Potential Predictability of the Spring Bloom in the Southern Ocean Sea Ice Zone

Potential Predictability of the Spring Bloom in the Southern Ocean Sea Ice Zone
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南大洋海冰区春季水华的潜在可预测性

DOI:
10.1029/2023gl105139
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发表时间:
2023
影响因子:
5.2
通讯作者:
Buchovecky B
Buchovecky B
中科院分区:
地球科学1区
文献类型:
--
作者:
Buchovecky B

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每年南极洲的春天,当南极海冰融化时,有利的生长条件会导致浮游植物大量繁殖,这支撑了当地大部分海洋生态系统。最近的研究发现,南极海冰可以提前几年预测,这表明春季水华可能表现出类似的可预测性。利用一套完美的模式可预测性实验,我们发现,在许多南大洋地区,11月份的净初级生产量(NPP)可能是提前7-10年预测的。海冰范围的可预测性在冬末达到峰值,其次是吸收的短波辐射和NPP,滞后2至3个月。这种可预测性的季节性进展支持了我们的假设,即海冰和光照限制控制着春季水华的内在可预测性。我们的结果表明,对NPP进行巧妙的年际预测是可以实现的,这对管理渔业和海洋生态系统以及指导南大洋的养护政策具有重要意义。
Every austral spring when Antarctic sea ice melts, favorable growing conditions lead to an intense phytoplankton bloom, which supports much of the local marine ecosystem. Recent studies have found that Antarctic sea ice is predictable several years in advance, suggesting that the spring bloom might exhibit similar predictability. Using a suite of perfect model predictability experiments, we find that November net primary production (NPP) is potentially predictable 7 to 10 years in advance in many Southern Ocean regions. Sea ice extent predictability peaks in late winter, followed by absorbed shortwave radiation and NPP with a 2 to 3 months lag. This seasonal progression of predictability supports our hypothesis that sea ice and light limitation control the inherent predictability of the spring bloom. Our results suggest skillful interannual predictions of NPP may be achievable, with implications for managing fisheries and the marine ecosystem, and guiding conservation policy in the Southern Ocean.
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