Thermohaline properties in the Eastern Mediterranean in the last three decades: is the basin returning to the pre-EMT situation?
Thermohaline properties in the Eastern Mediterranean in the last three decades: is the basin returning to the pre-EMT situation?
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DOI：
10.5194/os-11-53-2015
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发表时间：
2015-01-01
期刊：
影响因子：
3.2
通讯作者：
Rubino, A.
中科院分区：
文献类型：
--
作者：
Cardin, V.;Civitarese, G.;Rubino, A.
对2011年4月和6月（分别为M84/3和P414航次）收集的温度、盐度和氧气数据进行了分析，以得出东地中海海盆的海洋学特征。将这些观察到的特征与1987-2011年期间的前几次航行的特征进行了比较。其结果是，EM温盐属性的年际和年代际变化的背景下，东地中海瞬变（EMT）和盆地的大气环流的演变进行了讨论。我们发现，EM的状态仍然远离EMT前的条件，尽管2011年的结果可能表明缓慢恢复到这一状态。特别地，比较了由预处理年际变率和海气相互作用引起的温盐性质演变（热通量）在南亚得里亚海和印度洋揭示了两个密集的水源交替的方面（亚得里亚海和爱琴海）在过去的三十年里，这对爱奥尼亚和黎凡特盆地中层和深层的水文特征有很强的影响。
Temperature, salinity and oxygen data collected during April and June 2011 (M84/3 and P414 cruises respectively) are analysed to derive the oceanographic characteristics of the Eastern Mediterranean (EM) basin. These observed characteristics are compared with those from previous cruises over the period 1987-2011. As a result, the interannual and decadal variability of the EM thermohaline properties are discussed in the context of the evolution of the Eastern Mediterranean Transient (EMT) and of the general circulation of the basin. We found that the state of the EM is still far from the pre-EMT conditions, though the 2011 results possibly indicate a slow return to this status. In particular, a comparison between thermohaline property evolution deriving from interannual variability of the preconditioning and air-sea interaction (heat fluxes) in the South Adriatic and the Cretan Seas reveals aspects of the alternation of the two dense water sources (Adriatic and Aegean) during the last three decades, which have strong implications for the hydrographic characteristics of the intermediate and deep layers of the Ionian and Levantine basins.