Fig. 4: Western Arctic SIC responses to interannual PNA variability.
From: Acceleration of western Arctic sea ice loss linked to the Pacific North American pattern
a Regression patterns of the detrended ERA-interim Z500 (contour, m per decade, 25 m interval) and lower-tropospheric (1000–850 hPa) temperature (shading, °C per decade) onto the observed PNA index. b, c Same as a but for the LMDZ forced-nudged b and slab-nudged simulations (c). Shading with stippling indicates statistical significance at the 5% level in a–c. d Detrended time series of the observed and simulated PNA indices. e, f Same as d but for lower-tropospheric temperature and SIC.
