non-anthropogenic

In the past, temperature has first risen slightly through non-anthropogenic causes (orbit etc ...) which then releases CO2 and starts a feedback loop.

Jack Schmitt on Global Warming - NASA Watch 2009

Climate history shows that non-anthropogenic rapid climate shifts can occur.

Global Warming, Arnold Kling | EconLog | Library of Economics and Liberty 2009

The argument would be that there non-anthropogenic factors are sufficiently strong and going in the opposite direction to offset the impact of the human CO2 emissions.

Scientific Consensus or Religious War?, Arnold Kling | EconLog | Library of Economics and Liberty 2009

An important unresolved question is whether fire (mostly anthropogenic) or pre-monsoon drought stress (non-anthropogenic) is primarily responsible for limiting species diversity in these places.

Kayah-Karen montane rain forests 2008

These changes took place at a time when non-anthropogenic forcing factors i.e. the sum of solar and volcanic forcing would be expected to have produced cooling, not warming.

Think Progress » 13% of Americans have never heard of global warming, 2007

Several caves exhibit beach deposits, which were followed by several phases of non-anthropogenic sediment, mostly in the form of Aeolian wind sands.

Pinnacle Point (SA): Home to Fine Seafood Dining since 161993 BCE 2007

Now, this could be the advent of a new “natural” cycle, but it certainly is not part of any known non-anthropogenic climate cycle.

The Volokh Conspiracy » Bjorn Lomborg’s Cool It: 2007

Several caves exhibit beach deposits, which were followed by several phases of non-anthropogenic sediment, mostly in the form of Aeolian wind sands.

Archive 2007-10-01 2007

Seems reasonable to look, then, for non-anthropogenic causes for the recent temp rise.

The Volokh Conspiracy » Bjorn Lomborg’s Cool It: 2007

“These changes took place at a time when non-anthropogenic factors i.e. the sum of solar and volcano forcing would be expected to have produced cooling, not warming”

Think Progress » Bush Administration Has Pressured Half Of Gov’t Scientists To Downplay Global Warming 2007