Steady threefold Arctic Amplification of externally forced warming masked by natural variability

<p>SourceData.xlsx:</p> <p>Time series of the observed Arctic and global mean temperature, the MME Arctic and global mean temperature, the IPO index, the AM index, and the influences of tropical Pacific variability on the Arctic and global mean temperature.</p> <p>&nbsp;</p> <p>Arctic_Amplificaiton_Historicaltrend.py:</p> <p>Script for analyzing datasets and plotting figures</p> <p>&nbsp;</p>