黄海pH值场季节循环时空模态与机制

发布时间：2019-05-07 12:32

【摘要】：根据黄海1977年5月至1981年11月逐月温度、盐度、溶解氧含量和pH值大面调查资料以及黄海大气CO2浓度观测月平均值资料,采用旋转经验正交函数(REOF)、调和分析和延迟相关分析等方法,分析了黄海pH值场季节循环时空模态与机制.黄海pH值场季节循环主要有两种时空模态:上层(表层至20 m)pH值场第一、二模态空间分量为南北型分布,海气CO2交换、生物活性组分光合与呼吸作用以及表层pH值模态位相向深层垂直传播是主要影响因素;下层(30 m至底层)pH值场第一、二模态空间分量为东西型分布,沉积物需氧、生物碎屑分解耗氧等是主要影响因素.pH值模态空间分量垂直分布为两层结构,pH值模态时间分量中周期分量不是主要分量,并且季节周期循环稳定性较弱,容易受到年际变化分量的影响产生季节循环变异.pH值场季节循环模态在表、中、底层存在不同的季节变化扰动源,表层扰动源中,海气CO2交换作用和表观耗氧量物理-生物效应的非线性作用分别是主要、次要影响因素;中层扰动源中,中层表观耗氧量物理-生物效应过程以及相邻上下层pH值扰动传入是主要影响因素;底层扰动源中,底层表观耗氧量物理-生物效应过程是主要影响因素,沉积物需氧、底层温度、盐度是次要影响因素.在平均季节分布中,海气CO2交换作用产生的黄海表层pH值场季节扰动占优势,季节变化位相自表层传播至底层需1个月.黄海表、中、底层pH值扰动源的分层效应,在年际变化中比季节循环变化中的表现更为显著.
[Abstract]:Based on the monthly survey data of temperature, salinity, dissolved oxygen content and pH value of Huang Hai from May 1977 to November 1981, and the monthly mean data of Huang Hai atmospheric CO2 concentration, the rotational empirical orthogonal function (REOF),) was used. By means of harmonic analysis and delay correlation analysis, the temporal and spatial modes and mechanisms of the seasonal cycle of Huang Hai's pH value field are analyzed. There are two main spatio-temporal modes in the seasonal cycle of Huang Hai's pH value field: the upper layer (top layer to 20 m) pH value field first, the second mode spatial component is the north-south type distribution, the sea-air CO2 exchange, and so on). The photosynthesis and respiration of the bioactive components and the vertical propagation of the mode phase of the surface pH value to the deep layer were the main influencing factors. The lower layer (30 m to bottom) pH value field is the first, the second mode spatial component is east-west type distribution, sediment oxygen demand, bioclastic decomposition oxygen consumption and so on are the main influencing factors, pH value modal spatial component vertical distribution is two-layer structure. The periodic component of the pH modal time component is not the main component, and the seasonal cyclic stability is weak, which is easily influenced by the interannual variation component to produce the seasonal cyclic variation. The seasonal cyclic mode of the pH value field is in the table, and the seasonal cyclic mode of the pH field is in the table. There are different seasonal disturbance sources in the bottom layer. The nonlinear effects of air-sea CO2 exchange and apparent oxygen consumption physical-biological effects are the main and secondary factors in the surface layer disturbance sources. The physical-biological effect process of apparent oxygen consumption in the middle layer and the input of pH disturbance in the adjacent upper and lower layers are the main influencing factors in the middle layer disturbance source. The physical-biological effect process of apparent oxygen consumption in the bottom layer is the main influencing factor, and the oxygen demand, temperature and salinity of the sediment are the secondary factors. In the mean seasonal distribution, the seasonal disturbance of the surface pH field of Huang Hai produced by the air-sea CO2 exchange is dominant, and it takes one month for the seasonal phase to propagate from the surface to the bottom. The delamination effect of the low-level pH disturbance source is more significant in the interannual variation than in the seasonal cyclic variation in the yellow sea surface and in the middle and bottom of the sea table.
【作者单位】：山东省海洋生态环境与防灾减灾重点实验室;国家海洋局北海环境监测中心;海洋溢油鉴别与损害评估技术国家海洋局重点实验室;
【基金】：山东省海洋生态环境与防灾减灾重点实验室资助项目(2011011) 海洋溢油鉴别与损害评估技术国家海洋局重点实验室资助项目(2015010)
【分类号】：P73

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