I had intended to stay away from this thread, but there are a couple things that I think should be addressed. One is that scientists "believe" in global warming. I've been involved in the larger aspect of that--global environmental change, of which global warming is an aspect-- for pretty much all of my years in science. Because of the way I was educated, I came to "accept" things in science, so long as they worked and set them aside when they didn't. I don't know of any scientists in the Global Environmental Focus Group of the American Geophysical Union who uses "believe" as part of the language of science, even if we might know what that person actually meant. It's hard enough to relate to the public on science issues without interjecting what they might see as a misguided belief. This is particularly true with climate science/global warming/global environmental change. On a broader platform, I suggest reading this piece by Helen Quinn, that appeared in Physics Today:
https://ned.ipac.caltech.edu/level5/March07/Quinn/Quinn.html
Belief and knowledge - a plea about language
That being said, there are some interesting developments regarding the Little Ice Age and the Maunder Minimum and a controversy that developed about relating a possible coming ice age and a Maunder Minimum.
http://onlinelibrary.wiley.com/doi/10.1029/2011GL050168/full
Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea-ice/ocean feedbacks
"Here we present precisely dated records of ice-cap growth from Arctic Canada and Iceland showing that LIA summer cold and ice growth began abruptly between 1275 and 1300 AD, followed by a substantial intensification 1430–1455 AD. Intervals of sudden ice growth coincide with two of the most volcanically perturbed half centuries of the past millennium...Our results suggest that the onset of the LIA can be linked to an unusual 50-year-long episode with four large sulfur-rich explosive eruptions, each with global sulfate loading >60 Tg. The persistence of cold summers is best explained by consequent sea-ice/ocean feedbacks during a hemispheric summer insolation minimum; large changes in solar irradiance are not required."
http://www.livescience.com/51597-maunder-minimum-mini-ice-age.html
Is a Mini Ice Age Coming? 'Maunder Minimum' Spurs Controversy
"At the National Astronomy meeting in Llanduno, north Wales last week, Zharkova said that a series of solar phenomena will lead to a "Maunder Minimum," which refers to the seven decades, from 1645 to 1715." [That meeting was in July. 2015]
http://phys.org/news/2015-07-mini-ice-age-hoopla-giant.html
The 'mini ice age' hoopla is a giant failure of science communication
We followed the story from the beginning--from her original talk to subsequent spinning by Zharkova--and saw that there was a rising "belief" in the popular press that sun activity and a cooling or possible ice age was looming. No one ever mentioned that in 1610, Momotomba in Nicaragua erupted and its cooling effects on the Northern hemisphere, well before the solar influences.
This is not to say that solar activity is not significant, just that cooling was already happening.