VERTICAL MIXING AND CORAL DEATH IN THE RED-SEA FOLLOWING THE ERUPTION OF MOUNT-PINATUBO
VERTICAL MIXING AND CORAL DEATH IN THE RED-SEA FOLLOWING THE ERUPTION OF MOUNT-PINATUBO
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DOI：
10.1038/377507a0
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发表时间：
1995-10-12
期刊：
影响因子：
64.8
通讯作者：
BRENNER, S
中科院分区：
文献类型：
--
作者：
GENIN, A;LAZAR, B;BRENNER, S
1992年冬季，菲律宾皮纳图博火山的喷发导致整个中东地区出现冷空气温度异常(1)。在此，我报告说，那个冬天埃拉特湾（亚喀巴）的垂直混合深度异常深（深度超过 850 米），导致地表水的营养供应增加，从而促进了异常大量的藻类和浮游植物的大量繁殖。到了春天，一层厚厚的丝状藻覆盖了底层珊瑚礁的大片区域，导致珊瑚大量死亡。分枝珊瑚群和孤立的蘑菇珊瑚受到的影响最为严重。埃拉特湾异常微弱的水柱分层使这一系列事件成为可能，其中短期大气降温导致了显着的生态反应。冬季局部垂直混合的深度取决于海气界面的净热损失，因此异常寒冷的冬季会推动更深层次的混合，从而导致浮游植物大量繁殖。化石礁中此类事件的记录可能会提供过去区域气温变化的有用指标。
THE eruption of Mount Pinatubo in the Philippines led to a cold air-temperature anomaly throughout the Middle East during the winter of 1992(1). Here me report that the vertical mixing in the Gulf of Eilat (Aqaba) that winter was unusually deep--extending to >850 m--resulting in increased supply of nutrients to surface waters, which fuelled extraordinarily large algal and phytoplankton blooms. By spring, a thick mat of filamentous algae covered broad sections of the underlying reef causing extensive coral death. Branching colonies and solitary mushroom corals were most severely affected. This sequence of events, in which a short-term atmospheric cooling leads to a remarkable ecological response, is made possible by the unusually weak water-column stratification of the Gulf of Eilat. The depth of local vertical mixing during winter is determined by the net heat loss across the sea-air interface, so that anomalously cold winters drive the deeper mixing that can lead to increased phytoplankton blooms. Records of such events in fossil reefs may provide useful indicators of past variations in regional air temperatures.