|Fig. 1 A seismograph becomes a trend-o-graph|
About 7.5 years ago I penned Global Warming & Volcanic Eruptions.
Shortly following that (about a month later), I began a series on the issue.
This series has covered the subject over the several years since its inception (Is A New Age Of Pressure Upon Us?, 2, 3, 4, 5, 6, 7, 8, 9, 10,11, 12); however the last post in this series (#12) took place almost a year ago.
So, today we continue the discussion of this important, overlooked, but strongly ongoing issue (Fig. 1).
II. Not Much
Mediocrity Mediacrity Has Changed
As the USGS reports, not much has changed, except perhaps that in the last few days
|Fig. 2 More graphs here|
As has been said, "All I know is just what I read in the papers, and that's an alibi for my ignorance." Will Rogers
Which in whole or in part can lead to a particular world view as to what is important and what is not ("The old newspaper adage, 'If it bleeds, it leads,' is as true today as it was a century ago." Peter Diamandis); thus, foreseeing an oncoming reality becomes less important than reacting to it once it has arrived, because the media disdains foresight as it clings to
III. Some New Insights On Old Insights
This series has focused on the reality that there is more than meets the eye concerning the actual nature of the impacts of sea level change.
For example, there is more than merely impacts to coast lines and coast line maps, more than refugees having to move further inland, and more than the ongoing and upcoming retreat of world seaports (The Extinction of Robust Sea Ports, 2, 3, 4, 5, 6, 7, 8, 9).
|Fig. 3 Humble Oil-Qaeda|
Those impacts concern both a decrease in pressure in some areas, as well as an increase of pressure in other areas.
One reason for that type of change is that the great weight of ice sheets releases pressure from the land beneath them as they melt and flow into the ocean.
Their watery residue then creates pressure in various far away places where their melt water has relocated to.
Not only that, the loss of their gravity, which was once pulling water toward and upon them, frees that large quantity of water from being bound up against them (The Gravity of Sea Level Change, 2, 3, 4).
This phenomenon is not limited to the waters around Greenland and Antarctica (Proof of Concept - 3).
That once-gravity-trapped water will then flow away from its place to decrease pressure there, but to increase pressure elsewhere (The Ghost-Water Constant, 2, 3, 4, 5, 6, 7, 8, 9).
"So what?" you may wonder.
IV. The Answer
The previous question is answered by "glacial isostatic adjustment (GIA)" as discussed in Mitrovica, et al., (2015), a PDF file.
The bidirectional up and down GIA causes torque, stress, and tension between crustal movement upwards and crustal movement downward.
Likewise, the speed-up and slow-down of the Earth's rotation, as a result of those changes in the Earth's shape, also cause additional torque, stress, and tension on the crust (ibid).
Those rotational speed changes cause changes in shape that engender a shape that is closer to a perfect globe, for awhile, then other speed changes make further changes to a shape that is closer to an imperfect globe shape.
Those contortions and changes force, in various degrees, a release of impediments to earthquakes and volcanism in some places, while impeding, in various degrees, earthquakes and volcanism in other areas.
Remember that the 1750 Industrial Revolution began to inject greenhouse gases into the atmosphere long ago, which has increased climate and sea level change since then.
As the graphs in earlier posts of this series show, seismic and volcanic activity have also increased during this, the Anthropocene (Fig. 2).
The previous post in this series is here.
Who knew (Fig. 3)?