Deep ocean heat content changes estimated from observation and reanalysis product and their influence on sea level change
Deep ocean heat content changes estimated from observation and reanalysis product and their influence on sea level change
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DOI：
10.1029/2010jc006464
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发表时间：
2011-03-05
影响因子：
3.6
通讯作者：
Awaji, Toshiyuki
中科院分区：
文献类型：
--
作者：
Kouketsu, Shinya;Doi, Toshimasa;Awaji, Toshiyuki
计算了20世纪90年代至21世纪初3000米以下沃茨的流域尺度和全球海洋年代际温度变化率。在南极洲周围探测到了大幅度的温度上升，在太平洋绕极深水向北的路径上也探测到了沿着相对较大的温度上升。根据3000米以下的温度变化率估计的全球热含量（HC）变化为0.8 × 10（22）J decade（-1）;这是一个不能忽略的数值，用于精确估计全球热平衡。我们再现了观测到的温度变化在深海中使用的数据同化系统和检查虚拟观测再现的数据字段，以评估的不确定性的HC变化估计从实际的时间和空间稀疏的观测。从虚拟观测的分析，它表明，全球HC增加3000米以下的近几十年来，可以检测到使用现有的观测系统的定期重访相同的采样剖面，虽然不确定性很大。
We calculated basin-scale and global ocean decadal temperature change rates from the 1990s to the 2000s for waters below 3000 m. Large temperature increases were detected around Antarctica, and a relatively large temperature increase was detected along the northward path of Circumpolar Deep Water in the Pacific. The global heat content (HC) change estimated from the temperature change rates below 3000 m was 0.8 x 10(22) J decade(-1); a value that cannot be neglected for precise estimation of the global heat balance. We reproduced the observed temperature changes in the deep ocean using a data assimilation system and examined virtual observations in the reproduced data field to evaluate the uncertainty of the HC changes estimated from the actual temporally and spatially sparse observations. From the analysis of the virtual observations, it is shown that the global HC increase below 3000 m during recent decades can be detected using the available observation system of periodic revisits to the same sampling sections, although the uncertainty is large.