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Interactions between marine biota and ENSO: a conceptual model analysis

机译：海洋生物群与ENSO之间的相互作用：概念模型分析

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We develop a conceptual coupled atmosphere-ocean-ecosystem model for the tropical Pacific to investigate the interaction between marine biota and the El Ni?o-Southern Oscillation (ENSO). Ocean and atmosphere are represented by a two-box model for the equatorial Pacific cold tongue and the warm pool, including a simplified mixed layer scheme. Marine biota are represented by a three-component (nutrient, phytoplankton, and zooplankton) ecosystem model. brbr The atmosphere-ocean model exhibits an oscillatory state which qualitatively captures the main physics of ENSO. During an ENSO cycle, the variation of nutrient upwelling, and, to a small extent, the variation of photosynthetically available radiation force an ecosystem oscillation. The simplified ecosystem in turn, due to the effect of phytoplankton on the absorption of shortwave radiation in the water column, leads to (1) a warming of the tropical Pacific, (2) a reduction of the ENSO amplitude, and (3) a prolongation of the ENSO period. We qualitatively investigate these bio-physical coupling mechanisms using continuation methods. It is demonstrated that bio-physical coupling may play a considerable role in modulating ENSO variability.
机译：我们为热带太平洋开发了一个概念性的大气-海洋-生态系统耦合模型，以研究海洋生物群与厄尔尼诺-南方涛动（ENSO）之间的相互作用。海洋和大气层由赤道太平洋冷舌和暖池的两箱模型表示，包括简化的混合层方案。海洋生物区系由三部分（营养，浮游植物和浮游动物）生态系统模型表示。 大气-海洋模型呈现出一种振荡状态，定性地捕获了ENSO的主要物理学。在ENSO周期中，养分上升的变化以及光合有效辐射的变化在很小程度上迫使生态系统振荡。反过来，由于浮游植物对水柱中短波辐射吸收的影响，简化的生态系统又导致（1）热带太平洋变暖，（2）ENSO振幅减小和（3）a ENSO期限的延长。我们使用连续方法定性地研究了这些生物物理耦合机制。结果表明，生物物理耦合可能在调节ENSO变异性中起重要作用。

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