Cooling climate

[tynevalleysnow]

Just read the book Cold sun by John Casey. Some convincing evidence that we are heading into a climate like the Dalton minimum. Plenty of top climate and solar scientists agree and even NASA forecasting sun cycle 25 to be a grand solar minimum. The book was released in 2011 and the signs he mentioned in the book have happened. Anyone else with any thoughts regarding this?

[knocker]

Just read the book Cold sun by John Casey. Some convincing evidence that we are heading into a climate like the Dalton minimum. Plenty of top climate and solar scientists agree and even NASA forecasting sun cycle 25 to be a grand solar minimum. The book was released in 2011 and the signs he mentioned in the book have happened. Anyone else with any thoughts regarding this?

 

Haven't read the book so can't really comment. Perhaps some expansion on, "some convincing evidence that we are heading into a climate like the Dalton minimum" may help.

[Gray-Wolf]

I suppose such thoughts might have made sense before we discounted the notion that the sun alone could be instrumental in such changes? Surely we all now know , well enough?, that it takes a combination of GHG's, particulate and sulphate atmospheric inclusions and solar ( along with 'natural cycles' of course!).

 

Today our GHG burden is heading towards twice that of the Dalton min, we see Asia beginning to clean up it's emissions and Natural cycles are heading toward a switch positive. We also have an Arctic that has become a positive energy forcing over late spring, summer and early autumn ?

 

Sadly we cannot look to the heavens for help.

[UV-RAY]

It's a fluid situation, so until we start the next solar cycle we won't know as of yet.

[Methuselah]

Haven't read the book so can't really comment. Perhaps some expansion on, "some convincing evidence that we are heading into a climate like the Dalton minimum" may help.

A global fall of temperature would be ideal evidence, too...

[UV-RAY]

A global fall of temperature would be ideal evidence, too...

Now, now are you saying the LIA was global, because if not then why would this be. Personally I think the. LIA was global and it's only a lack of reliable proxies in the SH which says different. Still we have a real time lab event so one way or the other we will all find out. Edited January 3, 2014 by Sceptical Inquirer

[knocker]

I thought the DM was global and strongly influenced by volcanism. Tambora came in the middle.

 

 

Abstract

The Dalton Minimum (1790–1830) was a period with reduced solar irradiance and strong volcanic eruptions. Additionally, the atmospheric CO₂ concentrations started to rise from the background level of previous centuries. In this period most empirical climate reconstructions indicate a minimum in global or hemispheric temperatures. Here, we analyse several simulations starting in 1755 with the coupled atmosphere-ocean model ECHO-G driven by different forcing combinations to investigate which external forcing could have contributed most strongly to the reduced temperatures during the Dalton Minimum. Results indicate that on global and hemispheric scales, the volcanic forcing is largely responsible for the temperature drop in this period, especially during its second half, whereas changes in solar forcing and the increasing atmospheric CO₂ concentrations were of minor importance. At regional scales, especially the extratropical, the impact of volcanic forcing is much less discernible due to the large regional variability, a finding that agrees with empirical temperature reconstructions.

 

http://link.springer.com/article/10.1007%2Fs00382-005-0029-0#page-1

Edited January 3, 2014 by knocker