Sentences with phrase «volcanic activity caused»

Note: the Foster and Rahmstorf results have been incorporated into the rebuttals to It's the sun (Intermediate and Advanced), A drop in volcanic activity caused warming, It's El Niño, Global warming stopped in [insert year], It hasn't warmed since 1998, and It's cooling

Conventional thought is that the warming sun and reduced volcanic activity caused much of the early 20th Century warming.

A drop in volcanic activity caused warming «There is no question the Earth has been warming; it is coming out of the «Little Ice Age».

How could a LACK of volcanic activity cause anything?

Not exact matches

«This method will aid our understanding of the processes that cause earthquakes and volcanic activity,» Hasterok said.

Volcanic eruptions and solar variations were still plausible causes of change, and some argued these would swamp any effects of human activities.

Ancient volcanic activity some 3.5 billion years ago melted a portion of the moon's mantle, causing it to bubble up toward its surface, like goo drifting upward in a lava lamp.

Interestingly, some scientists argue that without the cooling effect of major volcanic eruptions such as El Chichn and Mount Pinatubo, global warming effects caused by human activities would have been far more substantial.

A number of causes have been suggested, including changes in ocean currents due to melting glaciers and volcanic activity.

The new discoveries show that the formation 40 to 50 million years ago of the «Pacific Ring of Fire,» an active seafloor zone along the perimeter of the Pacific Ocean, caused dramatic changes in ocean depth and volcanic activity and buckled the seabed of Zealandia, according to Dickens.

The tilt was caused by the gigantic Tharsis volcanic dome, which first started to form over 3.7 billion years ago at a latitude of around 20 ° N. Volcanic activity continued for several hundred million years, forming a plateau exceeding 5,000 km in diameter, with a thickness of about 12 km and a mass of a billion billion tons (1 / 70th the mass of thvolcanic dome, which first started to form over 3.7 billion years ago at a latitude of around 20 ° N. Volcanic activity continued for several hundred million years, forming a plateau exceeding 5,000 km in diameter, with a thickness of about 12 km and a mass of a billion billion tons (1 / 70th the mass of thVolcanic activity continued for several hundred million years, forming a plateau exceeding 5,000 km in diameter, with a thickness of about 12 km and a mass of a billion billion tons (1 / 70th the mass of the Moon).

the sudden shaking of Earth's crust caused by the release of energy along fault lines or from volcanic activity.

It seems far more likely that volcanic activity and the natural ice age cycles are causing the current, temporary warming trend.

Investigating the cause of 20th Century warming is properly done in detection and attribution studies, which analyze the various forcings (e.g., solar variations, greenhouse gases or volcanic activity) and the observed time and space patterns of climate change in detail.

The global science community still isn't entirely sure what caused the repeated cycles — there may have been larger oceans in the northern hemisphere that powered a hydrological cycle (evaporation, condensation, precipitation), or shorter cycles could've been caused by volcanic activity or asteroid / comet impacts.

Smaller earthquakes can also be caused by volcanic activity, landslides, mine blasts, and nuclear tests.

Has anyone thought what propagates these waves (like is it dark matter or dark energy) and I wonder how much they affect the sun and earth - given they stretch / squeeze spacetime, could they slow the earth spin, flip poles, agitate fault lines as well as volcanic activity and heat up the sun causing more flares, etc..

This site, an Annenberg / CPB exhibit, provides fascinating information and interactive activities that help students better understand the forces that cause volcanic eruptions and the difficulty of predicting them.

Lesson created for the new OCR B (9 - 1) GCSE Geography specification, where students examine the natural causes of climate change, such as Milankovitch cycles, volcanic activity, sunspots and others.

«Volcanic activity remains high and there are indications of magma rising to the surface and causing tremors,» Sutopo Purwo Nugroho, a spokesman for the NDMA, said.

Indonesia sits on the Pacific «Ring of Fire» where tectonic plates collide, causing frequent seismic and volcanic activity.

This stunningly distinctive characteristic is the cause of olivine crystals created from volcanic activity.

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.

Investigating the cause of 20th Century warming is properly done in detection and attribution studies, which analyze the various forcings (e.g., solar variations, greenhouse gases or volcanic activity) and the observed time and space patterns of climate change in detail.

Investigating the cause of 20th Century warming is done in so - called detection and attribution studies, which analyze the various forcings (e.g., solar variations, greenhouse gases or volcanic activity) and the observed time and space patterns of climate change in detail.

