Bio-Argo浮标观测北大西洋色素与颗粒物的季节分布  

Seasonal distributions of pigment and particle in the North Atlantic observed by a Bio-Argo float

作　　者：邢小罡[1,2] 邱国强[2] 王海黎[2] 

机构地区：[1]中国海洋大学物理海洋教育部重点实验室,青岛266003 [2]厦门大学近海海洋环境科学国家重点实验室,厦门361005

出　　处：《高技术通讯》2014年第1期55-64,共10页Chinese High Technology Letters

基　　金：国家自然科学基金(41206028;41076114;41023007);近海海洋环境科学国家重点实验室(厦门大学)访问学者基金(MELRS1220);海洋公益性行业科研专项(201005030)资助项目

摘　　要：通过一台Bio-Argo浮标在北大西洋(冰岛附近)运行近2年(2008年6月-2010年5月)获得的观测数据,分析与研究了该海区叶绿素a浓度([Chla])、颗粒物后向散射(b_(bp)p(532))和光束衰减系数(c_p(660))的季节变化及其生物光学关系。研究表明,北大西洋生物光学参量存在明显夏高冬低的季节分布,其中表层[Chla]最高超过2mg m^(-3),最低仅为0.05mg m^(-3);c_p(660)的季节变化更明显,幅度超过2个数量级;b_(bp)(532)则存在一个明显的背景值,约为0.00065 m^(-1),可能是一种非藻类颗粒物的存在或是来源于仪器的测量误差;[Chla]、c_p(660)以及b_(bp)(532)之间均呈良好的指数相关关系,但在后向散射的高值区(>0.004 m^(-1)),生物光学关系减弱,可能是由于北大西洋的夏季浮游植物种群的变化。Based on the in situ dataset observed by a Bio-Argo float deployed in the North Atlantic （near Iceland）from Jun. 2008 to May 2010, the seasonal variations of chlorophyll-a concentration （[ Chla] ）, particulate backscattering （bbp （532））, beam attenuation coefficient（ cp （660））, as well as the bio-optical relationships between them in the sea area, were studied and analyzed. The results showed that, there existed very obvious seasonality for all the three bio-optical properties, higher in summer and lower in winter. The [ Chla ] at surface varied from 0.05 to 2 mg m - 3, the cp （660） had a more strong seasonal fluctuation over 2 order of magnitude, and the bbp （532） had an obvious background value （ - 0. 00065 m- 1 ）, owing to either the presence of non-algal particles or the uncertainties of in- strument. The mutual relationships between the [ Chla ], cp （ 660 ） and bbp （ 532 ）, were fitted well by a power func- tion, but in the region of relatively strong backscattering （ bbp （532） 〉 0.004 m - 1 ）, their correlations declined, per- haps owing to the change of algal community in summer.

关 键 词：Bio-Argo浮标 北大西洋 叶绿素A浓度 颗粒物后向散射系数 颗粒物光束衰减系数 

分 类 号：P715.2[天文地球—海洋科学]