NOAA/WDS Paleoclimatology - Antarctic Peninsula Gomez Ice Core 150 Year d18O Data

We present a new 150-year, high-resolution, stable isotope record (d18O) from the Gomez ice core, drilled on the data sparse south western Antarctic Peninsula, revealing a ~2.7°C rise in surface temperatures since the 1950s. The record is highly correlated with satellite-derived temperature reconstructions and instrumental records from Faraday station on the north west coast, thus making it a robust proxy for local and regional temperatures since the 1850s. We conclude that the exceptional 50-year warming, previously only observed in the northern Peninsula, is not just a local phenomena but part of a statistically significant 100-year regional warming trend that began around 1900. A suite of coupled climate models are employed to demonstrate that the 50 and 100 year temperature trends are outside of the expected range of variability from pre-industrial control runs, indicating that the warming is likely the result of external climate forcing.

本研究基于在数据稀缺的西南南极半岛钻取的戈麦斯冰芯，构建了一条时长150年、高分辨率的稳定同位素（d18O）记录，该记录揭示了自20世纪50年代以来地表温度约升高2.7℃。该记录与卫星反演的温度重建数据以及西北岸法拉第站的仪器观测记录高度相关，因此可作为1850年代以来局地与区域温度的可靠代用指标。本研究得出结论：此前仅在南极半岛北部观测到的异常50年升温，并非局地现象，而是始于约1900年、具有统计学显著性的百年区域升温趋势的组成部分。本研究采用一组耦合气候模式，证明50年与100年温度趋势超出了工业前对照试验的预期变率范围，表明此次升温极可能由外部气候强迫所致。