Analysis of 2,000 years of climate records finds global cooling trend ended in the 19th century

The most comprehensive evaluation of temperature change on Earth's continents over the past 1,000 to 2,000 years indicates that a long-term cooling trend -- caused by factors including fluctuations in the amount and distribution of heat from the sun, and increases in volcanic activity -- ended late in the 19th century.

Fuente : http://www.eurekalert.org/pub_releases/2013-04/nsf...