Brightness Increase Playing a Minor Role in Warming
The Sun today
Using satellite data, a solar physicist at the Naval Research Lab in Washington says that changes in the sun are indeed contributing to global warming, but to a smaller extent than human activity.
Speaking to a group of petroleum geologists from The American Association of Petroleum Geologists (AAPG), Dr. Judith Lean said that her findings showed that the sun is a factor of 10 less than the Anthropogenic, according to the Reuters article. One of her earlier reports noted a secular total irradiance increase of 0.08% during the past three centuries.
Dr. Lean had also previously stated that since 1885, global warming in response to changes in the sun's brightness is thought to have been less than 0.25 degrees celsius.
Note: I looked for the actual report from the Naval Research Lab or Dr. Lean, but I had no luck. Most of what I saw were older reports from the past few years.
