摘要
在南极普里兹湾外开阔海域布放时间系列沉积物捕获器，研究沉降颗粒物中生源组分（生物硅、有机质、碳酸钙）通量、组成、来源及元素的摩尔比值的生物地球化学意义，结果表明III-1＋站在1000m处颗粒物总通量的变化为13．00-334．59mg／（d·m^2），颗粒物中以生物硅为主，占总通量的80％以上；各组分通量呈现明显的季节性变化．结合罗斯海沉降颗粒物通量和元素的摩尔比值的对比研究表明，研究海域1000m深的沉降颗粒物中生物硅与有机碳元素摩尔比值、无机碳与有机碳的元素摩尔比值较高，表明研究海域生物硅与有机碳生物地球化学循环过程是非耦合的，生物活动有效地将CO2由表层水中移出．
Time-series Mark VII sediment trap was deployed at 62°28′63″S ,72°58′55″E（north of the Prydz Bay, Antarctica） during the cruise of CHINARE-15 cooperated with the Marine University of America. Biogenic components were investigated in order to reveal the composition characteristics and biogeochemistry of sinking particles in the deep ocean. The results show that the total mass flux of sinking particles at 1 000 m depth ranges from 13.00 to 334. 59 mg/（m^2. d） and is high seasonal, the main part of particles is biogenic matter, accounting for more than 80% of the biogenic matter. The observation of high ratio of biogenic silicon content to organic carbon one and ratio of inorganic carbon content to organic carbon one suggests that organic carbon and biogenic silicon cycles are non-coupled in the study area, CO2 is removed from surface water by biological activity.
出处
《海洋学报》
CAS
CSCD
北大核心
2006年第5期49-55,共7页
基金
"十五"社会基础研究专项资金资助项目(2002DEA30027-5)
国家海洋局青年基金资助项目(2004605)
