Sentences with phrase «cooling after volcanic eruptions»

Global cooling after volcanic eruptions has been recorded in ice core data and thermometers,: 1809, 1815, 1883, 1980 etc. and others.

Not exact matches

After large volcanic eruptions that pump sulphur dioxide into the atmosphere, such as that of mount Pinatubo in the Philippines in 1991, the planet cools for a year or two.

Besides SSCE, scientists have also been investigating stratospheric sulfur injections — firing sun - reflecting aerosols into the air, similar to the cooling effect after a volcanic eruption — and cirrus cloud thinning, where you thin the top level of clouds, which have a warming effect on the planet.

Researchers know that large amounts of aerosols can significantly cool the planet; the effect has been observed after large volcanic eruptions.

Not until after a catastrophic chain of volcanic eruptions cooled the Earth and decimated those competitors did dinosaurs become dominant worldwide.

It's also now well understood that large volcanic eruptions have a short - term cooling effect, see GW FAQ: effect of volcanic activity (short - term being the key phrase, after Church et al Nature 2005, and also http://www.llnl.gov/str/JulAug02/Santer.html)

The short - term variations are dominated by ENSO but also can be influenced by large tropical volcanic eruptions (such as occurred in 1963, 1982 and, markedly, 1991), so the years after those eruptions are anomalously cool.

(For instance, do the models predict cooling after big volcanic eruptions?

In other words, if we are after a cause (or causes) for the temperature increase during the period in question, the presence or absence of aerosols from volcanic eruptions is beside the point, because they can not explain any increase in temperatures that occurred prior to any cooling effect they might have had.

Some longer - term effects may remain after several consecutive eruptions, but even then, the 0.1 K cooling by volcanic eruptions over the past 600 years (0.3 K modeled over the past 100 years, see fig. 1 on this page) seems rather high...

After a large volcanic eruption, the layer of sulfate aerosols in the stratosphere gets thicker, and we see, in the historic record, that the Earth cools down in response.

Volcanic activity was high during this period of history, and we know from modern studies of volcanism that eruptions can have strong cooling effects on the climate for several years after an eruption.

He writes: I say this is a result of the action of climate phenomena that oppose the cooling... if my theory were correct, we should see a volcanic signal in some other part of the climate system involved in governing the temperature... I should see an increase in the heat contained in the Pacific Ocean after the eruptions Thing is, El Ninos release heat from the ocean, they don't store heat.

In fact, the rate of change of CO2 levels actually drops slightly after a volcanic eruption, possibly due to the cooling effect of aerosols.

In effect, these particles — whether aerosols or kitchen table salt — could act like natural aerosols that cool the planet after a volcanic eruption.

[Using the GISS record staring in 1991 or 1992 — the cool years just after the volcanic eruption of Mt. Pinatubo]

Generally, a significant cooling of the surface occurs in the first weeks after major volcanic eruptions, lasting for one to two years and leading to modified patterns of precipitation, surface pressure and the teleconnection patterns, such as the Arctic Oscillation (AO), North Atlantic Oscillation (NAO)

The Sulfate cooling mechanism is also evidenced whenever there is a high ejecta mass volcanic eruption, which causes a measurable cooling effect, for about 3 years after an eruption; until the sulfate particulate aerosols diminish in the atmosphere to the point that they become negligible.

The short - term variations are dominated by ENSO but also can be influenced by large tropical volcanic eruptions (such as occurred in 1963, 1982 and, markedly, 1991), so the years after those eruptions are anomalously cool.

Third: There was no cooling in the 1920s; in fact that was the start of a multidecadal warming trend that lasted until just after World War II (followed by a brief cooling trend, possibly due to increased aerosols dimming incoming sunlight together with some pretty big volcanic eruptions which did the same thing).

Observations of recent global warming, short - term cooling after major volcanic eruptions, cooling at the Last Glacial Maximum and other periods in the historical record, and the seasonal variation in climate, all provide some information which helps to determine the value of climate sensitivity.

We'd expect to see the imprint of this large error in comparisons with observed surface temperature changes over the 20th century (37 - 42), and in comparisons with the observed cooling after large volcanic eruptions (30, 43, 44).