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

To: Bonefish who wrote (1023898)	7/6/2017 9:07:37 PM
From: Land Shark	Read Replies (1) \| Respond to of 1576760

Were the recording stations in the same places 250 years ago? LOL! What about the concrete buildings and parking lots? What about them?

To: Bonefish who wrote (1023898)	7/6/2017 9:19:24 PM
From: Wharf Rat	Respond to of 1576760

They've gone from mercury thermometers read any time of day to electronic devices in uniform boxes recording at the same time everywhere. Changes in thermometer screensDuring the 20th century the Stevenson screen was established as the dominant thermometer screen. This screen protected the thermometer much better against radiation (solar and heat) than earlier designs. Deficits of earlier measurement methods have artificially warmed the temperatures in the 19th century. Some claim that earlier Stevenson screens were painted with inferior paints. The sun consequently heats up the screen more, which again heats the incoming air. The introduction of modern durable white paints may thus have produced a cooling bias. Currently we are in a transition to Automatic Weather Stations. This can show large changes in either direction for the network they are introduced in. What the net global effect is, is not clear at this moment. variable-variability.blogspot.com = A short introduction to the time of observation bias and its correction Message 30204632