Phytoplankton and light limitation in the Southern Ocean: Learning from high‐nutrient, high‐chlorophyll areas
Phytoplankton and light limitation in the Southern Ocean: Learning from high‐nutrient, high‐chlorophyll areas
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DOI：
10.1029/2009jc005361
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发表时间：
2010-02
影响因子：
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通讯作者：
H. Venables;C. M. Moore
中科院分区：
文献类型：
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作者：
H. Venables;C. M. Moore
[1]南大洋的大部分地区是一个高营养、低叶绿素（HNLC）地区。在一些岛屿的下游，这种情况也有例外，岛屿或周围浅高原的铁使混合层肥沃，导致春季和夏季浮游植物大量繁殖。发生这种情况的主要地点是南格鲁吉亚、克罗泽和凯尔盖朗群岛的下游。混合层深度的数据从阿尔戈浮标配置文件，以及海洋观察宽视场传感器叶绿素a（叶绿素a）和光合有效辐射从这些高营养，高叶绿素（HNHC）地区相结合，研究混合层平均光可用性对浮游植物浓度的影响，在铁限制已被解除的地区。然后将分析结果转移到HNLC地区，以评估全年光限制的潜在重要性。我们的结论是，光照限制并没有显着限制HNLC南大洋叶绿素a的年度综合现存量。
[1] Most of the Southern Ocean is a high-nutrient, low-chlorophyll (HNLC) area. There are exceptions to this situation downstream of some of the islands, where iron from the islands or surrounding shallow plateau fertilizes the mixed layer and causes a phytoplankton bloom in spring and summer. The main locations where this occurs are downstream of the South Georgia, Crozet, and Kerguelen islands. Data on mixed layer depths from Argo float profiles together with Sea-viewing Wide Field-of-view Sensor chlorophyll a (chl a) and photosynthetically available radiation from these high-nutrient, high-chlorophyll (HNHC) areas are combined to study the effects of mixed layer-averaged light availability on phytoplankton concentrations in areas where iron limitation has been lifted. The results of this analysis are then transferred to HNLC areas to assess the potential importance of light limitation through the year. We conclude that light limitation does not significantly constrain the annual integrated standing stock of chl a in the HNLC Southern Ocean.