A Review of the U.S. Historical Climatology Network Version 2: Adjusted Temperature Record for Penn.

By | April 6, 2010

us historical climatology

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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. Over the twelve year period 1998-2009 a drop in temperature was observed in both data sets with a raw trend of -0.75 ± 0.1 ºC/decade and an adjusted trend of -0.65 ± 0.1 ºC/decade.