This consisted of a weakening and expansion of the Hadley cells and a poleward shift of the Ferrel cells.
As study co-author Peter Godfrey-Smith describes in his book on octopus intelligence Residents of Octopolis are often harried by sharks, fish and other predators when they ventured out into the open waters.
Their dens, however, seemed to provide them safe haven.
Octopuses were once considered solitary creatures, thought to roam the depths alone, meeting only to mate.
But recent discoveries have begun to overturn that assumption, however.
The atmosphere blocks about 77 percent of the Sun’s UV, almost entirely in the shorter UV wavelengths.
The significance of Figure 4 is that it shows that EUV has fallen to levels of solar minima.
As more shellfish get eaten and discarded, the midden grows, allowing more octopuses to build dens and begin discarding shellfish in turn.
Geoffrey-Smith refers to the octopuses in the two cities as “ecosystem engineers,” given that they have essentially landscaped their surroundings to create a more hospitable environment.
Generally, weak solar cycles, such as Solar Cycle 24, are long cycles.
If Solar Cycle 24 ends up being 12 years long, which would take it to the edge of the graph, then it has another three years to go.
Now it seems the opposite is happening with EUV dropping rapidly over the last two years as shown by the Lyman Alpha solar index: Figure 4: Lyman Alpha Solar Index solar cycles 22, 23 and 24 aligned on minima The Lyman-alpha line is a spectral line of hydrogn emitted when the electron fall from the n=2 orbital to the n=1 orbital, where n I s the principal quantum number.