Research Studies¶

We use the USHCN Temperature Data Analysis Tool to support a growing number of research studies investigating the USHCN temperature datasets.

Urban Heat Island Contamination¶

In this study, we examine the effectivess of NOAA's homogenisation method for removing Urban Heat Island contamination. We discovered that NOAA adjustments enhance urban heat island signals by 9.4% rather than removing them, with 22.7% of USHCN stations experiencing urban heat island contamination averaging 0.725°C.

Technical Paper:
Urban Heat Island Contamination Persists in Homogenized USHCN Temperature Records: A 126-Year Analysis

Progressive Warming Bias¶

in this study, we investigate evidence of systematic artificial warming in the US temperature record. We discovered that NOAA's F52 adjustments introduce progressive warming bias beyond legitimate time-of-observation corrections, with maximum temperatures showing 0.035°C/decade artificial warming (~0.45°C since 1895) and identical bias patterns in urban and rural stations providing "smoking gun" evidence of systematic artifacts.

Technical Paper:
Progressive Warming Bias in NOAA's F52 Temperature Adjustments: Evidence from 128 Years of USHCN Data