In summary, global mean temperatures in the year 2100 would most likely be diminished by about 0.1°C

• The Sun is “the dominant source of energy for Earth’s climate system” as the GRL paper notes, but “changes associated with solar variability are small” and “their contribution to recent warming is negligible” (see links below).
• 2010 was tied with 2005 as the hottest year on record in spite of coming at the end of “ the deepest solar minimum in nearly a century.”
• As NASA wrote during the deep 2009 minimum, “let’s assume that the solar irradiance does not recover. In that case, the negative forcing, relative to the mean solar irradiance is equivalent to seven years of CO2 increase at current growth rates. So do not look for a new ‘Little Ice Age’ in any case.”