The little ice age seemed to have spawned several
historical events. The site
https://www.history.com/news/little-ice-age-big-consequences notes significant
historical events such including a great famine, the black death, Manchu
conquest of China, witch hunts, the Thirty Years' War, and more.
Temperature variations spanning the last 2000 years reveal a significant period of warming (the Medieval Warm Period) preceded the Little Ice Age (see https://en.wikipedia.org/wiki/Little_Ice_Age).
During the Little Ice Age there was a period of reduced sunspot activity referred to as the Maunder Minimum. This period of reduced activity extended from about 1645 to 1750 with continuous monthly averages available since 1749. The figure below is taken from Robert A. Rohde as part of the Global Warming Art project. The Little Ice Age as shown above seems to be at its coldest between about 1400 and 1850.
The longer term view of solar activity (presented below) is obtained from 14C dating.
There is no clear association between the the variations in solar activity such as that documented for the Maunder minimum and terrestrial temperature variations. As we noted in the previous post, the variations of solar irradiance during the individual sunspot cycles is on the order of 0.1% of the total.However, solar activity inferred from Carbon 14 variations does reveal three periods of reduced solar radiation between 1300 and 1800 - the time encompassing the Little Ice Age. Isthere some form of positive feedback that could amplify the influence of periods of reduced solar irradiance?
Temperature variations spanning the last 2000 years reveal a significant period of warming (the Medieval Warm Period) preceded the Little Ice Age (see https://en.wikipedia.org/wiki/Little_Ice_Age).
During the Little Ice Age there was a period of reduced sunspot activity referred to as the Maunder Minimum. This period of reduced activity extended from about 1645 to 1750 with continuous monthly averages available since 1749. The figure below is taken from Robert A. Rohde as part of the Global Warming Art project. The Little Ice Age as shown above seems to be at its coldest between about 1400 and 1850.
The longer term view of solar activity (presented below) is obtained from 14C dating.
There is no clear association between the the variations in solar activity such as that documented for the Maunder minimum and terrestrial temperature variations. As we noted in the previous post, the variations of solar irradiance during the individual sunspot cycles is on the order of 0.1% of the total.However, solar activity inferred from Carbon 14 variations does reveal three periods of reduced solar radiation between 1300 and 1800 - the time encompassing the Little Ice Age. Isthere some form of positive feedback that could amplify the influence of periods of reduced solar irradiance?
No comments:
Post a Comment