Sentences with phrase «lower volcanic activity»

• a range of scenarios for volcanic eruptions (the models assume that the volcanic activity will be comparable to the 20th century, which had much lower volcanic activity than the 19th century)

Again, with arrows: lower volcanic activity — > lower aerosol concentrations — > more sunlight gets in — > more heat

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.

Regardless of artistic style, paintings created soon after volcanic eruptions had redder skies than those painted during periods of low volcanic activity, the researchers report online today in Atmospheric Chemistry and Physics.

Temperatures were driven upwards by CO2 and also solar changes and low volcanic activity.

The warming period from about 1920 — 1950 has been attributed to a combination of greenhouse gases (which were increasing through the period to some extent), solar changes, and unusually low volcanic activity.

Low volcanic activity (as eruptions can have a cooling effect by blocking out the sun).»

First, while the early 20th century warming was likely predominantly naturally - caused (i.e. low volcanic activity and increasing solar activity), there was also a significant human contribution as greenhouse gas emissions began to ramp up.

But «low volcanic activity» won't cut it either.

Also, unusually low volcanic activity kept that negative forcing to a minimum.

You aren't thinking about the warming period early last century, because we know it was a relatively brief period, and so lacked huge significance, and was caused by a combination of CO2 emissions, high solar activity and low volcanic activity and the later two factors haven't been apparent since the 1970's modern warming period.

Not exact matches

The white line represents the present - day Mediterranean coastline, blue regions show the submarine area in case of a 2 km Mediterranean sea level lowering as it was proposed during the Messinian salinity crisis and red circles show the location of volcanic provinces whose activity was enhanced during the Messinian (the size of the circle is proportional the activity augmentation).

The site where Loki is heavily influenced by volcanic activity, but actually quite low in temperature,» says Steffen Jørgensen from the University of Bergen in Norway, who was involved in taking the samples where Loki was found.

Volcanoes which are persistently active and emit a strong plume, while at the same time have low enough volcanic activity, are the perfect candidates to study.

On Sunday, Iceland lowered its warning code for possible volcanic disruption to the aviation industry to orange from red, the highest level on the country's five - point alert system, after concluding that seismic activity had not led to a volcanic eruption under the glacier.

Certain low - frequency activity may signal that a volcano is likely to spout an ash cloud, a column of jagged volcanic sand that can reach as high as 30,000 feet.

As discussed elsewhere on this site, modeling studies indicate that the modest cooling of hemispheric or global mean temperatures during the 15th - 19th centuries (relative to the warmer temperatures of the 11th - 14th centuries) appears to have been associated with a combination of lowered solar irradiance and a particularly intense period of explosive volcanic activity.

Foster and Rahmstorf (2011) used multiple linear regression to quantify and remove the effects of the El Niño Southern Oscillation (ENSO) and solar and volcanic activity from the surface and lower troposphere temperature data.

In contrast, super-Earths with a similar concentration but larger absolute amount of radioactive heat sources (i.e., uranium and thorium) than Earth would produce more internal heat, more vigorous mantle convection, and faster plate tectonic action involving thinner plates, which may promote planetary habitability with lower mountain ranges but higher volcanic activity and an atmosphere with a greater relative composition of volcanic and lighter gases (Sasselov and Valencia, Scientific American, August 2010; Valencia and O'Connell, 2009; and Valencia et al, 2007).

On September 29th, despite nothing but increased volcanic activity, the director had the audacity to call for the volcano alert level to be lowered, due to concerns about tourism to Bali over the Christmas holidays.

The recent volcanic activity of Mount Agung in Karangasem impacted Bali tourism as there were many flights cancellation, resulting low hotel occupancy.

Volcanic activity in Mount Agung is slowing and the volcano's status has been lowered from level four «danger» to level three «alert» by Indonesia's volcanology centre.

Volcanic activity on Mt. Agung had been slowing and the volcano's status was lowered from the highest level, danger, to the third highest level, alert, by the volcanology center.

Currently, Arenal Volcano only releases gases in crater C and has fumarole activity in crater D. Seismic monitoring of the volcano indicates that volcanic activity remains low and external manifestations have been reduced to a minimum.

At low tide take a walk along the beach between Wye River and Separation Creek to see some incredible rock formations created from ancient volcanic activity and find a private sandy beach to have all to yourself.

