Good source of climate change data

[popeyespappy]

...... claims you care to make about anthropic global warming......

anthropogenic?

Any warming while humans exist can be called anthropic warming.

Adjective: Anthropic
Relating to mankind or the period of mankind's existence

Adjective: Anthropogenic
Of or relating to the study of the origins and development of human beings

I've heard the terms used interchangeably in relation to global warming. Is the usage incorrect?

[Anomalocaris]

Anthropogenic is usually taken to mean "caused by humans". Anthropic usually means "related to humans". Everything Anthropogenic is by definition Anthropic, but vast majority of things Anthropic can not be said to be Anthropogenic in the sense used in Anthropogenic climate change.

[popeyespappy]

[ib.me.ub]

Climate Change itself isn't caused by humans, but the rate of change is.

Were there no human induced warming, "climate change at this time should be going in the opposite direction" from what is observed based on what we know of the long tern natural factors impacting on global climate.

Links please.

Roe G (2006). "In defense of Milankovitch". Geophysical Research Letters

The "Milankovitch Hypothesis" has neither been properly evaluted or verified. I would say it is a good source for skeptics to lean towards.

[Anomalocaris]

The "Milankovitch Hypothesis" has neither been properly evaluted or verified. I would say it is a good source for skeptics to lean towards.

Actually, Milankovich cycle predicts climactic condition over the last million years, as determined from Antarctic ice core samples, extremely well. The theory also predicts we should currently be in the first half of a period of downward trending global temperature. Milankovich cycle thus suggest agent(s) whose strength was not notable during much of last million years being responsible for the observed global temperature rise. Anthropogenic GHG, not present in strength except during last few hundred years, certainly seem like a worthy candidate.

As to whether the theory can be used for support by skeptics, it does not seem that way. But so what if it could? How a theory might be used is not a measure of the merit and validity of the theory. Rather, if a sound theory can be used to support a position not to one's liking, it is reason to adjust one's liking, not reason to dismiss the theory.

[ib.me.ub]

[Anomalocaris]

Milankovitch doesn't speak directly to human induced warming. It speaks to a pattern in the orbital dynamics of the earth that has been closely echoed by a pattern in the climate of the planet in the last million years. The correlation is strong. The causation is not completely worked out, but it seems enough has been worked out to form basis of predictive models

The different milankovitch predictive models seem to converge on the prediction that factors which had governed climate for the last million years should be driving global temperature in a lengthy downward trend starting in early Holocene, and that the trend will continue for tens of thousands more years. See J Imbrie, J Z Imbrie (1980). "Modeling the Climatic Response to Orbital Variations". Science 207 (1980/02/29): 943–953. And Berger A, Loutre MF (2002). "Climate: An exceptionally long interglacial ahead?". Science 297 (5585): 1287–8.

This is not what we observe. The closeness of the match between Milankovitch cycle and climate cycle over the bulk of last million years is such that deviation as we observe for the Holocene requires special explanation. One plausible explanation is anthropogenic GHG emission.

[ib.me.ub]

hmm, ok, interesting. I thought you were a skeptic.

[popeyespappy]

hmm, ok, interesting, cheers. I thought you were a skeptic.

Frankly I don’t get it. Being a skeptic doesn’t mean denial of a large body of evidence simply because it favors a position you don’t like.

[ib.me.ub]

don't know. Some people just don't care about evidence. Some people are afraid of the consequences and choose to beleive its not happeneing. Others focus on the argument against. The reasons are probably as varied as the opinions on the subject out there.