A 2000-year context for modern climate change

Although considerable attention has been paid to the record of temperature change over the last few centuries, the range and rate of change of atmospheric circulation and hydrology remain elusive. Here, eight latitudinally well-distributed (pole-equator-pole), highly resolved (annual to decadal) climate proxy records are presented that demonstrate major changes in these variables over the last 2000 years. A comparison between atmospheric C-14 and these changes in climate demonstrates a first-order relationship between a variable Sun and climate. The relationship is seen on a global scale.