Sentences with phrase «documented sharp drops»

Not exact matches

Looking further back, the paleo reconstructions also do not replicate the considerable drop to the depths of the LIA around 1690, the (reconstructed) warmth around 1630, the period of well documented cold at the beginning of the 17th century and the sharp (reconstructed) rise around 1540 to something apparently approaching the temperatures at the end of the 20th century.