Long Term Temperature Trends in Daily Station Data: USHCN
26 Pages Posted: 26 May 2017
Date Written: May 26, 2017
Month by month trend analysis of more than 100 years of daily maximum (TMAX) and daily minimum (TMIN) temperatures from 34 USHCN stations in 17 states across the USA is presented. The results show an overall warming trend in the data that is driven primarily by warming in the nighttime measurement TMIN. The evidence of warming in the TMIN data is seen more clearly in a gradual narrowing of the diurnal range. These results are inconsistent with the usual assumption that warming trends in the USHCN instrumental record are driven by anthropogenic global warming.
Keywords: climate change, station temperature data, trend analysis, trend profile, AGW, anthropogenic global warming, fossil fuel emissions, USHCN, temperature trend asymmetry, diurnal cycle, trend in diurnal cycle, cloud feedback
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