Sentences with phrase «so volcanic aerosol»

But this «wall of wind» is a weaker feature at lower altitudes so volcanic aerosol was able to penetrate at altitudes below 13 kilometres.

Not exact matches

Besides knowing a lot more about the transport of volcanic aerosols in the atmosphere, modern researchers had communications lines and satellites so that news of an eruption could be relayed quickly and the effects noted as they unfolded.

«I had done some work modeling aerosols produced by volcanic eruptions for other projects, so I started looking into how we might detect an eruption and what it would tell us.»

While measurements of aerosol absorption in ultraviolet do not differentiate between the smoke, dust and ash aerosols, only volcanic clouds contain significant abundances of SO2, so satellite measurements of SO2 are especially valuable for unambiguous identification of volcanic clouds.

The causes are however reasonably well identified, a longer period than «usual» of lack of volcanic activity, so a lack of aerosols, combined with solar and CO2, although the latter two factors probably dominated.

Sulphate aerosols from a large volcanic eruption can do so, such as Pinatubo in 1991 - 93.

So, if lower volcanic activity during a period allows the concentrations aerosols to fall, more energy gets into the earth system, thus generating more heat.

So what Mr. Dodge is saying is that the dissipation of volcanic aerosols could not have happened unless they were being replenished by a LACK of additional volcanic activity?

Because such a struggle is the only reasonable explanation for why you fighting so hard against the idea that a dissipation of aerosols requires an absence of further volcanic activity.

Since aerosols last much longer in the stratosphere than they do in the rainy troposphere, the amount of aerosol - forming substance that would need to be injected into the stratosphere annually is far less than what would be needed to give a similar cooling effect in the troposphere, though so far as the stratospheric aerosol burden goes, it would still be a bit like making the Earth a permanently volcanic planet (think of a Pinatubo or two a year, forever).

If so, there would appear to me to be little value in comparing the two when looking for aerosol sensitivity to volcanic eruptions.

It takes a couple of years for most of the aerosols from a large volcanic eruption to settle out of the air, so their cooling effect likewise lasts a couple of years.

So now volcanoes decide... Even if Asia will reduce «anthropogenic influences» of sulfur aerosols, nothing we gain... We can not «hope» that abruptly we have a «volcanic silence» and anthropogenic GHGs «will triumph»... An aerosol «the end» of global warming?

As for aerosols, the volcanic record is what it is, after Katmai there are no major eruptions, so that simplifies the aerosol record somewhat.

We have poor direct information on aerosols, but the fossil fuel consumption rate is low, and there is only one major volcanic episode, so we can assume aerosol cooling is not significant.

And of course, had he made such a comparison by presenting the data from previous years, it would have refuted and so prevented his conclusions, that volcanic aerosols suppressed the warming.

I've done it with the ENSO signal once, but I didn't figure out how to do it with the volcanic aerosol signal until just recently, so I'm still working on this one.

This can be done to the ENSO signal (there are at least six different ENSO indices, however, and so you have to choose one that you think is «best» — there's a paper I'm going to track down that supposedly indicated that the simple indices are just as good as the complex, multivariate indices, but I haven't done so yet) and the volcanic aerosol signal.

The other is that I've corrected for more than just el Niño; I've adjusted for solar variations and volcanic aerosols too, so my correction removes the 1992 dip which was because of the eruption of the Mt. Pinatubo volcano.

So, this would be a modulating force to prevent short term heating of the surface, as more volcanoes would produce short term cooling from volcanic aerosols.

It is difficult to digitise the Figure 8.18 values for years affected by volcanic eruptions, so I have also adjusted the widely - used RCP4.5 forcings dataset to reflect the Section 7.5.3 observational estimate of current aerosol forcing, using Figure 8.18 and Table 8.7 data to update the projected RCP4.5 forcings for 2007 — 2011 where appropriate.

Sulfur dioxide is an aerosol that forms droplets of sulphuric acid in the high atmosphere and reflects solar energy back into space, so these two volcanic eruptions had some short - to medium - term effects.

Climate models aren't omniscient, so once you allow for changes in the solar cycle, natural variability and light - scattering aerosols from volcanic eruptions, the match is quite remarkable.

[Response: As far as I can tell — if you compensate for the affects of the southern oscillation index, volcanic aerosols, and solar variation (so you're looking at the man - made component), then temperature change since about 1975 is approximately linear.