Here we show, by using several observational datasets which cover the Arctic region, that during the last 43 years the Arctic has been warming nearly four times faster than the globe, which is a higher ratio than generally reported in literature.
This sentence states the paper's headline quantitative claim — the Arctic-to-global OLS warming trend ratio for 1979–2021 — and asserts it exceeds prior literature estimates. The ratio is directly computable from public observational datasets, making it an ideal target for computational replication. We test it using the same four datasets (ERA5, GISTEMP v4, Berkeley Earth, HadCRUT5), extending the window to 1979–2024/2025 to assess whether the claim holds as newer observations accumulate.
Paper annotation: Here we show, by using several observational datasets which cover the Arctic region, that during the last 43 years the Arctic has been warming nearly four times faster than the globe, which is a higher ratio than generally reported in literature.