• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >High regional climate sensitivity over continental China constrained by glacial-recent changes in temperature and the hydrological cycle
【2h】

High regional climate sensitivity over continental China constrained by glacial-recent changes in temperature and the hydrological cycle

机译：受温度和水文循环的冰川变化影响中国大陆对区域气候的敏感性较高

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The East Asian monsoon is one of Earth’s most significant climatic phenomena, and numerous paleoclimate archives have revealed that it exhibits variations on orbital and suborbital time scales. Quantitative constraints on the climate changes associated with these past variations are limited, yet are needed to constrain sensitivity of the region to changes in greenhouse gas levels. Here, we show central China is a region that experienced a much larger temperature change since the Last Glacial Maximum than typically simulated by climate models. We applied clumped isotope thermometry to carbonates from the central Chinese Loess Plateau to reconstruct temperature and water isotope shifts from the Last Glacial Maximum to present. We find a summertime temperature change of 6–7 °C that is reproduced by climate model simulations presented here. Proxy data reveal evidence for a shift to lighter isotopic composition of meteoric waters in glacial times, which is also captured by our model. Analysis of model outputs suggests that glacial cooling over continental China is significantly amplified by the influence of stationary waves, which, in turn, are enhanced by continental ice sheets. These results not only support high regional climate sensitivity in Central China but highlight the fundamental role of planetary-scale atmospheric dynamics in the sensitivity of regional climates to continental glaciation, changing greenhouse gas levels, and insolation.
机译：东亚季风是地球上最重要的气候现象之一，许多古气候档案显示，东亚季风在轨道和亚轨道时间尺度上都有变化。与这些过去的变化相关的气候变化在数量上的限制是有限的，但仍需要限制该地区对温室气体水平变化的敏感性。在这里，我们显示，自上一次冰河世纪以来，中国中部是一个经历了比气候模型通常模拟的温度变化大得多的地区。我们对中国黄土高原中部的碳酸盐岩应用了聚集同位素测温法，以重建从最后一次冰期最大值到现在的温度和水同位素位移。我们发现夏季温度变化为6–7°C，此变化通过此处介绍的气候模型模拟得到了再现。代理数据揭示了冰川时期流星水向更轻的同位素组成转变的证据，这也被我们的模型捕获。对模型输出的分析表明，中国大陆的冰川降温在固定波的影响下得到了显着放大，而大陆波的冰盖反过来又增强了这种作用。这些结果不仅支持中部地区对区域气候的高度敏感性，而且突显了行星尺度大气动力学在区域气候对大陆冰川，变化的温室气体水平和日照的敏感性中的基本作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号