The authors find "Dry spells, even more severe than the 1920s drought, occurred during AD 1139–1152, 1294–1309, 1446–1503 and 1708–1726," but that there is nothing unusual or unprecedented about current levels of precipitation.
Precipitation variations and possible forcing factors on the Northeastern Tibetan Plateau during the last millennium
Monday, October 28, 2013
New paper finds the Sun controlled precipitation in Tibet over past millennium
A new paper published in Quaternary Research reconstructs precipitation over the past 1,000 years on the Northeastern Tibetan Plateau and finds precipitation may have been controlled by solar activity and the natural Pacific Decadal Oscillation [PDO]. According to the authors, the precipitation data "suggests possible linkage with solar variation and the Pacific Decadal Oscillation (PDO). [The precipitation proxy] also shows coherent patterns with solar irradiance variation: the precipitation tends to reach low values during the well-known solar minimum." The paper adds to many others finding solar activity correlated to precipitation, droughts, and floods over the past several millenia.
Posted by MS at 8:22 AM