Intensification of the meridional temperature gradient in the Great Barrier Reef following the Last Glacial Maximum.
Intensification of the meridional temperature gradient in the Great Barrier Reef following the Last Glacial Maximum.
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DOI：
10.1038/ncomms5102
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发表时间：
2014-06-17
影响因子：
16.6
通讯作者：
Webster JM
中科院分区：
文献类型：
--
作者：
Felis T;McGregor HV;Linsley BK;Tudhope AW;Gagan MK;Suzuki A;Inoue M;Thomas AL;Esat TM;Thompson WG;Tiwari M;Potts DC;Mudelsee M;Yokoyama Y;Webster JM
热带西南太平洋的温度对大堡礁（GBR）至关重要，但自末次冰盛期以来，海表温度（SST）在大堡礁增长中的作用在很大程度上仍然未知。在这里，我们目前的Sr/Ca和δ 18 O记录末次冰期最大和冰消期珊瑚，显示了一个相当陡峭的纬向SST梯度比今天在中央GBR。我们发现大约20，000到13，000年前，17°和20°S之间的温度下降了1-2 °C。这一结果最好的解释是，由于南太平洋环流和东澳大利亚洋流的减弱，较冷的亚热带沃茨向北扩张。我们的研究结果表明，在最后一次冰消期，GBR经历了重大的纬向温度变化，并有助于解释异常的冰消期干燥的澳大利亚东北部。总体而言，GBR是通过显著的SST变化发展起来的，可能比以前认为的更具弹性。 大堡礁（GBR）正受到海洋温度上升的威胁，但它对过去温度变化的反应却知之甚少。Felis等人的研究表明，在最后一次冰川消退期间，GBR经历了更陡峭的温度梯度，这表明它可能比以前认为的更具弹性。
Tropical south-western Pacific temperatures are of vital importance to the Great Barrier Reef (GBR), but the role of sea surface temperatures (SSTs) in the growth of the GBR since the Last Glacial Maximum remains largely unknown. Here we present records of Sr/Ca and δ18O for Last Glacial Maximum and deglacial corals that show a considerably steeper meridional SST gradient than the present day in the central GBR. We find a 1–2 °C larger temperature decrease between 17° and 20°S about 20,000 to 13,000 years ago. The result is best explained by the northward expansion of cooler subtropical waters due to a weakening of the South Pacific gyre and East Australian Current. Our findings indicate that the GBR experienced substantial meridional temperature change during the last deglaciation, and serve to explain anomalous deglacial drying of northeastern Australia. Overall, the GBR developed through significant SST change and may be more resilient than previously thought. The Great Barrier Reef (GBR) is under threat from rising ocean temperatures, yet its response to past temperature change is poorly known. Felis et al. show that the GBR experienced a much steeper temperature gradient during the last deglaciation, suggesting it may be more resilient than previously thought.
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影响因子：
3.5
作者：
Gladfelter, E.H.
通讯作者：
Gladfelter, E.H.
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通讯作者：
Done, T.J.