Dandonneau Yves, Vega Andres, Loisel Hubert, du Penhoat Yves, Menkes Christophe
IRD, IPSL/Laboratoire d'Océanographie Dynamique et de Climatologie, 75252 Paris 05, France.
Science. 2003 Nov 28;302(5650):1548-51. doi: 10.1126/science.1090729.
Recent satellite observations of Rossby waves and chlorophyll anomalies propagating in subtropical gyres have suggested that wave-induced upwelling could stimulate photosynthesis. Instead, we show that chlorophyll maxima are located in abnormally warm water, in Rossby wave-induced convergences. This excludes inputs of nutrients from deeper water. We argue that the sea color anomalies are not caused by chlorophyll but by floating particles evolved from the ecosystem and accumulated by Rossby waves, acting as "marine hay rakes," in convergence zones. Such processes may be determinant for the distribution of living organisms in oligotrophic areas.
近期对亚热带环流中传播的罗斯比波和叶绿素异常现象的卫星观测表明，波致上升流可能会刺激光合作用。然而，我们发现叶绿素最大值位于罗斯比波引起的辐合区的异常温暖水域中。这排除了深层水营养物质的输入。我们认为，海色异常并非由叶绿素引起，而是由生态系统产生并在辐合区被罗斯比波像“海洋干草耙”一样聚集起来的漂浮颗粒导致的。此类过程可能对贫营养区域生物的分布起决定性作用。
