利用经验正交函数数据插值法重构东中国海叶绿素a质量浓度场  

Reconstruction of chlorophyll a mass concentration in the East China Sea using Data INterpolating Empirical Orthogonal Functions

作　　者：何海伦[1] 李熠[1] 王渊[1] 宋迅殊[1] 刘晓辉[1] 

机构地区：[1]卫星海洋环境动力学国家重点实验室国家海洋局第二海洋研究所,浙江杭州310012

出　　处：《海洋学研究》2013年第2期10-15,共6页Journal of Marine Sciences

基　　金：国家自然科学基金重大研究计划重点支持资助项目(91128204);国家自然科学基金青年科学基金资助项目(41106019;41106020);国家博士后基金资助项目(20100481449);国家海洋局第二海洋研究所基本科研业务费专项资助项目(GT1205)

摘　　要：利用经验正交函数数据插值法(Data INterpolating Empirical Orthogonal Functions)重构由MODIS-Aqua卫星提供的三级产品叶绿素a质量浓度,得到了从2003—2009年东中国海叶绿素a质量浓度的月平均场。东中国海近岸叶绿素a质量浓度7a平均值明显高于外海。对叶绿素a质量浓度季节平均场进行分析研究表明,东中国海叶绿素a质量浓度主要受长江径流、海表水温和季风的影响。对叶绿素a质量浓度异常场进行EOF分析表明,第一模态方差贡献为37.8%,空间分布显示,在长江口东北部出现叶绿素a质量浓度异常高值区,时间变化以半年和半年以下周期为主;第二模态方差贡献为21.4%,空间分布显示,在长江口东部出现叶绿素a质量浓度异常高值区,时间系数主要表现为年际变化。Data INterpolating Empirical Orthogonal Functions（DINEOF） were used to reconstruct the chlorophyll a mass concentration from the three-level product of the MODIS-Aqua satellite.The monthly chlorophyll a mass concentration from 2003 to 2009 was obtained.The analysis on the filled data showed that the 7-years averaged chlorophyll a mass concentration in the nearshore is significantly larger than the one in the offshore.The seasonal chlorophyll-a mass concentration supports the conclusion that chlorophyll a in the East China Sea is mainly controlled by runoff of Changjiang River,sea surface temperature and monsoon.Furthermore,Empirical Orthogonal Functions were imposed on the chlorophyll a anomaly,and results showed that the first mode contribution is 37.8%,also the spatial pattern shows large value in the north-east of Changjiang River,and the corresponding temporal period is dominated by half a year or less.Meanwhile,the second mode contribution is 21.4%,the spatial pattern presents high value in the east of Changjiang River,and its temporal coefficient shows the inter-annual variance.

关 键 词：叶绿素a质量浓度 经验正交函数数据插值法 东中国海 

分 类 号：P734.2[天文地球—海洋化学] X145[天文地球—海洋科学]