Venus, Earth global warming ozone shield component

[newtonian]

Has destruction of earth’s ozone layer caused cooling of that section of earth’s atmosphere and a corresponding warming of earth’s surface?<br /><br />I noted this possibility when comparing the extreme variation of earth’s upper atmosphere temperature profile compared with Mars and Venus which have no radiation absorbing, and hence heating, ozone shield.

 

[nexium]

The lack of responce indicates one or more defects in your question.The upper atmosphere of Earth has trace amounts of ozone. Ozone is a greenhouse gas, so ozone warms the Earth perhaps a millionth of a degree. The distruction of ozone cools the Earth perhaps a billionth of a degree.<br />Neil

 

[newtonian]

Neil - Ozone's effect as a greenhouse gas, as you note, is negligible. <br /><br />Ozone's effect on heating earth's upper atmosphere is (was) dramatic. <br /><br />Apparently other posters are not aware of the facts, so I will post a few of them: <br /><br />From "The World of Science," Volume 7 entitled "The Solar System," 1991, has a diagram comparing the atmospheres of Venus, Mars and Earth. <br /><br />The x axis is temperature in degrees Kelvin. <br />[Note: 273K = 0 C = 32 F; C&K degrees are 9/5 larger than degrees F per degree] <br />The y axis is altitude in kilometers. <br /><br />Mars has little atmosphere so temperatures do not vary as much as Venus and Earth. Mar's mean surface temperature is about 200 K, though it varies from 132K at winter pole to 300K maximum at equator. The atmosphere heats the surface less than 10 degrees K because it is so tenuous (thin). <br /><br />Mar's atmosphere cools to about 30km elevation to about 140 K, then hold steady to about 80 km, then increases to about 280 K at 200 km and hold fairly steady above that elevation. <br /><br />Venus has an extremely thick atmosphere and a pronounced greenhouse effect that heats the surface to about 780 K. The atmosphere cools rapidly with elevation to almost the same as Mars and Earth at about 75 Km, where the temperature cools to about 150 K. At that point Venus' atmosphere has a dramatic day-night temperature variance which peaks about 150 km in altitude where it is about 80 K at night and 270 K during the day. <br /><br />Earth has a moderately warmer surface than Mars, about 35 K warmer due to the atmosphere (compared with <10K atmospheric warming on Mars) than it would be with no atmosphere. <br /><br />At about 75 km in altitude, Earth's atmosphere is about the same temperature as Venus and Mars, cooling to about 180 K at 85 km. <br /><br />However, there is a dramatic rise in temperature in earth's upper atmosphere, way faster and higher than either Venus or Mars. This diagram has earth's upp

 

[newtonian]

No takers?<br /><br />It seems to me that if the radiation causing heating is being absorbed less by ozone in the upper atmosphere, it would then be absorbed more on earth's surface causing heating.<br /><br />Hence just adding to global warming.<br /><br />This could be one reason why polar regions are warming more dramatically - in view of the increased ozone depletion in polar areas compared with the tropics.

 

[newtonian]

A recent broadcast - I think it was the weather channel - confirmed that the ocean's surface has warmed recently.<br /><br />The warming was, however, less than the warming of arctic regions like Alaska. Something like 3 degrees for Alaska and 1 degree for ocean surface.<br /><br />Why would the higher lattitudes have more global warming?<br /><br />Could it be partly because ozone depletion is greater at higher latitudes?