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首页> 外文期刊>Journal of Physical Oceanography >Abyssal Ocean Warming and Salinification after Weddell Polynyas in the GFDL CM2G Coupled Climate Model
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Abyssal Ocean Warming and Salinification after Weddell Polynyas in the GFDL CM2G Coupled Climate Model

机译：GFDL CM2G耦合气候模型中Weddell Polynyas之后的深海海洋变暖和盐碱化

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摘要

The role of Weddell Sea polynyas in establishing deep-ocean properties is explored in the NOAA Geophysical Fluid Dynamics Laboratory's (GFDL) coupled climate model CM2G. Using statistical composite analysis of over 30 polynya events that occur in a 2000-yr-long preindustrial control run, the temperature, salinity, and water mass changes associated with the composite event are quantified. For the time period following the composite polynya cessation, termed the recovery, warming between 0.002 degrees and 0.019 degrees C decade(-1) occurs below 4200 m in the Southern Ocean basins. Temperature and salinity changes are strongest in the Southern Ocean and the South Atlantic near the polynya formation region. Comparison of the model results with abyssal temperature observations reveals that the 1970s Weddell Polynya recovery could account for 10% +/- 8% of the recent warming in the abyssal Southern Ocean. For individual Southern Ocean basins, this percentage is as little as 6% +/- 11% or as much as 34% +/- 13%.
机译：NOAA地球物理流体动力学实验室（GFDL）耦合气候模型CM2G探索了Weddell Sea polynyas在建立深海特性中的作用。使用对2000年工业化前的控制运行中发生的30多个polynya事件的统计综合分析，可以量化与该综合事件相关的温度，盐度和水质变化。在复合多年生植物停止之后的一段时期内，即所谓的恢复期，在南大洋盆地的4200 m以下发生了在0.002到0.019摄氏度之间的增温（-1）。温度和盐度变化在波利尼亚形成区域附近的南大洋和南大西洋最强烈。模型结果与深海温度观测结果的比较表明，1970年代Weddell Polynya的恢复可能占深海南部大洋近期变暖的10％+/- 8％。对于个别的南部海洋盆地，该百分比仅为6％+/- 11％或高达34％+/- 13％。

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