SGER: Fe limitation as a control on primary production in the Arabian Sea during the SW Monsoon

在西南季风期间和之后参加阿拉伯海游轮的邀请为南加州大学的科学家提供了一个独特的机会，来确定迄今为止提出的两个结论中的哪一个负责调节该地区的初级生产。具体地说，研究人员计划检验以下三个假设：(1)生长实验将表明，阿拉伯海西部的碳固定是有限的铁；(2)碳固定受到铁和铜的限制，这反过来又限制了硅藻对铁的利用；(3)初级生产和碳出口通量在低铁的北部急流中最高，这反映了陆架宽度的差异，从而反映了上升水的铁含量。此外，该项目将确定季风强度和轨迹随气候变化而预测的变化将如何影响该地区的碳和氮循环。至于更广泛的影响，该项目将进一步促进来自美国、印度(国家海洋研究所物理研究实验室)和阿曼(苏丹·卡布斯大学)的科学家之间的合作。

ABSTRACTOCE-0748064An invitation to participate in a cruise to the Arabian Sea during and after the SW monsoon provides a scientist from the University of Southern California with a unique opportunity to determine which of the two conclusions put forth to date, Fe limitation or grazing, is responsible for regulating primary production in this region. Specifically, the researcher plans to test the following three hypotheses: (1) growout experiments would be used to show that carbon fixation in the western Arabian Sea is Fe-limited; (2) carbon fixation is limited by Fe and Cu, which in turn limit Fe utilization by diatoms; and (3) primary production and carbon export fluxes would be highest in the low Fe northern jets reflecting differences in shelf width and thereby the Fe content of upwelled water. Also, this project would identify how projected changes in monsoon intensity and trajectories in response to climate change would influence carbon and nitrogen cycling in this area.As regards broader impacts, this project would further a collaboration between scientists from the U.S., India (National Institute of Oceanography, Physical Research Laboratory), and Oman (Sultan Qaboos University).