This can partly be attributed to the Medieval Warm Period.

There is much debate over whether the Medieval Warm Period was global in extent or not.

This era is known as the Medieval Warm Period.

The last period of similar activity occurred during the Medieval Warm Period.

Those mild centuries are termed the Medieval Warm Period.

The massive decline in sea ice during the Medieval Warm Period would have had a devastating impact upon their way of life.

North America experienced at least four megadroughts during the Medieval Warm Period.

From c. 1150 to 1300, the Medieval Warm Period allowed cultivation at greater heights and made land more productive.

The causes of the Medieval Warm Period remain unclear, and there is debate over what the actual temperatures were.

A favourite of climate "sceptics," the Medieval Warm Period, is also referenced in the report.

He also said that the debate had not been settled over whether the Medieval Warm Period was warmer than the current period.

That trick has been used to disguise recent falls in temperature and to contain the problem of the Medieval Warm Period.

Modern temperatures already exceed those of the Medieval Warm Period, said Swetnam.

It said that the Medieval Warm Period predated industrial greenhouse gas emissions, and had a natural origin.

The transition from the Medieval Warm Period to the Little Ice Age.

The Medieval Warm Period followed the Norman conquest.

Fagan notes that this time coincides with the Medieval Warm Period, which might have caused droughts.

He developed early theories about the Medieval Warm Period and Little Ice Age.

The Medieval Warm Period begins.

Historians refer to this as the "Medieval Warm Period", lasting from about the 10th century to about the 14th century.

The paper asserted that the late Middle Ages, previously described as a "Medieval Warm Period," was actually quite cold.

When a climate change (which later resulted in the Medieval Warm Period) took place Frösön acquired the position as regional centre.

They also found that a Medieval Warm Period did occur there between 620 and 1150 A.D., during which conditions were above freezing.

Possible causes of the Medieval Warm Period include increased solar activity, decreased volcanic activity, and changes to ocean circulation.

Even with this increase, the maximum it showed for the Medieval Warm Period did not reach temperatures recorded in central England in 2007.

The Medieval Warm Period (MWP) or Medieval Climate Optimum was a time of unusually warm climate in the North Atlantic region.

Some refer to the event as the Medieval Climatic Anomaly because this term emphasizes that effects other than temperature were important.