台湾龟山岛东南部海域白色热泉特征分析  

Characteristic analysis of White hydrothermal vent in the southeastern Kueishantao Islet off Taiwan Island

作　　者：韩沉花[1] 叶瑛[2] 潘依雯[2] 秦华伟[3] 

机构地区：[1]国家海洋局第二海洋研究所国家海洋局海洋生态系统与生物地球化学重点实验室,浙江杭州310012 [2]浙江大学海洋科学与工程学院,浙江杭州310028 [3]杭州电子科技大学机械工程学院,浙江杭州310018

出　　处：《海洋学报》2014年第2期130-136,共7页

基　　金：国际海域资源调查与开发"十二五"课题(DY125-11-R-04);国家海洋局第二海洋研究所基本科研业务费专项资金项目(JG1216);浙江省博士后基金二类资助项目;国家海洋局青年科学基金;国家973项目课题(2012CB417305)

摘　　要：海底热液活动及其周边环境的调查研究是海洋科学领域的热点之一。海底热液喷口环境的物理化学参数,尤其是浅水型热液,会受到潮汐变化的影响。台湾龟山岛靠近冲绳海槽南端分布有多处浅水型热液喷口(<30m)。2010年5月,浙江大学、杭州电子科技大学和台湾中山大学对该海域实施了联合考察,利用电化学传感器获得了低温热液喷口(24.834 14°N,121.961 91°E)连续87h的温度和pH现场观测数据。基于Morlet复小波变换方法,分析了浅水型热液喷口的温度和pH现场观测时间序列的变化周期,并通过与当地潮汐记录数据作比较,获得了其与潮汐信号之间的潜在关系,证实了潮汐变化是海底白色热泉喷口物理化学参数现场观测最主要的影响因素。温度和pH现场观测数据经Morlet复小波变换后的小波系数分别存在规律的12.9h和12.5h变化周期,并且温度的小波系数在准半日周期尺度与潮汐高度呈负相关变化,相关系数为-0.89;pH的小波系数情况相反,相关系数为0.76。Investigation into seafloor hydrothermal activity and its surroundings has been one key point of studying ocean sciences .Physical and chemical parameters obtained from the hydrothermal environments would be influ -enced by the tide ,especially from the shallow hydrothermal vent .It is distributing many hydrothermal vents on the less than 30 meter shallow seafloor of Kueishantao Islet ,Northeast offshore Taiwan Island ,close to the south-ern Okinawa Trough .Zhejiang University ,Hangzhou Dianzi University ,and Taiwan Sun Yat-sen University to-gether carried a joint investigation into seafloor hydrothermal near Kueishan island sea area and obtained continuous temperature and pH field observation data of a low-temperature hydrothermal vent （24.83414° N ,121.961 91° E） for about 87 hours .Based on Morlet complex wavelet transform method ,after compared the calculating results with the recorded tidal height variance ,the potential periodic relationship between temperature and pH field ob-served time series of shallow hydrothermal vent and tide signal can be studied .The result evidenced that tide is the main impact factor for field investigating seafloor physical and chemical parameters of white hydrothermal vent . The wavelet coefficients of the in-situ temperature and pH data after Morlet complex wavelet transform exist regu-lar 12.9 h and 12.5 h periods .Besides ,wavelet coefficients of the temperature are negative correlated with the tid-al height at this semi-diurnal time scale with the correlation coefficient -0.89 ,and pH wavelet coefficient is the opposite case with the correlation coefficient 0.76 .

关 键 词：台湾龟山岛 海底热泉 温度 酸碱度 小波分析 潮汐周期性 

分 类 号：P714[天文地球—海洋科学]