Re: (OT) : Global Warming a Natural Cyclic Trend -or- Caused by Mankind ?

~ RHF wrote:
On Apr 2, 9:27 am, dave <d...@xxxxxxxxx> wrote:
Billy Burpelson wrote:

Telamon wrote:
And you can read about it here on the NASA web site.
<http://science.nasa.gov/headlines/y2009/01apr_deepsolarminimum.htm>
dave wrote:
What more could they possibly add?
- - That we may be experiencing the beginning
- - of another "Maunder Minimum"?

The Maunder Minimum
http://en.wikipedia.org/wiki/Maunder_minimum

The Little Ice Age (LIA)
http://en.wikipedia.org/wiki/Little_Ice_Age

While not a true ice age, the term was introduced into scientific literature by François E. Matthes in 1939.[1] Climatologists and historians working with local records no longer expect to agree on either the start or end dates of this period, which varied according to local conditions. Some confine the Little Ice Age to approximately the 16th century to the mid 19th century.[2] It is generally agreed that there were three minima, beginning about 1650, about 1770, and 1850, each separated by slight warming intervals.[3]

It is not certain if the LIA was a global phenomenon. The Intergovernmental Panel on Climate Change (IPCC) describe areas affected by the LIA; "Evidence from mountain glaciers does suggest increased glaciation in a number of widely spread regions outside Europe prior to the 20th century, including Alaska, New Zealand and Patagonia (Grove and Switsur, 1994). However, the timing of maximum glacial advances in these regions differs considerably, suggesting that they may represent largely independent regional climate changes, not a globally-synchronous increased glaciation" with "a modest cooling of the Northern Hemisphere during this period of less than 1°C," and suggests that "current evidence does not support globally synchronous periods of anomalous cold or warmth over this timeframe, and the conventional terms of 'Little Ice Age' and Medieval Warm Period appear to have limited utility in describing trends in hemispheric or global mean temperature changes in past centuries. "
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