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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: tejek who wrote (150655)	8/29/2002 4:23:58 PM
From: TimF	Read Replies (1) \| Respond to of 1585485

Tim, global temps are not taken in the middle of cities. So how could warmer city temps. exaggerate global temps? The data for global temps is just a combination of the local temp data. Historically a lot of the local temp data was taken near cities. Many of those areas near cities are now in the cities or in very built up suburbs when they where once rural or semi-rural. We have more sites now and we have satellite temp readings (which BTW show less warming then the terrestrial readings) but most of the observed warming in the 20th century happened before 1940 (interestingly the warming happened when CO2 emissions where much lower). Secondly, the point of the article was not that it was a few degrees warmer over cities but rather the effect these increased temps have on weather. Yes you said that about 3 times already. I don't know why I have to limit my comments to the theme of the author of the article. The fact that it does have an effect on city weather insures that rising global temps effects weather globally. Have you thought about what that those effects might be? Except for the possibility of rising water levels most of the effects would be less intense (less severe over any particular area, but spread out over a the whole world so the total problem would be worse), unless the warming is very uneven then the effects might be similar to the effects observed in and near the cities. Tim