# A question about global warming **URL:** \ **Category:** Factual Questions\ **Created:** [February 14, 2017, 9:31pm UTC](https://boards.straightdope.com/t/a-question-about-global-warming/779851 "2017-02-14T21:31:49Z")\ **Posts on this page:** 4\ **Page:** 2
**Author:** ![watchwolf49](https://avatars.discourse-cdn.com/v4/letter/w/e9c0ed/32.png) [@watchwolf49](https://boards.straightdope.com/u/watchwolf49)\ **Post date:** [February 16, 2017, 1:13am UTC](https://boards.straightdope.com/t/a-question-about-global-warming/779851/21 "2017-02-16T01:13:21Z")
All this CO[sub]2[/sub] is released through the Cascadia volcanoes … of which only one has been active these past hundred years … volcanoes associated with subduction zones are erupting all the time all over the world … all the CO[sub]2[/sub] emitted into the atmosphere is accounted for in the 280 ppmv portion of the total CO[sub]2[/sub] … Or are you suggesting a major eruptive event on the order of the Siberian Traps at the K-T boundary … I’m sorry … there’s subduction zones all over the world … best you’ll get is a Toba type eruption and that will only be enough to kill off all the humans … no great loss in the grand scheme of things … ---
**Author:** ![Grey](https://avatars.discourse-cdn.com/v4/letter/g/b782af/32.png) [@Grey](https://boards.straightdope.com/u/Grey)\ **Post date:** [February 16, 2017, 2:10am UTC](https://boards.straightdope.com/t/a-question-about-global-warming/779851/22 "2017-02-16T02:10:25Z")
Just for kicks, here’s the [abstract](http://www.sciencedirect.com/science/article/pii/S0012821X16307543/), with a little bolding added for clarity. > [@](#): > > We report from converted seismic waves, a pervasive seismically anomalous layer above the transition zone beneath the western US. The layer, characterized by an average shear wave speed reduction of 1.6%, spans over an area of ∼1.8×106 km2∼1.8×106 km2 with thicknesses varying between 25 and 70 km. The location of the layer correlates with the present location of a segment of the Farallon plate. This spatial correlation and the sharp seismic signal atop of the layer indicate that the layer is caused by compositional heterogeneity. Analysis of the seismic signature **reveals that the compositional heterogeneity can be ascribed to a small volume of partial melt (0.5 ± 0.2 vol% on average).** This article presents the first high resolution map of the melt present within the layer. Despite spatial variations in temperature, the calculated melt volume fraction correlates strongly with the amplitude of P–S conversion throughout the region. Comparing the values of temperature calculated from the seismic signal with available petrological constraints, **we infer that melting in the layer is caused by release of volatiles from the subducted Farallon slab**. This partially molten zone beneath the western US can sequester at least 1.2×1017 kg1.2×1017 kg of volatiles, and **can act as a large regional reservoir of volatile species such as H or C** As for **Pearl** ’s “could cause climate CHAOS”, that would be about as factual as stating that the massive reserve of water to the left of California spells flooding disaster. ---
**Author:** ![watchwolf49](https://avatars.discourse-cdn.com/v4/letter/w/e9c0ed/32.png) [@watchwolf49](https://boards.straightdope.com/u/watchwolf49)\ **Post date:** [February 16, 2017, 2:30am UTC](https://boards.straightdope.com/t/a-question-about-global-warming/779851/23 "2017-02-16T02:30:11Z")
Dropping the Farallon Plate on top of NYC would snarl traffic for a few days … ---
**Author:** ![Weisshund](https://avatars.discourse-cdn.com/v4/letter/w/ba8739/32.png) [@Weisshund](https://boards.straightdope.com/u/Weisshund)\ **Post date:** [February 17, 2017, 12:06am UTC](https://boards.straightdope.com/t/a-question-about-global-warming/779851/24 "2017-02-17T00:06:54Z")
> [@NadaHappyCamper](#): > > My question: Were the internal temp. of the EARTH to rise, would the resultant increase in heat radiating outward be significant to add to global warming? No. What would add to it would be the probable rise in volcanic activity, more active volcanoes means more nature induced greenhouse effect. Probably be accelerated tectonic activity too. But i doubt you would just straight radiate enough heat outwards [Previous page](https://boards.straightdope.com/t/a-question-about-global-warming/779851.md?page=1)