Eddies and Upper‐Ocean Nutrient Supply
Eddies and Upper‐Ocean Nutrient Supply
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DOI：
10.1029/177gm09
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
A. Oschlies
中科院分区：
文献类型：
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作者：
A. Oschlies
回顾了中尺度涡流在生物地球化学循环中的作用，重点关注贫营养环流的营养供应。先前对涡流引起的养分供应的估计存在一个数量级的差异，这可能与对养分消耗的时间尺度和随后对养分耗尽的水域的补给做出的不同假设有关。完全预测涡旋解析生态系统循环模型的结果显示，涡旋引起的北大西洋副热带环流硝酸盐供应量通常小于 0.05 mol m-2year-1。该数字包括横向涡流搅拌的贡献，平均而言，横向涡流搅拌的贡献大于垂直涡流泵送的贡献。结果与先前的保守估计一致，并表明先前对涡流泵送养分供应的高估计被高估了。
The role of mesoscale eddies in biogeochemical cycles is reviewed with a focus on the nutrient supply to the oligotrophic gyres. Previous estimates of the eddyinduced nutrient supply differ by an order of magnitude, which can be related to different assumptions made about timescales for nutrient consumption and subsequent recharging of nutrient-depleted waters. Results from a fully prognostic eddy-resolving ecosystem-circulation model reveal a magnitude of eddy-induced nitrate supply to the North Atlantic subtropical gyre of typically less than 0.05 mol m-2 year-1. This number includes the contribution by lateral eddy stirring which, on average, is larger than that by vertical eddy pumping. The results are in line with earlier conservative estimates and suggest that previous high estimates of the nutrient supply by eddy pumping have been overestimates.