Adjusting Pennsylvania

Abstract: This report compares the raw with the United States Historical Climatology Network Version 2 (USHCN V2) adjusted temperature records for the twenty-four USHCN listed temperature stations in the state of Pennsylvania. Averaging over the twenty-four stations the raw data yielded a small linear decline with temperatures trending -0.1 ± 0.1 ºC/century, while the U.S. Historical Climatology Network (USCHN) Version 2 adjusted data revealed an increase of 0.7 ± 0.1 ºC/century.  …

Conclusions: In the state of Pennsylvania the raw temperature record reveals no significant change in temperature over the period from 1895 to 2009. The USHCN V2 adjusted temperature record shows an increase of less than a degree Celsius over those years.  … In both the short and longer term cases the USHCN V2 adjusted data yielded trends that were roughly 1ºC per century higher than those found in the raw temperature records.”  “A REVIEW OF THE UNITED STATES HISTORICAL CLIMATOLOGY NETWORK VERSION 2: ADJUSTED TEMPERATURE RECORD FOR PENNSYLVANIA, U.S.A.

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