Relaxation of central Arctic Ocean hydrography to pre‐1990s climatology

Upper ocean hydrography in the central Arctic Ocean has relaxed since 2000 to near‐climatological conditions that pertained before the dramatic changes of the 1990s. The behavior of the anomalies of temperature and salinity in the central Arctic Ocean follow a first‐order linear response to the AO with time constant of 5 years and a delay of 3 years.