I'm not using
radiative balance as a mechanism, but as the method of identifying where the mechanism will lead
Not exact matches
«Fire is losing heat through
radiative and convective heat transfer and it is gaining heat
as energy is produced
as a result of combustion, so it is an energy
balance problem.
Stratospheric cooling
as a result of excess CO2 does influence ozone recovery, and ozone changes in the troposphere and stratosphere to have effects on
radiative balance of the planet.
I think the actual point that we were making was that the cloud feedback (how clouds change
as a function of the temperature, circulation, humidity etc., and how that impacts the
radiative balance) is not being calculated here.
However, practices differ significantly on some key aspects, in particular, in the use of initialized forecast analyses
as a tool, the explicit use of the historical transient record, and the use of the present day
radiative imbalance vs. the implied
balance in the pre-industrial
as a target.»
Earth's energy
balance In response to a positive
radiative forcing F (see Appendix A), such
as characterizes the present - day anthropogenic perturbation (Forsteret al., 2007), the planet must increase its net energy loss to space in order to re-establish energy
balance (with net energy loss being the difference between the outgoing long - wave (LW) radiation and net incoming shortwave (SW) radiation at the top - of - atmosphere (TOA)-RRB-.
While it is true that changing stratospheric ozone levels do impact the planets
radiative balance (and vica versa) it is a 2nd order issue and global warming and ozone depletion should be viewed
as two separate issues.
Given the economic tenor of many news stories, an analogy to inflation may be useful in clarifying the idea of slow but steady
radiative bracket creep,
as the CO2 forcing can be outlined in terms of its effect on the
radiative balance, which reduces to watts / M2 and their rate of change.
As an analogy, if I told you that I was going to paint my white car black and that I expected it would get hotter on sunny days as a result, you would probably start asking questions about what the temperature of the paint was when I applied it and how those molecules heated up or cooled down, ignoring the relevant factor which is this: By painting the car black, I am changing the car's albedo and thus changing the radiative balance between the car and the sun on sunny day
As an analogy, if I told you that I was going to paint my white car black and that I expected it would get hotter on sunny days
as a result, you would probably start asking questions about what the temperature of the paint was when I applied it and how those molecules heated up or cooled down, ignoring the relevant factor which is this: By painting the car black, I am changing the car's albedo and thus changing the radiative balance between the car and the sun on sunny day
as a result, you would probably start asking questions about what the temperature of the paint was when I applied it and how those molecules heated up or cooled down, ignoring the relevant factor which is this: By painting the car black, I am changing the car's albedo and thus changing the
radiative balance between the car and the sun on sunny days.
So a local spike in precipitation releases a lot of heat — but
as the heat increases, this negatively affects the vapor - > water transition (precipitation, or raindrop formation), since warm air holds more water then cool air — and so the limit on precipitation vis - a-vis the
radiative balance of the atmosphere appears.
Thus there is convection within the troposphere that (to a first approximation) tends to sustain some lapse rate profile within the layer — that itself can vary
as a function of climate (and height, location, time), but given any relative temperature distribution within the layer (including horizontal and temporal variations and relationship to variable CSD contributors (water vapor, clouds)-RRB-, the temperature of the whole layer must shift to
balance radiative fluxes into and out of the layer (in the global time averae, and in the approximation of zero global time average convection above the troposphere), producing a PRt2 (in the global time average) equal to RFt2.
In general: even if the stratosphere
as a whole cools (in terms of a decrease in total flux going out, to
balance radiative forcings +
radiative response from below), this doesn't necessarily mean cooling occurs throughout; there could be some portions that warm.
Likewise, I know that the average
radiative balance of the earth has been mathematically determined but I do not think that we are measuring actual
radiative gains and losses over the entire spectrum well enough
as yet.
Matthew Marler, those other surface fluxes do nothing to restore the
radiative balance of the earth
as seen from space.
Then, if compositional changes occur, involving changes in the net
radiative balance of the entire atmosphere the climate zones will shift
as the atmosphere has to work more hard or less hard to maintain top of atmosphere energy
balance.
For instance,
radiative transfer models (measuring heat
balance) are quite well verified, and accurately predict the rise in the temperature (and hence energy) of the atmosphere
as the CO2 level increases.
The resultant heating
balances the negative net
radiative flux
as long
as it is above a threshold R C, below which no conventional monsoon exists.
«
Radiative forcing is a measure of the influence a factor has in altering the
balance of incoming and outgoing energy in the Earth - atmosphere system and is an index of the importance of the factor
as a potential climate change mechanism.
The exact
balance of the energy transferred from the surface via
radiative and convective processes seems not to be accurately known (
as far
as I have read to date), but non-
radiative processes dominate.
The atmopshere will respond to a change of
radiative balance by changes in conduction, convection and the latent heat of water,
as well
as radiation effects.
A
radiative imbalance exists only so long
as it takes for the
balance to be restored at a higher temperature.
He does not look at the top of atmosphere
balance to see how it remains unbalanced under his modified state, so he hasn't looked at
radiative equilibrium, but some kind of transient response,
as far
as I can tell.
If something occurs to cause an imbalance between incoming and outgoing radiation, then you can't,
as a matter of principle, say that the system will change to maintain
radiative balance, it depends on the system.
