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1 Introduction
Pages 7-8

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From page 7...
... in the atmosphere regionally offset and mask the greenhouse effect, and stratospheric ozone depletion contributes to cooling of the upper troposphere and stratosphere.2 3 Many in the scientific community believe that a distinctive greenhouse-warming signature is evident in surface temperature data for the past few decades. Some, however, are puzzled by the fact that satellite temperature measurements indicate little, if any, warming of the lower to mid-troposphere (the layer extending from the surface up to about ~ krn)
From page 8...
... It also offers an informed opinion as to how the different temperature records should be interpreted, and recommends actions designed to reduce the remaining uncertainties in these measurements. 4 Unless specified otherwise, the "surface record" referred to in this report is a combination of the temperature of sea surface water and the temperature of surface air over land.


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