Meridional heat transport across the Antarctic Circumpolar Current by the Antarctic Bottom Water overturning cell
Meridional heat transport across the Antarctic Circumpolar Current by the Antarctic Bottom Water overturning cell
复制标题
南极底水翻转细胞穿过南极绕极流的经向热传输
DOI：
--
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
D. Stevens
中科院分区：
文献类型：
--
作者：
K. Heywood;D. Stevens
由南大洋经向翻转环流的下端输送的热量通常被认为与由较高水柱的涡流输送的热量相比可以忽略不计。我们使用最早的全球高分辨率模式之一的输出来对南极底水进行合理的实际输出，即OCCAM 1 / 12度模式。利用1994年56秒的年平均场，深层翻转单元向南输送的热通量为0.033 PW，但5天平均场提供的热通量更大（根据计算方法不同，分别为0.048和0.061 PW）。这比以前估计的总热通量的30%还多。涡流和其他瞬变现象大大增加了热流。这些结果表明，经向热通量的这一分量可能不像以前设想的那样可以忽略不计。
The heat transported by the lower limb of the Southern Ocean meridional overturning circulation is commonly held to be negligible in comparison with that transported by eddies higher in the water column. We use output from one of the first global high resolution models to have a reasonably realistic export of Antarctic Bottom Water, the OCCAM one twelfth degree model. The heat fluxed southward by the deep overturning cell using the annual mean field for 1994 at 56S is 0.033 PW, but the 5‐day mean fields give a larger heat flux (0.048 and 0.061 PW depending on calculation method). This is more than 30% of previous estimates of the total heat flux. Eddies and other transients add considerably to the heat flux. These results imply that this component of meridional heat flux may not be negligible as has been supposed.