As described, the whole temperature profile gives rise to the
radiative transport, which gives rise to the heating at ground level, which gradually raises the whole temperature profile (via convection) until
radiative balance is achieved.
Extra heat from all sources — including the interior of the planet, fossil fuel burning, nuclear fission, solar radiance, north - south asymetry and — the big one — cloud
radiative forcing — is retained in planetary systems
as longwave emissions and shortwave reflectance adjusts to
balance the global energy budget.
A comparison of the
radiative equilibrium temperatures with the observed temperatures has indicated the extent to which the other atmospheric processes, such
as convection, large - scale circulation, and condensation processes, influence the thermal energy
balance of the system.
It is found
as the additional result that the
radiative heat transfer qr has small influence on the integral heat
balance.
Radiation levels adjust automatically so
as to be in
balance in so far
as net
radiative flux at TOA.
To clarify, consider the change in the net
radiative balance at the surface
as having a shortwave and longwave component
These impact the overall energy
balance of the planet, known
as radiative forcing, which is what causes the global temperature to rise.
It's an appropriate definition for looking to the changes well past 2100
as Earth settles into equilibrium again (by which I mean approximate
radiative energy
balance between solar input and thermal emission to space).
As you point out, there is no question that adding CO2 to the atmosphere affects what I call the «
radiative balance» for want of a better term.
Clouds and condensation are the
balancing outgoing delivery mechanism of heat on this planet, and overwhelm the
radiative effect with convection, and
as a bonus also block incoming radiation, especially in the tropics, leading to a natural, self regulating thermostat effect.
As I posted above, this leads to the non-sensical result that one thick shell results in a totally different
radiative balance than 10 thin shells.
A negative feedback that occurs is that because the lapse rate in a warmer climate is expected to decrease (i.e., the upper troposphere is expected to warm more rapidly than the surface on average), it doesn't take
as large a surface warming to produce enough warming in the mid / upper - troposphere to restore
radiative balance.
In a sense, what Willis has done is manage to make the same mistake
as the people who think that the Earth is in «
radiative balance» and try to work out a tedious budget of everything going in and out.
All else equal, the surface that is in
radiative balance moves up
as GHGs increase.
2) Failing to acknowledge that natural variations in the effective radiating height of the atmosphere occur all the time
as a result of the ever changing
balance between different non
radiative processes within the atmosphere.
So, that is what we came up with — A few very simple models, such
as the one that involves 3 objects: one object A producing thermal energy and radiating energy at a fixed rate, two other objects B and C whose temperature is determined via
radiative balance with object A and empty space, with a geometry such that the temperature of object B is higher than that of object C. And, what we wanted to illustrate is that the object C «warms» B in the colloquial sense of the word... i.e., that the presence of object C causes B to be at a higher temperature than if C is absent.
As a result, the earth system heats up until
radiative balance is restored.
If the atmosphere contained no IR - absorbing substances, then all the IR emitted by the earth's surface would escape into space and
radiative balance would dictate that the earth's average surface temperature (or really the average of emissivity * T ^ 4 where T is the absolute temperature and the emissivity of most terrestrial materials in the wavelength range of interest is very close to 1) is set by the condition that the earth must radiate
as much energy
as it absorbs from the sun.
What he shows is that a change in the
radiative balance between the surface and the atmosphere even by a larger amount, such
as 10 W / m ^ 2 would result in only a very small surface temperature change while a change in the greenhouse effect (i.e., the
radiative balance between the earth and space) by 10 W / m ^ 2 results in a much larger surface temperature change (almost 2 orders of magnitude larger if I recall correctly).
A: The volume integral (heat
balance equation)
as presented in Pielke (2003) http://blue.atmos.colostate.edu/publications/pdf/R-247.pdf suggests that the changes in ocean heat storage averaged over a year are a snapshot of the
radiative imbalance at the top of the atmosphere.
As far as I can tell, that's just gibberish — what datasets were «averaged» and what do you mean by «Radiative balance»
As far
as I can tell, that's just gibberish — what datasets were «averaged» and what do you mean by «Radiative balance»
as I can tell, that's just gibberish — what datasets were «averaged» and what do you mean by «
Radiative balance»?
Comparison with independent data, such
as the top of atmosphere (TOA)
radiative balance also provides insight (32).
I have given a number of links above to where this issue has been debated before and it is summed up by this: The AGW GMST is incorrect because it does not allow for this effect, that is: (A + B) ^ 4 > A ^ 4 + B ^ 4;
as Mait shows you can have an average temperature which does not reflect the
radiative balance of the Moon and vice-versa.
The
radiative balance is maintained for the planet
as a whole.
Here, the GHE will, for all intents and purposes, be defined
as the set of conditions that are responsible for discrepancy between the observed global mean surface temperature of a planet and that predicted based on the energy flux received from the sun, rather than being restricted to a mere
radiative balance.
There are many ways to reconfigure the temperature in the column and at the surface to
balance the
radiative change due to CO2, but I would submit the only objective one is to change the whole column and surface by the same temperature and find out what that temperature is independently for each global column (
as I posted elsewhere here regarding MODTRAN).
Recall that Teh Modulz are not only tuned to GMST, but to things like cloud, snow and ice coverage
as well
as ocean heat content — all of which have an impact on
radiative balance and hence energy budget of the system, not to mention energy redistribution internally.