How Are Under Ice Phytoplankton Related to Sea Ice in the Southern Ocean?
How Are Under Ice Phytoplankton Related to Sea Ice in the Southern Ocean?
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DOI：
10.1029/2021gl095051
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发表时间：
2021-11-16
影响因子：
5.2
通讯作者：
Cael, B. B.
中科院分区：
文献类型：
--
作者：
Bisson, K. M.;Cael, B. B.
人们对南大洋冰下浮游植物知之甚少，尽管怀疑它们有可能--冰和分层条件--产生水华。我们使用一种分布的方法来询问南大洋海冰和冰下浮游植物的特征是如何相关的，规避了缺乏共同定位的冰和浮游植物数据。我们利用所有可用的Argo浮标剖面，以及ICESat-2的干舷（海平面以上海冰的高度）和铅（产生开放水域的冰裂缝）数据，来描述随时间的变化。我们计算的概率分布的最大叶绿素，颗粒后向散射，这些最大值的深度，干舷，和冰的厚度的时刻。Argo时刻与干舷方差，铅含量和混合层深度显着相关，这意味着海冰动力学驱动浮游生物调制多少光，他们收到。我们讨论了生态影响的数据限制的背景下，并主张诊断模型和实地研究，以测试影响冰下浮游植物的其他过程。
Little is known about Southern Ocean under-ice phytoplankton, despite their suspected potential-ice and stratification conditions permitting-to produce blooms. We use a distributional approach to ask how Southern Ocean sea ice and under-ice phytoplankton characteristics are related, circumventing the dearth of co-located ice and phytoplankton data. We leverage all available Argo float profiles, together with freeboard (height of sea ice above sea level) and lead (ice fractures yielding open water) data from ICESat-2, to describe co-variations over time. We calculate moments of the probability distributions of maximum chlorophyll, particulate backscatter, the depths of these maxima, freeboard, and ice thickness. Argo moments correlate significantly with freeboard variance, lead fraction, and mixed layer depth, implying that sea ice dynamics drive plankton by modulating how much light they receive. We discuss ecological implications in the context of data limitations and advocate for diagnostic models and field studies to test additional processes influencing under-ice phytoplankton.