The Great Barrier Reef (GBR) is an internationally recognized and widely studied ecosystem, yet little is known about its sea surface temperature (SST) evolution since the Last Glacial Maximum (LGM) (~20 kyr BP). Here, we present the first paleo‐application of Isopora coral‐derived SST calibrations to a suite of 25 previously published fossil Isopora from the central GBR spanning ~25–11 kyr BP. The resultant multicoral Sr/Ca‐ and δ¹⁸O‐derived SST anomaly (SSTA) histories are placed within the context of published relative sea level, reef sequence, and coralgal reef assemblage evolution. Our new calculations indicate SSTs were cooler on average by ~5–5.5°C at Noggin Pass (~17°S) and ~7–8°C at Hydrographer's Passage (~20°S) (Sr/Ca‐derived) during the LGM, in line with previous estimates (Felis et al., 2014, https://doi.org/10.1038/ncomms5102). We focus on contextualizing the Younger Dryas Chronozone (YDC, ~12.9–11.7 kyr BP), whose Southern Hemisphere expression, in particular in Australia, is elusive and poorly constrained. Our record does not indicate cooling during the YDC with near‐modern temperatures reached during this interval on the GBR, supporting an asymmetric hemispheric presentation of this climate event. Building on a previous study (Felis et al., 2014, https://doi.org10.1038/ncomms5102), these fossil Isopora SSTA data from the GBR provide new insights into the deglacial reef response, with near‐modern warming during the YDC, since the LGM.

中文翻译：

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大堡礁上较年轻的树妖属Chronozone温暖的珊瑚记录

大堡礁（GBR）是国际公认的且经过广泛研究的生态系统，但自上次冰川期（LGM）（〜20 yr BP）以来，人们对其海表温度（SST）演变知之甚少。在这里，我们介绍了Isopora珊瑚衍生的SST校准的首次古生物学应用，它来自25个至11 kyr BP的中部GBR，由25个先前发布的化石Isopora组成。将所得multicoral SR / Ca-和δ ¹⁸源自O的SST异常（SSTA）历史记录在已发布的相对海平面，礁石序列和珊瑚礁组合演化的背景下。我们的新计算结果表明，在Noggin Pass（〜17°S）时，SST的平均温度低约〜5–5.5°C，而在水文专家通道（〜20°S）（Sr / Ca衍生）时，SST的平均温度低约〜7–8°C。 LGM，与先前的估计一致（Felis等，2014，https：//doi.org/10.1038/ncomms5102）。我们着重于对年轻的树蛙时空区（YDC，〜12.9-11.7 yr BP）进行情境化，该地区的南半球表达，尤其是在澳大利亚，难以捉摸且受到限制。我们的记录没有表明在YDC期间降温，而在GBR的这段时间内达到了近现代温度，这支持了这种气候事件的不对称半球表现。基于先前的研究（Felis et al。，2014，https：自LGM以来，YDC期间的近现代变暖，GBR的Isopora SSTA数据提供了对冰川礁反应的新见解。