Vertical average irradiance shapes the spatial pattern of winter chlorophyll-a in the Yellow Sea
Vertical average irradiance shapes the spatial pattern of winter chlorophyll-a in the Yellow Sea
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垂直平均辐照度塑造黄海冬季叶绿素a的空间格局
DOI：
10.1016/j.ecss.2019.04.042
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发表时间：
2019-08
期刊：
影响因子：
--
通讯作者：
Liu Dongyan
中科院分区：
文献类型：
--
作者：
Lin Lei;Wang Yueqi;Liu Dongyan
在冬季，温带大陆架强烈的湍流增强了水柱的垂直混合，从而泵出营养物质，并在海洋上层引起高浊度。因此，光有效性往往成为影响冬季浮游植物生物量及其空间格局的重要因素。为了定量评价冬季光照有效性对黄海浮游植物空间格局的影响，采用垂直平均辐照度（Im）作为浮游植物垂直运动过程中平均辐照度的光指数，分析了冬季气候因子与叶绿素-a （Chl-a）的空间相关性。一组高分辨率卫星气候数据（2003-2016）的结果表明，Chl-a与dimin空间之间存在显著的正相关（R= 0.71,p< 0.0001）。2016年冬季的观测数据进一步表明，由于几乎整个海域的营养物充足而光的可用性非常有限，因此atim在确定Chl-a浓度的空间格局中比营养物更重要。Chl-a地区相对较高(> 1 mg / m3)在回应一个环境条件ofIm > 50 μ摩尔光子/ m2 / s,总悬浮物浓度(TSM) < 10 mg / L,和混合层深度(MLD) < 40 m。在沿海水域，TSM是造成低潮的关键因素；而在深海海域，MLD对于确定其数值更为重要。
Strong turbulence in temperate shelves during winter months enhances the vertical mixing of the water column, consequently pumps up nutrients and induces high turbidity in the upper ocean. Thus, light availability often becomes an important factor to impact phytoplankton biomasses and their spatial patterns in winter. To quantitatively assess the effect of light availability on the spatial pattern of phytoplankton in the Yellow Sea in winter, we used vertical average irradiance (Im) as a light index which denotes the average irradiance received by phytoplankton during their vertical motion, and then analyzed the spatial correlation between winter climatologicalImand chlorophyll-a (Chl-a). The result from a set of high-resolution satellite-derived climatological data (2003–2016) demonstrated that there is a significantly positive correlation (R= 0.71,p< 0.0001) between Chl-a andImin space. The observational data of 2016 winter further showed thatImis much more important in determining the spatial pattern of Chl-a concentrations than nutrients, due to the availability of sufficient nutrients but very limited light availability for almost the entire sea area. Relatively high Chl-a regions (>1 mg/m3) are in response to an environmental condition ofIm> 50 μmol photons/m2/s, total suspended matter concentration (TSM) < 10 mg/L, and mixed layer depth (MLD) < 40 m. In coastal waters, TSM is the key factor to cause lowIm; while MLD is more important in deep offshore waters to determine theImvalues.
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DOI：
10.1016/j.ecss.2011.03.007
发表时间：
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期刊：
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