| 摘要: |
| 利用中国南极科学考察期间获得的颗粒物样品, 对南大洋普里兹湾海域水体中生物硅的含量分布及年际变化情况进行了分析。研究结果显示: 在2013 年夏季普里兹湾表层水体中生物硅含量在0.38—8.62μmol/dm3 之间变化, 平均为1.55±1.86μmol/dm3。生物硅在67°S 以南湾内区域表层水体中的含量明显高于67°S 以北的湾外区域, 最大值出现在普里兹湾陆架区, 生物因子是表层水体生物硅含量分布的主控因子。根据不同年份即25、26、27、28、29 次南极科学考察期间获取的数据研究显示, 普里兹湾表层水体中生物硅含量存在明显的年际差异。历史数据分析结果表明, 气候事件对普里兹湾海冰变化有明显的影响, 因而对相应年份该海域浮游植物数量和种群结构也会产生一定的影响, 从而导致表层水体中生物硅含量的年际差异。 |
| 关键词: 生物硅 颗粒物 浮游植物 普里兹湾 气候事件 |
| DOI：10.11693/hyhz20140700207 |
| 分类号: |
| 基金项目:国家自然科学基金项目,41206182号,41406219号,41306202号,41376173号;国家海洋局二所基本科研业务费项目,JT1405号,JG1313号;南北极环境综合考察与评估专项项目,CHINARE2014-04-01号,CHINARE2014-04-04号,CHINARE2014-01-04号。 |
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| INTERANNUAL CHANGE OF BIOGENIC SILICON CONTENTS IN SURFACE WATER OF PRYDZ BAY DURING 2009—2013 AND ITS RELATIONSHIP TO GLOBAL CLIMATE EVENTS |
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HU Chuan-Yu1,2, HAN Zheng-Bing1,2, SUN Wei-Ping1,2, CHEN Ji-Yu1,2
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1.Lab of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;2.Second Institute of Oceanography, SOA, Hangzhou 310012, China
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| Abstract: |
| To understand the relationship between annual change of particulate biogenic silica (PBSi) contents in Prydz Bay in Antarctic and global climate events, we studied the contents and distributions of PBSi in surface water of the bay during the CHINARE cruises from 2009 to 2013. The results show that in austral summer of 2013, the contents of biogenic silica ranged 0.23—8.62μmol/dm3 in average of 1.55±1.86μmol/dm3, and the distribution of surface PBSi showed clear regional patterns, higher concentrations in the area south of 67°S and lower in the area north. The interannual difference of PBSi content in the surface water of the bay was obvious during 2009—2013. In addition, historical data show that the global climate events affected clearly the variation of sea ice in the Antarctic, and the local population structures of phytoplankton changed correspondingly, resulting in the interannual difference in PBSi concentration and distribution in the sea surface. |
| Key words: biogennic silica particle phytoplankton Prydz Bay climate event |
