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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Wilkins Ice Shelf disintegrating
On Thu, 27 Mar 2008 10:26:18 -0500, Cliff wrote:
On Wed, 26 Mar 2008 22:49:45 -0800, Bill Ward wrote: "Accumulation of large amounts of carbon dioxide in the atmosphere leads to the cooling, and not to warming of climate, as the proponents of traditional anthropogenic global warming theory believe (Aeschbach-Hertig, 2006). This conclusion has a simple physical explanation: when the infrared radiation is absorbed by the molecules of greenhouse gases, its energy is transformed into thermal expansion of air, which causes convective fluxes of air masses restoring the adiabatic distribution of temperature in the troposphere." Do you disagree with their conclusion, and if so, could you explain specifically why? To get the claimed "thermal expansion" it first has to get hotter, right? And you say that hotter is colder, right? Adding heat to a region can indeed cause localized cooling in another region. Absorption refrigerators rely on this. They're common in RV's. A propane flame or electric heater keeps yer icecubes frozen. The old Servel gas refrigerators also used this principle, and the central air in my parents' house (50 years ago) ran on natural gas. Expensive to install but cheap to operate. |
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Wilkins Ice Shelf disintegrating
On Sun, 30 Mar 2008 00:01:43 -0600, Don Foreman
wrote: On Thu, 27 Mar 2008 10:26:18 -0500, Cliff wrote: On Wed, 26 Mar 2008 22:49:45 -0800, Bill Ward wrote: "Accumulation of large amounts of carbon dioxide in the atmosphere leads to the cooling, and not to warming of climate, as the proponents of traditional anthropogenic global warming theory believe (Aeschbach-Hertig, 2006). This conclusion has a simple physical explanation: when the infrared radiation is absorbed by the molecules of greenhouse gases, its energy is transformed into thermal expansion of air, which causes convective fluxes of air masses restoring the adiabatic distribution of temperature in the troposphere." Do you disagree with their conclusion, and if so, could you explain specifically why? To get the claimed "thermal expansion" it first has to get hotter, right? And you say that hotter is colder, right? Adding heat to a region can indeed cause localized cooling in another region. Absorption refrigerators rely on this. They're common in RV's. A propane flame or electric heater keeps yer icecubes frozen. The old Servel gas refrigerators also used this principle, and the central air in my parents' house (50 years ago) ran on natural gas. Expensive to install but cheap to operate. Mo a bit of stirring (convective flux) could certainly have a cooling effect. Avg temp at a mere 20K feet is below zero F, and considerably colder at 30K feet. These altitudes are within the troposphere. |
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