It has long been suspected that the low solar activity during the Maunder Minimum was one of the causes of the Little Ice Age, although other factors like a small drop in greenhouse gas concentrations around 1600 and strong volcanic eruptions during that time likely played a role as well.

Multiple causal factors have been suggested for the LIA: insolation change due to orbital cycles; low solar activity; high volcanic activity; and reduced atmospheric CO2 due to forest regrowth following human population collapses (the «Black Death» in Europe and Asia, and Columbian contact in the Americas.)

Infact, if one goes back to 1600 and graphs all major volcanic eruptions against high / low solar activity one will find that 88 % of all major volcanic eruptions have happend during periods of low solar activity.

The second one, which I buy into more, because the data is pretty solid, is during periods of low solar activity, volcanic activity (major volcanic activity) increases.

It would require lowest solar activity and probably some large volcanic eruptions.

I belive it is quite possible that a combination of low solar activity and high volcanic activity could push the world over the edge.

Lets look at the short term CO2 growth rate change due to temperature change and notice that the fudged record does not track growth rate change as well as the charts do here: http://www.biomind.de/realCO2/ When I try to understand why the CO2 levels may have been kept low by the LONG effects of volcanic activity as well as Krakatoa in 1883 I see a VE6 in 1902 and another in 1912 but then none that large until 1991 and I do not remember it being anything like the descriptions of Krakatoa.

Geothermal areas are categorised as low - and high - temperature fields, where high - temperature fields have temperatures over 180 °C and are found around tectonic plate boundaries where volcanic activity is high.

A string of very large volcanic eruptions or long period of extremely low solar activity would carry some significance but are not likely occurrances within the frame of, say, 50 years.

Because weather patterns vary, causing temperatures to be higher or lower than average from time to time due to factors like ocean processes, cloud variability, volcanic activity, and other natural cycles, scientists take a longer - term view in order to consider all of the year - to - year changes.

Additional volcanic activity and some solar minimums (Maunder, Dalton) continued to keep ocean heat content low, and we did not see the ocean heat content recover to MWP levels until nearly 1900.

The MWP saw the lowest level of volcanic activity in the past 2000 years — from about 700 AD to about 1225 AD.

Figure 1: Global surface and lower atmosphere temperature data from 5 data sets (with a 12 - month running average) before and after applying the statistical methodology of Foster and Rahmstorf (2011) to remove the influences of ENSO and solar and volcanic activity.

I expect one or two major volcanic eruptions within the next 3 years and yes associated with the very low solar activity.

So if major volcanic activity should pick up during this very low solar period of time like it did during the Dalton Solar Minimum it will not be recognized as a solar / climate link although would be n my opinion.

Volcanic activity is generally lower in periods of prolonged maxima of solar activity and higher in periods of prolonged solar minima.

Albedo should increase in response to very low solar conditions which should result in an increase in major volcanic activity, increase in global cloud coverage and sea ice / snow coverage.

Foster and Rahmstorf (2011) used multiple linear regression to remove the effects of solar and volcanic activity from the surface and lower troposphere temperature data.

16 Natural Climate Changes Volcanic Activity Volcanic dust can remain suspended in the atmosphere for several years, reflecting incoming solar radiation and lower global temperatures.

Foster and Rahmstorf (2011) used multiple linear regression to filter out the effects of the El Niño Southern Oscillation (ENSO), and solar and volcanic activity (Figure 2), and found that the underlying global surface and lower atmosphere warming trends have remained very steady in recent years (Figure 3).

It is thought that solar forcings played a role, and low levels of volcanic activity may also have contributed.

Foster and Rahmstorf (2011) used multiple linear regression to quantify and remove the effects of the El Niño Southern Oscillation (ENSO) and solar and volcanic activity from the surface and lower troposphere temperature data.

Tectonic and volcanic activity was low in the Canterbury Basin over the past several million years20; the sediments are devoid of diagenesis, and evidence for gravity flows is rare22.

From solar min to solar max the influence on temp has been estimated at around 0.1 deg C (some scientists came to 0.2), and the LIA was at least partly influenced by a sustained period of low solar activity, combined with high volcanic activity (see eg the wikipedia link I provided in the blog post).