Sentences with phrase «tropopause height changes»

Technical Comment on «Contributions of Anthropogenic and Natural Forcing toRecent Tropopause Height Changes».

This positive detection result allows us to attribute overall tropopause height changes to a combination of anthropogenic and natural external forcings, with the anthropogenic component predominating.»

A model predicted fingerprint of tropopause height changes is statistically detectable in two different observational («reanalysis») data sets.

They then searched for, and positively identified, these model - predicted «fingerprints» in observations of tropopause height change.»

Not exact matches

For a real gas it's a lot harder to do the reasoning analytically, especially since you have to keep in mind the effects of changing the tropopause height.

Showing how a change in CO2 amount causes different LW flux changes at different heights would show how stratospheric cooling occurs, and the spectra (overlayed for 0.5 x, 1 x, 2 x, 4 x, 8 x preindustrial CO2) would also show the origin of the logarithic proportionality for tropopause - level forcing once the center of the band is saturated.

In their research, team members used advanced computer models of the climate system to estimate changes in the tropopause height that likely result from anthropogenic effects.

Although this is an over simplified model, I believe it is closer to the truth than the current idea that a change in the height of layer of atmosphere near the tropopause, around 100 mb, can affect the temperature of the planet at the 1000 mb level.

The only reasonable conclusion to be drawn from the above is that CO2, volcanic outbreaks and El Nino events have little or no effect on the background temperature trends in stratosphere and troposphere because of the ability of the Earth system to change the height of the tropopause and the size and location of the permanent climate zones to change the speed of energy flow through the Earth system and thereby negate any such effects.

Linear additivity was found to hold in the PCM model for changes in tropopause height and synthetic satellite - borne Microwave Sounding Unit (MSU) temperatures (Christy et al., 2000; Mears et al., 2003; Santer et al., 2003b).

«The sun causes latitudinal climate zone shifting with changes in the degree of jetstream zonality / meridionality by altering the ozone creation / destruction balance differentially at different heights above the tropopause.

So observation of change in the height of the tropopause turn out to be a lousy place to look for confirm that models to predict changes expected from GHGs.

The increased radiation is stronger, and the resultant energy imbalances through the stratosphere tend to change the temperature gradient and also to cool the stratosphere generally, raising the height of the top of the tropopause.

If the tropopause rises or falls, it causes a change in the gradient of tropopause height between equator and poles.

Figure 5: Changes in temperature and tropopause height in response to various radiative forcings (Santer 2003)

Changes in its speed are achieved by latitudinal shifts in the air circulation systems and by changes in the height of the tropChanges in its speed are achieved by latitudinal shifts in the air circulation systems and by changes in the height of the tropchanges in the height of the tropopause.

The latter show that human - induced changes in ozone and well - mixed greenhouse gases account for ~ 80 % of the simulated rise in tropopause height over 1979 — 1999.

But to quantify the influences (or «forcings» in climate jargon) even further, they considered three anthropogenic forcings — well - mixed greenhouse gases, sulfate aerosols, and tropospheric and stratospheric ozone — as well as two natural forcings — changes in solar irradiance and volcanic aerosols — all of which are likely to influence tropopause height.»

Santer, B.D., R. Sausen, T.M.L. Wigley, J.S. Boyle, K. AchutaRao, C. Doutriaux, J.E. Hansen, G.A. Meehl, E. Roeckner, R. Ruedy, G. Schmidt, and K.E. Taylor, 2003: Behavior of tropopause height and atmospheric temperature in models, reanalyses, and observations: Decadal changes.