vincentML -> RE: Heat released by the industrial revolution directly causes global warming. (1/5/2010 3:15:23 PM)
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ORIGINAL: asyouwish72 Wow. How'd that get past peer review? Does this journal even do peer review? Let's see... from publicly available sources: Total present-day annual energy consumption per year(by far the highest ever): 5*10^20 joules (thanks, BP) Incident solar energy flux to earth = 174 petawatts (10^15 watts... that's a lot of watts) 1 watt = 1 joule/second 365 * 24 * 60 *60 seconds/year = 3.15*10^7 seconds/year so... Incident solar energy/year = about 5.5 * 10^24 joules All human energy consumption NOW is less than 1/10,000th of the incident solar energy. Not all of that consumption is heat, a lot of it goes to push around trucks/ships/airplanes etc as work- heat is most often just a waste product to be minimized. In the fairly recent past, human energy consumption was very much less, so the 'cumulative effect' since the industrial revolution is consequently very much smaller than these figures (modest as the are) would suggest. The heat we generate is not the issue- small changes to the earth's radiative balance are. That's why the uninhabited poles are the places showing the most rapid warming- they are the places where the earth typically has the most negative radiative balance (more energy going out than coming in... it's the loss term that greenhouse gasses change slightly). If it was just heat from combustion, the places with the highest population densities would be the epicenters of warming. If these guys are legit, I'd like to know what they are smoking. Your comparison of incident solar energy vs human consumption seems flawed because most human consumption is fossil fuel - ancient solar energy, so it is not an apples to apples comparison. Very little, near zero current incident solar energy is in play. It comes and goes except for that captured by chlorophyll and that absorbed and converted to heat but has no industrial value. I think your last argument is far more compelling, matching the heat from industrial consumption with population centers. The counterpoint is of course that CO2 goes everywhere. Just my 2 cents.
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