Interannual monsoon wind variability as a key driver of East African small pelagic fisheries
Interannual monsoon wind variability as a key driver of East African small pelagic fisheries
复制标题
年际季风风变率是东非小型中上层渔业的关键驱动因素
DOI：
10.1038/s41598-020-70275-9
复制
发表时间：
2020
影响因子：
4.6
通讯作者：
E. Popova
中科院分区：
文献类型：
--
作者：
Fatma Jebri;Z. Jacobs;D. Raitsos;M. Srokosz;Stuart C. Painter;S. Kelly;M. Roberts;L. Scott;Sarah F. W. Taylor;M. Palmer;Hellen Kizenga;Y. Shaghude;J. Wihsgott;E. Popova
小型远洋渔业为东非沿海社区--最不发达国家的一个区域--提供粮食安全、生计支持和经济稳定。利用遥感和实地观测以及建模，我们解决了这一重要资源的生物物理驱动因素。我们表明，渔业产量的年度变化与叶绿素-a(浮游植物生物量的指数)的变化是平行的。东北季风期间浮游植物生物量的增加是由风驱动的上升流引发的，而在东南季风期间，浮游植物生物量的增加是由两种洋流机制驱动的：海岸“动力抬升”上升流和营养盐向西平流。这种对东南季风的生物响应大于对东北季风的生物响应。在没有受到强烈厄尔尼诺/拉尼娜事件影响的年份里，南热带印度洋上的东南季风强度是年际变化的主要驱动因素。这对渔业产量的可预测性、对气候变化的反应、政策和资源管理具有重要影响。
Small pelagic fisheries provide food security, livelihood support and economic stability for East African coastal communities—a region of least developed countries. Using remotely- sensed and field observations together with modelling, we address the biophysical drivers of this important resource. We show that annual variations of fisheries yield parallel those of chlorophyll-a (an index of phytoplankton biomass). While enhanced phytoplankton biomass during the Northeast monsoon is triggered by wind-driven upwelling, during the Southeast monsoon, it is driven by two current induced mechanisms: coastal “dynamic uplift” upwelling; and westward advection of nutrients. This biological response to the Southeast monsoon is greater than that to the Northeast monsoon. For years unaffected by strong El-Niño/La-Niña events, the Southeast monsoon wind strength over the south tropical Indian Ocean is the main driver of year-to-year variability. This has important implications for the predictability of fisheries yield, its response to climate change, policy and resource management.
影响因子：
4.1
作者：
Pitcher, G. C.;Figueiras, F. G.;Hickey, B. M.;Moita, M. T.
通讯作者：
Moita, M. T.