The reasons for the Holocene temperature conundrum, known as the inconsistency between the reconstructed cooling and the inferred warming simulations during the Holocene, remain unclear. Temperature reconstructions from the Tibetan Plateau (TP) provide important insights for understanding the Holocene temperature conundrum due to enhanced sensitivity to climate at high altitudes. Given the significant positive correlation between air temperature and δ¹⁸O in precipitation over the northern TP, the stable isotopic records of ice cores recovered from this area are widely used for paleotemperature reconstruction. Here we present a new high‐resolution δ¹⁸O record from the Chongce ice cores to bedrock, dated back to 7 ka BP by the AMS ¹⁴C dating technique. Our reconstructed temperature record shows a long‐term warming trend until ~2 ka BP, followed by an abrupt change to a relatively cool period until the start of the industrial‐era warming. This record challenges the widely recognized Holocene reconstruction from the neighboring Guliya ice core. It is also different from many previous temperature reconstructions, most of which have summer biases and show a long‐term cooling trend over the past two millennia. In addition, our record shows that temperatures during the recent decades are almost the highest during the past 7 ka BP, highlighting the unusual warming forced by anthropogenic greenhouse gases.

中文翻译：

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过去7,000年里受冰芯水同位素限制的西北高原温度趋势

尚不清楚全新世温度难题的原因，即在全新世期间重建的冷却与推断的升温模拟之间不一致的原因。由于高原地区对气候的敏感性增强，青藏高原（TP）的温度重建为了解全新世温度难题提供了重要见解。定的空气温度和δ之间的显著正相关¹⁸ ○在降水北部TP，冰核的稳定同位素记录从该区域被广泛地用于重建古温度回收。在这里，我们提出了一种新的高分辨率δ ¹⁸由AMS从Chongce冰芯基岩，追溯到Ø记录到7万年BP ¹⁴C约会技术。我们重建的温度记录显示直到〜2 ka BP为止的长期升温趋势，随后突然转变为相对凉爽的时期，直到工业时代开始升温。该记录对邻近的古利亚冰芯进行的全新世重建提出了挑战。它也不同于以前的许多温度重建，大多数温度重建都存在夏季偏差，并且在过去两千年中显示出长期的降温趋势。此外，我们的记录显示，近几十年来的温度几乎是过去7 ka BP以来的最高温度，突显了人为温室气体造成的异常变暖。