In the case of
anthropogenic influence on climate change, I have to strongly disagree with Gavin's assessment that «there are many uncertainties in many of the issues, but you will find all [emphasis is mine] of these outlined in the IPCC reports».
These scientists have found that, in the absence of any significant CO2 concentration changes or human influence during the Holocene (i.e., the last ~ 10,000 years), the deep oceans naturally warmed by more than 2 °C in a span of just 200 years, which is several times the rate in which they are alleged to have warmed in the last ~ 60 years of the supposedly
dominant anthropogenic influence on climate.
«In order to quantify
the anthropogenic influences on climate, we need accurate measurements of the natural climate - forcing agents, the most important of which is the sun,» associate professor Peter Pilewskie said.
Since then, anthropogenic influence has also been identified in a range of other climate variables, such as ocean heat content, atmospheric pressure and sea ice extent, thereby contributing further evidence of
an anthropogenic influence on climate, and improving confidence in climate models.
As Eli Rabett noted, the second assessment report of the IPCC concluded that «The balance of evidence suggests a discernible human influence on global climate (considerable progress since the 1990 report in distinguishing between natural and
anthropogenic influences on climate, because of: including aerosols; coupled models; pattern - based studies)»
Discussion about the «hockey stick» is conducted with considerable fervor in the public media, where this curve is often presented as if it were a proof, or even the most important proof, of
anthropogenic influence on climate.
But this does not stand in the way of him criticizing Gray (again rightly so) for his curmudgeonly scorn of current generation scientists, and in particular his somewhat irrational rejection of the science supporting
an anthropogenic influence on climate.
Detection and attribution analyses show robust evidence for
an anthropogenic influence on climate.
We estimate that the likelihood of summer mean WGBT exceeding the observed historical record value has increased by a factor of at least 70 at regional scales due to
anthropogenic influence on the climate.
Recognize the benefits, the positive externalities, associated with
the anthropogenic influence on climate.
Regional warming due to
anthropogenic influence on the climate is expected to increase the frequency of very warm years and seasons.
They first ran the simulation using only volcanic and
anthropogenic influences on the climate.
«Our results strengthen the case for
an anthropogenic influence on climate.