北黄海夏季温盐年际变化时空模态与气候响应

发布时间：2018-01-23 23:28

本文关键词： 物理海洋学北黄海温度盐度时空模态冷水团 REOF分析　出处：《应用海洋学学报》2016年04期 　论文类型：期刊论文

【摘要】：根据北黄海断面1976~2015年历年8月温度、盐度与长岛气候要素资料,采用旋转经验正交函数(REOF)、最大熵谱分析和延迟相关分析等方法,研究了北黄海断面夏季温度、盐度年际变化时空模态与气候响应.断面温度主要有4种时空模态:第一、二模态为海洋因素影响的年际变化分量,渤海断面夏季温度分量和7月太平洋年代际振荡(PDO)指数的线性与非线性作用是主要影响因素.第三、四模态为海洋与大气因素影响的年际变化分量,渤海断面夏季温度分量、断面冬季表层平均温度、7月风驱环流强度和5月PDO指数的线性和非线性作用是主要影响因素.断面盐度主要有4种时空模态:第一模态为海洋与大气因素影响的年际变化分量,渤海夏季盐度、夏季降水量及断面冬季表层盐度是主要影响因素;8月纬向风驱环流是次要影响因素.第二至四模态为大气因素影响的年际变化分量,7、8月风驱环流强度和夏季降水量是主要影响因素.北黄海夏季风驱环流分布是北黄海断面夏季温盐年际平均分布的主要影响因素.断面温盐垂直层结年际变化为准平衡态周期年际变化.北黄海断面冷水团月平均温度和面积为准平衡态周期年际变化,断面温度第三模态、断面冬季表层平均温度是断面冷水团月强度年际变化的主要影响因素,7月PDO指数是非线性影响因素.北黄海断面冷水团月平均盐度为显著线性低盐趋势周期年际变化,断面盐度的第一至三模态以及渤海断面夏季盐度分量的线性和非线性作用是冷水团月平均盐度年际变化的主要影响因素.北黄海断面夏季冷水团中平均温度、盐度的长期变化趋势是不同的,不存在长期稳定的比例关系.
[Abstract]:Based on the data of August temperature, salinity and climatic elements of long Island in the North Huang Hai section from 1976 to 2015, the methods of rotational empirical orthogonal function, maximum entropy spectrum analysis and delay correlation analysis were used. The temporal and spatial modes and climatic responses of summer temperature, interannual salinity variation and climate response of the North Huang Hai section are studied. There are mainly four temporal and spatial modes of cross-section temperature: first, the second mode is the interannual variation component affected by ocean factors. The linear and nonlinear effects of the summer temperature component of the Bohai cross-section and the PDO index of the Pacific Interdecadal Oscillation on July are the main influencing factors. Thirdly, the four-mode is the interannual variation component of the ocean and atmosphere factors. The summer temperature component of the Bohai Sea cross-section and the average surface temperature in winter. The wind driven circulation intensity in July and the linear and nonlinear effects of PDO exponent on May are the main influencing factors. There are mainly four temporal and spatial modes of section salinity: the first mode is the interannual variation component of ocean and atmosphere factors. The main influencing factors are summer salinity, summer precipitation and surface salinity in winter. In August, the zonal wind-driven circulation is a secondary factor, and the second to fourth modes are the interannual variation components of atmospheric factors. In August, the intensity of wind-driven circulation and summer precipitation were the main influencing factors. The distribution of summer monsoon drive circulation of North Huang Hai was the main influencing factor of the average distribution of summer temperature and salt in North Huang Hai section. The interannual variation of vertical stratification of cross-section temperature and salt was as follows. The monthly mean temperature and area of the chilled water mass in the North Huang Hai section are interannual variation of quasi-equilibrium period. In the third mode of cross-section temperature, the average surface temperature of cross-section in winter is the main factor influencing the interannual variation of monthly strength of cross-section chilled water mass. In July, the PDO index was a nonlinear factor. The monthly average salinity of the cold water mass in the North Huang Hai section was significantly linear and interannual with the trend of low salinity. The first to third modes of cross section salinity and the linear and nonlinear effects of summer salinity component of Bohai cross section are the main influencing factors of the interannual variation of monthly average salinity of cold water mass, and the average temperature in summer cold water mass of North Huang Hai section. The long-term variation trend of salinity is different, and there is no long-term stable proportional relationship.
【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)
【分类号】：P731.1;P732
【正文快照】： (1.山东省海洋生态环境与防灾减灾重点实验室山东青岛,266033;2.国家海洋局北海环境监测中心山东青岛266033;3.海洋溢油鉴别与损害评估技术国家海洋局重点实验室山东青岛266033)北黄海是以山东半岛东端成山头为界的北部黄海,北黄海西部通过渤海海峡与渤海相通;南部与南黄海相

【相似文献】