Fig. 4: Reconstructions of surface mass balance (SMB) for an Antarctic ice core from ABN. | Nature Communications

Fig. 4: Reconstructions of surface mass balance (SMB) for an Antarctic ice core from ABN.

From: Sunlight-driven nitrate loss records Antarctic surface mass balance

Fig. 4: Reconstructions of surface mass balance (SMB) for an Antarctic ice core from ABN.The alternative text for this image may have been generated using AI.

a SMB for Aurora Basin North based on δ15NNO3arc data from the ABN1314-103 ice core. Reconstructed SMBδ15N values are shown by the red stepped lines with the 50-yr running mean±1σ overlaid as a darker thick line and shaded zone. b Comparison of SMB values reconstructed from δ15NNO3arc (red) with those from ice density (gray) and upstream GPR isochron depth48. The SMBδ15N and SMBGPR values were aggregated to match the 1-m resolution of the SMBdensity data. For SMBδ15N and SMBdensity, smoothed LOESS curves are overlaid to more clearly show long-term patterns. c SMBδ15N values after the upstream topographic impact on SMB has been removed, with 50-yr running mean±1σ values overlaid. The resulting residuals may better illustrate SMB variability due to climate change.

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