Wind-driven advection across temperature gradients enhances iron-induced phytoplankton blooms in the Antarctic Polar Front

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
F.P. Brandini , A.M. Silver , A. Gangopadhyay
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引用次数: 0

Abstract

We demonstrate how the wind-driven Ekman transport enhances the advection and mixing of cells from the colder waters of the Surface Antarctic Waters from the south to the warmer waters of the northern Polar Front (PF) belt. This mechanism provides cells a mean ambient temperature near optimum levels for specific species and, ultimately, for community growth rates high enough to develop blooms under non-light limiting macronutrients and iron conditions. A Lagrangian trajectory model was constructed for tracking plankton cells as tracers forced by winds and surface currents. Depending on the region along the circumpolar front, increased winds can enhance this process across temperature gradients, and further accelerate such temperature-controlled growth. These results indicate that favorable temperature may enhance the growth rate even further when iron is sufficiently available, and thus have far-reaching implications for increased productivity in a future warming climate.

风驱动的跨温度梯度平流增强了南极极锋铁诱导的浮游植物水华
我们展示了风力驱动的埃克曼输送如何增强从南极表层水域较冷水域到北极锋(PF)带较暖水域的细胞平流和混合。这种机制为细胞提供了接近特定物种最佳水平的平均环境温度,并最终使群落生长率高到足以在非光限制的大量营养素和铁条件下开花。建立了拉格朗日轨迹模型,用于追踪风和地表流迫使的浮游生物细胞。根据环极锋沿线的区域,风的增加可以增强整个温度梯度的过程,并进一步加速这种温度控制的增长。这些结果表明,当铁足够可用时,有利的温度可能会进一步提高生长速度,因此在未来气候变暖的情况下,对提高生产力具有深远的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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