I'm a scientist. There is always uncertainty. You've been told this before. Scientific advancements in knowledge don't stand still until something is known without doubt. I'll freely admit that the content that follows could be wrong. But someone has to show that to be true to change the story that the data is telling.
Now, if you want to know why anthropogenic is the best candidate given the evidence, well then that's a different story, and here is why:
A) We know that some gases absorb and re-emit radiation. Experimental evidence, lots of it, going back over 150 years. There's no reason to believe that thoses gases don't behave in the same fashion in our atmosphere. In fact we have satellites measuring the effect from space. Causal relationship.
Selected References:
The Bakerian Lecture: On the Absorption and Radiation of Heat by Gases and Vapours, and on the Physical Connexion of Radiation, Absorption, and Conduction
http://www.gps.caltech.edu/~vijay/Papers/Spectroscopy/tyndall-1861.pdf
Phys. Rev. 41, 291 (1932) - The Infrared Absorption Spectrum of Carbon Dioxide
Optics InfoBase: Journal of the Optical Society of America - Rotation-Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing Paths
Remote Sensing | Free Full-Text | Global Characterization of CO2 Column Retrievals from Shortwave-Infrared Satellite Observations of the Orbiting Carbon Observatory-2 Mission
Measurements of the downward longwave radiation spectrum over the Antarctic Plateau and comparisons with a line-by-line radiative transfer model for clear skies - Walden - 2012 - Journal of Geophysical Research: Atmospheres (1984–2012) - Wiley Onli
B) We know that the majority of carbon dioxide in the atmosphere is due to human activities. This can be confirmed with known inventories of fuel consumption, and the chemistry that happens with combustion of those fuels. Additionally, the isotope fraction confirms where the carbon dioxide comes from. We also know how much of the emissions are being absorbed by the ocean and terrestrial biosphere. The increase in atmospheric concentration is less than the yearly contributions of human activity. We know the source of the increases.
Selected References:
Annual Energy Review - Energy Information Administration
Linking emissions of fossil fuel CO2 and other anthropogenic trace gases using atmospheric 14CO2 - Miller - 2012 - Journal of Geophysical Research: Atmospheres (1984–2012) - Wiley Online Library
Observations of radiocarbon in CO2at La Jolla, California, USA 1992–2007: Analysis of the long-term trend - Graven - 2012 - Journal of Geophysical Research: Atmospheres (1984–2012) - Wiley Online Library
Atmospheric observations of carbon monoxide and fossil fuel CO2 emissions from East Asia - Turnbull - 2011 - Journal of Geophysical Research: Atmospheres (1984–2012) - Wiley Online Library
http://www.bgc.mpg.de/service/iso_gas_lab/publications/PG_WB_IJMS.pdf
http://www.ehleringer.net/Jim/Publications/349.pdf
http://radioviceonline.com/wp-content/uploads/2009/11/knorr2009_co2_sequestration.pdf
C) The radiative feedback expected from the contribution to the atmosphere has been confirmed. The absorption spectra where the radiation is being trapped has been measured from the ground and from orbiting satellites. The dominant bands are spectra where the principal greenhouse gases we're emitting are most active. We know which gases are absorbing, and we can quantify the effect.
Selected References:
http://ga.ifac.cnr.it/images/stories/niro_2005b%20jqrst.pdf
http://www.atmos.berkeley.edu/~inez/MSRI-NCAR_CarbonDA/papers/Bibliography%20-%20Miller/GRL%2032,%20%20L22803%20(2005)%20-%20Chahine%20-%20vanishing%20partial%20derivatives%20with%20application%20to%20CO2.pdf
Satellite remote sounding of mid-tropospheric CO2 - Chahine - 2008 - Geophysical Research Letters - Wiley Online Library
D) The planet has a net radiative imbalance, less energy escapes than the amount arriving from the sun. If less energy is escaping than is coming in, then something must be impeding the radiation from the surface. A fundamental first principle of enhanced greenhouse effect is a net energy imbalance. Concomitant with a net energy balance is a cooling stratosphere and warming troposphere. This has been confirmed by observations, including the skeptic friendly microwave sounding unit satellites. We have confirmation of first principles.
Selected References:
http://yly-mac.gps.caltech.edu/Reprintsyly/A_RecentPapers/Zjunk/Feldman05.pdf
https://www.locean-ipsl.upmc.fr/~ggalod/papers/GSDO2013_R2_v6.pdf
SPIE | Proceeding | A decade of measured greenhouse forcings from AIRS
http://research-information.bristol.ac.uk/files/3006745/paper.pdf
https://workspace.imperial.ac.uk/physics/Public/spat/John/Increase%20in%20greenhouse%20forcing%20inferred%20from%20the%20outgoing%20longwave%20radiation%20spectra%20of%20the%20Earth%20in%201970%20and%201997.pdf
E) We have measured the influence of all other known factors, and we know the planet is accumulating heat. Until such time as all of the above is overturned, the only conclusion supported by these facts is that human activity is the major contributor to the accumulating heat on this planet. And we know that the pace of changes and direction of the change is not consistent with Milankovitch cycles. The lag in temperature and carbon dioxide is due to the long response of the oceans, and the oceans are acidifying.
Selected References:
http://www.pnas.org/content/early/2013/08/21/1311433110.full.pdf
http://iopscience.iop.org/1748-9326/7/3/034020/pdf/1748-9326_7_3_034020.pdf
http://www.atmos.washington.edu/~mzelinka/Zelinka_Hartmann10.pdf
http://geotest.tamu.edu/userfiles/216/dessler10b.pdf
http://deepeco.ucsd.edu/~george/publications/09_long-term_variability.pdf
http://www.esrl.noaa.gov/psd/csi/images/GRL2009_GlobalTemp.pdf
http://www.benlaken.com/documents/GRL_LakenCalogvic11.pdf
http://www.europhysicsnews.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/epn/pdf/2010/01/epn20101p27.pdf
A cosmic ray-climate link and cloud observations | J. Space Weather Space Clim.
http://www.geology.wisc.edu/~smeyers/pubs/Meyers_et_al_2008.pdf
http://www.biogeosciences.net/9/2509/2012/bg-9-2509-2012.pdf
http://www.as.wvu.edu/biology/bio463/Pelejero%20et%20al%202010%20Paleo%20perspectives%20on%20ocean%20acidification.pdf
ftp://soest.hawaii.edu/coastal/Climate%20Articles/Acidification%20Pacific%20Byrne%202010.pdf
More energy is being trapped on Earth every year. We have experimental and observational confirmation of a causal mechanism. We have confirmation of the effects expected given our industrial activities. We have quantified the effects from spectroscopic measurements in the atmosphere. We have fingerprints that cannot be explained by the natural factors. The amount of uncertainty left in the radiative forcings is small.
That's called comprehensive. Enjoy the reading.
You're welcome to try reading this stuff too. :lol:
Derpy Pete has moved on from denial to anger. Next step is bargaining. Faggy smiles. :lol: