...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Climate dynamics >Sensitivity of transient climate change to tidal mixing: Southern Ocean heat uptake in climate change experiments performed with ECHAM5/MPIOM
【24h】

Sensitivity of transient climate change to tidal mixing: Southern Ocean heat uptake in climate change experiments performed with ECHAM5/MPIOM

机译：瞬态气候变化对潮汐混合的敏感性：ECHAM5 / MPIOM在气候变化实验中对南大洋热量的吸收

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We investigate the sensitivity of the transient climate change to a tidal mixing scheme. The scheme parameterizes diapycnal diffusivity depending on the location of energy dissipation over rough topography, whereas the standard configuration uses horizontally constant diffusivity. We perform ensemble climate change experiments with two setups of MPIOM/ECHAM5, one setup with the tidal mixing scheme and the second setup with the standard configuration. Analysis of the responses of the transient climate change to CO_2 increase reveals that the implementation of tidal mixing leads to a significant reduction of the transient surface warming by 9 %. The weaker surface warming in the tidal run is localized particularly over the Weddell Sea, likely caused by a stronger ocean heat uptake in the Southern Ocean. The analysis of the ocean heat budget reveals that the ocean heat uptake in both experiments is caused by changes in convection and advection. In the upper ocean, heat uptake is caused by reduced convection and enhancement of the Deacon Cell, which appears also in isopycnal coordinates. In the deeper ocean, heat uptake is caused by reduction of convective cooling associated with the circulation polewards of 65 °S. Tidal mixing leads to stronger heat uptake in the Southern Ocean by causing stronger changes in advection, namely a stronger increase in the Deacon Cell and a stronger reduction in advective cooling by the circulation polewards of 65°S. Counter-intuitively, the relation between tidal mixing and greater heat storage in the deep ocean is an indirect one, through the influence of tidal mixing on the circulation.
机译：我们调查了瞬态气候变化对潮汐混合方案的敏感性。该方案根据在粗糙地形上能量散布的位置来参数化渗流扩散系数，而标准配置使用水平恒定扩散系数。我们使用MPIOM / ECHAM5的两种设置进行整体气候变化实验，一种采用潮汐混合方案，第二种采用标准配置。对瞬态气候变化对CO_2升高的响应的分析表明，潮汐混合的实施导致瞬态表面变暖显着降低了9％。潮汐过程中较弱的表面变暖特别是在韦德尔海地区发生，这可能是由于南大洋吸收热量增加所致。对海洋热量收支的分析表明，两个实验中海洋热量的吸收是由对流和对流变化引起的。在上层海洋中，热量吸收是由对流室的对流减少和增强引起的，该对流也出现在等渗坐标中。在更深的海洋中，由于与65°S的循环极点有关的对流冷却减少而引起热量吸收。潮汐混合通过使对流发生更强的变化，从而导致南大洋吸收更强的热量，即，执事室的更强增加和通过65°S的极向流动导致的对流冷却的更强减少。与直觉相反，通过潮汐混合对环流的影响，潮汐混合与深海中更大的热量存储之间的关系是间接的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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