land surface
air temperature rather than the 0.003 °C / decade increase reported by NCEI.
Odd, the actual measured Antarctic regional
air temperatures have showed a general and many - year long
decreasing trend.
As for rainfall, in the simplest models, lowered
temperatures decrease evaporation of water from the surface into the
air; and less water vapor translates to less rain.
Predictive assesments, so far in form of analogies, have been made: Because the solar motion in the next decades will be chaotic, lower and longer solar cycles (with irregular length), ocurrence of huge volcanic events and a
decrease of global surface
air temperature can be expected.
In the mesosphere, the
temperature decreases with height again, because there is very little ozone to warm up the
air.
Decreases in
air quality during heat waves, for example, can worsen the effects of respiratory illnesses and heart disease; high
temperatures also increase the risk of heat stress.
The circulation is accompanied somewhat by a
decrease in the overall range of surface -
air temperature between the equator and poles and by an overall increase in the mean global surface -
air temperatures.
And p. 347 B&A correctly conclude for top post equilibrated Fig. 1: «As we saw in section 4.4, the natural state of affairs is for the
temperature of an isolated layer of
air in a gravitational field to
decrease with (increasing) height»
He asserts that
temperature is related to kinetic energy only, and that kinetic energy on average «
decreases» per molecule as one ascends the
air column.