中文摘要：

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（bbp（532））和光束衰减系数（cp（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O.05mgm-3;cp（660）的季节变化更明显,幅度超过2个数量级；bbp（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]、cp（660）以及bbp（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.

英文摘要：

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.