南极普里兹湾外海沉降颗粒物通量、组成变化及其与罗斯海对比研究

扈传昱; 潘建明; 张海生; 于培松; 薛斌

南极普里兹湾外海沉降颗粒物通量、组成变化及其与罗斯海对比研究

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

基金项目: “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)

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出版历程
- 收稿日期: 2005-09-26
- 修回日期: 2005-12-01

Study of vertical particle fluxes and their composition in the deep ocean of the north open sea of the Prydz Bay,Antarctica and the comparison with the Ross Sea

Laboratory of Marine Ecosystem and Biogeochemistry of State Oceanic Administration, Hangzhou 310012, China

摘要

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·m²),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.
- 颗粒物通量 /
- 组成变化 /
- 南极普里兹湾 /
- 罗斯海
Abstract: 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 Univ ersity 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/(m²·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 suggest sthatorganic carbon and biogenic siliconcy cles are non-coupled in the study area, CO₂ is removed from surface water by biological activity.
- particle flux /
- composition /
- Prydz Bay,Antarctica /
- Ross Sea

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