A large abrupt change in the abyssal water masses of the eastern Mediterranean
A large abrupt change in the abyssal water masses of the eastern Mediterranean
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地中海东部深海水团发生巨大突变
DOI：
10.1029/2007gl031737
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发表时间：
2007
影响因子：
5.2
通讯作者：
D. Hainbucher
中科院分区：
文献类型：
--
作者：
A. Rubino;D. Hainbucher
在这封信中，我们报告的意见显示，第一次，发生了一个新的，重大的转变，在地中海东部的温盐细胞。20年来，起源于爱琴海的沃茨主导了该盆地的深海层，此后，亚得里亚海又重新成为东地中海深水的一个主要来源。然而，观察到的这些水的特征与以前在爱奥尼亚海盆深海层中观察到的特征有很大不同。事实上，我们观察到的新形成的EMDW比东地中海瞬变（EMT）之前和期间观察到的EMDW更咸，更温暖，更密集。因此，在过去的20年里，一度被认为是稳定的东地中海温盐圈出现了两次大的、突然的、以某种方式相反的波动。与第一次波动的情况一样，第二次波动的起源、气候影响和命运都必须澄清。
In this letter we report observations showing, for the first time, the occurrence of a new, major transformation in the thermohaline cell of the eastern Mediterranean Sea. After 2 decades, during which waters of Aegean origin dominated the abyssal layers of that basin, the Adriatic Sea has returned to represent a major source of Eastern Mediterranean Deep Water (EMDW). The observed characteristics of such water, however, profoundly differ from those observed previously in the abyssal layers of the Ionian basin. In fact, the newly formed EMDW we observed there is saltier, warmer, and denser than EMDW observed before and during the Eastern Mediterranean Transient (EMT). Thus, during the past 2 decades, the thermohaline cell of the eastern Mediterranean, once considered steady, showed two large, abrupt, somehow opposite fluctuations. As in the case of the first one, origins, climatic implications, and fate of this second fluctuation have to be clarified.