Physical-Ecological Response of the California Current System to ENSO events in ROMS-NEMURO

Physical-Ecological Response of the California Current System to ENSO events in ROMS-NEMURO
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加州洋流系统对 ROMS-NEMURO 中 ENSO 事件的物理生态响应

DOI:
10.1007/s10236-021-01490-9
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发表时间:
2022
期刊:
影响因子:
2.3
通讯作者:
Dussin, Raphael
Dussin, Raphael
中科院分区:
地球科学3区
文献类型:
--
作者:
Cordero-Quirós, Nathalí;Miller, Arthur J.;Pan, Yunchun;Balitaan, Lawrence;Curchitser, Enrique;Dussin, Raphael

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我们分析了自下而上的厄尔尼诺/南方涛动(ENSO)驱动的物理-生物响应的加州当前系统(CCS)在高分辨率,“涡旋尺度”的海洋模型与多个类的浮游植物和浮游动物被迫与观测到的风在1959年至2007年期间。海表温度异常对CCS的响应是不对称的,拉尼娜事件比厄尔尼诺事件更持续寒冷,这与以前的研究一致。地球化学和生态响应由ENSO复合异常、与ENSO指数的滞后相关和ENSO年的直方图表示。结果表明,在厄尔尼诺和拉尼娜事件,其中较大的组件(硅藻,磷虾,桡足类)在厄尔尼诺期间沿海上升流区被抑制,而较小的组件(鞭毛虫和纤毛虫)增强营养级的相互作用。此外,CCS的立涡调节生态响应ENSO的纬向结构。这些结果指向未来的研究,以了解自下而上的变化如何导致生态反应模式的变化,包括鱼类种群和顶级捕食者。
We analyze the bottom-up El Niño/Southern Oscillation (ENSO) driven physical-biological response of the California Current System (CCS) in a high-resolution, “eddy-scale” ocean model with multiple classes of phytoplankton and zooplankton forced with observed winds over the time period 1959–2007. The response of the sea surface temperature anomalies over the CCS is asymmetrical, with La Niña events being more consistently cold than El Niño events are consistently warm, which is in agreement with previous studies. The biogeochemical and ecological response is represented by ENSO composite anomalies, lag correlations with an ENSO index, and histograms for ENSO years. The results show trophic level interactions during El Niño and La Niña events in which the larger components (diatoms, euphausiids, and copepods) are suppressed in the coastal upwelling zones during El Niño, while the smaller components (flagellates and ciliates) are enhanced. In addition, standing eddies of the CCS modulate the latitudinal structure of the ecological response to ENSO. The results point towards future research to understand how bottom-up changes may lead to variability of patterns in ecological response, including fish populations and top predators.
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