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.

Thus, Victor the Troll, to contradict all that you wrote @ 221, «the dissipation of aerosols from any given eruption IS caused by a lack of volcanic activity,» and global temperatures CAN «rise above (the) level» «they would have been had the volcanoes not occurred» because the impact of previous volcanism would have also dissipated in the interval.

Volcanic activity wiggles up and down and causes temperature to wiggle up and down a little bit over time.

From what data exists about previous peroids of rapid climate change (i.e. climate change caused by an intrinsic mechanism such as a meteor impact, massive volcanic activity or human activity, as opposed to sun cycles), it seems that climate does show such behavior too.

First of all, the dissipation of aerosols from any given eruption is NOT caused by «a lack of volcanic activity,» where did you get that?

And good grief, a physical chemist claims climate change is caused by volcanoes, when there's no evidence that volcanic activity has changed.

If volcanic activity between 1980 and today had caused the global temperature to be 2 C cooler now than 1980, would Hansen have been falsified?

Of the five species die offs in the last 500 million years, three are suspected of being caused by warming that included high co2 atmospherics levels from high volcanic activity.

even as we are probably being propelled into a new ice age, by forces independent of human activity, the warming oceans, most probably largely caused by undersea volcanic activity in the pacific ocean, may cause a continuing warming trend in alaska.

Some proposed they're related to periods of intense volcanic activity, others that they were caused by continental drift and periods of mountain building.

A paper published in Environmental Research Letters by Rahmstorf, Foster, and Cazenave (2012) applied the methodology of Foster and Rahmstorf (2011), using the statistical technique of multiple regression to filter out the influences of the El Niño Southern Oscillation (ENSO) and solar and volcanic activity from the global surface temperature data to evaluate the underlying long - term primarily human - caused trend.

IN THE PAST, volcanic activity has caused a bigger outflow of CO2 et al than human activity directly.

The red line incorporates natural influences like changes in solar output and volcanic activity but virtually all of the long - term warming is attributable to human - caused increases in greenhouse gasses.

The galactic cosmic ray issue is not just about if it may cause an increase in clouds but how it may contribute to an increase in major volcanic activity which would have major climatic due to those items effecting albedo.

Salvatore, this I don't understand: «The galactic cosmic ray issue is not just about if it may cause an increase in clouds but how it may contribute to an increase in major volcanic activity...» I'm not aware of any physical mechanism of controlling ERFvolvano by ERFsolar.

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.

However, Raymo noted that the natural changes caused by volcanic eruptions, other geologic activities and variations in Earth's orbit take eons to unfold.

Results of the detection and attribution analysis shows that these declines are attributable to the anthropogenic forcing, which is dominated by the effect of increases in greenhouse gas concentration, and that they are not caused by natural forcing due to volcanic activity and solar variability combined.

12 * ICE AGES: More elliptical orbit causes less sunlight to reach Earth — results in ice ages (100,000 yr cycles) * VOLCANIC ACTIVITY: Release ash and aerosols into the atmosphere Reflects sun rays causing cooler temps * SOLAR ENERGY: Cause short term changes Less solar energy can cause small iceCause short term changes Less solar energy can cause small icecause small ice ages

The current thinking about the cause of the LIA is heightened levels of volcanic activity and a drop in solar activity.

Some scientists question the reliability of the observations, whereas others, who accept them as reliable, suggest that the correlation may be caused by other physical phenomena with decadal periods or by a response to volcanic activity or El Niño.

The various kinds of evidence examined by the panel suggest that the troposphere actually may have warmed much less rapidly than the surface from 1979 into the late 1990s, due both to natural causes (e.g., the sequence of volcanic eruptions that occurred within this particular 20 - year period) and human activities (e.g., the cooling of the upper part of the troposphere resulting from ozone depletion in the stratosphere).

The authors found that consistent with previous research, changes in solar and volcanic activity, land cover, and incoming solar radiation due to the Earth's orbital cycles were the main contributors to the cooling between the MWP and LIA (the years 900 — 1600), and probably also caused the cooling over the full 2,000 - year period.

The anomalously warm and cold periods are probably caused by the variation of volcanic & solar activities, land use changes and perhaps the change of oceanic circulation pattern, but the contribution of each component is not well understood.

Other leading theories to causes of mass extinctions include: global climate change, changes in sea level, chemical poisoning of the atmosphere and / or oceans, variation in solar radiation, and extreme volcanic activity.