More evidence on the Late Antique Little Ice Age in the 6th century common era

Apparently, there were at least two litte ice ages and at least two warming periods occurring in the pre-industrial era or during about the last two thousand years.

For this and other reasons, it appears quite likely that the current warming period is nothing unusual and mostly linked to natural causes. 

"... The Late Antique Little Ice Age (LALIA) was a long-lasting Northern Hemispheric cooling period in the 6th and 7th centuries AD, during the period known as Late Antiquity. The period coincides with three large volcanic eruptions in 535/536, 539/540 and 547. ..." (Wikipedia)

"... The main non-human impacts recorded by ecosystems correspond to the Late Antique Little Ice Age, defined by an average temperature anomaly of −2.04 ± 0.17 °C, exceeding the Pre-industrial Little Ice Age by −1.26 ± 0.16 °C in severity. The temperatures reconstructed for the Medieval Climate Anomaly are close to those recorded for the 20th century AD (average anomaly of 0.08 ± 0.15 °C) but they differ from the 21st century AD ..."

Northern Adriatic environmental changes since 500 AD reconstructed at Aquileia (Italy) - ScienceDirect (no public access)