More settled science: Volcanoes may have caused the Little Ice Age that Phil Jones didn't believe in

Study may answer longstanding questions about Little Ice Age | UCAR

BOULDER -- A new international study may answer contentious questions about the onset and persistence of Earth’s Little Ice Age, a period of widespread cooling that lasted for hundreds of years until the late 19th century.

The study, led by the University of Colorado Boulder with co-authors at the National Center for Atmospheric Research (NCAR) and other organizations, suggests that an unusual, 50-year-long episode of four massive tropical volcanic eruptions triggered the Little Ice Age between 1275 and 1300 A.D. The persistence of cold summers following the eruptions is best explained by a subsequent expansion of sea ice and a related weakening of Atlantic currents, according to computer simulations conducted for the study.

...The researchers set solar radiation at a constant level in the climate models.

Flashback: 2007: Phil Jones says it's important "not to cling to outdated concepts of the past such as the MWP and LIA" [Medieval Warm Period and Little Ice Age]