Sentences with phrase «mean volcanic activity»

Lewis and Curry gave an estimate of TCR based on changes from 1930 — 50 to 1995 — 2011, periods that were well matched for mean volcanic activity and AMO state, and which delineate a period over which forcing approximated a 70 years ramp.

What we do know is that the proposed forcing mechanisms — solar variability and mean volcanic activity — are small.

What we do know is that the proposed forcing mechanisms — solar variability and mean volcanic activity — are small.

Not exact matches

Over a long enough time scale, warmer temperatures mean increased volcanic activity, according to new research

This may have been triggered by a 250 - million - year lull in volcanic activity, which would have meant less carbon dioxide being pumped into the atmosphere, and a reduced greenhouse effect.

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.

Figure 1: Twelve - month running means of SOI (dark line) and MSU GTTA (light line) for the period 1980 to 2006 with major periods of volcanic activity indicated (McLean 2009).

Scientists say Mount Agung's volcanic activity could escalate further over the coming days, meaning planes could stay grounded with thousands unable to fly in or out of Bali.

To paraphrase the meaning of the two statuses: Level IV means «Beware: An Eruption Could be Imminent» and Level III means «Stand By: There is a Probability of Volcanic Activity».

So, by all means, attack me personally, change the subject, blow smoke, shift the goalposts, nitpick, do anything to divert from the obvious fact that the widespread claim regarding the warming effect of a lack of volcanic activity is simply wrong.

I particularly enjoyed the slides that, when combined (1) provided an overview of hotter and cooler CO2 molecules as it relates to how they are seen from outer space and from profile — because this will make it easier for me to explain this process to others; (2) walked through the volcanic and solar activity vs assigning importance to CO2 changes — because this another way to help make it clearer, too, but in another way; (3) discussed CO2 induced warming and ocean rise vs different choices we might make — because this helps point out why every day's delay matters; and (4) showed Figure 1 from William Nordhaus» «Strategies for Control of Carbon Dioxide» and then super-imposed upon that the global mean temperature in colors showing pre-paper and post-paper periods — because this helps to show just how far back it was possible to make reasoned projections without the aid of a more nuanced and modern understanding.

What he really means, of course, is that additional volcanic activity, had it taken place, would have added more aerosols, thus slowing the overall dissipation, which would in turn have enhanced the cooling effect of said aerosols.

The time series of solar and volcanic activities have been processed to show, mostly by means of statistical characteristics, the exceptional and recurring pattern of these phenomena in the intervals of the exceptional and recurring pattern of solar motion, i.e. in the intervals of the Sun's motion along the trefoils which reoccur in steps of 178.7 years.

Global solar irradiance reconstruction [48 — 50] and ice - core based sulfate (SO4) influx in the Northern Hemisphere [51] from volcanic activity (a); mean annual temperature (MAT) reconstructions for the Northern Hemisphere [52], North America [29], and the American Southwest * expressed as anomalies based on 1961 — 1990 temperature averages (b); changes in ENSO - related variability based on El Junco diatom record [41], oxygen isotopes records from Palmyra [42], and the unified ENSO proxy [UEP; 23](c); changes in PDSI variability for the American Southwest (d), and changes in winter precipitation variability as simulated by CESM model ensembles 2 to 5 [43].

The Moon hasn't had volcanic activity [other than minor out gassing - which is not what I mean by volcanic activity] for over a billion years.

Annual means of surface air temperature display similar longterm periodicity as the volcanic activity.

Natural disaster means earthquake, natural landslip, volcanic eruption, hydrothermal activity, tsunami or fire resulting from any of these.