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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Translation, decay and splitting of Agulhas rings in the southeastern Atlantic Ocean
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Translation, decay and splitting of Agulhas rings in the southeastern Atlantic Ocean

机译：Agulhas环在东南大西洋的平移，衰减和分裂

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摘要

All Agulhas rings that were spawned at the Agulhas retroflection between 1993 and 1996 (a total of 21 rings) have been monitored using TOPEX/Poseidon satellite altimetry and followed as they moved through the southeastern Atlantic Ocean, decayed, interacted with bottom topography and each other: or dissipated completely. Rings preferentially crossed the Walvis Ridge at its deepest parts. After having crossed this ridge they have lower translational speeds, and their decay rate decreases markedly. Half the decay of long-lived rings takes place in the first 5 months of their lifetimes. In addition to the strong decay of rings in the Cape Basin, about one third of the observed rings do not seem to leave this region at arl but totally disintegrate here. The interaction of rings with bottom topography, in particular with the Vema Seamount: is shown frequently to cause splitting of rings. This will enhance mixing of the rings' Indian Ocean water into that of the southern Atlantic. This localized mixing may; well provide a considerable source of warm and salty Indian Ocean water into the Atlantic overturning circulation. [References: 37]
机译：使用TOPEX / Poseidon卫星测高仪对1993年至1996年在Agulhas逆行期间产卵的所有Agulhas环（总共21个环）进行了监视，随后它们穿过东南大西洋，衰变，与底部地形相互影响：或完全消散。戒指优先穿过沃尔维斯山脊的最深处。越过这个山脊后，它们的平移速度会降低，并且其衰减率会明显降低。长寿命环的衰变一半发生在其寿命的前5个月。除了开普盆地中环的强烈衰减外，大约三分之一的环似乎没有离开该区域，而是在这里完全崩塌。经常显示环与底部地形的相互作用，尤其是与Vema Seamount：的相互作用会导致环分裂。这将增强环的印度洋水与南部大西洋的水的混合。这种局部混合可能;很好地为大西洋提供了可观的温暖咸咸的印度洋水源，从而推翻了环流。 [参考：37]

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