https://science.feedback.org/review/claim-of-no-us-warming-since-2005-is-directly-contradicted-by-the-data-it-is-based-on/
USCRN is a state-of-the-art monitoring network that covers the contiguous US, with pristine-sited triple redundant thermometers sending data automatically via satellite uplinks in real time. It’s an incredibly valuable resource for us to ground-truth temperatures and provides a useful check on the effectiveness of our adjustments to the much-messier weather station network—which is subject to biases from station moves, instrument changes, time of observation changes, and changes in surrounding vegetation or urban form.
Since its inception, researchers have compared data from USCRN to the broader weather station network that constitutes our US historical temperature record. We have found that USCRN readings are nearly identical to the US-wide record from the weather station network; if anything, USCRN shows slightly more warming than the existing network (ClimDiv is the old network, USCRN is the new network):
Since it achieved nationwide coverage at the start of 2005, the warming rate (trend) in USCRN annual temperatures is 0.86°F per decade, with uncertainties ranging from -0.58°F to 2.31°F per decade. By contrast, the historical NOAA ClimDiv dataset only shows 0.64°F (ranging from -0.80°F to 2.07°F) per decade. As this is a relatively short time period and only covers around 2% of the surface of the Earth, we shouldn’t read too much into these numbers as an indication of longer-term changes, but we can say that USCRN data is completely consistent with the long-term warming trend, and suggestions that the USCRN “finds there has been no warming for the past 14 years at least” are categorically false.
https://science.feedback.org/review/claim-of-no-us-warming-since-2005-is-directly-contradicted-by-the-data-it-is-based-on/
