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Urban Heat Island Effect
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13 Articles

The Global Urban Heat Island Effect from Population Density

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Dr. Roy Spencer describes a new technique for for estimating the average amount of urban heat island (UHI) warming accompanying an increase in population density. The most rapid rate of warming with population increase is at the lowest population densities, while some warming continues with population increases even for densely populated cities. A population density of only 100 persons per sq. km exhibits average warming of about 1.1 deg. C compared to a nearby unpopulated temperature monitoring location.



Comparing Rural and Urban U.S. Temperature Data

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Climate scientists are supposed to correct the temperature record to eliminate the urban heat island effect. But they do just the opposite. They adjust rural stations to increase their warming trends. The urban warming "adjustment protocol appears to accent to a warming effect rather than eliminate it."



Urban Heat Island Effect

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Dr. Tim Ball explains how urban development affects global temperature measurements.



Correct the Corrections: The GISS Urban Adjustment

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NASA applies an urban correction of its GISS temperature index in the wrong direction in 45% of the adjustments. Instead of eliminating the urbanization effects, these wrong way corrections makes the urban warming trends steeper. This article discusses Steve McIntyre's audit of the GISS corrections.



Quantifying the Influence of the Urban Heat Island Effect - Background

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Major global temperature indexes are adjusted to correct for the effects of urban development. R. McKitrick and P. Michaels analyse the pattern of warming over the Earth's land surface compared to local economic conditions. They found a statistically significant correlation between the adjusted temperature data and economic development, meaning that the adjustments are not adequate to remove the urban heat island effects. They conclude, "If the contamination were removed, we estimated the average measured warming rate over land would decline by about half."




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