Headline at Ice Age Now blog:
Volcanism alone can explain the Little Ice Age (LIA), researchers insist. Low sunspot activity is not the culprit.
Precisely dated records of ice-cap growth from Arctic Canada and Iceland show that “Little Ice Age summer cold and ice growth began abruptly between 1275 and 1300 AD, followed by a substantial intensification 1430–1455 AD,” researchers found.These intervals of sudden ice growth coincide with two of the most volcanically perturbed half-centuries of the past millennium, the study shows. “Explosive volcanism produces abrupt summer cooling at these times.”“Our results suggest that the onset of the LIA can be linked to an unusual 50-year-long episode with four large sulfur-rich explosive eruptions, each with global sulfate loading >60 Tg.
”Once the ice age was triggered, cold summers were maintained by sea-ice/ocean feedbacks long after volcanic aerosols were removed. the authors assert. “Large changes in solar irradiance are not required.
“Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea-ice/ocean feedbacks,” published on 31 January 2012
From a comment on the Ice Age Now Post:
From what I see on this page it sounds like the researchers are not aware of what causes the increased volcanic activity and earthquakes in the first place. Namely a very weak solar cycle is directly linked to a substantial increase in volcanic activity. The “experts” are still having a hard time connecting the dots.
I have published the graphic below several times showing an increase in volcanic activity during grand minimums. The question is still open, how does a quiet sun cause an increase in volcanic activity on the earth?
Your thoughts are most welcome? What is the solar connection to earthquakes on the planet? It looks like the sudden cool down starts before the plethora of volcanic eruptions on the chart. Does the cooling cause eruptions?